NQB-420NWA-AN CUI

Document overview

  • Manufacturer or author: Provided By www.digicamel.com(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 30

Technical content

cui.com date 02/20/2013 page 1 of 30 SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS

FEATURES

  • industry standard quarter-brick 57.9 x 36.8 x 11.3 mm (2.28 x 1.45 x 0.445 in)
  • industry-leading power density for telecom and datacom 127~141W / sq. in
  • high efficiency, typ. 96.4% at half load,

12 Vout

  • fully regulated advanced bus converter from 36~75Vin
  • 2,250 Vdc input to output isolation
  • fast feed forward regulation to manage line transients
  • optional baseplate for high temperature

applications

  • droop load sharing with 10% current share accuracy
  • 2.9 million hours MTBF
  • ISO 9001/14001 certified supplier MODEL input voltage output voltage output current output wattage (Vdc) (Vdc) max (A) max (W) NQB-420NWA-AN 36~75 12 35 420 NQB-468NMA-AN 40~60 12 39 468 NQB-415NWB-AN 36~75 12.45 35 415 NQB-462NMB-AN 40~60 12.45 39 462 GENERAL CHARACTERISTICS
  • industry standard footprint
  • isolated topology
  • high power density
  • fast transient response
  • high conversion efficiency
  • wide range of input and output characteristics available

cui.com date 02/20/2013 │ page 2 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Nominal Output Voltage: A = 12.0 V B = 12.45 V C = 9.6 V D = 9.0 V E = 5.0 V PART NUMBER KEY NQB- XXX N X X - X X X X - XXX -ES X Input Voltage Range: W = wide (36~75 V) M = medium (40~60 V) Firmware Configuration: 000~ZZZ Base Number Design Output Power: 1~999 Example part number: NQB-420NWA-AN-001

420 W output power, no digital pins

wide input voltage range, 12.0 V output 5.33 mm pins, negative enable logic firmware revision 001 No Digital Interface Load Sharing Function: D = Vout droop Pin Description: S = SMT Enable Logic Sense: N = negative logic P = positive logic Heatsink Option: "blank" = open frame H = heatsink flat L = heatsink lateral fins T = heatsink transverse fins G = heatsink with GND pin Engineering Sample: ES Engineering Phase: A~Z Packaging: 20 converters(through hole pin)/tray, PE foam dissipative 20 converters(surface mount pin)/tray, Antistatic PPE

CONTENTS

Electrical Specification:

cui.com date 02/20/2013 │ page 3 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS General Information Reliability The failure rate (λ) and mean time between failures (MTBF= 1/ λ) is calculated at max output power and an operating ambient temperature (TA) of +40°C. CUI Power Modules uses Telcordia SR-332 Issue 2 Method 1 to calculate the mean steady-state failure rate and standard deviation (σ). Telcordia SR-332 Issue 2 also provides techniques to estimate the upper confidence levels of failure rates based on the mean and standard deviation. Mean steady-state failure rate, λ Std. deviation, σ h/seruliaFn9.06h/seruliaFn124 MTBF (mean value) for the NQB series = 2.9 Mh. MTBF at 90% confidence level = 2.4 Mh Compatibility with RoHS requirements The products are compatible with the relevant clauses and requirements of the RoHS directive 2011/65/EU and have a maximum concentration value of 0.1% by weight in homogeneous materials for lead, mercury, hexavalent chromium, PBB and PBDE and of 0.01% by weight in homogeneous materials for cadmium. Exemptions in the RoHS directive utilized in CUI Power Modules products are found in the Statement of Compliance document. Safety Specification Reliability CUI Power Modules DC/DC converters and DC/DC regulators are designed in accordance with the safety standards IEC 60950 1, EN 60950 1 and UL 60950 1 Safety of Information Technology Equipment. IEC/EN/UL 60950 1 contains requirements to prevent injury or damage due to the following hazards:

  • Electrical shock
  • Energy hazards
  • Fire
  • Mechanical and heat hazards
  • Radiation hazards
  • Chemical hazards On-board DC/DC converters and DC/DC regulators are defined as component power supplies. As components they cannot fully comply with the provisions of any safety requirements without “conditions of acceptability”. Clearance between conductors and between conductive parts of the component power supply and conductors on the board in the final product must meet the applicable safety requirements. Certain conditions of acceptability apply for component power supplies with limited stand-off (see Mechanical Information for further information). It is the responsibility of the installer to ensure that the final product housing these components complies with the requirements of all applicable safety standards and regulations for the final product. Component power supplies for general use should comply with the requirements in IEC/EN/UL 60950 1 Safety of Information Technology Equipment. Product related standards, e.g. IEEE 802.3af Power over Ethernet, and ETS 300132 2 Power interface at the input to telecom equipment, operated by direct current (dc) are based on IEC/EN/UL 60950 1 with regards to safety. CUI Power Modules DC/DC converters and DC/DC regulators are UL 60950 1 recognized and certified in accordance with EN 60950 1. The flammability rating for all construction parts of the products meet requirements for V 0 class material according to IEC 60695 11 10, Fire hazard testing, test flames – 50 W horizontal and vertical flame test methods. Isolated DC/DC converters Galvanic isolation between input and output is verified in an electric strength test and the isolation voltage (Viso) meets the voltage strength requirement for basic insulation according to IEC/EN/UL 60950-1. It is recommended to use a slow blow fuse at the input of each DC/DC converter. If an input filter is used in the circuit the fuse should be placed in front of the input filter. In the rare event of a component problem that imposes a short circuit on the input source, this fuse will provide the following functions:
  • Isolate the fault from the input power source so as not to affect the operation of other parts of the system
  • Protect the distribution wiring from excessive current and power loss thus preventing hazardous overheating The DC/DC converter output is considered as safety extra low voltage (SELV) if one of the following conditions is met:
  • The input source has double or reinforced insulation from the AC mains according to IEC/EN/ UL 60950-1
  • The input source has basic or supplementary insulation from the AC mains and the input of the DC/DC converter is maximum 60 Vdc and connected to protective earth according to IEC/EN/UL 60950-1
  • The input source has basic or supplementary insulation from the AC mains and the DC/DC converter output is connected to protective earth according to IEC/EN/UL 60950-1 Non - isolated DC/DC regulators The DC/DC regulator output is SELV if the input source meets the requirements for SELV circuits according to IEC/ EN/UL 60950-1.

cui.com date 02/20/2013 │ page 4 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Absolute Maximum Ratings parameter conditions/description min typ max units operating temperature (TP1) see thermal consideration section -40 +125 °C storage temperature (TS) -55 +125 °C input voltage (VI) -0.5 +80 +65* V isolation voltage (Viso) input to output test voltage, see note 1 2250 Vdc input voltage transient (Vtr) according to ETSI EN 300 132-2 and Telcordia GR- 1089-CORE +100 +80* V remote control pin voltage (VRC) see operating information section -0.3 18 V Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as no destruction limits, are normally tested with one parameter at a time exceeding the limits of Output data or Electrical Characteristics. If exposed to stress above these limits, function and performance may degrade in an unspecified manner. Note 1: Isolation voltage (input/output to base-plate) max 750 Vdc. * Applies for the narrow input version VI= 40-60 V Fundamental Circuit Diagram -IN +IN +OUT -OUT Driver Driver Control RC isolation Auxillary Supply RC Functional Description TP1, TP3 = -40 to +90ºC, VI = 36 to 75 V. Typical values given at: TP1, TP3 = +25°C, VI= 53 V, max IO , unless otherwise specified under Conditions Configuration File: 190 10-CDA 102 0314/001 parameter conditions/description min typ max units fault protection characteristics input under voltage lockout (UVLO) fault limit setpoint accuracy hysteresis delay 300 V V μs output voltage - under voltage protection fault limit fault response time 200 V μs output voltage - over voltage protection fault limit fault response time 15.6 200 V μs over current protection (OCP) setpoint accuracy (IO) fault limit fault response time 200 6 % A μs over temperature protection (OTP) fault limit hysteresis fault response time 125 300 ºC ºC μs

cui.com date 02/20/2013 │ page 5 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Electrical Specification

12.0 V, 35 A, 420 W

TP1, TP3 = -40 to +90ºC, VI = 36 to 75 V. Typical values given at: TP1, TP3 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions. Additional Cout = 3.5 mF, Configuration File: 19010-CDA 102 0314/001 parameter conditions/description min typ max units input voltage range (VI) 36 75 V turn-off input voltage (VIoff) decreasing input voltage 32 33 34 V turn-on input voltage (VIon) increasing input voltage 34 35 36 V internal input capacitance (CI) 18 μF output power (PO) 0 420 W efficiency (η) 50% of max IO max IO 50% of max IO, VI = 48 V max IO, VI = 48 V 96.2 95.5 96.4 95.5 power dissipation (Pd) max IO 19.8 29.5 W input idling power (Pli) IO = 0 A, VI = 53 V 3.3 W input standby power (PRC) VI = 53 V (turned off with RC) 0.4 W switching frequency (fs) 0-100% of max IO 140 kHz output voltage setting and ac- curacy (VOi) TP1 = +25°C, VI = 53 V, IO = 35 A 11.88 12.0 12.12 V output voltage tolerance band (VO) 0-100% of max IO 11.76 12.24 V line regulation (VO) max IO 21 55 mV load regulation (VO) VI = 53 V, 0-100% of max IO 6 40 mV load transient voltage deviation (Vtr) VI = 53 V, load step 25-75-25% of max IO, di/dt = 1 A/μs ±0.4 V load transient recovery time (ttr) VI = 53 V, load step 25-75-25% of max IO, di/dt =

1 A/μs 150 µs

ramp-up time (tr) - (from 10−90% of VOi) 10-100% of max IO, TP1, TP3 = 25ºC, VI = 53 V 8 ms start-up time (ts) - (from VI connection to 90% of VOi) 10-100% of max IO, TP1, TP3 = 25ºC, VI = 53 V 24 ms VI shut-down fall time (tf) - (from VI off to 10% of VO) max IO IO = 0 A, CO = 0 mF 3.6 ms s RC start-up time (tRC) max IO 12 ms RC shut-down fall time (tRC) - (from RC off to 10% of VO) max IO IO = 0 A, CO = 0 mF 5.1 ms s output current (IO) 0 35 A current limit threshold (Ilim) VO = 10.8 V, TP1, TP3 < max TP1, TP3 37 41 44 A short circuit current (Isc) TP1, TP3 = 25ºC, see Note 1 12 A recommended capacitive load (Cout) TP1, TP3 = 25ºC, see Note 2 0.1 3.5 6 mF output ripple & noise (VOac) See ripple & noise section, max IO , see Note 3 60 150 mVp-p over voltage protection (OVP) TP1, TP3 = 25°C, VI = 53 V, 10-100% of max IO 15.6 V remote control (RC) sink current (note 4), see operating information trigger level, decreasing RC-voltage trigger level, increasing RC-voltage 2.6 2.9 0.7 mA V V Note 1: OCP in hic-up mode 2: Low ESR-value 3: Cout = 100 µF, external capacitance 4: Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function.

cui.com date 02/20/2013 │ page 6 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics

12.0 V, 35 A / 420 W

noitapissiD rewoP ycneiciffE 100 05 10 15 20 25 30 35 [A] [%] 36 V 48 V 53 V 75 V 05 10 15 20 25 30 35 [A] [W] 36 V 48 V 53 V 75 V Efficiency vs. load current and input voltage at TP1, TP3 = +25□C Dissipated power vs. load current and input voltage at TP1, TP3 = +25°C Output Characteristics Current Limit Characteristics 11.8 11.9 12.0 12.1 12.2 05 10 15 20 25 30 35 [A] [V] 36 V 48 V 53 V 75 V 3.0 5.0 7.0 9.0 11.0 13.0 35 37 39 41 43 45 [A] [V] 36 V 48 V 53 V 75 V Output voltage vs. load current at TP1, TP3 = +25°C Output voltage vs. load current at IO > max IO , TP1, TP3 = +25°C

cui.com date 02/20/2013 │ page 7 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics Start-up enabled by connecting VI at: TP1, TP3 = +25°C, VI = 53 V, IO = 35 A resistive load. Top trace: output voltage (5 V/div.). Bottom trace: input voltage (50 V/div.). Time scale: (10 ms/div.). Shut-down enabled by disconnecting VI at: TP1, TP3 = +25°C, VI = 53 V, IO =35 A resistive load. Top trace: output voltage (5 V/div.). Bottom trace: input voltage (50 V/div.). Time scale: (2 ms/div.). esnopseR tneisnarT daoL tuptuO esioN & elppiR tuptuO Output voltage ripple at: TP1, TP3 = +25°C, VI = 53 V, IO = 35 A resistive load. Trace: output voltage (50 mV/div.). Time scale: (2 µs/div.). Output voltage response to load current step-change (8.75-26.25-8.75 A) at: TP1, TP3 =+25°C, VI = 53 V, CO = 3.5 mF. Top trace: output voltage (0.5 V/div.). Bottom trace: output current (20 A/div.). Time scale: (0.5 ms/div.). esnopseR tneisnarT egatloV tupnI Output voltage response to input voltage transient at: TP1, TP3 = +25°C, VI = 36-75 V, IO = 17 A resistive load, CO = 3.5 mF Top trace: output voltage (2 V/div.). Bottom trace: input voltage (20 V/div.). Time scale: (0.5 ms/div.).

cui.com date 02/20/2013 │ page 8 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics Output Current Derating – Open frame 02 04 06 08 0 100 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Output Current Derating – Base plate Thermal Resistance – Base plate 02 04 06 08 01 00 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. [°C/W] Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Thermal resistance vs. airspeed measured at the converter. Tested in wind tunnel with airflow and test conditions as per the Thermal consideration section. VI = 53 V. Output Current Derating – Base plate + Heat sink Output Current Derating – Cold wall sealed box 02 04 06 08 01 00 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. 02 04 06 08 01 00 [°C] A Tamb 85°C Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Tested with Plate Fin Transverse heatsink, height 0.23 In, P0114 Thermal Pad. Available load current vs. base plate temperature at 85ºC ambient. VI = 53 V. See Thermal Consideration section.

cui.com date 02/20/2013 │ page 9 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Electrical Specification

12.0 V, 39 A / 468 W

TP1, TP3 = -40 to +90ºC, VI = 40 to 60 V. Typical values given at: TP1, TP3 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions. Additional Cout = 3.9 mF, Configuration File: 19010-CDA 102 0314/002 Note 1: OCP in hic-up mode 2: Low ESR-value 3: Cout = 100 µF, external capacitance 4: Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function. parameter conditions/description min typ max units input voltage range (VI) 40 60 V turn-off input voltage (VIoff) decreasing input voltage 36 37 38 V turn-on input voltage (VIon) increasing input voltage 38 39 40 V internal input capacitance (CI) 18 μF output power (PO) 0 468 W efficiency (η) 50% of max IO max IO 50% of max IO, VI = 48 V max IO, VI = 48 V 96.7 95.7 96.8 95.6 power dissipation (Pd) max IO 21.2 30.5 W input idling power (Pli) IO = 0 A, VI = 53 V 2.8 W input standby power (PRC) VI = 53 V (turned off with RC) 0.4 W switching frequency (fs) 0-100% of max IO 140 kHz output voltage setting and ac- curacy (VOi) TP1 = +25°C, VI = 53 V, IO = 39 A 11.88 12.0 12.12 V output voltage tolerance band (VO) 0-100% of max IO 11.76 12.24 V line regulation (VO) max IO 31 60 mV load regulation (VO) VI = 53 V, 1-100% of max IO 5 25 mV load transient voltage deviation (Vtr) VI = 53 V, load step 25-75-25% of max IO, di/dt = 1 A/μs ±0.4 V load transient recovery time (ttr) VI = 53 V, load step 25-75-25% of max IO, di/dt = ramp-up time (tr) - (from 10−90% of VOi) 10-100% of max IO, TP1 = 25ºC, VI = 53 V 8 ms start-up time (ts) - (from VI connection to 90% of VOi) 10-100% of max IO, TP1 = 25ºC, VI = 53 V 24 ms VI shut-down fall time (tf) - (from VI off to 10% of VO) max IO IO = 0 A, CO = 0 mF ms s RC start-up time (tRC) max IO 12 ms RC shut-down fall time (tRC) - (from RC off to 10% of VO) max IO IO = 0 A, CO = 0 mF 4.5 ms s output current (IO) 0 39 A current limit threshold (Ilim) VO = 10.8 V, TP1, TP3 < max TP1, TP3 41 44 47 A short circuit current (Isc) TP1 = 25ºC, see Note 1 14 A recommended capacitive load (Cout) TP1 = 25ºC, see Note 2 0.1 3.9 6 mF output ripple & noise (VOac) See ripple & noise section, max IO , see Note 3 50 110 mVp-p over voltage protection (OVP) TP1, TP3 = 25°C, VI = 53 V, 10-100% of max IO 15.6 V remote control (RC) sink current (note 4), see operating information trigger level, decreasing RC-voltage trigger level, increasing RC-voltage 2.6 2.9 0.7 mA V V

cui.com date 02/20/2013 │ page 10 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics noitapissiD rewoP ycneiciffE 100 05 10 15 20 25 30 35 40 [A] [%] 40 V 48 V 53 V 60 V 05 10 15 20 25 30 35 40 [A] [W] 40 V 48 V 53 V 60 V Efficiency vs. load current and input voltage at TP1, TP3 = +25□C Dissipated power vs. load current and input voltage at TP1, TP3 = +25°C Output Characteristics Current Limit Characteristics 11.8 11.9 12.0 12.1 12.2 05 10 15 20 25 30 35 40 [A] [V] 40 V 48 V 53 V 60 V 3.0 5.0 7.0 9.0 11.0 13.0 39 41 43 45 47 [A] [V] 40 V 48 V 53 V 60 V Output voltage vs. load current at TP1, TP3 = +25°C Output voltage vs. load current at IO > max IO , TP1, TP3 = +25°C

cui.com date 02/20/2013 │ page 11 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics Start-up enabled by connecting VI at: TP1, TP3 = +25°C, VI = 53 V, IO = 39 A resistive load. Top trace: output voltage (5 V/div.). Bottom trace: input voltage (50 V/div.). Time scale: (10 ms/div.). Shut-down enabled by disconnecting VI at: TP1, TP3 = +25°C, VI = 53 V, IO =39 A resistive load. Top trace: output voltage (5 V/div.). Bottom trace: input voltage (50 V/div.). Time scale: (2 ms/div.). esnopseR tneisnarT daoL tuptuO esioN & elppiR tuptuO Output voltage ripple at: TP1, TP3 = +25°C, VI = 53 V, IO = 39 A resistive load. Trace: output voltage (50 mV/div.). Time scale: (2 µs/div.). Output voltage response to load current step-change (9.75-29.25-9.75 A) at: TP1, TP3 =+25°C, VI = 53 V, CO = 3.9 mF. Top trace: output voltage (0.5 V/div.). Bottom trace: output current (20 A/div.). Time scale: (0.5 ms/div.). esnopseR tneisnarT egatloV tupnI Output voltage response to input voltage transient at: TP1, TP3 = +25°C, VI = 40-60 V, IO = 19,5 A resistive load, CO = 3.9 mF Top trace: output voltage (2 V/div.). Bottom trace: input voltage (20 V/div.). Time scale: (0.5 ms/div.).

cui.com date 02/20/2013 │ page 12 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics Output Current Derating – Open frame 02 04 06 08 01 00 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Output Current Derating – Base plate Thermal Resistance – Base plate 02 04 06 08 01 00 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. [°C/W] Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Thermal resistance vs. airspeed measured at the converter. Tested in wind tunnel with airflow and test conditions as per the Thermal consideration section. VI = 53 V. Output Current Derating – Base Plate + Heat sink Output Current Derating – Cold wall sealed box 02 04 06 08 01 00 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. 02 04 06 08 01 00 [°C] A Tamb 85°C Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Tested with Plate Fin Transverse heatsink, height 0.23 In, P0114 Thermal Pad. Available load current vs. base plate temperature at 85ºC ambient. VI = 53 V. See Thermal Consideration section.

cui.com date 02/20/2013 │ page 13 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Electrical Specification

12.45 V, 35 A / 415 W

TP1, TP3 = -40 to +90ºC, VI = 36 to 75 V. Typical values given at: TP1, TP3 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions. Additional Cout = 3.9 mF, Configuration File: 19010-CDA 102 0314/014 Note 1: OCP in hic-up mode 2: Low ESR-value 3: Cout = 100 µF, external capacitance 4: Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function. parameter conditions/description min typ max units input voltage range (VI) 36 75 V turn-off input voltage (VIoff) decreasing input voltage 32 33 34 V turn-on input voltage (VIon) increasing input voltage 34 35 36 V internal input capacitance (CI) 18 μF output power (PO) 0 415 W efficiency (η) 50% of max IO max IO 50% of max IO, VI = 48 V max IO, VI = 48 V 96.2 95.5 96.4 95.5 power dissipation (Pd) max IO 19.5 29.5 W input idling power (Pli) IO = 0 A, VI = 53 V 3.2 W input standby power (PRC) VI = 53 V (turned off with RC) 0.4 W switching frequency (fs) 0-100% of max IO 140 kHz output voltage setting and ac- curacy (VOi) TP1 = 25°C, VI = 53 V, IO = 0 A 12.415 12.45 12.485 V output voltage tolerance band (VO) 0-100% of max IO 11.5 12.7 V line regulation (VO) max IO 20 55 mV load regulation (VO) VI = 53 V, 0-100% of max IO 500 600 700 mV load transient voltage deviation (Vtr) VI = 53 V, load step 25-75-25% of max IO, di/dt = 1 A/μs ±0.4 V load transient recovery time (ttr) VI = 53 V, load step 25-75-25% of max IO, di/dt = ramp-up time (tr) - (from 10−90% of VOi) 10-100% of max IO, TP1, TP3 = 25ºC, VI = 53 V 23 ms start-up time (ts) - (from VI connection to 90% of VOi) 10-100% of max IO, TP1, TP3 = 25ºC, VI = 53 V 39 ms VI shut-down fall time (tf) - (from VI off to 10% of VO) max IO IO = 0 A, CO = 0 mF 3.6 ms s RC start-up time (tRC) max IO 27 ms RC shut-down fall time (tRC) - (from RC off to 10% of VO) max IO IO = 0 A, CO = 0 mF 5.1 ms s output current (IO) 0 35 A current limit threshold (Ilim) VO = 10.8 V, TP1, TP3 < max TP1, TP3 37 41 44 A short circuit current (Isc) TP1, TP3 = 25ºC, see Note 1 12 A recommended capacitive load (Cout) TP1, TP3 = 25ºC, see Note 2 0.1 3.5 6 mF output ripple & noise (VOac) See ripple & noise section, max IO , see Note 3 60 150 mVp-p over voltage protection (OVP) TP1, TP3 = 25°C, VI = 53 V, 10-100% of max IO 15.6 V remote control (RC) sink current (note 4), see operating information trigger level, decreasing RC-voltage trigger level, increasing RC-voltage 2.6 2.9 0.7 mA V V

cui.com date 02/20/2013 │ page 14 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics

12.45 V, 63 A / 747 W, two products in parallel

noitapissiD rewoP ycneiciffE 100 01 02 03 04 05 06 0[ A] [%] 36 V 48 V 53 V 75 V 01 02 03 04 05 06 0[ A] [W] 36 V 48 V 53 V 75 V Efficiency vs. load current and input voltage at TP1, TP3 = +25□C Dissipated power vs. load current and input voltage at TP1, TP3 = +25°C Output Characteristics Current Limit Characteristics 11.8 11.9 12.0 12.1 12.2 12.3 12.4 12.5 01 02 03 04 05 06 0[ A] [V] 36 V 48 V 53 V 75 V 3.0 5.0 7.0 9.0 11.0 13.0 63 65 67 69 71 73 75 77 79 81 83 [A] [V] 36 V 48 V 53 V 75 V Output voltage vs. load current at TP1, TP3 = +25°C Output voltage vs. load current at IO > max IO , TP1, TP3 = +25°C Start-up Output Load Transient Response Start-up enabled by connecting VI at: TP1, TP3 = +25°C, VI = 53 V, IO = 63 A resistive load. Top trace: output voltage (5 V/div.). Bottom trace: input voltage (50 V/div.). Time scale: (10 ms/div.). Output voltage response to load current step-change (15.8-47.3-15.8 A) at: TP1, TP3 =+25°C, VI = 53 V, CO = 3.5 mF. Top trace: output voltage (0.5 V/div.). Bottom trace: output current (20 A/div.). Time scale: (0.5 ms/div.).

cui.com date 02/20/2013 │ page 15 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics Output Current Derating – Open frame 02 04 06 08 01 00 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Output Current Derating – Base plate Thermal Resistance – Base plate 02 04 06 08 01 00 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. [°C/W] Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Thermal resistance vs. airspeed measured at the converter. Tested in wind tunnel with airflow and test conditions as per the Thermal consideration section. VI = 53 V. Output Current Derating – Base plate + Heat sink Output Current Derating – Cold wall sealed box 02 04 06 08 0 100 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. 02 04 06 08 01 00 [°C] A Tamb 85°C Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Tested with Plate Fin Transverse heatsink, height 0.23 In, P0114 Thermal Pad. Available load current vs. base plate temperature at 85ºC ambient. VI = 53 V. See Thermal Consideration section.

cui.com date 02/20/2013 │ page 16 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Electrical Specification

12.45 V, 39 A / 462 W

TP1, TP3 = -40 to +90ºC, VI = 40 to 60 V. Typical values given at: TP1, TP3 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions. Additional Cout = 3.9 mF, Configuration File: 19010-CDA 102 0314/017 Note 1: OCP in hic-up mode 2: Low ESR-value 3: Cout = 100 µF, external capacitance 4: Sink current drawn by external device connected to the RC pin. Minimum sink current required guaranteeing activated RC function. parameter conditions/description min typ max units input voltage range (VI) 40 60 V turn-off input voltage (VIoff) decreasing input voltage 36 37 38 V turn-on input voltage (VIon) increasing input voltage 38 39 40 V internal input capacitance (CI) 18 μF output power (PO) 0 462 W efficiency (η) 50% of max IO max IO 50% of max IO, VI = 48 V max IO, VI = 48 V 96.7 95.7 96.8 95.6 power dissipation (Pd) max IO 21.0 30.5 W input idling power (Pli) IO = 0 A, VI = 53 V 2.8 W input standby power (PRC) VI = 53 V (turned off with RC) 0.4 W switching frequency (fs) 0-100% of max IO 140 kHz output voltage setting and ac- curacy (VOi) TP1 = 25°C, VI = 53 V, IO = 0 A 12.415 12.45 12.485 V output voltage tolerance band (VO) 0-100% of max IO 11.5 12.7 V line regulation (VO) max IO 31 60 mV load regulation (VO) VI = 53 V, 0-100% of max IO 500 600 700 mV load transient voltage deviation (Vtr) VI = 53 V, load step 25-75-25% of max IO, di/dt = 1 A/μs ±0.4 V load transient recovery time (ttr) VI = 53 V, load step 25-75-25% of max IO, di/dt = ramp-up time (tr) - (from 10−90% of VOi) 10-100% of max IO, TP1 = 25ºC, VI = 53 V 23 ms start-up time (ts) - (from VI connection to 90% of VOi) 10-100% of max IO, TP1 = 25ºC, VI = 53 V 39 ms VI shut-down fall time (tf) - (from VI off to 10% of VO) max IO IO = 0 A, CO = 0 mF ms s RC start-up time (tRC) max IO 27 ms RC shut-down fall time (tRC) - (from RC off to 10% of VO) max IO IO = 0 A, CO = 0 mF 4.5 ms s output current (IO) 0 39 A current limit threshold (Ilim) VO = 10.8 V, TP1, TP3 < max TP1, TP3 41 44 47 A short circuit current (Isc) TP1 = 25ºC, see Note 1 14 A recommended capacitive load (Cout) TP1 = 25ºC, see Note 2 0.1 3.9 6 mF output ripple & noise (VOac) See ripple & noise section, max IO , see Note 3 50 110 mVp-p over voltage protection (OVP) TP1, TP3 = 25°C, VI = 53 V, 10-100% of max IO 15.6 V remote control (RC) sink current (note 4), see operating information trigger level, decreasing RC-voltage trigger level, increasing RC-voltage 2.6 2.9 0.7 mA V V

cui.com date 02/20/2013 │ page 17 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics

12.45 V, 70 A / 830 W, two products in parallel

noitapissiD rewoP ycneiciffE 100 01 02 03 04 05 06 07 0[ A] [%] 40 V 48 V 53 V 60 V 01 02 03 04 05 06 07 0 [A] [W] 40 V 48 V 53 V 60 V Efficiency vs. load current and input voltage at TP1, TP3 = +25□C Dissipated power vs. load current and input voltage at TP1, TP3 = +25°C Output Characteristics Current Limit Characteristics 11.8 11.9 12.0 12.1 12.2 12.3 12.4 12.5 01 02 03 04 05 06 07 0[ A] [V] 40 V 48 V 53 V 60 V 3.0 5.0 7.0 9.0 11.0 13.0 70 75 80 85 90 [A] [V] 40 V 48 V 53 V 60 V Output voltage vs. load current at TP1, TP3 = +25°C Output voltage vs. load current at IO > max IO , TP1, TP3 = +25°C Start-up Output Load Transient Response Start-up enabled by connecting VI at: TP1, TP3 = +25°C, VI = 53 V, IO = 70 A resistive load. Top trace: output voltage (5 V/div.). Bottom trace: input voltage (50 V/div.). Time scale: (10 ms/div.). Output voltage response to load current step-change (17.5-52.5-17.5 A) at: TP1, TP3 =+25°C, VI = 53 V, CO = 3.9 mF Top trace: output voltage (0.5 V/div.). Bottom trace: output current (20 A/div.). Time scale: (0.5 ms/div.).

cui.com date 02/20/2013 │ page 18 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Typical Characteristics Output Current Derating – Open frame 02 04 06 08 0 100 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Output Current Derating – Base plate Thermal Resistance – Base plate 02 04 06 08 01 00 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. [°C/W] Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Thermal resistance vs. airspeed measured at the converter. Tested in wind tunnel with airflow and test conditions as per the Thermal consideration section. VI = 53 V. Output Current Derating – Base Plate + Heat sink Output Current Derating – Cold wall sealed box 02 04 06 08 01 00 [°C] [A] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s Nat. Conv. 02 04 06 08 01 00 [°C] A Tamb 85°C Available load current vs. ambient air temperature and airflow at VI = 53 V. See Thermal Consideration section. Tested with Plate Fin Transverse heatsink, height 0.23 In, P0114 Thermal Pad. Available load current vs. base plate temperature at 85ºC ambient. VI = 53 V. See Thermal Consideration section.

cui.com date 02/20/2013 │ page 19 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Layout recommendations The radiated EMI performance of the product will depend on the PWB layout and ground layer design. It is also important to consider the stand-off of the product. If a ground layer is used, it should be connected to the output of the product and the equipment ground or chassis. A ground layer will increase the stray capacitance in the PWB and improve the high frequency EMC performance. Output ripple and noise Output ripple and noise measured according to figure below. Operating information Power Management Overview This product includes protection features that continuously safeguard the load from damage due to unexpected system faults. Input Voltage The NQB consists of two different product families designed for two different input voltage ranges, 36 to 75 Vdc and 40 to 60 Vdc, see ordering information. The input voltage range 36 to 75 Vdc meets the requirements of the European Telecom Standard ETS 300 132-2 for normal input voltage range in –48 and EMC Specification Conducted EMI measured according to EN55022, CISPR 22 and FCC part 15J (see test set-up). The fundamental switching frequency is 140 kHz for NQB at VI = 53 V, max IO. Conducted EMI Input terminal value (typ) Optional external filter for class B Suggested external input filter in order to meet class B in EN 55022, CISPR 22 and FCC part 15J. EMI without filter C1 C2 C3 R Module Filter components: C1 = 1 μF C2 = 1 μF+220 μF C3 = 1 μF+220 μF C4,C5 = 2.2 nF L1 = 810 μH L2 = 810 μH EMI with filter Test set-up Output ripple and noise test setup

cui.com date 02/20/2013 │ page 20 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS –60 Vdc systems, -40.5 to -57.0 V and –50.0 to -72 V respectively. At input voltages exceeding 75 V, the power loss will be higher than at normal input voltage and TP1 must be limited to absolute max +125°C. The absolute maximum continuous input voltage is 80 Vdc. The input voltage range 40 to 60 Vdc meets the requirements for normal input voltage range in -48 V systems, -40.5 to -57.0 V. At input voltages exceeding

60 V, the power loss will be higher than at normal input

voltage and TP1 must be limited to absolute max +125°C. The absolute maximum continuous input voltage is 65 Vdc. Turn-off Input Voltage The product monitors the input voltage and will turn on and turn off at predetermined levels. The minimum hysteresis between turn on and turn off input voltage is 2 Remote Control (RC) The products are fitted with a remote control function. The remote control is referenced to the primary negative input connection (-In). The RC function allows the converter to be turned on/off by an external device like a semiconductor or mechanical switch. The RC pin has an internal pull up resistor. The device should be capable of sinking 0.7 mA. When the RC pin is left open, the voltage generated on the RC pin is max 6 V. The product is provided with “negative logic” remote control and will be off until the RC pin is connected to the -In. To turn on the product the voltage between RC pin and -In should be less than 1 V. To turn off the product the RC pin should be left open for a minimum of time 150 µs, the same time requirement applies when the product shall turn on. In situations where it is desired to have the product to power up automatically without the need for control signals or a switch, the RC pin can be wired directly to –In Input and Output Impedance The impedance of both the input source and the load will interact with the impedance of the product. It is important that the input source has low characteristic impedance. Minimum recommended external input capacitance is 100 µF. The performance in some applications can be enhanced by addition of external capacitance as described under External Decoupling Capacitors. External Decoupling Capacitors When powering loads with significant dynamic current requirements, the voltage regulation at the point of load can be improved by addition of decoupling capacitors at the load. The most effective technique is to locate low ESR ceramic and electrolytic capacitors as close to the load as possible, using several parallel capacitors to lower the effective ESR. The ceramic capacitors will handle high- frequency dynamic load changes while the electrolytic capacitors are used to handle low frequency dynamic load changes. Ceramic capacitors will also reduce any high frequency noise at the load. It is equally important to use low resistance and low inductance PWB layouts and cabling. External decoupling capacitors will become part of the product’s control loop. The control loop is optimized for a wide range of external capacitance and the maximum recommended value that could be used without any additional analysis is found in the electrical specification. The ESR of the capacitors is a very important parameter. Stable operation is guaranteed with a verified ESR value of >10 mΩ across the output connections. For further information please contact your local CUI Power Modules representative. Parallel Operation (Droop Load Share, DLS) The NQB, DLS products are variants that can be connected in parallel. The products have a pre-configured voltage droop: The stated output voltage set point is at no load. The output voltage will decrease when the load current is increased. The voltage will droop 0.6 V while load reaches max load. This feature allows the products to be connected in parallel and share the current with 10% accuracy. Up to 90% of max output current can be used from each product. Feed Forward Capability The NQB products have a feed forward function implemented that can handle sudden input voltage changes. The output voltage will be regulated during an input transient and will typically stay within 10% when an input transient is applied. Soft-start Power Up The rise time of the ramp up is 10 ms. When starting by applying input voltage the control circuit boot-up time adds an additional 15 ms delay. The DLS variants have a pre-configured ramp up time of 25 ms. Temperature Protection (OTP, UTP) The products are protected from thermal overload by an internal temperature shutdown protection. When TP1 as defined in thermal consideration section is exceeded the product will shut down. The product will make continuous attempts to start up and resume normal operation Voltage regulation DLS products 11.6 11.8 12.0 12.2 12.4 12.6 12.8 01 02 03 04 05 06 07 0 Output Current [A] Output Voltage [V] Module 1 Module 2 Module 1+2

cui.com date 02/20/2013 │ page 21 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS automatically when the temperature has dropped below the temperature threshold; the hysteresis is defined in general electrical specification. The product has also an under temperature protection. Over Voltage Protection (OVP) The product includes over voltage limiting circuitry for protection of the load. The OVP limit is 30% above the nominal output voltage. The response from an over voltage fault is to immediately shut down. The device will continuously check for the presence of the fault condition, and when the fault condition no longer exists the device will be re-enabled. Over Current Protection (OCP) The product includes current limiting circuitry for protection at continuous overload. The setting for the product is hic-up mode if the maximum output current is exceeded and the output voltage is below 0.3×Vout. Above the trip voltage the product will continue operate while maintaining the output current at the maximum output current. The load distribution should be designed for the maximum output short circuit current specified. Droop Load Share variants (DLS) will enter hic-up mode, with a trip voltage, 0.04×Vout. Above the trip voltage the product will continue to operate while maintaining the output current at the maximum output current Input Over/Under voltage protection The input of the product is protected from high input voltage and low input voltage. Pre-bias Start-up Capability The product has a Pre-bias start up functionality and will not sink current during start up if a Pre-bias source is present at the output terminals. If the Pre-bias voltage is lower than the target value, the product will ramp up to the target value. If the Pre-bias voltage is higher than the target value, the product will ramp down to the target value and in this case sink current for a limited time. Output Voltage Regulation The NQB products are designed to be fully regulated within the plotted area. Operating outside this area is not recommended. Thermal Consideration General The product is designed to operate in different thermal environments and sufficient cooling must be provided to ensure reliable operation. For products mounted on a PWB without a heat sink attached, cooling is achieved mainly by conduction, from the pins to the host board, and convection, which is dependant on the airflow across the product. Increased airflow enhances the cooling of the product. The Output Current Derating graph found in the output section for each model provides the available output current vs. ambient air temperature and air velocity at VI =53 V. The product is tested on a 254 x 254 mm, 35 µm (1 oz), 16-layer test board mounted vertically in a wind tunnel with a cross-section of 608 x 203 mm. For products with base plate used in a sealed box/cold wall application, cooling is achieved mainly by conduction through the cold wall. The Output Current Derating graphs are found in the output section for each model. The product is tested in a sealed box test set up with ambient temperatures 85, 55 and 25°C. 12.0 12.2 12.4 12.6 12.8 13.0 13.2 13.4 35 45 55 65 75 Vin [V] Vout [V] Vin range: 36-75Vdc 12.0 12.2 12.4 12.6 12.8 13.0 13.2 13.4 35 40 45 50 55 60 65 Vin [V] Vout [V] Vin range:40-60Vdc

cui.com date 02/20/2013 │ page 22 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Definition of product operating temperature The product operating temperature is used to monitor the temperature of the product, and proper thermal conditions can be verified by measuring the temperature at positions P1, P2, P3 and P4. The temperature at these positions (TP1, TP2, TP3, TP4) should not exceed the maximum temperatures in the table below. The number of measurement points may vary with different thermal design and topology. Temperatures above maximum TP1, measured at the reference point P1 (TP3 / P3 for base plate versions) are not allowed and may cause permanent damage. (Best air flow direction is from positive to negative pins.) Ambient Temperature Calculation For products with base plate the maximum allowed ambient temperature can be calculated by using the thermal resistance. 1. The power loss is calculated by using the formula ((1/η) - 1) × output power = power losses (Pd). η = efficiency of product. E.g. 95 % = 0.95 2. Find the thermal resistance (Rth) in the Thermal Resistance graph found in the Output section for each model. Note that the thermal resistance can be significantly reduced if a heat sink is mounted on the top of the base plate. Calculate the temperature increase (ΔT). ΔT = Rth x Pd 3. Max allowed ambient temperature is: Max TP1 - ΔT. E.g. NQB-468 at 2m/s: 3. 125 °C - 69.0°C = max ambient temperature is 56°C The actual temperature will be dependent on several factors such as the PWB size, number of layers and direction of airflow. Connections (Top view) Position Description Max temperature P1 PWB (reference point, open frame) TP1=125º C P2 Opto-coupler TP2=105º C P3 PWB (reference point for base-plate version) TP3=125º C P4 Primary MOSFET TP4=125º C Top view Bottom view Pin Designation Function 1 +In Positive Input

2 RC Remote Control

3 Case Case to GND (optional)

cui.com date 02/20/2013 │ page 23 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Mechanical Information - Hole Mount, Open Frame Version Top View Pin Positions According To Recommended Footprint Recommended Footprint - Top View Recommended keep away area for user components. The stand-off in combination with insulating material ensures that requirements as per IEC/EN/UL60950 are met and 2250 V isolation maintained even if open vias or traces are present under the DC/DC converter. Weight: Typical 48 g All dimensions: mm [inch] Tolerances: x.x ±0.50 [0.02] x.xx ±0.25 [0.01] (not applied on footprint or typical values) PIN SPECIFICATIONS Pin 1, 2, 4, 5 & 16 Material: Copper alloy Plating: Min Au 0.1 µm over 1-3 µm Ni. Pin position 3 is only used for base plate GND connection which is not available on this module. Table 1. X1 = Ordering information

cui.com date 02/20/2013 │ page 24 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Mechanical Information - Hole Mount, Base Plate Version Top View Pin Positions According To Recommended Footprint Recommended Footprint - Top View Recommended keep away area for user components. The stand-off in combination with insulating material ensures that requirements as per IEC/EN/UL60950 are met and 2250 V isolation maintained even if open vias or traces are present under the DC/DC converter. Weight: Typical 68 g All dimensions: mm [inch] Tolerances: x.x ±0.50 [0.02] x.xx ±0.25 [0.01] (not applied on footprint or typical values) CASE Material: Aluminum For screw attachment apply mounting torque of max 0.44 Nm [3.9 lbf in]. M3 screws must not protrude more than 2.7mm [0.106] into the base plate. PIN SPECIFICATIONS Pin 1, 2, 3, 4, 5 & 16 Material: Copper alloy Plating: Min Au 0.1 µm over 1-3 µm Ni. Pin position 3 is only used for base plate GND connection. Table 1. X1 = Ordering information

cui.com date 02/20/2013 │ page 25 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Mechanical Information - Surface Mount Version Top View Pin Positions According To Recommended Footprint Recommended Footprint - Top View Recommended keep away area for user components. The stand-off in combination with insulating material ensures that requirements as per IEC/EN/UL60950 are met and 2250 V isolation maintained even if open vias or traces are present under the DC/DC converter. Weight: Typical 46 g All dimensions: mm [inch] Tolerances: x.x ±0.50 [0.02] x.xx ±0.25 [0.01] (not applied on footprint or typical values) PIN SPECIFICATIONS Pin 1, 2, 4, 5 & 16 Material: Copper alloy Plating: Min Au 0.1 µm over 1-3 µm Ni.

cui.com date 02/20/2013 │ page 26 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Soldering Information - Surface Mounting Minimum Pin Temperature Recommendations The surface mount product is intended for forced convection or vapor phase reflow soldering in SnPb and Pb-free processes. The reflow profile should be optimised to avoid excessive heating of the product. It is recommended to have a sufficiently extended preheat time to ensure an even temperature across the host PWB and it is also recommended to minimize the time in reflow. A no-clean flux is recommended to avoid entrapment of cleaning fluids in cavities inside the product or between the product and the host board, since cleaning residues may affect long time reliability and isolation voltage. Average ramp-up (TPRODUCT)3 °C/s max3 °C/s max Typical solder melting (liquidus) temperature T1 83°CL 221°C Minimum reflow time above TL 60 s6 0 s Minimum pin temperatureT 210°CPIN 235°C Peak product temperatureT 225°CPRODUCT 260°C Average ramp-down (TPRODUCT)6 °C/s max6 °C/s max Maximum time 25°C to peak 6 minutes 8 minutes TPRODUCT maximum TPIN minimum Time niP profile Product profile TL Time in reflow Time in preheat / soak zone Time 25°C to peak Temperature General reflow process specifications SnPb eutectic Pb-free Pin number 5 chosen as reference location for the minimum pin temperature recommendation since this will likely be the coolest solder joint during the reflow process. SnPb solder processes For SnPb solder processes, a pin temperature (TPIN) in excess of the solder melting temperature, (TL, 183°C for Sn63Pb37) for more than 60 seconds and a peak temperature of 220°C is recommended to ensure a reliable solder joint. For dry packed products only: depending on the type of solder paste and flux system used on the host board, up to a recommended maximum temperature of 245°C could be used, if the products are kept in a controlled environment (dry pack handling and storage) prior to assembly. Lead-free (Pb-free) solder processes For Pb-free solder processes, a pin temperature (TPIN) in excess of the solder melting temperature (TL, 217 to 221°C for SnAgCu solder alloys) for more than 60 seconds and a peak temperature of 245°C on all solder joints is recommended to ensure a reliable solder joint. Maximum Product Temperature Requirements Top of the product PWB near pin 2 is chosen as reference location for the maximum (peak) allowed product temperature (TPRODUCT) since this will likely be the warmest part of the product during the reflow process. SnPb solder processes For SnPb solder processes, the product is qualified for MSL 1 according to IPC/JEDEC standard J STD 020C. During reflow TPRODUCT must not exceed 225 °C at any time. Pb-free solder processes For Pb-free solder processes, the product is qualified for MSL 3 according to IPC/JEDEC standard J-STD-020C. During reflow TPRODUCT must not exceed 260 °C at any time. Dry Pack Information Products intended for Pb-free reflow soldering processes are delivered in standard moisture barrier bags according to IPC/JEDEC standard J STD 033 (Handling, packing, shipping and use of moisture/reflow sensitivity surface mount devices). Using products in high temperature Pb-free soldering processes requires dry pack storage and handling. In case the products have been stored in an uncontrolled environment and no longer can be considered dry, the modules must be baked according to J STD 033. Thermocoupler Attachment Top of PWB near pin 2 for measurement of maximum product temperature, TPRODUCT Pin 5 for measurement of minimum pin (solder joint ) temperature, TPIN

cui.com date 02/20/2013 │ page 27 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Soldering Information - Hole Mounting The hole mounted product is intended for plated through hole mounting by wave or manual soldering. The pin temperature is specified to maximum to 270°C for maximum 10 seconds. A maximum preheat rate of 4°C/s and maximum preheat temperature of 150°C is suggested. When soldering by hand, care should be taken to avoid direct contact between the hot soldering iron tip and the pins for more than a few seconds in order to prevent overheating. A no-clean flux is recommended to avoid entrapment of cleaning fluids in cavities inside the product or between the product and the host board. The cleaning residues may affect long time reliability and isolation voltage. Delivery Package Information The products are delivered in antistatic injection molded trays (Jedec design guide 4.10D standard) and in antistatic trays. Tray Specifications –S MD Material Antistatic PPE Surface resistance 105 < Ohm/square < 10 Bakability The trays can be baked at maximum 125°C for 48 hours Tray thickness 14.50m m0 .571 [i nch] Box capacity 20 products (2 full trays/box) Tray weight 125g empty, 574g full tray JEDEC standard tray for 2x5 = 10 products. All dimensions in mm [inch] Note: pick up positions refer to center of pocket. See mechanical drawing for exact location on product.

cui.com date 02/20/2013 │ page 28 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS resistance Bakability The trays are not bakeable Tray capacity 20 converters/tray Box capacity 20 products (1 full tray/box) Weight Product –O pen frame 1100 g full tray, 140g empty tray Product –B ase plate option 1480 g full tray, 140 g empty tray Material PE Foam Surface 105 < Ohm/square < 1012 Tray Specifications - TH

cui.com date 02/20/2013 │ page 29 of 30 CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS Product Qualification Specification Characteristics External visual inspection IPC-A-610 Change of temperature (Temperature cycling) IEC 60068-2-14 Na Temperature range Number of cycles Dwell/transfer time -40 to 100°C 500 15 min/0-1 min Cold (in operation) IEC 60068-2-1 Ad Temperature T Duration A -45°C 72 h Damp heat IEC 60068-2-67 Cy Temperature Humidity Duration 85°C 85 % RH 1000 hours Dry heat IEC 60068-2-2B d Temperature Duration 125°C 1000 h Electrostatic discharge susceptibility IEC 61340-3-1, JESD 22-A114 IEC 61340-3-2, JESD 22-A115 Human body model (HBM) Machine Model (MM) Class 2, 2000 V Class 3, 200 V Immersion in cleaning solventsI EC 60068-2-45 XA, method 2 Water Glycol ether Isopropyl alcohol 55°C 35°C 35°C Mechanical shockI EC 60068-2-27 Ea Peak acceleration Duration 100 g 6 ms Moisture reflow sensitivity J-STD-020C1 Level 1 (SnPb-eutectic) Level 3 (Pb Free) 225°C 260°C Operational life test MIL-STD-202G, method 108AD uration 1000 h Resistance to soldering heat IEC 60068-2-20 Tb, method 1A2 Solder temperature Duration 270°C 10-13 s Robustness of terminations IEC 60068-2-21 Test Ua1 IEC 60068-2-21 Test Ue1 Through hole mount products Surface mount products All leads All leads Solderability IEC 60068-2-58 test Td 1 IEC 60068-2-20 test Ta Preconditioning Temperature, SnPb Eutectic Temperature, Pb-free Preconditioning Temperature, SnPb Eutectic Temperature, Pb-free 150°C dry bake 16 h 215°C 235°C Steam ageing 235°C 245°C Vibration, broad band randomI EC 60068-2-64 Fh, method 1 Frequency Spectral density Duration 10 to 500 Hz 0.07 g2 10 min in each direction /Hz Notes: 1. Only for products intended for reflow soldering (surface mount products) 2. Only for products intended for wave soldering (plated through hole products)

CUI Inc │ SERIES: NQB-N │ DESCRIPTION: FULLY REGULATED ADVANCED BUS CONVERTERS date 02/20/2013 │ page 30 of 30 Novum is a trademark of CUI. All other trademarks are the property of their respective owners. CUI offers a two (2) year limited warranty. Complete warranty information is listed on our website. CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use. CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. Headquarters 20050 SW 112th Ave. Tualatin, OR 97062 800.275.4899 Fax 503.612.2383 cui.com techsupport@cui.com rev. description date 1.0 initial release 02/20/2013 The revision history provided is for informational purposes only and is believed to be accurate.

REVISION HISTORY