LSN2

LSN2 CANDD | Alldatasheet

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Non-isolated, DOSA-SIP , 6/10/16A Selectable-Output DC/DC Converters LSN2 Series Page 1 of 14www.cd4power.com ORDERING GUIDE SUMMARY Model V OUT Range I OUT Range V IN Range Ripple/Noise Effi ciency LSN2-T/6-W3 0.75-3.3V 0-6A 2.4-5.5V 15mVp-p 94% LSN2-T/6-D12 0.75-5V 0-6A 8.3-14V 15mVp-p 95% LSN2-T/10-W3 0.75-3.3V 0-10A 2.4-5.5V 15mVp-p 95% LSN2-T/10-D12 0.75-5V 0-10A 8.3-14V 30mVp-p 95% LSN2-T/16-W3 0.75-3.3V 0-16A 2.4-5.5V 25mVp-p 95% LSN2-T/16-D12 0.75-5V 0-16A 8.3-14V 30mVp-p 94% MECHANICAL CHARACTERISTICS INPUT CHARACTERISTICS Parameter Typ. @ 25°C, full load Notes Voltage Range 2.4-5.5 or 8.3-14V 5V or 12V nominal models Current, full power 4.22 to 11.12A Model dependent Undervoltage Shutdown Included With autorestart hysteresis Short Circuit Current 60mA Output is short circuited Remote On/Off Control Positive or negative polarity Default polarity is positive OUTPUT CHARACTERISTICS Parameter Typ. @ 25°C, full load Notes Voltage 0.75-3.3 or 0.75-5V User adjustable, model dependent Current 0-6, 0-10 or 0-16A Three ranges, model dependent Power Dissipation 20, 33, 52W max. Three values, model dependent Accuracy ±2% of VNOM 50% load Ripple & Noise 15-75mVpp Model dependent Line and Load Regulation ±0.03% Overcurrent Protection Hiccup autorecovery Continuous short circuit protection Overtemperature Protection +115°C shutdown Effi ciency (minimum) 92-93% Model dependent Effi ciency (typical) 94-95% Model dependent GENERAL SPECIFICATIONS Parameter Typ. @ 25°C, full load Notes Transient Response 25μsec 50% load step to 2% of fi nal value Operating Temperature Range –40 to +85°C With 200 lfm airfl ow Safety UL/IEC/EN 60950 And CSA C22.2-No.234 EMI FCC pt.15, class B Pb Lead-free construction/attach

FEATURES

■ User-selectable outputs: 0.75-5V (D12 models) or 0.75-3.3V (W3 models) ■ 6, 10 or 16A maximum output current ■ Double lead free to RoHS standards ■ Selectable phased start-up sequencing and tracking ■ Wide range VIN 8.3-14V or 2.4-5.5V ■ Up to 52 Watts total output power ■ Very high effi ciency up to 95% ■ Starts up into pre-biased load ■ Fast settling, high di/dt IOUT slew rate

DESCRIPTION

These miniature point-of-load (POL) switching DC/DC converters are ideal regulation and supply elements for distributed power and intermedi- ate bus architectures. Fully compatible with the Distributed-power Open Standards Alliance specifi cation (www.dosapower.com), LSN2’s can power CPU’s, programmable logic and mixed- voltage systems with little heat and low noise. A typical application uses a master isolated 12 or 5Vdc supply and individual LSN2 converters for local 1.8 and 3.3Vdc supplies. All system isolation resides in the central supply, leaving lower cost POL regulation at the load. The LSN2’s can deliver very high power (to 52 Watts) in a tiny area with- out heat sinking or external components. They feature quick transient response (to 25μsec) and very fast current slew rates (to 20A/μsec).

Non-isolated, DOSA-SIP , 6/10/16A Selectable-Output DC/DC Converters LSN2 Series Page 2 of 14www.cd4power.com PART NUMBER STRUCTURE PERFORMANCE SPECIFICATIONS AND ORDERING GUIDE ➀ Model Output Input Effi ciency Package (Case/ Pinout) VOUT (Volts) IOUT (Amps) Power (Watts) R/N (mVp-p) ➁ Regulation ➂ VIN Nom. (Volts) Range ➄ (Volts) IIN ➃ (mA/A)Typ. Max. Line Load Min. Typ. Maximum Rated Output Current in Amps Non-Isolated SMT Output Confi guration: L = Unipolar Low Voltage Nominal Output Voltage: 0.75-3.3 Volts (W3) 0.75-5 Volts (D12) L SN2 - / D12-T 16 N G Input Voltage Range: D12 = 8.3-14 Volts (12V nominal) W3 = 2.4-5.5 Volts (5V nominal) On/Off Polarity: Blank = Positive polarity N = Negative polarity Power Good Output: Blank = Omitted G = Installed ➀ Typical at TA = +25°C under nominal line voltage and full-load conditions, unless noted. All models are tested and specifi ed with external 22μF tantalum input and output capacitors. These capacitors are necessary to accommodate our test equipment and may not be required to achieve specifi ed performance in your applications. See I/O Filtering and Noise Reduction. ➁ Ripple/Noise (R/N) is tested/specifi ed over a 20MHz bandwidth and may be reduced with external fi ltering. See I/O Filtering and Noise Reduction for details. ➂ These devices have no minimum-load requirements and will regulate under no-load conditions. Regulation specifi cations describe the output-voltage deviation as the line voltage or load is varied from its nominal/midpoint value to either extreme. ➃ Nominal line voltage, no-load/full-load conditions. ➄ V IN must be ≥0.5V greater than VOUT. ➅ LSN2-TXX-D12 effi ciencies are shown at 5VOUT. Note: Not all model number combinations are available. Contact C&D Technologies (DATEL). C RoHS-6 compliant* *Contact C&D Technologies (DATEL) for availability.

Non-isolated, DOSA-SIP , 6/10/16A Selectable-Output DC/DC Converters LSN2 Series Page 3 of 14www.cd4power.com Performance/Functional Specifi cations (1) INPUT Input Voltage Range See Ordering Guide Isolation Not isolated, input and output commons are internally connected Start-Up Threshold W3 Models 2.2 Volts 12V Models 8 Volts Undervoltage Shutdown W3 Models 2.0 Volts 12V Models 7.5 Volts Overvoltage Shutdown None Refl ected (Back) Ripple Current (2) 10-70mAp-p (model dependent) Internal Input Filter Type Capacitive Reverse Polarity Protection See fuse information Input Current: Full Load Conditions See Ordering Guide Inrush Transient 0.1A 2sec Shutdown Mode (Off, UV, OT) 5mA Output Short Circuit 60mA No Load W3 models 50mA 12V models 100mA Low Line (V IN = VMIN) LSN2-T/6-W3 5.54 Amps LSN2-T/6-D12 3.85 Amps LSN2-T/10-W3 9.14 Amps LSN2-T/10-D12 6.31 Amps LSN2-T/16-W3 14.63 Amps LSN2-T/16-D12 10.2 Amps Remote On/Off Control: (5) Positive Logic (no model suffi x) OFF = ground pin to +0.8V max. ON = open pin or +2.5V min. to +V IN max. Negative Logic (“N” model suffi x) ON = open pin to +0.3V max. OFF = +2.5V min. to +V IN max. Current 1mA max. OUTPUT Voltage Output Range See Ordering Guide Minimum Loading No minimum load Accuracy (50% load) ±2% of V NOM Voltage Adjustment Range (13) See Ordering Guide Temperature Coeffi cient ±0.02% of V OUT range per °C Ripple/Noise (20 MHz bandwidth) See Ordering Guide and (8) Line/Load Regulation (See Tech Notes) See Ordering Guide and (10) Effi ciency See Ordering Guide Maximum Capacitive Loading: (15) LSN2-T/6 models: Cap-ESR = 0.001 to 0.01 Ω 3000μF Cap-ESR >0.01 Ω 5000μF LSN2-T/10 and -T/16 models: Cap-ESR = 0.001 to 0.01 Ω 5000μF Cap-ESR >0.01 Ω 10,000μF Current Limit Inception: (98% of V OUT) LSN2-T/6 models 11-13 Amps (cold startup)

11 Amps (after warm up)

LSN2-T/10 models 18.75 Amps (cold startup)

16.75 Amps (after warm up)

LSN2-T/16 models 24 Amps (cold startup)

21 Amps (after warm up)

(6) Short Circuit Current Output 600mA Protection Method (17) Hiccup autorecovery on overload removal Short Circuit Duration Continuous, no damage (output shorted to ground) Prebias Startup (16) Converter will start up if the external output voltage is less than V NOM Sequencing Slew Rate 2V max. per millisecond Startup delay until sequence start 10 milliseconds Tracking accuracy, rising input V OUT = ±100mV of Sequence In Tracking accuracy, falling input V OUT = ±200mV of Sequence In Sequence pin input impedance 400k Ω to 1MΩ Remote Sense to VOUT 0.5V max. (7) Power Good Output (14) TRUE (OK) = open drain (“G” suffi x) FALSE (not OK) = Signal Ground to 0.4V Power_Good Confi guration MOSFET to ground with external user pullup, 10mA max. sink DYNAMIC CHARACTERISTICS Dynamic Load Response 25μsec to ±2% of fi nal value (50-100-50% load step, di/dt = 20A/msec) Start-Up Time 4-7msec for V OUT = nominal (V IN on to VOUT regulated or On/Off to VOUT) Switching Frequency LSN2-T/6 models 315kHz LSN2-T/10 and -T/16 models 230kHz ENVIRONMENTAL Calculated MTBF (4) TBC Hours Operating Temperature Range (Ambient) No derating, natural convection –40 to +63°C, vertical mount, 2.5V OUT (9) With derating See Derating Curves Operating PC Board Temperature –40 to +100°C max. (12) Storage Temperature Range –55 to +125°C Thermal Protection/Shutdown +115°C Density Altitude 0 to 10,000 feet Relative Humidity 10% to 90%, non-condensing PHYSICAL Outline Dimensions See Mechanical Specifi cations Removable Heat Shield Nylon 46 Weight 0.28 ounces (7.8 grams) Electromagnetic Interference FCC part 15, class B, EN55022 (may (conducted and radiated) need external fi lter) Safety UL/cUL 60950 CSA-C22.2 No.234 IEC/EN 60950 Flammability Rating UL94V-0 ABSOLUTE MAXIMUM RATINGS Input Voltage (Continuous or transient) W3 models +7 Volts 12V models +15 Volts On/Off Control –0.3V min. to +V IN max. Input Reverse Polarity Protection See Fuse section Output Current (7) Current-limited. Devices can withstand sustained short circuit without damage. Storage Temperature –55 to +125°C Lead Temperature (soldering 10 sec. max.) +280°C These are stress ratings. Exposure of devices to any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Perfor- mance/Functional Specifi cations Table is not implied.

Figure 1. LSN2 Series Simplifi ed Schematic nal” output voltage is +5V for D12 models and +3.3V for W3 models. CIN = 2 x 100μF tantalum, CBUS = 1000μF electrolytic, LBUS = 1μH. (3) Note that Maximum Power Derating curves indicate an average current at nominal input voltage. outputs if the total RMS current over time does not exceed the derating curve. ground fi xed conditions, TPCBOARD = +25°C, full output load, natural air convection. resistor to +VIN will cause the “ON” state for negative logic models. mately 2% from the selected setting. drop may cause the converter to exceed maximum power dissipation. varied from a nominal midpoint value to either extreme. (11) Other input or output voltage ranges are available under scheduled quantity special order. (12) Maximum PC board temperature is measured with the sensor in the center. (13) Do not exceed maximum power specifi cations when adjusting the output trim. Good does not directly detect Over Current. reaches its setpoint. Ignore Power Good if Sequencing is in transition. the external output capacitor. (16) Do not use Pre-bias startup and sequencing together. See Technical Notes below. overcurrent (OC) detection, the converter will remain in hiccup restart mode. (18) For best noise performance, leave the Track/Sequence pin OPEN when not used. output capacitors are specifi ed for low ESR and full-range frequency response. fi ltering techniques, the simplest being the installation of external I/O caps. (at appropriate frequencies), low ESR, and high rms-ripple-current ratings. confi guration may necessitate additional considerations.

Non-isolated, DOSA-SIP , 6/10/16A Selectable-Output DC/DC Converters LSN2 Series Page 7 of 14www.cd4power.com Solutions To improve start up, review the conditions above. One of the better solutions is to place a moderate size capacitor very close to the input terminals. You may need two parallel capacitors. A larger electrolytic or tantalum cap sup- plies the surge current and a smaller parallel low-ESR ceramic cap gives low AC impedance. Too large an electrolytic capacitor may have higher internal impedance (ESR) and/or lower the start up slew rate enough to upset the DC/DC’s controller. Make sure the capacitors can tolerate refl ected switching current pulses from the converter. The capacitors will not help if the input source has poor regulation. A con- verter which starts successfully at 3.3 Volts will turn off if the input voltage decays to below the input voltage theshold, regardless of external capaci- tance. Increase the input start up voltage if possible to raise the downward voltage spike. Also, make sure that the input voltage ramps up in a reasonably short time (less than a few milliseconds). If possible, move the input source closer to the converter to reduce ohmic losses in the input wiring. Remember that the input current is carried both by the wiring and the ground plane return. Make sure the ground plane uses adequate thickness copper. Run additional bus wire if necessary. Any added output capacitor should use just enough capacitance (and no more) to reduce output noise at the load and to avoid marginal threshold noise prob- lems with external logic. An output cap will also “decouple” inductive reac- tance in the load. Certain kinds of electronic loads include “constant current” characteristics which destabilize the output with insuffi cient capacitance. If the wiring to the eventual load is long, consider placing this decoupling cap at the load. Use the Remote Sense input to avoid ohmic voltage drop errors. An elegant solution to start up problems is to apply the input voltage with the Remote On/Off control fi rst in the off setting (for those converters with an On/ Off Control). After the specifi ed start-up delay (usually under 20 mSec), turn on the converter. The controller will have already been stabilized. The short delay will not be noticed in most applications. Be aware of applications which need “power management” (phased start up). Finally, it is challenging to model some application circuits with absolute fi del- ity. How low is the resistance of your ground plane? What is the inductance (and distributed capacitance) of external wiring? Even a detailed mathemati- cal model may not get all aspects of your circuit. Therefore it is diffi cult to give cap values which serve all applications. Some experimentation may be required. Pre-Biased Startup Newer systems with multiple power voltages have an additional problem besides startup sequencing. Some sections have power already partially applied (possibly because of earlier power sequencing) or have leakage power present so that the DC/DC converter must power up into an existing voltage. This power may either be stored in an external bypass capacitor or supplied by an active source. This “pre-biased” condition can also occur with some types of program- mable logic or because of blocking diode leakage or small currents passed through forward biased ESD diodes. Conventional DC/DC’s may fail to start up correctly if there is output voltage already present. And some external circuits are adversely affected when the low side MOSFET in a synchronous rectifi er converter sinks current at start up. The highest temperatures in LSN2 SIPs occur at their output inductor, whose heat is generated primarily by I 2R losses. The derating curves were developed using thermocouples to monitor the inductor temperature and varying the load to keep that temperature below +110°C under the assorted conditions of air fl ow and air temperature. Once the temperature exceeds +115°C (approx.), the thermal protection will disable the converter. Automatic restart occurs after the temperature has dropped below +110°C. As you may deduce from the derating curves and observe in the effi ciency curves on the following pages, LSN2 SIPs maintain virtually constant effi ciency from half to full load, and consequently deliver very impressive temperature performance even if operating at full load. Lastly, when LSN2 SIPs are installed in system boards, they are obviously subject to numerous factors and tolerances not taken into account here. If you are attempting to extract the most current out of these units under demand- ing temperature conditions, we advise you to monitor the output-inductor temperature to ensure it remains below +110°C at all times. Start Up Considerations When power is fi rst applied to the DC/DC converter, operation is different than when the converter is running and stabilized. There is some risk of start up diffi culties if you do not observe several application features. Lower output voltage converters may have more problems here since they tend to have higher output currents. Operation is most critical with any combination of the following external factors: 1 - Low initial input line voltage and/or poor regulation of the input source. 2 – Full output load current on lower output voltage converters. 3 – Slow slew rate of input voltage. 4 – Longer distance to input voltage source and/or higher external input source impedance. 5 - Limited or insuffi cient ground plane. External wiring that is too small. 6 – Too small external input capacitance. Too high ESR. 7 – High output capacitance causing a start up charge overcurrent surge. 8 – Output loads with excessive inductive reactance or constant current characteristics. If the input voltage is already at the low limit before power is applied, the start up surge current may instantaneously reduce the voltage at the input terminals to below the specifi ed minimum voltage. Even if this voltage depres- sion is very brief, this may interfere with the on-board controller and possibly cause a failed start. Or the converter may start but the input current load will now drive the input voltage below its running low limit and the converter will shut down. If you measure the input voltage before start up with a Digital Voltmeter (DVM), the voltage may appear to be adequate. Limited external capacitance and/or too high a source impedance may cause a short downward spike at power up, causing an instantaneous voltage drop. Use an oscilloscope not a DVM to observe this spike. The converter’s soft-start controller is sensitive to input voltage. What matters here is the actual voltage at the input terminals at all times. Symptoms of start-up diffi culties may include failed started, output oscillation or brief start up then overcurrent shutdown. Since the input voltage is never absolutely constant, the converter may start up at some times and not at others.

an external active power source. external pre-biased active source. leakage currents. Test your application to be sure. models, the output range is 0.75 to 5 Volts. regulation, do not exceed the 3.3V output. need to vary this resistance slightly to achieve your desired output setting. Two different trim equations are used for the W3 and D12 models. trim and output common to avoid instability. Two different trim equations are used for the W3 and D12 models. Figure 6. Trim Connections

Output subsystems may need +5V. Finally, peripherals use 5V and/or 12V. between these power sources and relative voltage differences between them. mands out of disk and peripheral controllers until they are ready to go to work. cause interface logic to send a wrong “epitaph” command. by Sequencing or Tracking circuits. Some systems combine both methods. tor the output voltages of all downstream POL’s with an A/D converter system. ing and fabricating external power controls such as high-current MOSFET’s. sequencer or rewriting software. Sequence/Track input is very fast (milliseconds). require more complex timing than that shown here. Figure 7. Power Up/Down Sequencing Controller

mance with excessive high current loads at turn-on. block any external high frequency noise. ramp up/down times and ramp tracking accuracy. LOW (FALSE) pulldown current to less than 10mA. Power Good while in transition. Figure 16. Equivalent Power Good Circuit

Non-isolated, DOSA-SIP , 6/10/16A Selectable-Output DC/DC Converters LSN2 Series Page 13 of 14www.cd4power.com MECHANICAL SPECIFICATIONS Case B11 Case B12 DIMENSIONS ARE IN INCHES (MM) 2%!26)%7 -AXIMUM 4YPICAL %130 %130 " ! " ! 490 4YPICAL 2%!26)%7 I/O CONNECTIONS Pin Function P68 Pin Function P68 1 +Output 6 Common 2 +Output 7 +Input 3 +Sense In 8 +Input 4 +Output B V TRACK/Sequence

5 Common 9 Trim

A Power Good Out * 10 On/Off Control I/O CONNECTIONS Pin Function P69 1 +Output OUT Trim

3 Common

B Power Good* 4 +Input

5 On/Off Control

• Power Good output is optional. If not installed, the pin is omitted. * Power Good output is optional. If not installed, the pin is omitted. 10/16 Amp Models

6 Amp Models

Non-isolated, DOSA-SIP , 6/10/16A Selectable-Output DC/DC Converters LSN2 Series Page 14 of 14www.cd4power.com TYPICAL PERFORMANCE CURVES /UTPUT#URRENT!MPS !MBIENT4EMPERATURE—# n LFM LFM LFM .ATURAL#ONVECTION ,3. $-AXIMUM#URRENT4EMPERATURE$ERATING 6AIRFLOWFROMINPUTTOOUTPUT /UTPUT#URRENT!MPS !MBIENT4EMPERATURE—# n LFM .ATURAL#ONVECTION ,3. $-AXIMUM#URRENT4EMPERATURE$ERATING 6AIRFLOWFROMINPUTTOOUTPUT ,3. %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —#6/54 ,OAD#URRENT!MPS %FFICIENCY 6). 6). 6). ,3. %FFICIENCYVS,INE6OLTAGEAND,OAD#URRENT —#6/54 ,OAD#URRENT!MPS %FFICIENCY 6). 6). 6). DS-0558 01/06 C&D Technologies (DATEL), Inc. makes no representation that the use of its products in the circuits described herein, or the us e of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions co ntained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. The DATEL logo is a registered trademark of C&D Technologies, Inc.. C&D Technologies (NCL), Ltd. Milton Keynes, United Kingdom, Tel: 44 (0) 1908 615232 Internet: www.cd4power.com E-mail: ped.ltd@cdtechno.com C&D Technologies (DATEL) S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01 Internet: www.cd4power.com E-mail: ped.sarl@cdtechno.com C&D Technologies (DATEL) GmbH München, Germany Tel: 89-544334-0 Internet: www.cd4power.com E-mail: ped.gmbh@cdtechno.com C&D Technologies KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-6354-2025 China Shanghai, People's Republic of China Tel: 86-50273678 Internet: www.cd4power.com E-mail: shanghai@cdtechno.com C&D Technologies (DATEL), Inc. 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 www.cd4power.com Email: sales@cdtechno.com ISO 9001 REGISTERED