DCT12S0A0S03PFA DELTA | Alldatasheet
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DS_DCT12S0A0S03PFA_09172013
FEATURES
High efficiency: 95.6% @ 12Vin, 5V/3A out Small size and low profile: Surface mount packaging Standard footprint Voltage and resistor-based trim Pre-bias startup Output voltage tracking No minimum load required Output voltage programmable from 0.59Vdc to 5.5Vdc via external resistor Fixed frequency operation Input UVLO, output OCP Remote on/off ISO 9001, TL 9000, ISO 14001, QS9000, OHSAS18001 certified manufacturing facility UL/cUL 60950-1 (US & Canada) CE mark meets 73/23/EEC and 93/68/EEC directives
APPLICATIONS
Telecom / DataCom Distributed power architectures Servers and workstations LAN / WAN applications Data processing applications OPTIONS Negative/Positive on/off logic Tracking feature Delphi DCT, Non-Isolated Point of Load DC/DC Power Modules: 4.5~14Vin, 0.59-5.5V/3Aout The Delphi Series DCT, 4.5-14V input, single output , non-isolated Point of Load DC/DC converters are the latest offering from a world leader in power systems technology and manufacturing -- Delta Electronics, Inc. The DCT series provides a programmable output voltage from 0. 59 V to 5.5V using an external resistor and has flexible and programmable tracking features to enable a variety of startup voltages as well as tracking between power modules . This product family is available in surface mount and provides up to 3A of output current in an industry standard footprint. With c reative design technology and optimization of component placement , these converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions.
DS_DCT12S0A0S03PFA_09172013 2 TECHNICAL SPECIFICATIONS (TA = 25°C, airflow rate = 300 LFM, Vin = 4.5Vdc to 14Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS DCT12S0A0S03PFA Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage (Continuous) -0.3 15 V Sequencing Voltage -0.3 Vin max V Operating Ambient Temperature -40 85 ℃ Storage Temperature -55 125 ℃ INPUT CHARACTERISTICS Operating Input Voltage Vo ≦ Vin –0.6 4.5 14.0 V Input Under-Voltage Lockout Turn-On Voltage Threshold 4.4 V Turn-Off Voltage Threshold 3.2 V Lockout Hysteresis Voltage 0.4 Maximum Input Current Vin=4.5V to14V, Io=Io,max 3.0 A No-Load Input Current (VIN = 12.0Vdc, Io = 0, module enabled) Vo,set = 0.6 Vdc 10 mA Vo,set = 3.3 Vdc 25 Off Converter Input Current (VIN = 12.0Vdc, module disabled) 0.8 mA Inrush Transient 1 A2S Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 1μH source impedance; Vin =0 to 14V, Io= Iomax ; 86 mAp-p OUTPUT CHARACTERISTICS Output Voltage Set Point with 0.5% tolerance for external resistor used to set output voltage) -1.5 Vo,set +1.5 %Vo,set Output Voltage Adjustable Range (selected by an external resistor) 0.59 5.5 V Output Voltage Regulation Line(VIN=VIN, min to VIN, max) For Vo>=2.5V 0.4 %Vo,set Vo,set For Vo<2.5V 10 mV Load(Io=Io, min to Io, max) For Vo>=2.5V 10 mV For Vo<2.5V 5 mV Temperature(Tref=TA, min to TA, max) For Vo>=2.5V 0.4 %Vo,set VoVo,set For Vo<2.5V 5 mV Total Output Voltage Range Over sample load, line and temperature -2.5 +2.5 %Vo,set Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth Peak-to-Peak Full Load, 1µF+10uF ceramic, 15 30 mV RMS Full Load, 1µF+10uF ceramic, 10 20 mV Output Current Range 0 3 A Output Voltage Over-shoot at Start-up Vout=5.0V 3 % Vo,set Output DC Current-Limit Inception 300 % Io Output Short-Circuit Current (Hiccup Mode) Io,s/c 0.5 Adc DYNAMIC CHARACTERISTICS Dynamic Load Response 10µF Tan & 1µF Ceramic load cap, 2.5A/µs Positive Step Change in Output Current 0% Io, max to 100% Io, max 200 mV Negative Step Change in Output Current 100% Io, max to 0% Io, max 200 mV Settling Time to 10% of Peak Deviation 20 µs Turn-On Transient Io=Io.max Start-Up Time, From On/Off Control Time for Von/off to Vo=10% of Vo,set 2 ms Start-Up Time, From Input Time for Vin=Vin,min to Vo=10% of Vo,set 2 ms Output Voltage Rise Time Time for Vo to rise from 10% to 90% of Vo,set 4 5 ms Output Capacitive Load Full load; ESR ≧0.15mΩ 47 1000 µF Full load; ESR ≧10mΩ 47 3000 µF EFFICIENCY Vo=5.0V Vin=12V, 100% Load 95.6 % Vo=2.5V Vin=12V, 100% Load 92.6 % Vo=1.2V Vin=4.5V, 100% Load 90.5 % Vo=0.59V Vin=4.5V, 100% Load 83.2 % FEATURE CHARACTERISTICS Switching Frequency 600 kHz ON/OFF Control, (Negative logic) Logic Low Voltage Module On, Von/off -0.2 0.6 V Logic High Voltage Module Off, Von/off 3.5 Vin,max V Logic Low Current Module On, Ion/off 10 µA Logic High Current Module Off, Ion/off 1 mA ON/OFF Control, (Positive Logic) Logic High Voltage Module On, Von/off 3.0 Vin,max V Logic Low Voltage Module Off, Von/off -0.3 0.6 V Logic Low Current Module On, Ion/off 1 mA Logic High Current Module Off, Ion/off 10 µA Tracking Slew Rate Capability 2 V/msec Tracking Delay Time Delay from Vin.min to application of tracking voltage 10 ms Tracking Accuracy Power-up 2V/mS 100 mV Power-down 1V/mS 100 mV GENERAL SPECIFICATIONS MTBF Io=80% of Io, max; Ta=25°C 17.95 M hours Weight 2.0 grams
Vo is the desired output voltage. the electrical specification.
0.590 Open
Figure 30. The Upper Limit curve shows that for output needs to be larger than the minimum of 4.5V.
DS_DCT12S0A0S03PFA_09172013 12 When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches the set-point voltage. The final value of the SEQ voltage must be set higher than the set-point voltage of the module. The output voltage follows the voltage on the SEQ pin on a one-to-one basis. By connecting multiple modules together, multiple modules can track their output voltages to the voltage applied on the SEQ pin. For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the module is ON by default. After applying input voltage to the module, a minimum 10msec delay is required before applying voltage on the SEQ pin. This delay gives the module enough time to complete its internal power-up soft-start cycle. During the delay time, the SEQ pin should be held close to ground (nominally 50mV ± 20 mV). This is required to keep the internal op-amp out of saturation thus preventing output overshoot during the start of the sequencing ramp. By selecting resistor R1 (see Figure. 33) according to the following equation 05.0
249501 VinR
Figure 32: Sequential Start-up The voltage at the sequencing pin will be 50mV when the sequencing signal is at zero. FEATURE DESCRIPTIONS (CON.) Voltage Margining Output voltage margining can be implemented in the DCT modules by connecting a resistor, R margin -up, from the Trim pin to the ground pin for margining -up the output voltage and by connecting a resistor, Rmargin-down, from the Trim pin to the output pin for margining -down. Figure 31 shows the circuit configuration for output v oltage margining. If unused, leave the trim pin unconnected. A calculation tool is available from the evaluation procedure which computes the values of Rmargin -up and Rmargin-down for a specific output voltage and margin percentage. Vo On/Off Vin GND Trim Rmargin-up Rmargin-down Rtrim Figure 31: Circuit configuration for output voltage margining Output Voltage Sequencing The DCT 12V 3A modules include a sequencing feature, EZ-SEQUENCE that enables users to implement various types of output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected.
DS_DCT12S0A0S03PFA_09172013 13 FEATURE DESCRIPTIONS (CON.) After the 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will track this voltage on a one-to-one volt bases until the output reaches the set-point voltage. To initiate simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input voltage must be maintained until the tracking and output voltages reach ground potential. When using the EZ-SEQUENCETM feature to control start-up of the module, pre-bias immunity during startup is disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode during start-up. When using the EZ-SEQUENCETM feature, modules goes through an internal set-up time of 10msec, and will be in synchronous rectification mode when the voltage at the SEQ pin is applied. This will result in the module sinking current if a pre-bias voltage is present at the output of the module. Figure 33: Circuit showing connection of the sequencing signal to the SEQ pin. Simultaneous Power Good The DCT modules provide a Power Good (PGOOD) signal that is implemented with an open-drain output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal will be de-asserted to a low state if any condition such as over temperature, over current or loss of regulation occurs that would result in the output voltage going ±10% outside the set point value. The PGOOD terminal should be connected through a pull up resistor (suggested value 100KΩ) to a source of 5VDC or lower. Monotonic Start-up and Shutdown The DCT 3A modules have monotonic start-up and shutdown behavior for any combination of rated input voltage, output current and operating temperature range.
DS_DCT12S0A0S03PFA_09172013 16 PICK AND PLACE LOCATION RECOMMENDED PAD LAYOUT SURFACE-MOUNT TAPE & REEL
DS_DCT12S0A0S03PFA_09172013 17 LEAD (Sn/Pb) PROCESS RECOMMEND TEMP . PROFILE Note: The temperature refers to the pin of DCT, measured on the pin Vout joint. LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE Note: The temperature refers to the pin of DCT, measured on the pin Vout joint. Temp. Time 150℃ 200℃ 90~120 sec. Time Limited 75 sec. above 220℃ 220℃ Preheat time Ramp up max. 3 ℃/sec. Ramp down max. 4 ℃/sec. Peak Temp. 240 ~ 245 ℃ 25℃
DS_DCT12S0A0S03PFA_09172013 18 MECHANICAL DRAWING
DS_DCT12S0A0S03PFA_09172013 19 PART NUMBERING SYSTEM DCT 12 S 0A0 S 03 P F A Product Series Input Voltage Numbers of Outputs Output Voltage Package Type Output Current On/Off logic Option Code DCT -3A DCS - 6A DCM - 12A DCL - 20A 04 - 2.4~5.5V 12 – 4.5~14V S - Single 0A0 - Programmable S - SMD 03 – 3A 06 - 6A 12 - 12A 20 - 20A N- negative P- positive F- RoHS 6/6 (Lead Free) A - Standard Function MODEL LIST Model Name Packaging Input Voltage Output Voltage Output Current Efficiency 12Vin, 5Vdc @ 3A CONTACT: www.deltaww.com/dcdc USA: Telephone: East Coast: 978-656-3993 West Coast: 510-668-5100 Fax: (978) 656 3964 Email: DCDC@delta-corp.com Europe: Telephone: +31-20-655-0967 Fax: +31-20-655-0999 Email: DCDC@delta-es.tcom Asia & the rest of world: Telephone: +886 3 4526107 Ext. 6220~6224 Fax: +886 3 4513485 Email: DCDC@delta.com.tw WARRANTY Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon request from Delta. Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these specifications at any time, without notice.