FEATURES High efficiency: 92% 12Vin, 5V/40A out Voltage and resistor-based trim No minimum load required Output voltage programmable from 0.9Vdc to 5.0Vdc via external resistors Fixed frequency operation Input UVLO, output OVP, OTP, OCP, SCP Remote ON/OFF (default: positive) Power good output signal Output voltage sense ISO 9001, TL 9000, ISO 14001, QS 9000, OHSAS 18001 certified manufacturing facility UL/cUL 60950 (US & Canada) Recognized, and TUV (EN60950) Certified CE mark meets 73/23/EEC and 93/68/EEC directives Delphi NC40 Series Non-Isolated Point of Load DC/DC Power Modules: 12Vin, 0.9V-5Vout, 40A OPTIONS Vertical or horizontal versions The Delphi NC40 Series, 12V input, single output, non-isolated point of Negative On/Off logic load DC/DC converters are the latest offering from a world leader in power systems technology and manufacturing Delta Electronics, Inc. The NC40 series operates from a 12V nominal input, provides up to 40A of power in a vertical or horizontal mounted through-hole package and the output can be resistor- or voltage-trimmed from 0.9Vdc to 5.0Vdc. NC40 series has built-in current sharing control and multiple NC30/NC40 series modules could be paralleled together to provide even higher output currents. NC40 series provides a very cost effective point of load solution. With creative design technology and APPLICATIONS optimization of component placement, these converters possess DataCom outstanding electrical and thermal performance, as well as extremely Distributed power architectures high reliability under highly stressful operating conditions. Servers and workstations LAN / WAN applications Data processing applications DATASHEET DS NC12S40A 05282008 TECHNICAL SPECIFICATIONS (T =25C, airflow rate=400LFM, V =12Vdc, nominal Vout unless otherwise noted) A in PARAMETER NOTES and CONDITIONS NC12S0A0V40 Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage 14 Vdc Operating Temperature Refer to Figures 36 and 41 for the measuring point 0 125 C Storage Temperature -40 125 C Input/Output Isolation Voltage Non-isolated NA V INPUT CHARACTERISTICS Operating Input Voltage 10.2 12 13.8 V Input Under-Voltage Lockout Turn-On Voltage Threshold 9.0 V Turn-Off Voltage Threshold 8.3 V Lockout Hysteresis Voltage 0.7 V Maximum Input Current 100% Load, 10.2Vin, 5Vout 23 A mA No-Load Input Current 160 Off Converter Input Current 40 mA Input Reflected-Ripple Current Refer to Figure 35 150 mA Input Voltage Ripple Rejection 120 Hz 55 dB Output Short-Circuit Input Current 1 A OUTPUT CHARACTERISTICS V Output Voltage Adjustment Range 0.9 5.0 Output Voltage Set Point Vin=12V, Io=Io,max, 1% trim resistors -3.0 +3.0 % Output Voltage Regulation Over Load Io=Io,min to Io,max -1.0 +1.0 % Over Line Vin=Vin,min to Vin,max -0.2 +0.2 % Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth Peak-to-Peak Full Load, 1F ceramic, 10F tantalum 50 mV RMS Full Load, 1F ceramic, 10F tantalum 15 mV Output Current Range 0 40 A Output Voltage Over-shoot at Start-up Vin=12V, Turn ON 1 % Output Voltage Under-shoot at Power-Off Vin=12V, Turn OFF 100 mV Output DC Current-Limit Inception 62 A DYNAMIC CHARACTERISTICS Out Dynamic Load Response 12Vin, 10F Tan & 1F Ceramic load cap, 10A/s Positive Step Change in Output Current 50% Io,max to 75% Io,max 75 mV Negative Step Change in Output Current 75% Io,max to 50% Io,max 75 mV Settling Time Settling to be within regulation band (+/- 3.0%) 150 s Turn-On Transient Io=Io.max Start-Up Time, From On/Off Control Vin=12V, Vo=10% of Vo,set 10 ms Start-Up Time, From Input Vo=10% of Vo,set 30 ms Ex: Three OSCON 6.3V/680F (ESR 13m max each) Minimum Output Startup Capacitive Load 2040 F Maximum Output Startup Capacitive Load Full load 6120 F Ex: Two OSCON 16V/270F (ESR 18m max each) Minimum Input Capacitance 540 F EFFICIENCY Vo=0.9V Vin=12V, Io=30A 75 % Vo=1.2V Vin=12V, Io=30A 80 % Vo=1.5V Vin=12V, Io=30A 83 % Vo=1.8V Vin=12V, Io=30A 85 % Vo=2.5V Vin=12V, Io=30A 88 % Vo=3.3V Vin=12V, Io=30A 90 % Vo=5.0V Vin=12V, Io=30A 92 % FEATURE CHARACTERISTICS Switching Frequency 300 KHz ON/OFF Control Positive logic (internally pulled high) Logic High Module On (or leave the pin open) 2.4 5.5 V Logic Low Module Off 0 0.8 V Remote Sense Range 400 mV GENERAL SPECIFICATIONS MTBF Telcordia SR-332 Issue1 Method1 Case3 at 50C 2.5 M hours Weight 37 grams Over-Temperature Shutdown Auto restart, refer to Figs 36 & 41 for the measuring point 130 C DS NC12S40A 05282008 2