Delta Electronics ND User Manual

Delphi ND Series Non-Isolated Point of Load

FEATURES

 High efficiency:

92.5% @ 12Vin, 3.3V/50A out

y Size: 61.0x31.8x10.2mm

(2.40”×1.25”×0.40”)

 Voltage and resistor-based trim

 No minimum load required

 Output voltage programmable from

0.9Vdc to 3.63Vdc via external resistors

 Fixed frequency operation

 Single-in line package (SIP)

 Input UVLO, output OCP, OTP, SCP

 Remote ON/OFF (Positive)

 Power good output signal (open collector)

 Output voltage sense

 ISO 9001, TL 9000, ISO 14001, QS9000,

OHSAS18001 certified manufacturing facility

 UL/cUL 60950-1 (US & Canada), TUV

(EN60950-1) - pending

DC/DC Power Modules: 12Vin, 0.9V~3.63Vout, 50Aout

The Delphi ND Series, 12V input, single output, non-isolated point of

load (POL) DC/DC converters are the latest offering from a world leader

in power systems technology and manufacturing — Delta Electronics,

Inc. The ND/NE product family is the second generation, non-isolated

point-of-load DC/DC power modules for the DataCom / Networking / IT

Applications and it will help to cut the module size by 35% to 50%

compared to the first generation NC series POL modules. The ND/NE

product family provides 6A to 60A of output current in a vertically or

horizontally mounted through-hole package and the output can be

resistor trimmed from 0.9Vdc to 3.63Vdc. It provides a very cost

effective, high efficiency, and high density point of load solution. With

creative 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.

OPTION

 Negative on/off logic

 Current sharing

APPLICATIONS

 DataCom

 Distributed power architectures

 Servers and workstations

 LAN / WAN applications

 Data processing applications

PRELIMINARY DATASHEET DS_ND12S50A_07172008

TECHNICAL SPECIFICATIONS

(Ambient Temperature=25°C, minimum airflow=200LFM, nominal Vin=12Vdc unless otherwise specified.)

PARAMETER NOTES and CONDITIONS ND12S0A0V50 (Standard)

Min. Typ. Max. Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage -0.3 13.8 Vdc Operating Temperature Refer to Figure 32 for the measuring point 0 124 °C Storage Temperature -40 125 °C Input/Output Isolation Voltage Non-isolated NA V

INPUT CHARACTERISTICS

Operating Input Voltage 10.2 12.0 13.8 V Input Under-Voltage Lockout

Turn-On Voltage Threshold 8.5 9.0 9.5 V Turn-Off Voltage Threshold 7.1 7.6 8.1 V

Lockout Hysteresis Voltage 1.4 V Maximum Input Current 100% Load, 10.2Vin, 3.3Vout 24 A No-Load Input Current Vin=12V, Vout=3.3V 250 mA Off Converter Input Current Remote OFF 15 30 mA Inrush Transient Vin=10.2~13.8V, Io=Min to Max Load 1.00 A2S Input Reflected-Ripple Current Refer to Figure 31. 20 mA Input Ripple Rejection 120Hz 60 dB

OUTPUT CHARACTERISTICS

Output Voltage Adjustment Range 0.9 3.63 V Output Voltage Set Point With a 1.0% trim resistor -2 +2 % Output Voltage Regulation

Over Load Io=Io_min to Io_max -1 +1 %

Over Line Vin=Vin_min to Vin_max -0.2 +0.2 % Total output range Over load, line, temperature regulation and set point -3 +3 % Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Full Load, 1uF ceramic, 10uF Tan cap and 4*680uF OSCON 25 50 mV

RMS Full Load, 1uF ceramic, 10uF Tan cap and 4*680uF OSCON 5 15 mV Output Current Range 0 50 A Output Voltage Over-shoot at Start-up Vin=12V, Turn ON 2 % Output Voltage Under-shoot at Power-Off Vin=12V, Turn OFF 100 mV Output DC Current-Limit Inception Hiccup mode 110 200 %Iomax

DYNAMIC CHARACTERISTICS

Output Dynamic Load Response 12Vin, 1uF ceramic, 10uF Tan cap and 4*680uF OSCON

Positive Step Change in Output Current 25A to 37.5A, 10A/uS 75 mV

Negative Step Change in Output Current 37.5A to 25A, 10A/uS 75 mV

Settling Time Settling to be within regulation band (to 10% Vo deviation) 50 µs Turn-On Transient

Start-Up Time, from On/Off Control From Enable high to 90% of Vo 10 ms

Start-Up Time, from input power From Vin=12V to 90% of Vo 10 ms Minimum Output Capacitance Ex: One OSCON 6.3V/680uF (ESR=13m max) 680 µF Maximum Output Startup Capacive Load Minimum Input Capacitance 0 µF

EFFICIENCY

Vo=0.9V Vin=12V, Io=50A 81 % Vo=1.2V Vin=12V, Io=50A 84.5 % Vo=1.5V Vin=12V, Io=50A 87 % Vo=1.8V Vin=12V, Io=50A 88.5 % Vo=2.5V Vin=12V, Io=50A 91 % Vo=3.3V Vin=12V, Io=50A 92.5 % Vo=3.63V Vin=12V, Io=50A 92.8 %

FEATURE CHARACTERISTICS

Switching Frequency Fixed 300 KHz ON/OFF Control Positive logic (internally pulled high) Logic High Module On (or leave the pin open) 2.4 Vinmax V Logic Low Module Off -0.2 0.8 V Remote Sense Range 0.5 V

GENERAL SPECIFICATIONS

Calculated MTBF Telcordia SR-332 Issue1 Method1 Case3 at 50°C TBD Mhours Weight 34.2 grams Over-Temperature Shutdown Refer to Figure 32 for the measuring point 134 °C

Full Load (ESR≧1m)

3000 µF

DS_ND12S10A_07172008

ELECTRICAL CHARACTERISTICS CURVES

EFFICIENCY (%)

5.01 10 15 20 25 30 35 40 45 50

OUTPUT CURRENT (A)

Figure 1: Converter efficiency vs. output current

(0.9V output voltage)

EFFICIENCY (%)

5.01 10 15 20 25 30 35 40 45 50

10.2 12.0 13.8

EFFICIENCY (%)

5.01 10 15 20 25 30 35 40 45 50

OUTPUT CURRENT (A)

10.2 12.0 13.8

Figure 2: Converter efficiency vs. output current

(1.2V output voltage)

100

EFFICIENCY (%)

5.01 10 15 20 25 30 35 40 45 50

10.2 12.0 13.8

OUTPUT CURRENT (A)

Figure 3: Converter efficiency vs. output current

(1.5V output voltage)

100

EFFICIENCY (%)

5.01 10 15 20 25 30 35 40 45 50

OUTPUT CURRENT (A)

Figure 5: Converter efficiency vs. output current

(2.5V output voltage)

10.2 12.0 13.8

DS_ND12S10A_07172008

OUTPUT CURRENT (A)

Figure 4: Converter efficiency vs. output current

(1.8V output voltage)

100

EFFICIENCY (%)

5.01 10 15 20 25 30 35 40 45 50

OUTPUT CURRENT (A)

10.2 12.0 13.8

Figure 6: Converter efficiency vs. output current

(3.3V output voltage)

ELECTRICAL CHARACTERISTICS CURVES (CON.)

Figure 7: Output ripple & noise at 12Vin, 0.9V/50A out

Figure 9: Output ripple & noise at 12Vin, 1.5V/50A out

Figure 8: Output ripple & noise at 12Vin, 1.2V/50A out

Figure 10: Output ripple & noise at 12Vin, 1.8V/50A out

Figure 11: Output ripple & noise at 12Vin, 2.5V/50A out

DS_ND12S10A_07172008

Figure 12: Output ripple & noise at 12Vin, 3.3V/50A out

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