Delta Electronics NC15 User Manual

Delphi NC15 Series Non-Isolated Point of Load

FEATURES

 High Efficiency:

91% @ 12Vin, 5V/15A out

 Size: 30.5x27.9x11.4mm

(1.20”×1.10”×0.45”) -- Vertical

30.5x27.9x12.9mm

(1.20”×1.10”×0.51”) -- Horizontal

 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 OCP, SCP

 Power good output signal

 Remote ON/OFF (default: Positive)

 ISO 9000, TL 9000, ISO 14001 certified

manufacturing facility

 UL/cUL 60950-1 (US & Canada)

Recognized, and TUV (EN60950-1)

Certified

 CE mark meets 73/23/EEC and 93/68/EEC

directives

DC/DC Power Modules: 12Vin, 0.9V-5.0Vout, 15A

The Delphi NC15 Series, 12V 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 NC15 series operates from a 12V nominal input, provides up to 15A

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. It

provides a very cost effective 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.

OPTIONS

 Vertical or horizontal versions

 Negative ON/OFF logic

APPLICATIONS

 DataCom

 Distributed power architectures

 Servers and workstations

 LAN / WAN applications

 Data processing applications

DATASHEET
DS_NC12S15A_01102008

TECHNICAL SPECIFICATIONS

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

PARAMET E R NOTES and CONDITIONS NC12S0A0V/H15

Min. Typ. Max. Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage 14 Vdc
Operating Temperature (Vertical) With appropriate air flow and derating, see Figs 33 0 130 °C
Operating Temperature (Horizontal) With appropriate air flow and derating, see Figs 39 0 125 °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 9.0 V
Turn-Off Voltage Threshold 7.5 V

Lockout Hysteresis Voltage 1.5 V
Maximum Input Current 100% Load, 10.2Vin, 5.0Vout 8.1 A
No-Load Input Current Vin=12V, Vout=0.9V 65 mA
Off Converter Input Current Remote OFF 9 mA
Input Reflected-Ripple Current Refer to Figure 31. 150 mA
Input Ripple Rejection 120Hz 45 dB

OUTPUT CHARACTERISTICS

Output Voltage Adjustment Range 0.9 5.0 V
Output Voltage Set Point With a 1.0% trim resistor -2.5 +2.5 %
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, 100nF ceramic, 10µF tantalum 50 mV

RMS Full Load, 100nF ceramic, 10µF tantalum 20 mV
Output Current Range 0 15 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 Hiccup mode 16 A
Output Short-Circuit Current Hiccup mode

DYNAMIC CHARACTERISTICS

Output Dynamic Load Response 12Vin, 100nF ceramic, 10µF tantalum load cap, 10A/µs

Positive Step Change in Output Current 50% Io_max to 75% Io_max 100 mV

Negative Step Change in Output Current 75% Io_max to 50% Io_max 100 mV

Settling Time Settling to be within regulation band (Vo +/- 2.5%) 200 µs
Turn-On Transient

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

Start-Up Time, from input power From Vin=12V to 10% of Vo 10 ms
Minimum Output Capacitance Ex: OSCON 6.3V/680µF (ESR 13 mΩ max.) 680 µF
Maximum Output Startup Capacive Load Full Load 6800 µF
Minimum Input Capacitance Ex: OSCON 16V/270µF (ESR 18 mΩ max.) 270 µF

EFFICIENCY

Vo=0.9V Vin=12V, Io=15A 75 %
Vo=1.2V Vin=12V, Io=15A 79 %
Vo=1.5V Vin=12V, Io=15A 81 %
Vo=1.8V Vin=12V, Io=15A 84 %
Vo=2.5V Vin=12V, Io=15A 87 %
Vo=3.3V Vin=12V, Io=15A 89 %
Vo=5.0V Vin=12V, Io=15A 91 %

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 5.5 V
Logic Low Module Off 0 0.8 V

GENERAL SPECIFICATIONS

MTBF Telcordia SR-332 Issue1 Method1 Case3 at 50°C 2.1 M hours
Weight 16.5 grams

NC12S15A_01102008

2

ELECTRICAL CHARACTERISTICS CURVES

90

80

70

60

50

40

30

Efficiency (%)

20

10

0

01234567 89101112131415

10.2 12 13.8

Output Current (A)

Figure 1: Converter efficiency vs. output current Figure 2: Converter efficiency vs. output current

(0.9V output voltage) (1.2V output voltage)

90

80

70

60

50

40

30

Efficiency (%)

20

10

0

01234567 89101112131415

10.2 12 13.8

Output Current (A)

100

90

80

70

60

50

40

Efficiency (%)

30

20

10

0

0123456789101112131415

10.2 12 13.8

Output Current (A)

Figure 3: Converter efficiency vs. output current

(1.8V output voltage)

100

90

80

70

60

50

40

Efficiency (%)

30

20

10

0

0123456789101112131415

10.2 12 13.8

Output Current (A)

Figure 5: Converter efficiency vs. output current

(3.3V output voltage)

100

90

80

70

60

50

40

Efficiency (%)

30

20

10

0

0123456789101112131415

10.2 12 13.8

Output Current (A)

Figure 4: Converter efficiency vs. output current

(2.5V output voltage)

100

90

80

70

60

50

40

Efficiency (%)

30

20

10

0

0123456789101112131415

10.2 12 13.8

Output Current (A)

Figure 6: Converter efficiency vs. output current

(5.0V output voltage)

NC12S15A_01102008

3

ELECTRICAL CHARACTERISTICS CURVES

Figure 7: Output ripple & noise at 12Vin, 0.9V/15A out

Figure 9: Output ripple & noise at 12Vin, 1.8V/15A out

Figure 8: Output ripple & noise at 12Vin, 1.2V/15A out

Figure 10: Output ripple & noise at 12Vin, 2.5V/15A out

Figure 11: Output ripple & noise at 12Vin, 3.3V/15A out

NC12S15A_01102008

Figure 12: Output ripple & noise at 12Vin, 5.0V/15A out

4

ELECTRICAL CHARACTERISTICS CURVES

Figure 13: Turn on delay time at 12Vin, 0.9V/15A out

Ch2:Vin Ch3:Vout Ch4:PWRGD

Figure 15: Turn on delay time at 12Vin, 2.5V/15A out

Ch2:Vin Ch3:Vout Ch4:PWRGD

Figure 14: Turn on delay time Remote On/Off, 0.9V/15A out

Ch2:ENABLE Ch3:Vout Ch4:PWRGD

Figure 16: Turn on delay time at Remote On/Off, 2.5V/15A out

Ch2:ENABLE Ch3:Vout Ch4:PWRGD

Figure 17: Turn on delay time at 12Vin, 5.0V/15A out

Ch2:Vin Ch3:Vout Ch4:PWRGD

NC12S15A_01102008

Figure 18: Turn on delay time at Remote On/Off, 5.0V/15A out

Ch2:ENABLE Ch3:Vout Ch4:PWRGD

5