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
The Delphi NC40 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 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
optimization of component placement, these converters possess
outstanding electrical and thermal performance, as well as extremely
high reliability under highly stressful operating conditions.
Vertical or horizontal versions
Negative On/Off logic
APPLICATIONS
DataCom
Distributed power architectures
Servers and workstations
LAN / WAN applications
Data processing applications
DATASHEET
DS_NC12S40A_05282008
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=400LFM, V
in
=12Vdc, nominal Vout unless otherwise noted)
PARAMETER
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Operating Temperature
Storage Temperature
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
Output Short-Circuit Input Current
OUTPUT CHARACTERISTICS
Output Voltage Adjustment Range
Output Voltage Set Point
Output Voltage Regulation
Over Load
Over Line
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Output Current Range
Output Voltage Over-shoot at Start-up
Output Voltage Under-shoot at Power-Off
Output DC Current-Limit Inception
DYNAMIC CHARACTERISTICS
Out Dynamic Load Response
Positive Step Change in Output Current
Negative Step Change in Output Current
Settling Time
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Minimum Output Startup Capacitive Load
Maximum Output Startup Capacitive Load
Minimum Input Capacitance
EFFICIENCY
Vo=0.9V
Vo=1.2V
Vo=1.5V
Vo=1.8V
Vo=2.5V
Vo=3.3V
Vo=5.0V
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control
Logic High
Logic Low
Remote Sense Range
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
NOTES and CONDITIONS
Min.
Refer to Figures 36 and 41 for the measuring point
Non-isolated
10.2
0
-40
NC12S0A0V40
Typ.
Max.
14
125
125
NA
12
9.0
8.3
0.7
13.8
Units
Vdc
°C
°C
V
V
V
V
V
A
mA
mA
mA
dB
A
V
%
%
%
mV
mV
A
%
mV
A
100% Load, 10.2Vin, 5Vout
160
40
150
55
23
Refer to Figure 35
120 Hz
1
0.9
-3.0
-1.0
-0.2
5.0
+3.0
+1.0
+0.2
50
15
40
1
100
Vin=12V, Io=Io,max, 1% trim resistors
Io=Io,min to Io,max
Vin=Vin,min to Vin,max
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
Vin=12V, Turn ON
Vin=12V, Turn OFF
0
62
12Vin, 10µF Tan & 1µF Ceramic load cap, 10A/µs
50% Io,max to 75% Io,max
75% Io,max to 50% Io,max
Settling to be within regulation band (+/- 3.0%)
Io=Io.max
Vin=12V, Vo=10% of Vo,set
Vo=10% of Vo,set
Ex: Three OSCON 6.3V/680µF (ESR 13mΩ max each)
Full load
Ex: Two OSCON 16V/270µF (ESR 18mΩ max each)
Vin=12V, Io=30A
Vin=12V, Io=30A
Vin=12V, Io=30A
Vin=12V, Io=30A
Vin=12V, Io=30A
Vin=12V, Io=30A
Vin=12V, Io=30A
75
75
150
10
30
2040
6120
540
75
80
83
85
88
90
92
300
mV
mV
µs
ms
ms
µF
µF
µF
%
%
%
%
%
%
%
KHz
Positive logic (internally pulled high)
Module On (or leave the pin open)
Module Off
2.4
0
5.5
0.8
400
2.5
37
130
V
V
mV
M hours
grams
°C
Telcordia SR-332 Issue1 Method1 Case3 at 50C
Auto restart, refer to Figs 36 & 41 for the measuring point
DS_NC12S40A_05282008
2
ELECTRICAL CHARACTERISTICS CURVES
90
80
70
90
80
70
Efficiency (%)
60
50
40
30
20
10
0
0
3
5
8
11 13 16 19 21 24 27 29 32 35 37 40
10.2
12
13.8
Efficiency (%)
60
50
40
30
20
10
0
0
3
5
8
11 13 16 19 21 24 27 29 32 35 37 40
10.2
12
13.8
Output Current (A)
Output Current (A)
Figure 1:
Converter efficiency vs. output current
(0.9V output voltage)
100
90
80
Figure 2:
Converter efficiency vs. output current
(1.2V output voltage)
100
90
80
Efficiency (%)
60
50
40
30
20
10
0
0
3
5
8
11 13 16 19 21 24 27 29 32 35 37 40
10.2
12
13.8
Efficiency (%)
70
70
60
50
40
30
20
10
0
0
3
5
8
11 13 16 19 21 24 27 29 32 35 37 40
10.2
12
13.8
Output Current (A)
Output Current (A)
Figure 3:
Converter efficiency vs. output current
(1.5V output voltage)
100
90
80
Figure 4:
Converter efficiency vs. output current
(1.8V output voltage)
100
90
80
Efficiency (%)
60
50
40
30
20
10
0
0
3
5
8
11 13 16 19 21 24 27 29 32 35 37 40
10.2
12
13.8
Efficiency (%)
70
70
60
50
40
30
20
10
0
0
3
5
8
11 13 16 19 21 24 27 29 32 35 37 40
10.2
12
13.8
Output Current (A)
Output Current (A)
Figure 5:
Converter efficiency vs. output current
(2.5V output voltage)
Figure 6:
Converter efficiency vs. output current
(3.3V output voltage)
DS_NC12S40A_05282008
3
ELECTRICAL CHARACTERISTICS CURVES (CON.)
100
90
80
Efficiency (%)
70
60
50
40
30
20
10
0
0
3
5
8
11 13 16 19 21 24 27 29 32 35 37 40
10.2
12
13.8
Output Current (A)
Figure 7:
Converter efficiency vs. output current
(5V output voltage)
Figure 8:
Output ripple & noise at 12Vin, 0.9V/40A out
Figure 9:
Output ripple & noise at 12Vin, 1.2V/40A out
Figure 10:
Output ripple & noise at 12Vin, 1.5V/40A out
Figure 11:
Output ripple & noise at 12Vin, 1.8V/40A out
Figure 12:
Output ripple & noise at 12Vin, 2.5V/40A out
DS_NC12S40A_05282008
4
ELECTRICAL CHARACTERISTICS CURVES (CON.)
Figure 13:
Output ripple & noise at 12Vin, 3.3V/40A out
Figure 14:
Output ripple & noise at 12Vin, 5V/40A out
Figure 15:
Turn on delay time at 12Vin, 0.9V/40A out
Ch2:Vin Ch3:Vout Ch4:PWRGD
Figure 16:
Turn on delay time Remote On/Off, 0.9V/40A out
Ch2:ENABLE Ch3:Vout Ch4:PWRGD
Figure 17:
Turn on delay time at 12Vin, 5V/40A out
Ch2:Vin Ch3:Vout Ch4:PWRGD
Figure 18:
Turn on delay time Remote On/Off, 5V/40A out
Ch2: ENABLE Ch3:Vout Ch4:PWRGD
DS_NC12S40A_05282008
5
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