DELTA NC12S0A0V60NNFA

FEATURES
High Efficiency:
95% @ 12Vin, 5V/60A 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 OTP, OCP, SCP
Remote ON/OFF (default: positive)
ISO 9001, TL 9000, ISO 14001, QS9000,
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 NC Series Non-Isolated Point of Load
DC/DC Power Modules: 12Vin, 0.9V-5Vout, 60A
OPTIONS
The Delphi NC 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. This product family provides up to 60A of power in a vertical or
horizontal mounted through-hole package. The NC12S0A0V60 will
provide up to 60A of output current 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.
Negative On/Off logic
APPLICATIONS
DataCom
Distributed power architectures
Servers and workstations
LAN/WAN applications
Data processing applications
DATASHEET
DS_NC12S60A_02072007
TECHNICAL SPECIFICATIONS (T =25°C, airflow rate=400LFM, V
A
PARAMETER
in
=12Vdc, nominal Vout unless otherwise noted)
NOTES and CONDITIONS
NC12S0A0V60
Min.
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
Calculated MTBF
Weight
Over-Temperature Shutdown
DS_NC12S60A_02072007
Refer to Figure 36 for the measuring point
Non-isolated
Typ.
0
-40
Max.
Units
12.6
50
125
Vdc
°C
°C
V
12.6
V
NA
11.04
12
9.4
8.3
1.1
1
V
V
V
A
mA
mA
mA
dB
A
0.9
-3.0
5.0
+3.0
V
%
-1.5
-0.2
+1.5
+0.2
%
%
0
50
15
60
1
100
mV
mV
A
%
mV
A
100
100
150
mV
mV
µs
10
30
ms
ms
µF
µF
µF
100% Load, 11.04Vin, 5Vout
32
250
40
150
45
Refer to Figure 35
120 Hz
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, 0.1µF ceramic, 10µF tantalum
Full Load, 0.1µF ceramic, 10µF tantalum
Vin=12V, Turn ON
Vin=12V, Turn OFF
94
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: Four OSCON 6.3V/680µF (ESR 13mΩ max each)
Full load
Ex: Three OSCON 16V/270µF (ESR 18mΩ max each)
75
75
2720
8160
810
Vin=12V, Io=60A
Vin=12V, Io=60A
Vin=12V, Io=60A
Vin=12V, Io=60A
Vin=12V, Io=60A
Vin=12V, Io=60A
Vin=12V, Io=60A
Positive logic (internally pulled high)
Module On (or leave the pin open)
Module Off
Telcordia SR-332 Issue1 Method1 Case3 at 50℃
Refer to Figure 36 for the measuring point
83
86
88
90
92
93
95
%
%
%
%
%
%
%
300
KHz
2.4
0
5.5
0.8
400
1.29
37
130
V
V
mV
M hours
grams
°C
2
100
100
90
90
80
80
70
70
Efficiency (%)
Efficiency (%)
ELECTRICAL CHARACTERISTICS CURVES
60
50
40
Vin = 11.04V
30
Vin = 12.0V
20
Vin = 12.6V
60
50
40
Vin = 11.04V
30
Vin = 12.0V
20
Vin = 12.6V
10
10
0
0
0
10
20
30
40
50
0
60
10
100
100
90
90
80
80
70
70
60
50
40
Vin = 11.04V
30
Vin = 12.0V
Vin = 12.6V
40
50
60
60
50
40
Vin = 11.04V
30
Vin = 12.0V
20
Vin = 12.6V
10
10
0
0
0
10
20
30
40
50
0
60
10
Figure 3: Converter efficiency vs. output current
(1.5V output voltage)
30
40
50
60
Figure 4: Converter efficiency vs. output current
(1.8V output voltage)
100
90
90
80
80
70
70
Efficiency (%)
100
60
50
40
Vin = 11.04V
30
Vin = 12.0V
20
20
Output Current (A)
Output Current (A)
Efficiency (%)
30
Figure 2: Converter efficiency vs. output current
(1.2V output voltage)
Efficiency (%)
Efficiency (%)
Figure 1: Converter efficiency vs. output current
(0.9V output voltage)
20
20
Output Current (A)
Output Current (A)
Vin = 12.6V
60
50
40
Vin = 11.04V
30
Vin = 12.0V
20
Vin = 12.6V
10
10
0
0
0
10
20
30
40
Output Current (A)
Figure 5: Converter efficiency vs. output current
(2.5V output voltage)
DS_NC12S60A_02072007
50
60
0
10
20
30
40
50
60
Output Current (A)
Figure 6: Converter efficiency vs. output current
(3.3V output voltage)
3
ELECTRICAL CHARACTERISTICS CURVES (CON.)
100
90
Efficiency (%)
80
70
60
50
40
Vin = 11.04V
30
Vin = 12.0V
20
Vin = 12.6V
10
0
0
10
20
30
40
50
60
Output Current (A)
Figure 7: Converter efficiency vs. output current
(5V output voltage)
Figure 8: Output ripple & noise at 12Vin, 0.9V/60A out
Figure 9: Output ripple & noise at 12Vin, 1.2V/60A out
Figure 10: Output ripple & noise at 12Vin, 1.5V/60A out
Figure 11: Output ripple & noise at 12Vin, 1.8V/60A out
Figure 12: Output ripple & noise at 12Vin, 2.5V/60A out
DS_NC12S60A_02072007
4
ELECTRICAL CHARACTERISTICS CURVES (CON.)
Figure 13: Output ripple & noise at 12Vin, 3.3V/60A out
Figure 14: Output ripple & noise at 12Vin, 5V/60A out
Figure 15: Turn on delay time at 12Vin, 0.9V/60A out
Ch1:OUTEN Ch2:Vout Ch3:PWRGD
Figure 16: Turn on delay time Remote On/Off, 1.2V/60A out
Ch1:OUTEN Ch2:Vout Ch3:PWRGD
Figure 17: Turn on delay time at 12Vin, 3.3V/60A out
Ch1:OUTEN Ch2:Vout Ch3:PWRGD
Figure 18: Turn on delay time Remote On/Off, 5V/60A out
Ch1:OUTEN Ch2:Vout Ch3:PWRGD
DS_NC12S60A_02072007
5
ELECTRICAL CHARACTERISTICS CURVES (CON.)
Figure 19: Typical transient response to step load change at
10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin, 1.2V
out
Figure 20: Typical transient response to step load change at
10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin,
1.5V out
Figure 21: Typical transient response to step load change at
10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin, 1.8V
out
Figure 22: Typical transient response to step load change at
10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin,
2.5V out
Figure 23: Typical transient response to step load change at
10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin, 3.3V
out
Figure 24: Typical transient response to step load change at
10A/µS from 50% to 75% and 75% to 50% of Io, max at 12Vin,
5.0V out
DS_NC12S60A_02072007
6
DESIGN CONSIDERATIONS
FEATURES DESCRIPTIONS
The NC60A is designed using three-phase synchronous
buck topology. Block diagram of the converter is shown in
Figure 25. The output can be trimmed in the range of 0.9V
to 5.0V by a resistor from trim pin to ground. The remote
sense is able to compensate for a drop from the output of
converter to point of load.
Remote On/Off
The converter can be turned on/off by remote control.
Positive OUTEN logic implies that the converter DC
output is enabled when this signal is driven high (greater
than 2.4V) or floating and disabled when low (below
0.8V). Negative OUTEN logic is an option.
The converter provides an open collector signal, Power
Good. The power good signal is pulled low when output is
not within ±10% of Vout or when Enable is off.
The converter can protect itself into hiccup mode against
over current and short circuit condition. Also, the
converter will shut down due to over voltage protection is
detected.
The converter has an over temperature protection which
can protect itself by shutting down for an over
temperature event. There is a thermal hysteresis of
typically 25℃
The remote ON/OFF input allows external circuitry to put
the NC converter into a sleep mode. Active-high remote
on/off is available as standard.
Active-high units of the NC series are turned on if the
remote ON/OFF pin is high (or floating). Pulling the pin low
will turn off the unit. To guarantee turn-on the enable
voltage must be above 2.4V and to turn off the enable
voltage must be pulled below 0.8V
The remote ON/OFF input can be driven in a variety of
ways as shown in Figures 26, 27, and 28. If the remote
ON/OFF signal originates on the primary side, the remote
ON/OFF input can be driven through a discrete device
(e.g. a bipolar signal transistor) or directly from a logic
gate output. The output of the logic gate may be an
open-collector (or open-drain) device. If the drive signal
originates from the opposite of an isolated side, the
remote ON/OFF input can be isolated and driven through
an opto-coupler.
o
o
VIN
GROUND
OUTEN
o
o
o
Vo
TRIM
GROUND
Safety Considerations
It is recommended to add a fuse at input line. As to
current rating of the fuse, it depends on the output voltage
and current setting.
Figure26: Remote ON/OFF Input Drive Circuit for Non-Isolated
Bipolar
5V
o
o
VIN
GROUND
OUTEN
Vo
TRIM
GROUND
o
o
o
Figure 27: Remote ON/OFF Input Drive Circuit for Logic Driver
Figure 25: Block Diagram
DS_NC12S60A_02072007
7
FEATURES DESCRIPTIONS (CON.)
o
o
Vo
VIN
GROUND
OUTEN
TRIM
GROUND
o
o
o
Under Voltage Lockout
The undervoltage lockout prevents the converter from
operating when the input voltage is too low. The lockout
occurs between 8.3V to 9.4V. This allows more flexibility
in designing and ensures operation on supply lines with
large tolerances
Over Current and Short-Circuit Protection
Figure 28: Remote ON/OFF Input Drive Circuit
Remote Sense
Remote sense compensates for voltage drops on the
output by sensing the actual output voltage at the point
of load. The module will compensate for a maximum
drop of 400mV. The remote sense connects as shown
in Figures 29.
This limit includes any increase in voltage due to
remote sense compensation and output voltage set
point adjustment (trim).
o
VIN
Over Temperature Protection (OTP)
The over temperature protection is non-latching and a
temperature sensor monitors the temperature of the PCB
near one the main MOSFETS. If temperature exceeds a
threshold of 130℃(typ.) the converter will shut down.
When the substrate temperature has decreased by 25℃
the converter will automatically restart.
Vo
+SENSE
o
When over current condition occurs, the converter enters
hiccup mode. Ambient temperature influences the current
limit inception point since resistance of MOSFET rises
with temperature. The unit will not be damaged in an over
current condition because it will be protected by the over
temperature protection.
Over Voltage Protection (OVP)
GROUND
The converter will shut down when an output over voltage
is detected. Once the OVP condition is detected, the
controller will stop all PWM outputs and will turn on
low-side MOSFET driver to prevent any damage to load.
-SENSE
GROUND
Contact and Distribution
Losses
Current Sharing (optional)
Figure 29: Effective circuit configuration for remote sense
operation
DS_NC12S60A_02072007
The parallel operation of multiple converters is available
with the NC60 (option code B). The converter will share to
be within +/ - 10% of load. Note the remote sense lines of
the parallel units must be connected at the same point for
proper operation in addition to the current share pins
being connected. Also, units are intended to be turned
on/enabled at the same time. Hot plugging is not
recommended. The current share diagram show in Figure
30.
8
FEATURES DESCRIPTIONS (CON.)
The resistor trim equation for the NC is as follows:
Rset (kΩ) =
NC60A
Where,
Vout is the required voltage setpoint
Rest is the resistance required between TRIM and
Ground
Vout
Cout
+SENSE
12.69 − Vout
Vout − 0.9
-SENSE
GROUND
Rest values should not be less than 1.8 kΩ
I-SHARE
LOAD
TRIM
Output Voltage
NC60A
0
Vout
+SENSE
Cout
-SENSE
GROUND
I-SHARE
Rs(Ω) tol
+0.9 V
OPEN
+1.2 V
38.3K
+1.5 V
18.7K
+1.8 V
12.1K
+2.5 V
6.34K
+3.3 V
3.92K
+5 V
1.87K
TRIM
Figure 30: NC60A Current Share Diagram
Figure 32: Typical Trim Resistor Values
Output Voltage Programming
The voltage trim equation with example is as follows:
The output on the module is trimmable by connecting an
external resistor between the TRIM pin (PIN1) and
ground as per Figure31 and the typical trim values are
shown in Figure 32.
Example:
Set Vt = 1.25V
Vt = 1.25V
The NC60A module has a trim range of 0.9V to 5.0V. A
plot of trim behavior is shown in Figure 33
Rt =
Vout = 2.5V
Rs (13 . 1Vt + Vout − 12 . 69
0 . 9 Rs − VoutRs − Vout + 12 . 69
Rt = 0.72 kΩ
+SENSE
Vout
+SENSE
Vout
Cout
Cout
GROUND
-SENSE
GROUND
-SENSE
Rs
Rs
TRIM
Figure 31: Trimming Output Voltage
DS_NC12S60A_02072007
Rs = 1 kΩ
TRIM
Vt
Rt
Figure 33: Trim Output Voltage – with Voltage Source
9
Voltage Margin Adjusting
THERMAL CONSIDERATION
Output voltage margin adjusting can be implemented in
the NC60A modules by connecting a resistor, R margin-up,
from the Trim pin to the ground pin for adjusting voltage
a little bit higher. Also, the output voltage can be
adjusted lower by connecting a resistor, Rmargin-down, from
the Trim pin to the output pin. Figure 34 shows the
circuit configuration for output voltage margin adjusting.
The electrical operating conditions of the NC, namely:
Vt
+SENSE
Vout
Input voltage, Vin
Output voltage, Vo
● Output current, Io
●
●
Determine how much power is dissipated within the
converter. The following parameters further influence the
thermal stresses experienced by the converter:
Rmargin-down
Cout
Ambient temperature
Air velocity
● Thermal efficiency of the end system application
● Parts mounted on system PCB that may block airflow
● Real airflow characteristics at the converter location
●
GROUND
-SENSE
●
Rs
TRIM
Rmargin-up
0
Figure 34: Circuit configuration for output voltage margining
Output Capacitance
An external output capacitor is required for stable
operation.
Reflected Ripple Current and Output Ripple
and Noise Measurement
The measurement set-up outlined in Test Configuration
Figure 35 have been used for both input
reflected/terminal ripple current and output voltage
ripple and noise measurements on NC series
converters.
In order to simplify the thermal design, a number of thermal
de-rating plots are provided. These de-rating graphs show
the load current of the NC versus the ambient air
temperature and air flow. However, since the thermal
performance is heavily dependent upon the final system
application, the user needs to ensure the thermal reference
point temperatures are kept within the recommended
temperature rating. It is recommended that the thermal
reference point temperatures are measured using a
thermocouple or an IR camera. In order to comply with
stringent Delta de-rating criteria, the ambient temperature
should never exceed 85℃. Please contact Delta for further
support..
The maximum acceptable temperature measured at the
thermal reference point is 127℃. This is shown in Figure
36.
PWB
FACING PWB
Input reflected current measurement point
Vin+
1
Ltest
2
LOAD
DC-DC Converter
Cs
Cin
Cout
100nF
Ceramic
MODULE
10uF
Tantalum
Output voltage ripple noise measurement point
Cs=270uF*1 Ltest=1.4uH Cin=270uF*3 Cout=680uF*4
Figure 35:Input Reflected Ripple/Capacitor Ripple Current
and Output Voltage Ripple and Noise Measurement Set-Up for
NC60A
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
50.8 (2.0”)
AIR FLOW
19 (0.75”)
38 (1.5”)
Note: Wind Tunnel Test Setup
DS_NC12S60A_02072007
10
THERMAL CURVES (NC12S0A0V60)
NC12S0A0V60 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout =1.8V (Either Orientation)
Output Current (A)
60
50
40
Natural
Convection
100LFM
30
200LFM
300LFM
20
400LFM
500LFM
10
600LFM
0
25
Figure 36: Temperature measurement location
* The allowed maximum hot spot temperature is defined at 127℃
55
65
75
85
Ambient Temperature (℃)
NC12S0A0V60 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout =0.9V (Either Orientation)
NC12S0A0V60 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout =5V (Either Orientation)
Output Current (A)
60
60
50
50
40
Natural
Convection
45
Figure 39: Output current vs. ambient temperature and air
[email protected] Vout=1.8V(Either Orientation)
Output Current (A)
40
35
Natural
Convection
100LFM
100LFM
30
30
200LFM
200LFM
300LFM
300LFM
20
20
400LFM
400LFM
500LFM
500LFM
10
10
600LFM
0
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 37: Output current vs. ambient temperature and air
[email protected] Vout=5V(Either Orientation)
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 40: Output current vs. ambient temperature and air
[email protected] Vout=0.9V(Either Orientation)
NC12S0A0V60 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout =3.3V (Either Orientation)
Output Current (A)
60
50
40
Natural
Convection
100LFM
30
200LFM
300LFM
20
400LFM
500LFM
10
600LFM
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 38: Output current vs. ambient temperature and air
[email protected] Vout=3.3V(Either Orientation)
DS_NC12S60A_02072007
11
MECHANICAL DRAWING
VERTICAL
DS_NC12S60A_02072007
12
PART NUMBERING SYSTEM
NC
12
S
0A0
V
60
P
N
Product
Series
Input
Voltage
Number of
outputs
Output
Voltage
Mounting
Output
Current
ON/OFF
Logic
Pin
Length
NC-
12-
S- Single
Non-isolated 11.04~12.6V
output
0A0-
V- Vertical
60- 60A
programmable
F
A
Option Code
P- Positive R- 0.118”
F- RoHS 6/6
N- Negative N- 0.140”
(Lead Free)
A- Standard
Functions
Converter
MODEL LIST
Model Name
Packaging
Input Voltage
Output Voltage
Output Current
Efficiency
12Vin @ 100% load
NC12S0A0V60PNFA
Vertical
11.04~12.6Vdc
0.9 V~ 5.0Vdc
60A
95% (5.0V)
CONTACT: www.delta.com.tw/dcdc
USA:
Telephone:
East Coast: (888) 335 8201
West Coast: (888) 335 8208
Fax: (978) 656 3964
Email: [email protected]
Europe:
Telephone: +41 31 998 53 11
Fax: +41 31 998 53 53
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107 x6220
Fax: +886 3 4513485
Email: [email protected]
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.
DS_NC12S60A_02072007
13