DELTA NC12S0A0H15PNFA

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 (US & Canada) Recognized,
and TUV (EN60950) Certified
Delphi NC15 Series Non-Isolated Point of Load
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_02072007
TECHNICAL SPECIFICATIONS
(Ambient Temperature=25°C, minimum airflow=200LFM, nominal Vin=12Vdc unless otherwise specified.)
PARAMETER
NOTES and CONDITIONS
NC12S0A0V/H15
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Operating Temperature (Vertical)
Operating Temperature (Horizontal)
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 Ripple Rejection
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
Output Short-Circuit Current
DYNAMIC CHARACTERISTICS
Output 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 power
Minimum Output Capacitance
Maximum Output Startup Capacive 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
GENERAL SPECIFICATIONS
MTBF
Weight
NC12S15A_02012007
With appropriate air flow and derating, see Figs 33
With appropriate air flow and derating, see Figs 39
Typ.
-40
-40
-40
Non-isolated
Max.
Units
14
130
125
125
Vdc
°C
°C
°C
V
13.8
V
NA
10.2
12.0
9.0
7.5
1.5
100% Load, 10.2Vin, 5.0Vout
Vin=12V, Vout=0.9V
Remote OFF
Refer to Figure 31.
120Hz
With a 1.0% trim resistor
Io=Io_min to Io_max
Vin=Vin_min to Vin_max
5Hz to 20MHz bandwidth
Full Load, 100nF ceramic, 10µF tantalum
Full Load, 100nF ceramic, 10µF tantalum
Vin=12V, Turn ON
Vin=12V, Turn OFF
Hiccup mode
Hiccup mode
8.1
65
9
150
45
0.9
-2.5
5.0
+2.5
V
%
-1.0
-0.2
+1.0
+0.2
%
%
0
50
20
15
1
100
mV
mV
A
%
mV
A
100
100
200
mV
mV
µs
10
10
ms
ms
µF
µF
µF
16
12Vin, 100nF ceramic, 10µF tantalum load cap, 10A/µs
50% Io_max to 75% Io_max
75% Io_max to 50% Io_max
Settling to be within regulation band (Vo +/- 2.5%)
From Enable high to 10% of Vo
From Vin=12V to 10% of Vo
Ex: OSCON 6.3V/680µF (ESR 13 mΩ max.)
Full Load
Ex: OSCON 16V/270µF (ESR 18 mΩ max.)
V
V
V
A
mA
mA
mA
dB
680
6800
270
Vin=12V, Io=15A
Vin=12V, Io=15A
Vin=12V, Io=15A
Vin=12V, Io=15A
Vin=12V, Io=15A
Vin=12V, Io=15A
Vin=12V, Io=15A
75
79
81
84
87
89
91
%
%
%
%
%
%
%
fixed
Positive logic (internally pulled high)
Module On (or leave the pin open)
Module Off
300
KHz
Telcordia SR-332 Issue1 Method1 Case3 at 50°C
2.4
0
5.5
0.8
2.1
16.5
V
V
M hours
grams
2
90
90
80
80
70
70
60
60
Efficiency (%)
Efficiency (%)
ELECTRICAL CHARACTERISTICS CURVES
50
40
30
50
40
30
20
20
12
10.2
10
13.8
0
1
2
3
4
5
6
7
8
0
9 10 11 12 13 14 15
1
2
3
4
Figure 1: Converter efficiency vs. output current
(0.9V output voltage)
90
80
80
70
70
Efficiency (%)
100
90
60
50
40
30
12
10.2
10
6
7
8
9 10 11 12 13 14 15
Figure 2: Converter efficiency vs. output current
(1.2V output voltage)
100
20
5
Output Current (A)
Output Current (A)
Efficiency (%)
13.8
0
0
60
50
40
30
20
13.8
12
10.2
10
13.8
0
0
0
1
2
3
4
5
6
7
8
0
9 10 11 12 13 14 15
1
2
3
4
Figure 3: Converter efficiency vs. output current
(1.8V output voltage)
90
80
80
70
70
Efficiency (%)
100
90
60
50
40
30
12
10.2
10
6
7
8
9 10 11 12 13 14 15
Figure 4: Converter efficiency vs. output current
(2.5V output voltage)
100
20
5
Output Current (A)
Output Current (A)
Efficiency (%)
12
10.2
10
13.8
60
50
40
30
20
12
10.2
10
13.8
0
0
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
Output Current (A)
Figure 5: Converter efficiency vs. output current
(3.3V output voltage)
NC12S15A_02012007
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
Output Current (A)
Figure 6: Converter efficiency vs. output current
(5.0V output voltage)
3
ELECTRICAL CHARACTERISTICS CURVES
Figure 7: Output ripple & noise at 12Vin, 0.9V/15A out
Figure 8: Output ripple & noise at 12Vin, 1.2V/15A out
Figure 9: Output ripple & noise at 12Vin, 1.8V/15A out
Figure 10: Output ripple & noise at 12Vin, 2.5V/15A out
Figure 11: Output ripple & noise at 12Vin, 3.3V/15A out
Figure 12: Output ripple & noise at 12Vin, 5.0V/15A out
NC12S15A_02012007
4
ELECTRICAL CHARACTERISTICS CURVES
Figure 13: Turn on delay time at 12Vin, 0.9V/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 15: Turn on delay time at 12Vin, 2.5V/15A out
Ch2:Vin 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
Figure 18: Turn on delay time at Remote On/Off, 5.0V/15A out
Ch2:ENABLE Ch3:Vout Ch4:PWRGD
NC12S15A_02012007
5
ELECTRICAL CHARACTERISTICS CURVES
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, 0.9V 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, 1.2V 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, 2.5V 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, 5.0V out
NC12S15A_02012007
6
DESIGN CONSIDERATIONS
FEATURES DESCRIPTIONS
The NC15 is a single phase and voltage mode controlled
Buck topology. Block diagram of the converter is shown in
Figure 23. The output can be trimmed in the range of
0.9Vdc to 5.0Vdc by a resistor from Trim pin to Ground.
ENABLE (On/Off)
The converter can be turned ON/OFF by remote control.
Positive on/off (ENABLE pin) logic implies that the
converter DC output is enabled when this signal is driven
high (greater than 2.4V) or floating and disabled when the
signal is driven low (below 0.8V). Negative on/off logic is
optional and could also be ordered.
The converter provides an open collector signal called
Power Good. The power good signal is pulled low when
output is not within ±10% of Vout or Enable is OFF.
The converter can protect itself by entering hiccup mode
against over current and short circuit condition. Also, the
converter will shut down when an over voltage protection
is detected.
The ENABLE (on/off) input allows external circuitry to put
the NC converter into a low power dissipation (sleep)
mode. Positive (active-high) ENABLE is available as
standard.
Positive ENABLE (active-high) units of the NC series are
turned on if the ENABLE pin is high or floating. Pulling the
pin low will turn off the unit. With the active high function,
the output is guaranteed to turn on if the ENABLE pin is
driven above 2.4V. The output will turn off if the ENABLE
pin voltage is pulled below .8V.
The ENABLE input can be driven in a variety of ways as
shown in Figures 24, 25 and 26. If the ENABLE signal
comes from the primary side of the circuit, the ENABLE
can be driven through either a bipolar signal transistor
(Figure 24) or a logic gate (Figure 25). If the enable signal
comes from the secondary side, then an opto-coupler or
other isolation devices must be used to bring the signal
across the voltage isolation (please see Figure 26).
NC6A/15A/20A
Vin
Figure 23: Block Diagram
It is recommended that the user to provide a very
fast-acting type fuse in the input line for safety. The output
voltage set-point and the output current in the application
could define the current rating of the fuse.
Enable
Trim
Ground
Ground
Figure 24: Enable Input drive circuit for NC series
5V
Safety Considerations
Vout
NC6A/15A/20A
Vin
Vout
Enable
Trim
Ground
Ground
Figure 25: Enable input drive circuit using logic gate.
NC6A/15A/20A
Vin
Enable
Ground
Vout
Trim
Ground
Figure 26: Enable input drive circuit example with isolation.
NC12S15A_02012007
7
FEATURES DESCRIPTIONS (CON.)
Input Under-Voltage Lockout
The input under-voltage lockout prevents the converter
from being damaged while operating when the input
voltage is too low. The lockout occurs between 7.0V to
8.0V.
Over-Current and Short-Circuit Protection
The NC series modules have non-latching over-current
and short-circuit protection circuitry. When over current
condition occurs, the module goes into the non-latching
hiccup mode. When the over-current condition is
removed, the module will resume normal operation.
An over current condition is detected by measuring the
voltage drop across the high-side MOSFET. The voltage
drop across the MOSFET is also a function of the
MOSFET’s Rds(on). Rds(on) is affected by temperature,
therefore ambient temperature will affect the current limit
inception point. Please see the electrical characteristics
for details of the OCP function.
The NC06/NC15/NC20 module has a trim range of 0.9V
to 5.0V. The trim resistor equation for the NC6A/NC15A/
NC20A is :
Rs (Ω) =
1170
Vout − 0.9
Vout is the output voltage setpoint
Rs is the resistance between Trim and Ground
Rs values should not be less than 280Ω
Output Voltage
Rs (Ω)
+0.9 V
+1.2 V
+1.5 V
+1.8 V
+2.5 V
+3.3 V
+5.0 V
OPEN
3.92K
1.96K
1.3K
732
487
287
Figure 28: Typical trim resistor values
NC6A/15A/20A
Vout
The detection of the Rds(on) of the high side MOSFET
also acts as an over temperature protection since high
temperature will cause the Rds(on) of the MOSFET to
increase, eventually triggering over-current protection.
Vin
Output Voltage Programming
Ground
The output voltage of the NC series is trimmable by
connecting an external resistor between the trim pin and
output ground as shown Figure 27 and the typical trim
resistor values are shown in Figure 28. The output can
also be set by an external voltage connected to trim pin as
shown in Figure 29.
1.3K
Enable
Trim
Rt
Vt
Rs
Ground
Figure 29: Output voltage trim with voltage source
To use voltage trim, the trim equation for the
NC6A/NC15A/ NC20A is (please refer to Fig. 29) :
Rt (kΩ) =
Rs (1.3Vt − 1.17)
1.17 − Rs(Vout − 0.9)
NC6A/15A/20A
Vout
Vin
Trim
Enable
Rs
Ground
Ground
Vout is the desired output voltage
Vt is the external trim voltage
Rs is the resistance between Trim and Ground (in KΩ)
Rt is the resistor to be defined with the trim voltage (in KΩ)
Below is an example about using this voltage trim
equation :
Figure 27: Trimming Output Voltage
Example:
If Vt = 1.25V, desired Vout = 2.5V and Rs = 0.715KΩ
Rt ( KΩ) =
NC12S15A_02012007
Rs (1.3Vt − 1.17)
= 12.51KΩ
1.17 − Rs(Vout − 0.9)
8
FEATURES DESCRIPTIONS (CON.)
Output Capacitance
Power Good
There is no output capacitor on the NC series modules.
Hence, an external output capacitor is required for stable
operation. For NC15 modules, an external 6.3V/680µF
low ESR capacitor (for example, OSCON) is required for
stable operation.
The converter provides an open collector signal called
Power Good. This output pin uses positive logic and is
open collector. This power good output is able to sink
5mA and set high when the output is within ±10% of
output set point.
The power good signal is pulled low when output is not
within ±10% of Vout or Enable is OFF.
Current Sink Capability
The NC series converters are able to sink current as well
as function as a current source. It is able to sink the full
output current at any output voltage up to and including
2.5V. This feature allows the NC series fit into any
voltage termination application.
Voltage Margining Adjustment
Output voltage margin adjusting can be implemented in
the NC modules by connecting a resistor, Rmargin-up, from
the Trim pin to the Ground for for margining up the output
voltage. Also, the output voltage can be adjusted lower
by connecting a resistor, Rmargin-down, from the Trim pin to
the voltage source Vt. Figure 30 shows the circuit
configuration for output voltage margining adjustment.
It is important to places these low ESR capacitors as
close to the load as possible in order to get improved
dynamic response and better voltage regulation,
especially when the load current is large. Several of these
low ESR capacitors could be used together to further
lower the ESR.
Please refer to individual datasheet for the maximum
allowed start-up load capacitance for each NC series as it
is varied between series.
Reflected Ripple Current and Output Ripple and
Noise Measurement
The measurement set-up outlined in Figure 31 has been
used for both input reflected/ terminal ripple current and
output voltage ripple and noise measurements on NC
series converters.
Vt
NC6A/15A/20A
Vout
Vin
Rmargin-down
Trim
Enable
Rmargin-up
Rs
Ground
Cs=270µF*1, Ltest=1.4µH, Cin=270µF*1, Cout=680µF *1
Ground
Figure 31: Input reflected ripple/ capacitor ripple current and
output voltage ripple and noise measurement setup for NC15
Figure 30: Circuit configuration for output voltage margining
Paralleling
NC06/NC15/NC20 converters do not have built-in current
sharing (paralleling) ability. Hence, paralleling of multiple
NC06/NC15/NC20 converters is not recommended.
NC12S15A_02012007
9
THERMAL CONSIDERATION
Thermal management is an important part of the
system design. To ensure proper, reliable operation,
sufficient cooling of the power module is needed over
the entire temperature range of the module.
Convection cooling is usually the dominant mode of
heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments encountered in most electronics
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in
which the power modules are mounted.
The following figure shows the wind tunnel
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The space between the neighboring PWB
and the top of the power module is constantly kept at
6.35mm (0.25’’).
Thermal Derating
Heat can be removed by increasing airflow over the
module. To enhance system reliability, the power
module should always be operated below the
maximum operating temperature. If the temperature
exceeds the maximum module temperature, reliability
of the unit may be affected.
NC12S15A_02012007
10
THERMAL CURVES (NC12S0A0V15)
NC12S0A0V15 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout = 3.3V (Either Orientation)
PWB
FACING PWB
Output Current(A)
15
MODULE
12
Natural
Convection
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
9
100LFM
200LFM
6
50.8 (2.0”)
300LFM
400LFM
AIR FLOW
3
17.5 (0.69”)
35 (1.38”)
Note: Wind Tunnel Test Setup Figure Dimensions are in
millimeters and (Inches)
Figure 32: Wind tunnel test setup
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 35: Output current vs. ambient temperature and air
velocity@ Vout=3.3V(Either Orientation)
NC12S0A0V15 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout = 1.8V (Either Orientation)
Output Current(A)
15
12
Natural
Convection
9
100LFM
200LFM
6
300LFM
3
0
25
Figure 33: Temperature measurement location
* The allowed maximum hot spot temperature is defined at 130℃
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 36: Output current vs. ambient temperature and air
velocity@ Vout=1.8V(Either Orientation)
NC12S0A0V15 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout = 0.9V (Either Orientation)
NC12S0A0V15 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout = 5V (Either Orientation)
Output Current(A)
Output Current(A)
15
15
12
12
Natural
Convection
Natural
Convection
9
9
100LFM
100LFM
200LFM
200LFM
6
6
300LFM
300LFM
400LFM
3
3
0
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 34: Output current vs. ambient temperature and air
[email protected]=5V(Either
Orientation)
NC12S15A_02012007
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 37: Output current vs. ambient temperature and air
velocity@ Vout=0.9V(Either Orientation)
11
THERMAL CURVES (NC12S0A0H15)
NC12S0A0H15 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout =3.3V (Either Orientation)
PWB
FACING PWB
Output Current(A)
15
MODULE
12
Natural
Convection
9
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
100LFM
200LFM
6
300LFM
50.8 (2.0”)
AIR FLOW
3
0
25
9.5 (0.37”)
19 (0.75”)
Note: Wind Tunnel Test Setup Figure Dimensions are in
millimeters and (Inches)
Figure 38: Wind tunnel test setup
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 41: Output current vs. ambient temperature and air
velocity@ Vout=3.3V(Either Orientation)
NC12S0A0H15 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout =1.8V (Either Orientation)
Output Current(A)
15
12
Natural
Convection
9
100LFM
200LFM
6
3
0
25
Figure 39: Temperature measurement location
* The allowed maximum hot spot temperature is defined at 125℃
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 42: Output current vs. ambient temperature and air
velocity@ Vout=1.8V(Either Orientation)
NC12S0A0H15 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout =0.9V (Either Orientation)
NC12S0A0H15 (Standard) Output Current vs. Ambient Temperature and Air Velocity
@ Vout =5V (Either Orientation)
Output Current(A)
Output Current(A)
15
15
12
12
Natural
Convection
9
Natural
Convection
9
100LFM
100LFM
200LFM
200LFM
6
6
300LFM
400LFM
3
3
0
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 40: Output current vs. ambient temperature and air
velocity @Vout=5V(Either Orientation)
NC12S15A_02012007
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 43: Output current vs. ambient temperature and air
velocity@ Vout=0.9V(Either Orientation)
12
MECHANICAL DRAWING
VERTICAL
NC12S15A_02012007
HORIZONTAL
13
PART NUMBERING SYSTEM
NC
12
S
0A0
V
15
P
N
Product
Series
Input
Voltage
Number of
outputs
Output
Voltage
Mounting
Output
Current
ON/OFF
Logic
Pin
Length
NC-
12-
Non-isolated
10.2~13.8V output
S- Single
0A0-
H- Horizontal 15 - 15A
P- Positive
programmable
V- Vertical
N- Negative N- 0.14”
R- 0.118”
F
A
Option
Code
F- RoHS 6/6 A- Standard
(Lead Free)
function.
Converter
MODEL LIST
Model Name
Packaging
Input Voltage
Output Voltage
Output Current
Efficiency
12Vin @ 100% load
NC12S0A0V15PNFA
Vertical
10.2 ~ 13.8Vdc
0.9 V ~ 5.0Vdc
15A
91% (5.0V)
NC12S0A0H15PNFA
Horizontal
10.2 ~ 13.8Vdc
0.9 V ~ 5.0Vdc
15A
91% (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.
NC12S15A_02012007
14