D12S05020-1

FEATURES
 High Efficiency: 93.4% @ 12Vin, 5V/20A out
 Size: 30.5x15.5x12.0mm (1.20”x0.61”x0.46”)
 Wide input range: 4.5V~13.2V
 Output voltage programmable from 0.59Vdc to
5.0Vdc via external resistors
 No minimum load required
 Fixed frequency operation
 Input UVLO, output OCP, SCP, OVP
 Remote On/Off (Positive logic)
 Power Good Function
 Parts/assembly comply with ROHS
 ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing facility
Delphi D12S05020-1 Non-Isolated Point of
Load
OPTIONS
DC/DC Modules: 4.5V~13.2Vin, 0.59V~5.0Vout, 20A
The Delphi D12S05020-1 Series, 4.5V to 13.2V wide input, wide trim,
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 D12S05020-1
product family is part of the second generation, non-isolated
point-of-load DC/DC power modules for the data communication
applications which cut the module size by almost 50% in most of the
cases compared to the first generation NC series POL modules. The
D12S05020-1 product family provides an ultra wide input range to
support 5V, 8V, 9.6V, and 12V bus voltage point-of-load applications
and it offers 20A of output current in a vertically mounted through-hole
miniature package and the output can be resistor trimmed from
0.59Vdc to 5.0Vdc. 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.
DATASHEET
DS_D12S05020-1_12022009
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APPLICATIONS

Data Communications

Distributed power architectures

Servers and workstations

LAN/WAN applications

Data processing applications
TECHNICAL SPECIFICATIONS
(Ambient Temperature=25°C, minimum airflow=200LFM, nominal Vin=12Vdc unless otherwise specified.)
PARAMETER
NOTES and CONDITIONS
D12S05020-1
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Operating Temperature
Storage Temperature
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Maximum Input Current
No-Load Input Current
Off Converter Input Current
OUTPUT CHARACTERISTICS
Output Voltage Adjustment Range
Output Voltage Set Point
Total output range
Output Voltage Ripple and Noise
Peak-to-Peak
Output Current Range
Output Voltage Over-shoot at Power-On
Output Voltage Under-shoot at Power-Off
Output DC Current-Limit Inception
Over Voltage Protection
Under Voltage Protection
DYNAMIC CHARACTERISTICS
Output Dynamic Load Response
Turn-On Transient
Rise Time
Turn on Delay (Remote on/off)
Minimum Output Capacitance
EFFICIENCY
Vo=0.59V
Vo=0.9V
Vo=1.1V
Vo=1.2V
Vo=1.5V
Vo=2.5V
Vo=3.3V
Vo=5.0V
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control
Logic High
Logic Low
Power Good Delay
Power Good Signal
GENERAL SPECIFICATIONS
Calculated MTBF
Weight
Airflow dependent, refer to thermal de-rating curves in Figure 28~35
Max.
Units
-0.3
0
-40
13.2
85
125
V
°C
°C
4.5
13.2
V
For 5V output the input minimum is 6.5V
4.5
4.0
Vin=6.5V, Vo=5.0V, Io=20A
Vin=5V, Vo=3.3V, Io=20A
Vin=12V, Vo=5.0V, Io=0A
Remote OFF
With a 0.1% trim resistor
Over load, line, temperature regulation and set point
OSCON 680uF x2, 5Hz to 20MHz bandwidth
Full Load, 12Vin, 5Vo
Typ.
16.5
14.7
60
10
0.59
-2
-3.0
5.0
+2
+3.0
V
%Vo
%Vo
20
20
30
115
115
mVpk-pk
A
Vo
mV
A
%
%
150
99
75
45
26
22
22
mVpk
mVpk
mVpk
mVpk
mVpk
mVpk
mVpk
10
0
OSCON 680uF x2,
Vin=12V, Turn OFF, OSCON 680uF x2,
Hiccup mode
Hiccup mode
Hiccup mode
0.5%
100
Output step load 10A to 20A, 10A/usec
Vo=5.0V, 1360µF output capacitance
Vo=3.3V, 1360µF output capacitance
Vo=2.5V, 1360µF output capacitance
Vo=1.5V, 1360µF output capacitance
Vo=1.2V, 3280µF output capacitance
Vo=0.9V, 3280µF output capacitance
Vo=0.59V, 3280µF output capacitance
From 10% to 90% of Vo
Vin=12V, Io=min-max. (With 10% of Vo)
V
V
A
A
mA
mA
3
1300
5
5
5000
ms
ms
µF
Vin=12V, Io=20A
Vin=12V, Io=20A
Vin=12V, Io=20A
Vin=12V, Io=20A
Vin=12V, Io=20A
Vin=12V, Io=20A
Vin=12V, Io=20A
Vin=12V, Io=20A
76.8
82.1
83.8
85.1
86.6
89.7
90.4
93.4
%
%
%
%
%
%
%
%
Fixed
Positive logic (internally pulled high)
Module On (or leave the pin open)
Module Off
All conditions (within 90% of Vo)
Vo is outside +/-10% of Vo, set
Vo is Within +/-10% of Vo,set
600
KHz
25℃, 300LFM, 80% load
1.2
0.8
6
0.4
5.0
0
6.33
8.8
V
V
ms
V
V
Mhours
grams
DS_D12S05020-1_12022009
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ELECTRICAL CHARACTERISTICS CURVES
95
95
90
Efficiency (%)
Efficiency (%)
100
100
90
85
80
75
70
85
80
75
70
65
65
60
60
0
0
2
4
6
8
10
12
14
16
18
2
4
6
8
20
Load (A)
Figure 1: Converter efficiency vs. output current
(5.0V output voltage, 12V input)
(%) (%)
Efficiency
Efficiency
Efficiency (%)
95
90
85
60
60
70
6
8
10
12
14
16
18
20
0
0
2
4
6
2
4
6
8
95
90
90
Efficiency (%)
Efficiency (%)
100
95
85
80
75
70
14
18
16
20
18
20
70
60
12
16
75
60
10
14
80
65
8
12
85
65
6
20
Figure 4: Converter efficiency vs. output current
(1.5V output voltage, 12V input)
100
4
18
Load (A)
Figure 3: Converter efficiency vs. output current
(2.5V output voltage, 12V input)
2
10
Load (A)
8
10
12
Load (A)
0
16
85
90
80
85
65
75
4
14
100
100
95
95
90
75
80
70
75
65
70
60
65
80
2
12
Figure 2: Converter efficiency vs. output current
(3.3V output voltage, 12V input)
100
0
10
Load (A)
14
16
Load (A)
Figure 5: Converter efficiency vs. output current
(1.2V output voltage, 12V input)
18
20
0
2
4
6
8
10
12
14
16
18
20
Load (A)
Figure 6: Converter efficiency vs. output current
(0.9V output voltage, 12V input)
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ELECTRICAL CHARACTERISTICS CURVES (CONTINUED)
Figure 7: Output ripple & noise at 12Vin, 5.0V/20A out
Figure 8: Output ripple & noise at 12Vin, 3.3V/20A out
Figure 9: Output ripple & noise at 12Vin, 2.5V/20A out
Figure 10: Output ripple & noise at 12Vin, 1.5V/20A out
Figure 11: Output ripple & noise at 12Vin, 1.2V/20A out
Figure 12: Output ripple & noise at 12Vin, 0.9V/20A out
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ELECTRICAL CHARACTERISTICS CURVES (CONTINUED)
Figure 13: Control turn on at 12Vin, 5.0V /20A
Ch1: Enable, Ch3: Vo, Ch2: PG
Figure 14: Control turn on at 12Vin, 3.3V /20A
Ch1: Enable, Ch3: Vo, Ch2: PG
Figure 15: Control turn on at 12Vin, 2.5V /20A
Ch1: Enable, Ch3: Vo, Ch2: PG
Figure 16: Control turn on at 12Vin, 1.5V /20A
Ch1: Enable, Ch3: Vo, Ch2: PG
Figure 17: Control turn on at 12Vin, 1.2V /20A
Ch1: Enable, Ch3: Vo, Ch2: PG
Figure 18: Control turn on at 12Vin, 0.9V /20A
Ch1: Enable, Ch3: Vo, Ch2: PG
DS_D12S05020-1_12022009
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ELECTRICAL CHARACTERISTICS CURVES (CONTINUED)
Figure 19: Transient response, 5.0V /20A, Ch1: Vo
Figure 20: Transient response, 3.3V /20A, Ch1: Vo
Figure 21: Transient response, 2.5V /20A, Ch1: Vo
Figure 22: Transient response, 1.5V /20A, Ch1: Vo
Figure 23: Transient response, 1.2V /20A, Ch1: Vo
Figure 24: Transient response, 0.9V/20A, Ch1: Vo
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DESIGN CONSIDERATIONS
FEATURES DESCRIPTIONS
The D12S05020-1 series uses a single phase and
voltage mode controlled buck topology. The output can
be adjusted in the range of 0.59Vdc to 5.0Vdc by a
resistor from Trim pin to ground.
Enable (On/Off)
The converter can be turned ON/OFF by remote control
with positive on/off (ENABLE pin) logic. The converter
DC output is disabled when the signal is driven low
(below 0.8V). The module will turn on when this pin is
floating and the input voltage is higher than the
threshold.
The ENABLE (on/off) input allows external circuitry to
put the D12S05020-1 series converter into a low power
dissipation (sleep) mode. Positive ENABLE is available
as standard. With the active high function, the output is
guaranteed to turn on if the ENABLE pin is driven above
1.2V. The output will turn off if the ENABLE pin voltage is
pulled below 0.8V.
The ENABLE input can be driven in a variety of way as
shown in Figures 25.
The converter can protect itself by entering hiccup mode
against over current, short circuit, and over voltage
condition.
Unit
Safety Considerations
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 amperage rating of the fuse.
Vin
Vout
Enable
Trim
GND
GND
Figure 25. Enable Input drive circuit for D12S05020
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 4.0V to
4.3V.
Output Capacitance
The D12S05020-1 requires minimum 1300uF output
capacitor for stable operation.
Power Good
The converter provides an open collector signal called
Power Good. The converter will sink less than 1uA as a
logic high and sink at least 1mA as a logic low. A logic
low must be less than 0.4V while sinking 1mA.
The power good signal is pulled low when an input
under voltage, output over voltage or output over
current conditions is detected or when the converter is
disabled by ENABLE.
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FEATURES DESCRIPTIONS (CON.)
Over-Current and Short-Circuit Protection
Output Voltage Programming
The D12S05020-1 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.
The output voltage of the D12S05020-1 series is adjusted
by connecting an external resistor between the trim pin
and output ground as shown Figure 26 and the typical
trim resistor values are shown in Table 1.
Unit
An over current condition is detected by measuring the
voltage drop across the MOSFETs. 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.
Vin
Vout
Enable
Trim(+)
Rtrim
GND
Output Over Voltage Protection (OVP)
The converter will shut down when an output over voltage
protection is detected. Once the OVP condition is detected,
controller will stop all PWM outputs, turn on low-side MOSFET
and pull low the PGOOD signal to prevent any damage to
load.
Paralleling
D12S05020-1 series converters do not have built-in
current sharing (paralleling) ability. Hence, paralleling of
multiple D12S05020-1 series converters is not
recommended.
GND
Figure 26: Trimming Output Voltage
The D12S05020-1 series module has a trim range of
0.59V to 5.0V. The trim resistor equation for the
D12S05020 series is:
Rtrim() 
1.18
Vout  0.59
Vout is the output voltage set point
Rtrim is the resistance between Trim and Ground
Rtrim values should not be less than 240Ω and shall be
with 0.1% or better tolerance.
Output Voltage
Rtrim (Ω)
0.59V
0.9 V
1.1 V
1.2 V
1.5 V
2.5V
3.3V
5.0V
open
3.83k
2.32K
1.94K
1.30K
618
435
267
Table 1: Typical trim resistor values
DS_D12S05020-1_12022009
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THERMAL CONSIDERATION
THERMAL CURVES
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’’).
Figure 28: Temperature measurement location* The allowed
maximum hot spot temperature is defined at 125℃
D12S05020-1 Series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =5V (Worse Orientation)
Output Current (A)
25
20
Natural
Convection
15
100LFM
10
Thermal Derating
200LFM
400LFM
300LFM
500LFM
5
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.
PWB
FACING PWB
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 29: Output current vs. ambient temperature and air
velocity @Vin=12V, Vout=5.0V (Worse Orientation)
D12S05020-1 Series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =3.3V (Worse Orientation)
Output Current (A)
25
MODULE
20
15
Natural
Convection
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
10
100LFM
300LFM
200LFM
400LFM
50.8 (2.0”)
AIR FLOW
5
0
12.7 (0.5”)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 30: Output current vs. ambient temperature and air
[email protected] Vin=12V, Vout=3.3V (Worse Orientation)
Figure 27: Wind tunnel test setup
DS_D12S05020-1_12022009
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THERMAL CURVES (D12S05020-1)
D12S05020-1 Series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =2.5V (Worse Orientation)
D12S05020-1 Series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =1.2V (Worse Orientation)
Output Current (A)
Output Current (A)
25
25
20
20
15
15
Natural
Convection
Natural
Convection
10
10
5
100LFM
300LFM
200LFM
400LFM
5
0
100LFM
300LFM
200LFM
400LFM
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 31: Output current vs. ambient temperature and air
[email protected] Vin=12V, Vout=2.5V (Worse Orientation)
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 34: Output current vs. ambient temperature and air
[email protected] Vin=12V, Vout=1.2V (Worse Orientation)
D12S05020-1 Series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =1.8V (Worse Orientation)
D12S05020-1 Series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =1.1V (Worse Orientation)
Output Current (A)
Output Current (A)
25
25
20
20
15
15
Natural
Convection
10
Natural
Convection
10
100LFM
300LFM
200LFM
400LFM
200LFM
100LFM
5
300LFM
5
0
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 32: Output current vs. ambient temperature and air
velocity @Vin=12V, Vout=1.8V (Worse Orientation)
25
D12S05020-1 Series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =1.5V (Worse Orientation)
55
65
75
85
Ambient Temperature (℃)
D12S05020-1 Series Output Current vs. Ambient Temperature and Air Velocity
@ Vin =12V, Vout =0.9V (Worse Orientation)
Output Current (A)
Output Current (A)
25
20
20
15
Natural
Convection
10
45
Figure 35: Output current vs. ambient temperature and air
velocity @Vin=12V, Vout=1.1V (Worse Orientation)
25
15
35
100LFM
300LFM
200LFM
400LFM
Natural
Convection
200LFM
100LFM
300LFM
10
5
5
0
0
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 33: Output current vs. ambient temperature and air
[email protected] Vin=12V, Vout=1.5V (Worse Orientation)
25
35
45
55
65
75
85
Ambient Temperature (℃)
Figure 36: Output current vs. ambient temperature and air
velocity @Vin=12V, Vout=0.9 V (Worse Orientation)
DS_D12S05020-1_12022009
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MECHANICAL DRAWING
PIN#
Function
1
Vout
2
TRIM
3
GND
4
PG
5
ENABLE
6
Vin
7
6
8
SENSE+
SENSE-
DS_D12S05020-1_12022009
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D12S05020-1 SERIES MODEL LIST
Model Name
Input Voltage Output Voltage Output Current 5Vout OCP typical
Lead Free
Pin Length
D12S05020-1 A
4.5V ~ 13.2V
0.59V ~ 5.0V
20A
30A
RoHs 5
3.50 mm
D12S05020-1 B
4.5V ~ 13.2V
0.59V ~ 5.0V
20A
32A
RoHs 5
3.80 mm
D12S05020-1 C
4.5V ~ 13.2V
0.59V ~ 5.0V
20A
30A
RoHs 6
3.80 mm
D12S05020-1 D
4.5V ~ 13.2V
0.59V ~ 5.0V
20A
30A
RoHs 6
3.50 mm
D12S05020-1 E
4.5V ~ 13.2V
0.59V ~ 5.0V
20A
32A
RoHs 6
3.80 mm
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: [email protected]
Europe:
Telephone: +31-20-655-0967
Fax: +31-20-655-0999
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107 ext. 6220~6224
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_D12S05020-1_12022009
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