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TECHNICAL DATASHEET
Rev A
HP12S24-600
600W DC-DC Converter
10-36 Vdc Input
24Vdc Single Output at 25A
FEATURES:
 High Power Density
 Low Input Voltage Capability
 Wide Input Range
 Fast Transient Response
 Remote Sense
 Enable/Disable Pin
 ±10% Trim Capability
 High Efficiency
 100% Burn-in
 Synchronizable
 1500VDC I/O Isolation
APPLICATIONS
 Very Low Output Ripple
 Mobile/Vehicle Mounted Equipment
 Fixed Switching Frequency
 Telecommunications Equipment
 Active Current Sharing Option
 Network (LANs/WANs) Equipment
 Remote On/Off (Active High/Low)
 Industrial Equipment
 Short Circuit Protection
 Test Equipment
 Over Temperature Protection
DESCRIPTION:
The HP12S24-600 is a 600 watt dc/dc converter with a single 24VDC output and a 10~36VDC
input voltage range. The HP12S24-600 is a model in our new HP series. The HP series is designed to
compliment our LV and FA product lines. It is being introduced to answer the needs of higher power
systems requiring low input voltages at higher power levels up to 600 watts. The HP12S24-600 is
particularly suited for use in mobile/vehicle mounted equipment, telecommunications equipment,
network (LANs/WANs) equipment, and industrial and test equipment. As specialists in modified
standard and customized power solutions, Wall Industries is also capable of rapidly customizing the
HP series to meet specific customer needs.
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1 of 14
Rev A
Technical Specifications
TECHNICAL DATASHEET
HP12S24-600
Model No. HP12S24-600
All specifications are based on 25°C, Nominal Input Voltage and Maximum Output Current unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
Switching Frequency
INPUT (Vin)
Operating Voltage Range
UVLO Turn On at
UVLO Turn Off at
UVLO Hysterisis
Maximum Input Current
No Load Input Current
Input Current under “Disable”
Input Surge Voltage
EFFICIENCY
OUTPUT (Vo)
Voltage Set Point
Voltage Adjustment
Load Regulation
Line Regulation
Temperature Drift
Remote Sense Compensation
Ripple
Spikes
Current
Current Limit
Maximum Admissible Output Capacitance
DYNAMIC RESPONSE
Load step /  V
Recovery Time
Turn On Delay
Turn On Overshoot
Hold Up Time
DISABLE SIGNAL (Logic enable)
Off Condition
On Condition
ISOLATION
Input-Output
Isolation Resistance
Isolation Capacitance
THERMAL
Case (Graph 2)
Over Temperature Protection
Storage Temperature
MTBF
MECHANICAL
Weight
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Related condition
Min
Nom
Max
Unit
10
8
7
-
12/24
8.5
7.5
0.5
0.1
10
92%
36
9
8
66
100
V
V
V
V
A
A
mA
V
23.76
21.6
-
24
0.05
0.05
0.005
-
24.24
26.4
0.2
0.2
0.02
10
V
V
%Vo
%Vo
%/°C
%Vo
0
TBD
32.5
25
-
A
A
μF
50% to 100% load step change
Recovery to within 1% Vo
From Vin (min.) to Vout (nom.)
Full load; resistive
0
0
1
0.4
10
-
-
V
mS
mS
%Vo
mS
Pulled low = off, TTL compatible (ref. to –Vin)
Open = on (internally pulled up), TTL
0
-
3.3
0.8
-
V
V
1500
1
1000
-
-
Vdc
GΩ
pF
100
°C
°C
°C
10Vin @ 600W Output
100mS Wavefront
Sense pins connected to respective outputs
Output limited to 600W and 25A
Sense pins connected to respective outputs
Sense pins connected to respective outputs
Through operating temperature range
Threshold
Full load, resistive
1 minute
-40
-55
Bellcore TR-332 Issue 6 - Calculated
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105
-
125
1,293,794.959 hours
See Figure 1
19.4oz (550g)
Page 2 of 14
TECHNICAL DATASHEET
Rev A
HP12S24-600
Figure 1: Mechanical Dimensions
THREADED INSERTS (STANDARD)
Unit: inches [mm]
6.00 152.4
SERIAL NO.
3.00 76
LABEL
DATE CODE
.112 (NO.4)-40UNC-2B 6X
THREAD DEPTH .312 FROM SURFACE-A
THRU HOLE .125 REMAINDER.
MAX. APPLIED RECEIVING TORQUE: 3.8 LBF-IN [0.4 N-m]
THERMAL INTERFACE SURFACE
SEE NOTES-5 & 6.
A
PIN
.69 17.4
.015 FIM
.20 [5.1] MINIMUM
PIN LENGTH FROM STANDOFF
SEE NOTES- 2, 3 & 4.
PIN DESIGNATIONS
FOR REFERENCE ONLY
4.200 106.68
NON-METALLIC
COUVENTURE
2.100 53.34
.55 14
9
5
9
5
9
5
8
4
2.400 60.96
2.300 58.41
2
6
1
6
6
1
1
.081 [2.06] 3-PLACES
2
+ SENSE
.040 [1.02]
3
TRIM
.040 [1.02]
4
- SENSE
.040 [1.02]
5
- OUTPUT
.081 [2.06] 3-PLACES
6
+ Vin
.081 [2.06] 3-PLACES
7
SD
.040 [1.02]
8
SYNC
.040 [1.02]
9
- Vin
.081 [2.06] 3-PLACES
NOTES:
1. 3D MODEL ML106261 AVAILABLE FOR REFERENCE.
2. PIN TO PIN TOLERANCE: .01 [0.25].
3. PIN DIAMETER TOLERANCE: .005 [0.31].
4. PIN FINISH: LEAD-FREE, RoHS COMPLIANT.
5. CASE MATERIAL: ALUMINUM.
6. CASE FINISH: ANODIZE.
2.050 52.07
1.450 36.83
1.150 29.21
UNLESS OTHERWISE SPECIFIED
DIM ARE IN INCHES, TOLERANCE ON:
.850 21.58
ANGLES ±1°
.500 12.69
125
.XX= ±.01 .XXX= ±.005
.250 6.35
REMOVE ALL BURRS AND
BREAK SHARP EDGES.
0 0
INTERPRET DIMENSION AND TOLERANCE
PER ASME Y14.5M - 1994
.35 8.9
THIRD ANGLE PROJECTION
0 0
.35 8.9
5.300 134.63
.05 1.3
PIN
+ OUTPUT
1.800 45.72
3
7
DESIGNATION
1
THRU-HOLE INSERTS (“TH” SUFFIX)
Unit: inches [mm]
6.00 152.4
SERIAL NO.
3.00 76
LABEL
DATE CODE
.125 [3.18] THRU HOLE 6X
MAX. APPLIED RECEIVING TORQUE: 3.8 LBF-IN [0.4 N-m]
THERMAL INTERFACE SURFACE
SEE NOTES-5 & 6.
PIN
.69 17.4
.015 FIM
1
.13 [3.2] MINIMUM
PIN LENGTH FROM STANDOFF
SEE NOTES- 2, 3 & 4.
PIN DESIGNATIONS
FOR REFERENCE ONLY
4.200 106.68
NON-METALLIC
COUVENTURE
2.100 53.34
.55 14
9
5
9
5
9
5
8
4
2.400 60.96
2.300 58.41
2.050 52.07
2
6
1
6
6
1
1
+ SENSE
.040 [1.02]
3
TRIM
.040 [1.02]
4
- SENSE
.040 [1.02]
5
- OUTPUT
.081 [2.06] 3-PLACES
6
+ Vin
.081 [2.06] 3-PLACES
7
SD
.040 [1.02]
8
SYNC
.040 [1.02]
9
- Vin
.081 [2.06] 3-PLACES
1. 3D MODEL ML106261 AVAILABLE FOR REFERENCE.
2. PIN TO PIN TOLERANCE: .01 [0.25].
3. PIN DIAMETER TOLERANCE: .005 [0.13].
4. PIN FINISH: LEAD-FREE, RoHS COMPLIANT.
5. CASE MATERIAL: ALUMINUM.
6. CASE FINISH: ANODIZE.
.850 21.58
.250 6.35
0 0
5.300 134.63
UNLESS OTHERWISE SPECIFIED
DIM ARE IN INCHES, TOLERANCE ON:
ANGLES ±1°
.500 12.69
125
.XX= ±.01 .XXX= ±.005
REMOVE ALL BURRS AND
BREAK SHARP EDGES.
INTERPRET DIMENSION AND TOLERANCE
PER ASME Y14.5M - 1994
0 0
THIRD ANGLE PROJECTION
.35 8.9
.05 1.3
2
NOTES:
1.450 36.83
1.150 29.21
.35 8.9
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PIN
.081 [2.06] 3-PLACES
1.800 45.72
3
7
DESIGNATION
+ OUTPUT
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Page 3 of 14
TECHNICAL DATASHEET
Rev A
HP12S24-600
TR-332
Issue 6, Dec 1997
Reliability Prediction Procedure
Form/Worksheet Exhibits and Preparation Instructions
Device Reliability Prediction Worksheet
Black Bock Estimates (50% Stress, Temperature = 40°C, No Device Burn-in)
E = 0.9 .
Date 4/22/09
Page 1 of 1
Unit: HP12S24-600
Device Type*
Part Number
Circuit Ref. Symbol
Manufacturer: Wall Industries
Qty. (NI)
Failure Rate**
(G1)
Quality Factor
(Q1)
Total Device
Failure Rate
(N1GI, QI)
(f)
64
2
5
5
74
1
3
1
14
1
18
9
1
3
3
6
0.5
7
19
15
20
4
19
0.2
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
0.9
57.6
5.4
13.5
27
33.3
6.3
51.3
13.5
252
3.6
307.8
1.62
CERAMIC CAP
ZENER
DIODE<1A
DIODE1-20A
RESISTOR<1 MEG
LOAD COIL
POWER FILTER
OPTOCOUPLER
MOSFET
PNP TRANS
IC 1-32 TRANS
PC PINS
772.92
SUBTOTAL
TOTAL = (lSS) = pE S NI lG pQ =
772.92
MTBF = (10^9) / (lSS) = 1293794.96 HRS.
*
Similar parts having the same failure rate, base part number, and quality factor may be combined and entered on one line.
Part descriptions should be sufficient to verify that correct failure rate assignment has been made.
** Failure rates come from Table A. If Method II is applied to devices, instead use failure rate (j) from Form 9 (l*GI ).
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Page 4 of 14
Rev A
TECHNICAL DATASHEET
HP12S24-600
DESIGN CONSIDERATIONS
Under Voltage Lock Out (UVLO)
The converter output is disabled until the input voltage exceeds the UVLO turn-on limit. The converter will
remain ON until the input voltage falls below the UVLO turn-off limit. There is approximately 0.5V hysteresis in
the UVLO circuit.
Over Current Protection
The converter is internally protected from short circuit and over current conditions. During these fault conditions,
the converter output will “hiccup”- (short) or “fold back” - (over current). The converter output will recover once
the short or over current fault is removed.
Over Temperature Protection
The converter is protected from over temperature conditions. Upon exceeding this temperature, the converter will
shut down. The converter will automatically recover once it has sufficiently cooled.
Input Filter
A 4,700μF low ESR capacitor across the input pins is recommended for most system level designs. No additional
input capacitance is needed for the power supply to operate with low impedance inputs. However, most “real
world” system level integration will have some amount of trace or wiring lengths – raising the inductive
impedance. The added input capacitor will bring the impedance back towards unity.
Output Filter
No additional output capacitor is needed for the power supply to operate within stated specifications. However, if
it is a requirement to reduce the ripple and noise on the output, additional capacitance may be added. Usually,
ceramic MLCC’s capacitor works best for reducing H.F. spike noise. Also, capacitance in the form of a tantalum
or aluminum electrolytic capacitor may also be placed across the output in order reduce base ripple, and improve
the load transient peak-to-peak voltage deviation.
Remote Sense
To improve the voltage regulation at the load, route the connections from the -Sense and the +Sense pins to the
–Vout and +Vout connections AT the load. This will force the converter to regulate the voltage at the load and not
at the pins of the converter. If it is not desired to use the Remotes Sense feature, the –Sense and +Sense pins
should be connected to the -Vout and +Vout pins respectively.
Fusing
It is required that the input to the converter be supplied with a maximum 100 A, 250 V rated fuse.
Safety
The HP series is CE pending and pending approval of the following: UL1950, CUL950, TUV60950 FILE 155800.
The isolation provided by the HP Series is a Basic insulation in accordance with EN60950. SELV output
reliability is maintained only if the input to the HP converter is an SELV source.
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Page 5 of 14
Rev A
TECHNICAL DATASHEET
HP12S24-600
Remote ON/OFF
The HP Series has Remote ON/OFF (Enable/Disable) capability using TTL logic levels. This function is offered as either
Active=TTL High (no suffix) or Active=TTL Low (R suffix), see order details on page 14. For Remote ON/OFF limits, see
page 2.
Figure 2. Remote (L/E)
Synchronization
The HP series provides synchronization of switching frequencies between multiple HP series power supplies. The
synchronization function is accomplished without the need for any added external circuitry. By tying the SYNC
pin between HP modules, they will all automatically synchronize. If synchronization is not used, the pin should be
tied to –Vin.
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Page 6 of 14
Rev A
TECHNICAL DATASHEET
HP12S24-600
Output Voltage Trim
The following information is provided to allow quick calculation of the trim resistor value for a desired output
voltage. The general procedure for calculating a trim resistor is as follows:
1. Determine the desired output voltage deviation %.
2. To trim down, solve for resistor value using the “Rtlow” equation.
3. To trim up, solve for resistor value using the “Rthi” equation.
4. Solved resistor values are in K ohms.
Figure 3
 510

 10.2 
Rtlow  

%


Figure 4

 5.1  Vo (100  %) 510
Rthi  

 10.2
1
.
2225


%

%


Notes:
1.
2.
3.
4.
Maximum trim range is ±10%. This includes remote sense drops if applicable.
Output current is limited to specified current when trimming down.
Output power is limited to specified power when trimming up.
Trim resistors should be placed close to the module.
5. If the trim function is not used, it is advised to leave the trim pin floating / not connected.
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Page 7 of 14
TECHNICAL DATASHEET
Rev A
HP12S24-600
Graph 1: HP12S24-600 Efficiency vs. Output Current
100%
99%
98%
97%
96%
Efficiency (%)
95%
94%
93%
92%
91%
90%
89%
Vin=10V
88%
Vin=24V
87%
Vin=36V
86%
85%
5
10
15
20
25
Io (A)
Graph 2: Projected HP12S24-600 Output Power vs Ambient Temperature
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Page 8 of 14
Rev A
TECHNICAL DATASHEET
HP12S24-600
Pdiss(W)
Graph 3: HP12S24-600 Power Dissipation vs. Input Voltage
60
57
54
51
48
45
42
39
36
33
30
27
24
21
18
15
12
9
6
3
0
Io=6.25A
Io=12.5A
Io=18.75A
Io=25A
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
Vin(V)
Graph 4: HP12S24-600 Input Current vs. Input Voltage
70
65
Io=6.25A
60
55
Io=12.5A
50
Io=17.75A
45
Iin (A)
40
Io=25A
35
30
25
20
15
10
5
0
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
Vin(V)
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Page 9 of 14
Rev A
TECHNICAL DATASHEET
HP12S24-600
Photo 1: No load output startup.
Ch.1 = Vin (5V/div)
Photo 2: Full load output startup.
Ch.1 = Vin (5V/div)
Photo 3: Full load (resistive) startup.
Ch.1 = Vin (5V/div)
Photo 4: Output ripple, 24Vin, full load.
100mV / div. 20MHz BW
Photo 5: Transient Response 50% to 100%
Vin=24V, Iout = 12.5A to 25A @ 2V/ Div
Cout=0.1μF Ceramic + 10μF Tantalum
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Page 10 of 14
Rev A
TECHNICAL DATASHEET
HP12S24-600
TEST SETUP:
The HP12S24-600 specifications are tested with the following configurations:
Regulation and Efficiency Setup
To ensure that accurate measurement are taken, the voltage measurements are taken directly at the terminals of the
module. This minimizes errors due to contact and trace lengths between the load and the output of the supply. The
following diagram is of the test setup.
Figure 5: Regulation and Efficiency Probe Setup
Output Ripple Voltage Setup
The module is tested with a 0.1μF ceramic capacitor in parallel with a 10μF tantalum capacitor across the output
terminals. Unless otherwise specified, bandwidth is limited to 20MHZ.
Figure 6: Ripple Voltage Probe Setup
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Page 11 of 14
Rev A
TECHNICAL DATASHEET
HP12S24-600
Input Reflected Ripple Current and Input Ripple Voltage Setup
The module is tested for input reflected ripple current (Irrc). The input ripple voltage is also measured at the pins
with and without an additional 4,700μF electrolytic capacitor. To reduce either the input ripple current or voltage
additional capacitors and/or an inductor may be added to the input of the converter.
Figure 7: Ripple Current Setup
Converter Thermal Consideration
The converter is designed to operate without convective cooling if the de-rating curves are followed. The
converter can operate at higher temperatures and higher output currents if airflow and/or a heatsink are applied.
See Graph 2 for de-rating curves or contact factory for additional thermal information.
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Page 12 of 14
Rev A
TECHNICAL DATASHEET
HP12S24-600
Paralleling Converters
The HP series converters may be paralleled both for redundancy and for higher output current. However, in order
to do this, a high-current, low Vf, Schottky diode must be placed at the +Vo pin of each supply as shown in Figure
8. To improve sharing, tie the two TRIM pins together. The converters may be trimmed by adding a resistor value
from each TRIM pin to ±RS pin, or alternatively, a single resistor of half the value from the common TRIM pins to
the common ±RS pins.
Figure 8: Paralleling Converters
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Page 13 of 14
TECHNICAL DATASHEET
Rev A
HP12S24-600
Ordering Information:
Part Number Example:
HP 12 S 24 – 600 R TH
Series
Designation
Nominal
Input
Voltage Single
Output
Nominal
Output
Voltage
Maximum
Output
Power
Options
Blank
R
Options
Blank
TH
Threaded Hole
Through Hole
Active High Enable
Active Low Enable
Company Information:
Wall Industries, Inc. has created custom and modified units for over 50 years. Our in-house research and development
engineers will provide a solution that exceeds your performance requirements on time and on budget. Our ISO9001-2008
certification is just one example of our commitment to producing a high quality, well documented product for our customers.
Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working
closely with its customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to
provide ongoing support for your project above and beyond the design and production phases. Give us a call today to discuss
your future projects.
Contact Wall Industries for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
(888) 597-WALL
(603)778-2300
 (888)587-9255
 (603)778-9797
sales@wallindustries.com
www.wallindustries.com
5 Watson Brook Rd.
Exeter, NH 03833
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Page 14 of 14