VPTPCM-12 Series
VPTPCM-12-3.0 http://www.vpt-inc.com
Sales Information:
Phone: (425) 353-3010
Fax: (425) 353-4030
E-mail: vptsales@vpt-inc.com 1
HIGH RELIABILITY COTS
PRECONDITIONING MODULE
DESCRIPTION
The VPTPCM-12 is a Pre-Conditioning Module
which allows VPT’s DV and VPT series isolated DC-
DC converters to operate over an extended input
voltage range and provides compliance to both MIL-
STD-704 and MIL-STD-1275 input power
requirements. A wide input voltage range
accommodates both nominal 12V and 28V inputs
including avionics, mobile, ground systems, and
other applications. A high efficiency design reduces
input power requirements and eases thermal
management. Low input and output ripple, fixed
operating frequency, and companion EMI filters
simplify system design and compliance. A proven
design heritage, no optoisolators and a rugged all
metal package ensure long term reliability.
The VPTPCM-12 intended for harsh environments
including severe vibration, shock and temperature
cycling. Testing is to JESD22, MIL-STD-810, and
MIL-STD-883.
These converters are designed and manufactured in
the USA in a facility certified to ISO9001, J-STD-001
and IPC-A-610.
This product may incorporate one or more of the
following U.S. patents:
5,784,266
5,790,389
5,963,438
5,999,433
6,005,780
6,084,792
6,118,673
FEATURES
High Reliability at Low Cost
Up to 120 Watts of Output Power
Wide Input Voltage Range: 9 to 40 Volts per
MIL-STD-704 and MIL-STD-1275
Transient Operation down to 6 Volts and up to
100 Volts per MIL-STD-1275
High Efficiency, Up to 99%
Inrush Current Limiting
Input Undervoltage Lockout
Fixed Frequency
Output Soft Start
Wide Temperature Range, -55°C to 100°C
Internally Conformal Coated
Six Sided Non-Hermetic Rugged Metal
Enclosure
Figure 1 – VPTPCM-12 Pre-Conditioning Module
(Not To Scale)
VPTPCM-12 Series
VPTPCM-12-3.0 2
SPECIFICATIONS (TCASE = -55°C to +100°C, VIN = +28V ± 5%, Full Load, Unless Otherwise Specified)
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous) 40 VDC Junction Temperature Rise to Case +15°C
Input Voltage (Transient, 50 ms) 100 Volts Storage Temperature -55°C to +125°C
Output Power 120 Watts Lead Solder Temperature (10 seconds) 300°C
Power Dissipation (Full Load, TCASE = +100°C) 17 Watts Weight (Maximum) 79 Grams
Parameter Conditions
VPTPCM-12 Units
Min Typ Max
STATIC
INPUT
Voltage
Continuous 9 - 40 V
Transient3 10 sec 8 - - V
Transient1,3 1 sec, Pout = 100W maximum 6 - - V
Transient 1 sec - - 50 V
Transient 50 ms, 500 mΩ - - 100 V
Transient 70 μs, 15 mJ -250 - 250 V
Transient 10 μs, 50Ω - - 600 V
Current
Inhibited - - 25 mA
Vin = 12V, No Load - - 300 mA
Vin = 28V, No Load - - 35 mA
Inrush Current3 Vin = 0 to 28V, Full Load - 3 5 A
Ripple Current Vin = 12V, Full Load, 20Hz to 10MHz - - 250 mAp-p
Inhibit Pin Input3 0 - 1.5 V
Inhibit Pin Open Circuit Voltage 14 16 18 V
UVLO Turn On 6.5 - 7.9 V
UVLO Turn Off3 4.5 - 5.9 V
OUTPUT
Voltage
Continuous 17 - 40 V
Transient - - 50 V
Power2 0 - 120 W
Ripple Voltage Vin = 12V, 20Hz to 10MHz - - 500 mVp-p
EFFICIENCY Vin = 28V 97 99 - %
Vin = 12V 88 92 - %
CAPACITIVE LOAD3 - - 500
F
SWITCHING FREQUENCY 400 500 550 kHz
CASE ISOLATION 500 VDC 100 - - MΩ
MTBF (MIL-HDBK-217F) GM @ TC = 55°C - 400 - kHrs
DYNAMIC
Turn On Delay VIN = 0V to 28V - 2 6 mSec
VIN = 0V to 12V - 10 25 mSec
Notes: 1. Operation down to 6V is possible after the input voltage is taken above 8V to start the module.
2. Derate linearly to 0 at 110°C.
3. Verified by qualification testing.
VPTPCM-12 Series
VPTPCM-12-3.0 3
BLOCK DIAGRAM
28V IN
PIN 1
IN COM
PIN 5
28V OUT
PIN 10
OUT COM
PIN 6
CLAMP
CONTROL
INHIBIT
PIN 3
CASE
Q1 Q3
Q2
D1
BOOST
CONTROL
VCC
SUPPLY
UNDER
VOLTAGE
PROTECTION
HIGH
DRIVE
HIGH
DRIVE
PIN 2
PIN 4
INH OUT
PIN 8
Figure 2
CONNECTION DIAGRAM
Figure 3
VPTPCM-12 Series
VPTPCM-12-3.0 4
PERFORMANCE CURVES
0
5
10
15
20
25
30
35
40
45
50
0 102030405060708090100
Vin (V)
Vout (V)
0
20
40
60
80
100
120
140
0 102030405060708090100
Vin (V)
Pout (W)
Figure 4 – Output Voltage vs Input Voltage Figure 5 – Output Power Rating vs Input Voltage
0
20
40
60
80
100
120
140
0 2 4 6 8 101214161820
Vin (V)
Pout (W)
Continuous
Transien
t
80
84
88
92
96
100
010203040
Vin (V)
Efficiency (%)
Figure 6 – Output Power Rating vs Input Voltage Figure 7 – Full Load Efficiency vs Input Voltage
VPTPCM-12 Series
VPTPCM-12-3.0 5
PERFORMANCE CURVES
Figure 8 – Vin, Vout during 6V, 1 sec Transient Figure 9 – Vin, Vout during 100V, 50ms Transient
Figure 10 – Inhibit Out during 100V Transient
Vin
Vout
Vout
Vin
VPTPCM-12 Series
VPTPCM-12-3.0 6
PERFORMANCE CURVES
Figure 11 – Vout, Iin (inrush current) during
turn-on at 28V
Figure 12 – Vout, Iin (inrush current) during
turn-on at 12V
EMI PERFORMANCE CURVES
(TCASE = 25°C, VIN = +12V ± 5%, Full Load, Unless Otherwise Specified)
Figure 13 – VPTPCM with VPTF20-28 Figure 14 – VPTPCM with VPTF20-28
Iin
Vout
Vout
Vin
Vin
Iin
VPTPCM-12 Series
VPTPCM-12-3.0 7
PACKAGE SPECIFICATIONS
Top View Side View
Bottom View
Figure 15 – Package and Pinout
Dimensional Limits are ±0.005” (Unless Otherwise Stated)
Package Notes:
1. Case temperature is measured on the center of the baseplate surface.
2. Materials: Baseplate – aluminum, conductive conversion coating.
Cover – nickel plated.
Pins – copper, gold over nickel plating.
3. Mounting holes are not threaded. Recommended fastener is 4-40.
4. This Package is not hermetic. VPT offers a wide range of hermetic products. Please contact VPT for details if
hermetic products are required.
5. For applications requiring exposure to liquid cleaning, please contact VPT.
PIN FUNCTION
1 V IN
2 V IN
3 INHIBIT
4 IN COM
5 IN COM
6 OUT COM
7 CASE
8 INH OUT
9 N/C
10 V OUT
VPTPCM-12 Series
VPTPCM-12-3.0 8
PACKAGE PIN DESCRIPTION
Pin Function Description
1 VIN Positive Input Voltage Connection
2 VIN Positive Input Voltage Connection
3 INHIBIT
This is an open collector input. Logic Low = Disabled Output. Connect the inhibit
pin to input common to disable the output. Unconnected, open collector or open
drain = Enabled Output.
4 INCOM Return Connection
5 INCOM Return Connection
6 OUTCOM Return Connection
7 CASE Case Connection
8 INH OUT
This is an open collector output. It will activate low during a positive input voltage
transient. It can be used as a status flag or connected to the Inhibit input of the
downstream DC-DC converter to turn the converter off during a transient, when
uninterrupted operation is not required. This connection is usually not required.
This pin should be left open if not used.
9 N/C No Connection
10 VOUT Positive Output Voltage Connection
100% ENVIRONMENTAL SCREENING
Screening Condition
Internal Visual IPC-A-610
Stabilization Bake MIL-STD-883, Method 1008, Condition B, 125°C, 24 hours
Temperature Cycling MIL-STD-883, Method 1010, Condition B, -55°C to +125°C, 10 Cycles
Burn-In 96 hours at +100°C
Final Electrical 100% at 25°C
External Visual Internal Procedure
VPTPCM-12 Series
VPTPCM-12-3.0 9
ORDERING INFORMATION
VPTPCM- 12
1 2
(1) (2)
Product Series Nominal Input Voltage
VPTPCM 12
12 - 28 Volts
CONTACT INFORMATION
To request a quotation or place orders please contact your sales representative or the VPT Inc. Sales
Department at:
Phone: (425) 353-3010
Fax: (425) 353-4030
E-mail: vptsales@vpt-inc.com
All information contained in this datasheet is believed to be accurate, however, no responsibility is assumed for possible errors
or omissions. The products or specifications contained herein are subject to change without notice.
