Vicor ComPAC Family 50 to 600 Watt DC-DC Switchers User Manual

ComPAC Family

50 to 600 Watt
DC-DC Switchers

Functional and Mechanical Layout

Installation and Operation Guidelines

Application Notes

Product Description

The ComPAC family of user-definable power supplies provides a complete

power solution optimized to meet the voltage, noise, and transient

protection input requirements of commercial, industrial, military, and

telecommunications applications. These switchers are available with one,

two, or three outputs and total output ratings up to 600 Watts. Each unit

incorporates one, two, or three component-level Vicor DC-DC converters in

a chassis-mount housing. ComPAC’s unique modular design accommodates

thousands of different configurations.

2

20 mA Max.

Disable

DIS+

DIS–

+

V

0.1 1 10ms 100 1000

100V

Normal Operating Area

I.S.W.

Full Load

100V

Standard Wide Range

24V Inputs

0.1 1 10ms 100 1000

800V

Normal Operating Area

I.S.W.

Full Load

300V Input

S.D.

160V

0.1 1 10ms 100 1000

Normal Operating Area

I.S.W.

Full Load

48V Input

R.E.

276V

Normal Operating Area

I.S.W.

Full Load

0.1 1 10ms 100 1000

48V Wide Range Input

R.E.

S.D.

R.E.

R.E.

32V

21V

36V

18V

S.D.

76V

125V

60V

100V

42V

500V

400V

200V

36V

S.D.

S.D.

100V

500ms

500ms

Application Notes

Input Connections

Master Disable

DC Input

Earth Ground

Disable +

Disable –

VIN +

VIN –

GND

See fuse chart on page 6

Master Disable Drive Circuit

The Master Disable input is optically isolated and incorporates a reverse polarity
protection diode. Apply a current of up to 20 mA to disable output(s). See ComPAC
data sheet for minimum levels.

Input Operating Voltage

Long Term Safe Operating Curves. I.S.W. = Input Surge Withstand (no

disruption of performance, 1% duty cycle max.).

R.E. = Ratings Exceeded. S.D. = Shutdown. For short duration transient

capability, refer to product specifications.

Thermal Impedance

Note: Not applicable for conduction cooled (–CC) models.

Below are the chassis-to-air thermal impedance values, as a function of airflow,

for ComPAC package configurations that incorporate one, two, and three internal

component DC-DC converters.

Thermal Impedance—Case-to-Air (°C/Watt)

Standard Units With Optional H1 Heatsink

1-Up 2-Up 3-Up 1-Up 2-Up 3-Up

Free Air (Horiz.) 3.6 1.7 1.4 2.1 1.3 1.0

Forced Convection Through Heat sink Fins

50 LFM 2.7 1.4 1.3 1.5 1.1 0.9

100 LFM 2.3 1.3 1.1 1.2 0.9 0.7

250 LFM 1.6 1.0 0.8 0.7 0.5 0.4

500 LFM 1.2 0.7 0.6 0.4 0.3 0.3

750 LFM 0.9 0.5 0.5 0.3 0.2 0.2

1000 LFM 0.8 0.5 0.4 0.2 0.2 0.2

To calculate case temperature: total power dissipated times

thermal impedance plus ambient temperature.

To calculate Watts dissipated per output: output power

divided by efficiency minus output power.

3

Output Trimming

Trim resistors not required for operation at rated output voltage.

+ OUT

+ SENSE

TRIM

— SENSE

— OUT

R2

+Sense and –Sense must be connected locally or remotely (shown).

Resistor Values for Trimming Standard Output Voltages

Nominal Output Voltage 5 V 12 V 15 V 24 V 28 V 48 V Trim Range

R1(KΩ) .953 15.8 22.1 41.2 48.7 90.9

R2(KΩ) 909090909090

Refer to Applications Manual, Chapter 5, for other trimming methods.

+ V

R1

To Load

10K

— V

+10%, -10%

OUT

OUT