Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715

V24A28C400A DC-DC Converter

Rev. 5.2

Page 2 of 8

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Parameter

Min

Typ

Max

Unit

Notes

Operating input voltage

18

24

36

Vdc

Input surge withstand

50

Vdc

<100ms

Output voltage setpoint

27.72

28.00

28.28

Vdc

Nominal input; full load; 25°C

Output OVP setpoint

31.5

32.7

33.9

Vdc

25°C; recycle input voltage to restart ( 1 minute off )

Output power

400

Watts

At 100°C baseplate temperature

Efficiency

87.5

88.5

%

Nominal input; 75% of full load; 25°C

Parameter

Min

Typ

Max

Unit

Notes

Line regulation

±0.02

±0.20

%

Low line to high line; full load

Load regulation

±0.06

±0.20

%

No load to full load; nominal input

Temperature regulation

±0.002

±0.005

% / °C

Over operating temperature range

Ripple and noise, p-p

70

88

mV

Nominal input, full load; 25°C; 20MHz bandwidth

Current limit

14.5

16.4

19.4

Amps

Output voltage 95% of nominal

Short circuit current

10.0

16.4

19.4

Amps

Output voltage <250mV

Power sharing accuracy

±2

±5

%

10 to 100% of full load

Programming range

10

110

%

Of nominal output voltage. For trimming below

90% of nominal, a minimum load of 10% of

maximum rated power may be required.

Parameter

Min

Typ

Max

Unit

Notes

Undervoltage turn-on

17.5

17.9

Vdc

Undervoltage turn-off

14.77

15.30

Vdc

Overvoltage turn-off/on

36.3

37.8

39.6

Vdc

Dissipation, standby

6.3

9.5

Watts

No load

MODULE OPERATING SPECIFICATIONS

MODULE INPUT SPECIFICATIONS

MODULE OUTPUT SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

Electrical characteristics apply over the full operating range of input voltage, output load (resistive) and baseplate temperature,

unless otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate.

Baseplate

Slotted (Style 1)

Slotted baseplate (style 1) requires no designator.

For threaded baseplate add a "2" to the end of the

part number. For thru-hole add a "3".

Pin style

Short (Style 1)

For long pin configuration add “L” to the end of the

part number. See page 7 for pin dimensions.

MODULE MECHANICAL SPECIFICATIONS

Note: For important information relative to applications where the converter modules are subject to continuous dynamic loading,

contact Vicor applications engineering at 800-927-9474.