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CUI Inc

│ SERIES: VHB50W │ DESCRIPTION: DC-DC CONVERTER

date 04/01/2013

│ page 2 of 4

INPUT

parameter

conditions/description

min

typ

max

units

operating input voltage

24 V input

48 V input

9

18

24

48

36

75

Vdc

Vdc

under voltage lockout

power up

power down

24 V input

48 V input

24 V input

48 V input

8.8

17

8

16

Vdc

Vdc

Vdc

Vdc

filter

PI type

Notes:

1. logic compatibility, open collector ref to -input

Module ON, >3.5 Vdc or open circuit

Module OFF, <1.8 Vdc

OUTPUT

parameter

conditions/description

min

typ

max

units

line regulation

measured from high line to low line

±0.2

%

load regulation

measured from full load to zero load

±0.2

%

voltage accuracy

±1

%

transient response

25% step load change

500

µs

±10

%

switching frequency

100% load, input voltage range

300

kHz

temperature coefficient

±0.03

%/°C

Notes:

2. trim-up: connect a resistor between the trim pin and -Sense

trim-down: connect a resistor between the trim pin and +Sense

PROTECTIONS

parameter

conditions/description

min

typ

max

units

over voltage protection

%Vo

115

140

%

short circuit protection

continuous

current limit

% nominal output current

110

160

%

thermal shutdown case temp.

100

°C

SAFETY AND COMPLIANCE

parameter

conditions/description

min

typ

max

units

isolation voltage

input to output

input to case

output to case

1,500

1,500

1,500

Vdc

Vdc

Vdc

isolation resistance

10

MΩ

isolation capacitance

1,000

pF

safety approvals

UL 60950-1

RoHS compliant

yes

Additional Resources: Product Page | 3D Model | PCB Footprint