cui.com

CUI Inc

│ SERIES: VHK50W │ DESCRIPTION: DC-DC CONVERTER

date

12/17/2013 │ page 2 of 9

INPUT

parameter

conditions/description

min

typ

max

units

operating input voltage

24 Vdc input models

48 Vdc input models

9

18

24

48

36

75

Vdc

Vdc

under voltage shutdown

24 Vdc input

power up

power down

8.8

8

Vdc

Vdc

48 Vdc input

power up

power down

17

16

Vdc

Vdc

positive logic

models ON (open circuit)

models OFF (0~0.8 Vdc)

negative logic

models ON (0~0.8 Vdc)

models OFF (open circuit)

filter

pi filter

input fuse

15A time delay fuse for 24 Vin models,

8A time delay fuse for 48 Vin models

Note:

1. Open collector refer to -Vin

OUTPUT

parameter

conditions/description

min

typ

max

units

maximum capacitive load

3.3 and 5 V output models

12 V output models

15 V output models

24 V output models

28 V output models

48 V output models

47

10,000

4,160

3,330

2,080

1,780

1,040

μF

μF

μF

μF

μF

μF

measured from high line to low line

±0.2

%

measured from full load to zero load

±0.2

%

±1

%

adjustability

±10

%

switching frequency

300

kHz

transient response

25% step load change

500

μs

temperature coefficient

±0.03

%/°C

Note:

2. A 47 μF aluminum capacitor is required on the output for 48 Vdc output models.

PROTECTIONS

parameter

conditions/description

min

typ

max

units

short circuit protection

continuous

over current protection

% nominal output current

110

160

%

over voltage protection

115

140

%

over temperature protection

shutdown

restart threshold

100

70

°C

°C

SAFETY AND COMPLIANCE

parameter

conditions/description

min

typ

max

units

isolation voltage

for 1 min: input/output; input/case; output/case

1,500

Vdc

isolation resistance

10

MΩ

RoHS

2011/65/EU (CE)

ENVIRONMENTAL

parameter

conditions/description

min

typ

max

units

operating temperature

see derating curve

-40

85

°C

storage temperature

-55

105

°C

For more information, please visit the product page.