page

date

DESCRIPTION: half brick dc-dc converter

2 of 3

11/12/2007

20050

phone

phone 503.612.2300 fax

fax 503.612.2382

PART NUMBER: VHB200W

INPUT

parameter

conditions/description

min

nom

max

units

input voltage

18

48

75

V dc

under voltage lockout

48 Vin power up

17

48 Vin power down

16

input filter

PI Type

OUTPUT

parameter

conditions/description

min

nom

max

units

voltage accuracy

±1.5%

transient response

25% Step Load Change

500

μ/sec.

External Trim Adj. Range

±10%

Ripple & Noise

20MHz BW 3.3V & 5V, 100mV pk-pk, max.

40

mV RMS

20MHz BW 12V & 15V, 150mV pk-pk, max.

60

mV RMS

20MHz BW 24V, 240mV pk-pk, max.

100

mV RMS

Temperature Coefficient

±0.03

%/°C

Short Circuit Protection

Continuous

Line Regulation1

±0.2

%

Load Regulation2

±0.2

%

Over Voltage Protection Trip Range, % Vo nom

115

140

%

Current Limit

Nominal Output

110

150

%

GENERAL SPECIFICATIONS

parameter

conditions/description

min

nom

max

units

efficiency

see table

isolation voltage

input/output

1500

V dc

input/case

1500

V dc

output/case

1500

V dc

isolation resistance

Ω

switching frequency

250

KHz

operating case temperature

-40

100

°C

storage temperature

-55

105

°C

thermal shutdown, case temp

110

°C

dimensions

2.28 x 2.4 x 0.25 inches (57.9 x 61.0 x 13.2mm)

case material

aluminum baseplate with plastic case

notes:

1. measured from high line to low line

2. measured from full load to zero load

3. output ripple and noise measured with 10 μF tantalum and 1 μF ceramic capacitor across output

4. logic compatibility: open collector ref to-input

module ON: >5.5 V dc to 75 V dc or open circuit

module OFF: <1.2 V dc

5. suffix “N” to the model number with negative logic remote ON/OFF

module ON: <1.2 V dc

module OFF: >5.5 V dc to 75 V dc or open circuit

6. trim-up: connect a resistor between the trim pin and +sense

trim-down: connect a resistor between the trim pin and -sense