page

date

DESCRIPTION: half brick dc-dc converter

2 of 4

03/2008

20050

phone

phone 503.612.2300 fax

fax 503.612.2382

PART NUMBER: VHB50W Series

NOTES:

1. Measured from High Line to Low Line

2. Measured from Full Load to Zero Load

3. Logic Compatibility: Open Collector ref to -Input

Module ON: Open Circuit

Module OFF: < 0.8VDC

4. Suffix “N” to the model number with negative logic remote ON/OFF.

Input

Input Voltage Range

24V

9-36V

48V

18-75V

Under Voltage Lockout

12Vin power up

8.8V

12Vin power down

8V

48Vin power up

17V

48Vin power down

16V

Input Filter

PI Type

Output

Voltage Accuracy

±1% max.

Transient Response: 25% Step Load Change

<500μ sec.

External Trim Adj. Range

±10%

Ripple & Noise

20MHz BW, 3.3V, 5V

40mV RMS., max

100mV pk-pk, max

12V& 15V

60mV RMS., max

150mV pk-pk, max

24V

100mV RMS., max

240mV pk-pk, max.

Temperature Coefficient

±0.03%/°C

Short Circuit Protection

Continuous

Safety

approved to UL60950-1 (E222736)

±0.2% max

±0.2% max

Over Voltage Protection trip Range, % Vo nom.

115-140%

Current Limit

110-160% Nominal Output

General Specifications

Efficiency

see table

Isolation Voltage

Input/Output

1500VDC min.

Input/Case

1500VDC min.

Output/Case

1500VDC min.

Isolation Resistance

Switching Frequency

300KHz, Typ.

Operating Case Temperature

-40°C to 100°C

Storage Temperature

-55°C to 105°C

Thermal Shutdown, Case Temp.

100°C Typ.

Dimensions

2.28x2.40x0.50 inches

57.9x61.0x12.7mm

Case Material

aluminum