YEV09T03 3A DC-DC POL Converter

Data Sheet

ZD-01968 Rev 1.1, 25-Mar-09

www.power-one.com

Page 9 of 10

provided to protect the converter from catastrophic

failure. Refer to the “Input Fuse Selection for DC/DC

for proper selection of the input fuse. Both input

traces and the chassis ground trace (if applicable)

must be capable of conducting a current of 1.5 times

the value of the fuse without opening.

To comply with safety agencies’ requirements, a

recognized fuse must be used in series with the input

line. The fuse must not be placed in the grounded

input line. Abnormal and component failure tests

were conducted with the POL input protected by a

fast-acting 25A fuse. If a fuse rated greater than 25A

is used, additional testing may be required.

The maximum DC voltage between any two pins is

Vin under all operating conditions. In order for the

output of the YEV09T03 POL converter to be

considered as SELV (Safety Extra Low Voltage),

according to all IEC60950 based standards, the input

to the POL needs to be supplied by an isolated

secondary source providing a SELV also.

9.

Pin Assignments and Description

Pin

Name

Pin

Number

Pin

Type

Buffer

Type

Pin Description

Notes

ON/OFF

1

I

PU

Enable

Pull high to turn ON the POL

VIN

2

P

Input Voltage

GND

3

P

Power Ground

VOUT

4

P

Output Voltage

TRIM

5

I

A

Output Voltage Trim

Connect a high accuracy resistor between TRIM

and GMD pins to set the output voltage

Legend: I=input, O=output, I/O=input/output, P=power, A=analog, PU=internal pull-up