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YEV09T20 20A DC-DC POL Converter
4.5V to 13.8V Input ? 0.59V to 5.1V Output
Data Sheet
The YEV09T20-0 POL converters have no internal
fuse. If required, the external fuse needs to be
provided to protect the converter from catastrophic
failure. Refer to the “Input Fuse Selection for DC/DC
converters” application note on www.power-one.com
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 YEV09T20-0 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
Pin
Pin
Buffer
Pin Description
Notes
Name
VOUT
Number
1
Type
P
Type
Output Voltage
TRIM
GND
PGOOD
ON/OFF
VIN
SENSE+
SENSE-
2
3
4
5
6
7
8
I
P
I/O
I
P
I
I
A
PU
PU
A
A
Output Voltage Trim
Power Ground
Power Good
Enable
Input Voltage
Positive Voltage Sense
Negative Voltage Sense
Connect a high accuracy resistor between TRIM
and GND pins to set the output voltage
Open drain pin indicating status of the output
voltage
Pull high to turn ON the POL
Connect to the positive point close to the load
Connect to the negative point close to the load
Legend: I=input, O=output, I/O=input/output, P=power, A=analog, PU=internal pull-up
ZD-02093 Rev. 1.2, 18-Jun-10
www.power-one.com
Page 11 of 12
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