UM601/A

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

2 of 5

www.unisonic.com.tw

QW-R121-001.C



PIN CONFIGURATION

GND

4

3

2

1

8

7

6OUTPUT

5

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PIN DESCRIPTION

PIN

NAME

TYPE

FUNCTION

1.

OUTPUT

Voltage Reference Output 1.24V, 10mA max. Do not short circuit

2.

INPUT

Current source enable input. This current source can be used to offset the

voltage measurement on the sense resistor and therefore to modify the charge

current. The current source is enabled when the input volage on pin 2 is lower

than 0.8V

3.

INPUT

Current Limitation Reference Input

4.

GND

INPUT

Ground

5.

INPUT

Current Limitation Loop Input, connected to the sense resistor

6.

OUTPUT

OUTPUT

Output pin common to the voltage regulation and current limitation loops. This

output can drive the primary side (LED) of an optocoupler

7.

INPUT

Voltage Regulation Loop Input

8.

INPUT

Power Supply Input (4.5 ~ 32VDC)