Copyright

© ANPEC Electronics Corp.

Rev. A.9 - Oct., 2013

APL3540

www.anpec.com.tw

8

Operating Waveforms (Cont.)

The test condition is V

Pin Description

PIN

NO.

NAME

FUNCTION

1

VIN

least a 0.1

µF capacitor.

2

OCSET

MOSFET to set the OCP trip point.

3

DRV

Gate Driver Output. The gate driver for the external N-channel MOSFET.

4

VOUT

Output Voltage Sense Pin. Connect this pin to the source of external N-channel MOSFET to monitor the

output voltage.

5

EN

pulled high by an internal current source.

6

GND

Ground.

7

POK

Power-Okay Indicator Output. The POK is an open-drain pull-down device. When VOUT voltage is below the

POK threshold, the POK output is pulled low; when VOUT voltage is above the POK threshold, the POK

output is high impedance.

8

VINSEL

Input Voltage Sense Pin. Connect a resistive divider from VIN to VINSEL to GND to monitor the input voltage.

This pin cannot be left floating.

V

IN

V

DRV

V

OUT

V

POK

1

2,3

V

V

IN

CH1: V

TIME: 20ms/Div

V

CH2: V

CH3: V

Wrong VIN Input Voltage Protection,

V