Copyright

© ANPEC Electronics Corp.

Rev. A.4 - Sep., 2012

APW7236

www.anpec.com.tw

7

Block Diagram

UVLO

Oscillator

Control Logic

Σ

VIN

EN

FB

GND

LX

OVP

Thermal

Shutdown

EAMP

COMP

Soft-start

Pin Description

PIN

NO.

TDFN2x2-8

TSOT-23-6A

NAME

FUNCTION

1, 5

2

GND

Power and signal ground pin.

2

6

VIN

Main Supply Pin. Must be closel y decoupled to GND with a 4.7

µF or greater ceramic

capacitor.

3

5

OVP

Converter Output and Over-Voltage Protection Input Pin.

4

4

EN

Enab le Control Input. Forcing this pin above 1.0V enables the device, or forcing this

pin below 0.4V to shut it down. In shutdown, all functions are disabled to decrease

the supply current below 1

µA. Do not leave this pin floating.

6

3

FB

Feedback Pin. Connect this pin to cathode of the lowest LED and current-sense

7

-

NC

No Internal Connection.

8

1

LX

Switch pin. Connect this pin t o inductor/diode here.

Exposed Pad

-

GND

Connecting this pad to GND.