PT6908

V1.3

3

February 2010

ORDER INFORMATION

Valid Part Number

Package Type

Top Code

PT6908-S (L)

16 Pins, SOP, 150mil

PT6908-S

PIN CONFIGURATION

16 PINS, SOP

PIN DESCRIPTION

Pin Name

Description

Pin No.

VIN

Input voltage 9V~36V DC.

1

VDD

Internal regulated voltage.

2

GATE

Drives the gate of external N-channel MOSFET.

3

GND

Ground.

4

CS

Senses the external MOSFET current.

5

SC

Slope compensation for current sense.

6

RT

Oscillator frequency control.

7

SYNC

Synchronization control.

8

CLIM

Input current limit & Soft start.

9

REF

Reference voltage.

10

FAULT

Drives the gate of external N-channel MOSFET. It will be locked at low level when IC

works in error condition.

11

OVP

Over voltage protection.

12

PWMD

Low frequency PWM dimming pin, also enable pin.

13

COMP

Output of OTA, stable closed loop control.

14

IREF

Sets the LED string current level.

15

FB

LED string current feedback & output short circuit protection.

16