LN3C69

Copyright(C) 2010

Lii Semiconductor

-2-

www.liisemi.com

澎湃驅動力 源於力生美

1

BLOCK DIAGRAM

Pin Configuration

PIN ASSIGNMENTS

Pin No.

Name

Function

Description

1

GND

P

Ground

2

FB

I

Feedback input pin. The PWM duty cycle is determined by voltage level into

this pin and SENSE pin input.

3

VIN

I

Connected through a large value resistor to rectified line input for Startup IC

supply and line voltage sensing.

4

RI

I

Internal Oscillator frequency setting pin. A resistor connected between RI

and GND sets the PWM frequency.

5

RT

I

Temperature sensing input pin. Connected through a NTC resistor to GND.

6

SENSE

I

Current sense input pin. Connected to current sensing resistor node.

7

VDD

P

Chip DC power supply pin

8

GATE

O

Totem-pole drive output for the power MOSFET.

Fig3.

腳義

引定

Fig2.

内部框图