ADVANCE DATASHEET

Datasheet

December, 2013 Rev. 1.1

2/11

©

2013 Shaoxing Devechip Microelectronics Co., Ltd.

www.sdc-semi.com

Current Mode PWM Controller

SDC4569A

Pin Configuration

GND

FB

VIN

RI

GATE

VDD

SENSE

NC

1

2

3

4

5

6

7

8

Package: SOP-8

Figure 2. Pin Configuration

Pin No.

Pin Name

Function

1

GND

Ground

2

FB

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

SENSE pin input

3

VIN

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

4

RI

Internal Oscillator frequency setting pin. A resistor connected between RI and GND set

the PWM frequency

5

NC

-

6

SENSE

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

7

VDD

Chip DC power supply pin

8

GATE

Totem-pole gate drive output for the power MOSFET

Table 1. Pin Description

SDC

CONFIDENTIAL

DOCUMENT