BP3309

PSR Single-Stage APFC Offline LED Controller

BP3309_DS_Rev 1.2

www.bpsemi.com

2

Bright Power Semiconductor Co. Confidential – Customer Use Only

Ordering Information

Part Number

Package

Operating

Temperature

Package Method

Marking

BP3309

SOP8

-40℃ to 105℃

Tape

2,500 Piece/Roll

BP3309

XXXXXY

XYY

Pin Configuration and Marking Information

CS

GND

COMP

LN

OUT

FB

VCC

ST

Figure 2. Pin configuration

Pin Definition

Pin No.

Name

Description

1

CS

Current Sense pin. This pin connects a resistor to GND to sense the

transformer primary side current.

2

GND

Ground.

3

COMP

Loop Compensation Node. This pin connects a capacitor to GND for

stabilization the control loop, achieve accurate LED current, high Power

Factor and low THD.

4

LN

Line Voltage Sense Input pin. This pin connects to the middle of resistor

divider from the rectified line voltage.

5

FB

Feedback Voltage Input pin. This pin detects the output information

through the auxiliary winding. It is also used for line regulation

compensation.

6

VCC

Power Supply pin. Connect a bypass cap from this pin to GND.

7

ST

Startup Voltage Generator pin. Connect a bypass cap from this pin to

GND. This pin is also used to bias external power MOSFET gate through

a resistor.

8

OUT

Internal Power MOSFET Drain. Connect to external high voltage power

MOSFET source.

XXXXXY: lot code

X: Year

YY：Week