Description

The G8211 is a highly-integrated, low startup

current, average current mode, one cycle control

PFC and fixed switching frequency PWM

controller. These functions enable the LED driver

to easily meet the accuracy average LED current

and high power factor requirements. The

integrated functions also include the LED short

protection, open protection, and internal over

temperature protection. The COMP pin controls

the duty by connected an RC compensation

network to ground and forming the closed loop

feedback control. To protect the external power

MOSFET from being damaged by supply over

voltage, the G8211 OUT pin voltage is clamped

to about 12V.

The G8211 improves the performance and

reduces the cost of the LED driver.

Features

• High Power Factor by One Cycle Control

• Accuracy Constant Current

• Low BOM Cost

• Linear Dimming on DIM Pin

• Average Current / Fixed Frequency Control

• Gate Output Voltage Clamp

• LED Open Protection (OVP)

• LED Short Protection (SCP)

• Over Current Protection (OCP)

• Internal OTP Protection

Application

• LED Off-line Lamps

• High Voltage DC-DC LED Driver

• Signage and Decorative LED Lighting

• Back Lighting of Flat Panel Displays

• General Purpose Constant Current Source