DESCRIPTION

PT6901 is an open loop current mode control high brightness LED driver IC. PT6901 can be programmed to operate in either constant frequency or constant off-time mode. The frequency can be programmable set as 30KHz~300KHz. The PT6901 is ideally suited for buck LED drivers. It exports PWM signal to control the external MOS. The PT6901 supply voltage input range is from 8V to 12V, and the output current can be programmed between a few milliamps and up to more

than 1.0A. PT6901 can drive a single or multiple series LEDs, and provide reliability constant current output by detecting LED peak current.

FEATURES

•Constant-current driver

•>85% Efficiency

• Constant frequency or constant off-time operation

• 8V to 12V input range

• LED string from one to hundreds diodes

• Applications from a few mA to more than 1A LED driver

• PWM low-frequency dimming and linear dimming