High Power LED Driver
The PT6901 is an open loop current mode control high brightness LED driver IC operating in constant frequency 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.
The functions of linear and PWM dimming are included. The PT6901 provides a low-frequency PWM dimming input that can accept an external control signal with a duty cycle of 0~100% and a frequency between 100Hz and a few KHz. Output current to LED string can be programmed to any value between 0 to its maximum value at the PWM dimming control input of the PT6901. Also, a 0~240mV linear dimming input can be used for linear dimming of the LED current.
- Constant-current driver
- >85% Efficiency
- Constant frequency
- 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
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