This document introduces LT3743, a high current/high speed LED driver that can revolutionize PWM dimming
The document describes the LT3743, a synchronous buck DC/DC controller that utilizes fixed-frequency, average current mode control. It is specifically designed to regulate high current pulses for lighting applications such as DLP projectors and laser diodes.
A key feature of the LT3743 is its unique switched output capacitor topology, which enables ultrafast load current rise and fall times. This allows the device to rapidly transition between different regulated LED current levels within several microseconds, preserving PWM dimming edges during recovery from low current states.
The LT3743 is a synchronous buck DC/DC controller designed to regulate high current pulses for lighting applications such as DLP projectors.
The device regulates current in any load with an output voltage range from 0V to 2V below the input rail.
The controller achieves regulation with +6% accuracy across its specified output voltage range.