A8509 Overview
The A8509 is a multi-output white LED driver for backlighting LCD panels. It integrates a current-mode boost controller and four individual current sinks. The boost controller architecture allows for significant scaling of boost voltage to optimize the solution for the required number of LEDs per string.
A8509 Key Features
- Four integrated high current sinks for LED strings; can be tied together for even higher currents
- Fixed frequency current mode control with integrated gate driver / boost controller; powerful gate driver to drive an ex
- Parallel operation with one boost controller (master) and up to three additional slave controllers; can run up to 16 str
- Active current sharing between LED strings for 0.7% accuracy and 0.8% matching
- Wide input voltage range: 9 to 40 V
- Internal bias supply for single-supply operation (typically
- Separate Enable and PWM pins as interface for Enable
- FSET / SYNC function to either set the boost converter
- Protection Features