Description

This reference design drives two series connected white LEDs at 700mA. The steady-state input range is 8VDC to 16VDC: but the circuit is designed to survive a 52VDC input transient condition. The TPS40211 boost controller is used in an upside-down" buck topology for a simple: low-cost solution. This circuit includes enable: PWM dimming: current trimming: and a current sense functions for interfacing with an external microprocessor."