SE8323 is a high efficiency buck converter optimized to drive high current LEDs. SE8323 controls an external MOSFET at switching frequency by a single RT resistor. A single RCS resistor sets the full scale LED string current up to 6A from supplies as high as 80 V.
In SE8323, enable, linear dimming and PWM dimming control is provide. The linear dimming can be implemented by applying a control voltage from 0.4 to 2.5V to the LD pin. The PWM dimming has very fast response time. The dimming frequency is up to 30KHz, a high contrast ratio can be achieved.
The patent-pending linear dimming ultra-low offset voltage operational amplifier is a next generation OP designed to cover 0% dimming depth.
Additional features include thermal shutdown, cycle-by-cycle current limit and over-current protection, soft start, smart thermal gradual protection, Internal Spread Spectrum Frequency Modulation for Low EMI.
The SE8323 is available in the SOP8 package.