Drive 100W high power master-slave architecture new LED backlight driver IC

Guangpeng Technology (ADDtek Corp.) launched the LED Monitor/TV backlight driver IC new series of products, highly integrated, low cost and suitable for high power A732 support master-slave architecture A728.

A732 is built by the 60V high voltage switch boost driver and built 50V MOSFET 8 channel constant current source, can drive up to 10.8W LED, suitable for use in 17, 19 LED Monitor backlight. A728 is a 12 channel by the boost converter control circuit for driving the external power switch and a built-in 66V MOSFET constant current source which can drive up to 36W LED, suitable for use in LED Monitor backlight 19 "to 24"; if through master-slave architecture can be extended more than 100W can drive LED, LED TV backlight is enough to push the 30 "to 42".

A732/A728, you can control the external power switch, preventing surge current boot provides output short circuit protection, can achieve real shutdown isolation, avoid LED due to leakage current caused by the leakage of light trace. A732/A728 can support DC voltage and pulse width modulation (PWM) two dimming mode, which can reach the PWM 1000:1 dimming range. The built in constant current source has the time difference switch mechanism, which can stagger the turn-on and turn off time of each channel current, and reduce the interference caused by dimming. A patented voltage feedback mechanism is provided to drive the IC to work at optimum efficiency mode at any time, without being affected by the variation of the LED forward voltage (VF) with the temperature.