资 源 简 介
The ZD832 is a high voltage, TransformerFree™ AC-DCconstant current driver for driving a string of white or RGBLEDs in series. It operates from an universal input voltageof 85VAC to 170VAC, or 170VAC to 240VAC and generatesa programmable constant output current. The high operaTIngvoltage of ZD832, along with its linear control architectureeliminates the need for an external inductor, transformer andrecTIfying diode bridge. The output current level is set by asingle resistor and can be set as high as 30mA. Dimmingcontrol can be accomplished by using pulse-width modulaTIonsignal with varying duty cycle on the PWM pin or by applyingan analog DC voltage on the ISET pin. Thermal and overvoltagecircuitry protects the internal power transistors fromexcessive power dissipaTIon.
