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The AP8802 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to thirteen LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 8V to 48V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AP8802 switches at frequency up to 500kHz. This allows the use of small size external components, hence minimizing the PCB area needed. Maximum output current of AP8802 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.2V or lower at CTRL shuts down the output at SW and puts the device into a low-current standby state.
Commercial & industrial lighting
Small LCD panel backlight
Appliances interior lighting
Architecture Detail lighting
LED driving current up to 1A
High efficiency up to 92%
Operating input voltage up to 48V
High switching frequency up to 500kHz
PWM/DC input for dimming control
Built-in output open-circuit protection
SO-8, SO-8EP and DFN3030-10 are available in “Green” Molding Compound (No Br, Sb)