【產品特性】LED driving current up to 500mA
Vin max. 48V
12VAC, 24VAC and 28V
High efficiency up to 92%
High switching frequency up to 500kHz.
PWM/DC input for dimming control
Built-in soft-start function
Built-in output open-circuit protection
“Green” Molding Compound (No Br, Sb) & Lead Free Finish/RoHS Compliant
500mA LED Step-down Converter
【產品應用】1W LED applications
Commercial & industrial lighting
Appliance interior lighting
HB LED 12/24V solar lighting
LED Street lighting
【文字介紹】The AP8801 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 AP8801 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 AP8801 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.