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AP8802

Diodes Inc.


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Product Description:
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.


Product Specifications:
Features
• 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
• SOP-8L, SOP-8L-EP (Preview) and DFN3030-10 are available in
“Green” Molding Compound (No Br, Sb)
• Lead Free Finish/RoHS Compliant

Product Overview Specs
Part Number AP8802
Min.- Max. Input Voltage (V) 8 ~ 48
Output Voltage (V) 48
Typ Peak Output Current (A) 1
Max Output Current (mA) -
LED Current Accuracy (%) 7
Frequency (kHz) typ 500
Efficiency (%) 92
Operating Temperature (C) -40 to +105
Quiescent Current (mA) typ -
Standby Quiescent Current (uA) typ 120



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