AP880X Series Step-Down DC/DC Converter

Operating at switching frequencies up to 600 kHz, Diodes' AP880X series step-down, DC/DC converters require only four smaller and lower cost inductors and/or capacitors. Ensuring uniform LED brightness and eliminating the need for ballast resistors, the drivers suit a broad range of high-brightness, general illumination duties, including signage, architectural and emergency lighting, and MR16 lamp replacement.

AP880X ICs drive up to 13 series-connected LEDs with a constant current from voltage sources between 8 V and 48 V with efficiencies up to 92%. An integrated soft-start function reduces LED stress and extends lifetime. A choice between PWM and DC input dimming control increases design flexibility. All AP880X devices come in the industry standard SOP-8L package. The AP8800 and AP8801 are also available in the MSOP-8L package and the AP8802 in exposed pad DFN and SOP-8L packages.

AP8800

The AP8800 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to seven LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 8 V to 28 V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminates the need for ballast resistors. The AP8800 switches at frequency up to 0.6 MHz.

AP8801

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 8 V to 48 V. 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 500 kHz. This allows the use of small size external components, hence minimizing the PCB area needed.

AP8802

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 8 V to 48 V. 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 500 kHz. This allows the use of small size external components, hence minimizing the PCB area needed.