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AP8800A - COST EFFECTIVE 28V BUCK 1-W LED DRIVER

Description

The AP8800A is a step-down DC/DC converter designed to drive LEDs with a constant current.

The device can drive up to 7 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 8V to 28V.

Features

  • LED driving current up to 370mA.
  • Better than 5% accuracy.
  • High efficiency up to 95%.
  • Operating input voltage from 8V to 28V.
  • Simple, versatile solution requiring only 4 components.
  • PWM/DC input for dimming control.
  • Built-in output open-circuit protection.
  • TSOT25: Available in “Green” Molding Compound (No Br, Sb) with lead Free Finish/ RoHS Compliant.
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2).
  • Halogen.

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Full PDF Text Transcription

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AP8800A COST EFFECTIVE 28V BUCK 1-W LED DRIVER Description The AP8800A is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 7 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 8V to 28V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AP8800A switches at frequency up to 600kHz. This allows the use of small size external components, hence minimizing the PCB area needed. Maximum output current of AP8800A 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.
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