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60V Buck LED Controller with Fault Flag

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The AL8863 is a step-down DC/DC controller designed to drive LEDs with high output current. The device operates at an input supply voltage from 4.5V to 60V. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The switching frequency range of AL8863 is from 50KHz to 1MHz. The wide operating frequency range allows more flexibility on component selection, and also with operating up to 1MHz, it allows the use of smaller size external components, hence minimizing the PCB size and deriver board.

The output current of AL8863 is set via an external resistor connected between the VIN and CSN input pins. Dimming is achieved by applying a PWM signal at the DIM input pin. The soft-start time can be adjusted using an external capacitor from the DIM pin to ground.


  • Wide Input Voltage Range: 4.5V to 60V
  • Operating Frequency Range: 50KHz to 1MHz
  • 1000:1 PWM Dimming Resolution at 100Hz
  • Single Pin for On/Off and Brightness Control by PWM Signal


  • Commercial & industrial lighting
  • Architecture lighting
  • External LED drivers and smart lighting

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
MinimumInput Voltage (V) 4.5 V
MaximumInput Voltage (V) 60 V
Maximum Output Voltage (V) Ext MOSFET V
Maximum LED Current (A) Ext MOSFET A
LED Current Accuracy (%) 5 %
Switching Frequency Maximum (kHz) 1000 kHz
Dimming (PWM) Yes
Dimming (Analog) No
Efficiency (%) 95 %
OperatingTemperatureRange  (°C) -40 to 125 °C
Sense Voltage (mV) 100 mV
AEC-Q100 Grade No

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Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Farnell, An Avnet Company 1978 9/25/2022 England Buy Now
Mouser Electronics Inc. 190483 9/25/2022 South America, North America, Asia, Europe, Middle East Buy Now
Digi-Key Electronics 59154 9/24/2022 Europe, Asia, North America Buy Now
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