Diodes Menu Close
Back to Medium and Low Voltage DC-DC LED Drivers



Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The AL8862Q is a step-down DC/DC converter designed to drive LEDs with a constant current. The AL8862Q operates with an input supply voltage from 5V to 55V and provides an externally adjustable output current up to 1A. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The AL8862Q switches at frequency up to 1MHz. This allows the use of smaller size external components, hence minimizing the PCB size.

The AL8862Q integrates the power switch and a high-side output current sensing circuit. Maximum output current of AL8862Q 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. The soft-start time can be adjusted using an external capacitor from the CTRL pin to ground. An input voltage of 0.3V or lower at CTRL pin will shut down the power switch.

The AL8862Q has been qualified to AEC-Q100 Grade 1 and is Automotive Grade supporting PPAPs.


  • AEC-Q100 Grade 1 Qualified
  • Wide Input Voltage Range: 5V to 55V
  • Output Current up to 1A
  • Internal 55V NDMOS Switch
  • Typical 4% Output Current Accuracy
  • Single Pin for On/Off and Brightness Control by DC Voltage or PWM Signal
  • High Efficiency (Up to 97%)
  • Fault Status Indication for Abnormal Operation
  • LED Short-Circuit Protection
  • Inherent Open-Circuit LED Protection
  • Current-Sense Resistor Short-Circuit Protection
  • Over-Temperature Shutdown
  • Up to 1MHz Switching Frequency
  • SO-8EP Packages Available in Green Molding Compound (No Br, Sb)
  • Totally Lead-Free & Fully RoHS Compliant
  • Halogen and Antimony Free. Green Device


  • Automotive Interior LED Lamps
  • Automotive Exterior LED Lamps

Product Specifications

Product Parameters

AEC Qualified Yes
Compliance (Only Automotive supports PPAP) Automotive
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
MinimumInput Voltage (V) 5 V
MaximumInput Voltage (V) 55 V
Maximum Output Voltage (V) 50 V
Maximum LED Current (A) 1 A
LED Current Accuracy (%) 4 %
Switching Frequency Maximum (kHz) 1000 kHz
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency (%) 98 %
OperatingTemperatureRange  (°C) -40 to 125 °C
Sense Voltage (mV) 100 mV
AEC-Q100 Grade 1

Related Content



Technical Documents


SPICE/IBIS Model Documents


Evaluation Board User Guides

Recommended Soldering Techniques


Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Arrow Electronics 15000 10/3/2022 United States Buy Now
Farnell, An Avnet Company 4240 10/3/2022 England Buy Now
Mouser Electronics Inc. 90000 10/3/2022 South America, North America, Asia, Europe, Middle East Buy Now
Digi-Key Electronics 3925 10/2/2022 Europe, Asia, North America Buy Now
Request Sample