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Description

The AL8862 is a step-down DC/DC converter designed to drive LEDs with a constant current. The AL8862 operates with an input supply voltage from 5V to 60V 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 AL8862 switches at frequency up to 1MHz. This allows the use of smaller size external components, hence minimizing the PCB size.

The AL8862 integrates the power switch and a high-side output current sensing circuit. Maximum output current of AL8862 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.

Application(s)

  • Commercial & Industrial Lighting
  • Appliances Interior Lighting
  • Architecture Detail Lighting
  • External Driver with Multiple Channels and Smart Lighting

Feature(s)

  • Wide Input Voltage Range: 5V to 60V
  • Output Current up to 1A
  • Internal 60V 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%)
  • 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 and U-DFN3030-6 Packages Available in Green Molding Compound (No Br, Sb)
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen- and Antimony-Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Product Specifications

Product Parameters

Qualified to AEC-Q10x No
Compliance (Only Automotive supports PPAP) Standard
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
MinimumInput Voltage (V) 5 V
MaximumInput Voltage (V) 60 V
Maximum Output Voltage (V) 56 V
Maximum LED Current (A) 1 A
LED Current Accuracy (%) 4 %
Switching Frequency Maximum (kHz) 1000 kHz
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency (%) 95 %
OperatingTemperatureRange  (°C) -40 to 105 °C
Sense Voltage (mV) 100 mV
AEC-Q100 Grade No

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TN1.pdf