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Diodes Incorporated AL8853AQ Boost Controller

Diodes Incorporated AL8853AQ Boost Controller is an automotive AEC-Q100 highly integrated and cost-effective boost controller. This controller contains a Pulse-Width Modulation (PWM) boost driver that uses current-mode control and fixed-frequency operation to regulate the LED current. This LED current is sensed through an external current-sense resistor. The AL8853AQ boost controller operates at a wide input voltage range of 6V to 40V and has a high-precision feedback reference voltage of 200mV. This boost controller offers PWM to analog dimming mode for a wide range of dimming controls and features a 400kHz fixed switching frequency. The AL8853AQ boost controller is ideally used in automotive LED lamps, fog lights, reversing lights, headlights, auto head-up displays, and DC-DC converters.

Features

  • 6V to 40V Wide input-voltage range
  • AEC-Q100 Grade 1 qualified
  • 200mV/±3% High-precision feedback reference voltage
  • Current-mode PWM controller with good dynamic response
  • PWM to Analog dimming mode
  • Fixed 400kHz switching frequency
  • -40°C to 125°C Operating temperature range
  • Available in Pb-free SO-8 package
  • RoHS compliant
  • Built-in comprehensive protections:
    • Undervoltage Lockout (UVLO)
    • Output Overvoltage Protection (OVP)
    • Power MOSFET Overcurrent Protection (OCP)
    • Diode and Inductor short protection
    • LED cathode short to GND protection
    • LED open protection
    • VOUT short protection
    • Overtemperature Protection (OTP)

Applications

  • Automotive LED lamps
  • Fog lights
  • Reversing lights
  • Daytime running lights
  • Headlights
  • Auto head up displays
  • Infotainment and cluster backlight displays
  • DC-DC converters

Typical Application Circuits

Application Circuit Diagram - Diodes Incorporated AL8853AQ Boost Controller

Block Diagram

Block Diagram - Diodes Incorporated AL8853AQ Boost Controller
Published: 2023-07-20 | Updated: 2024-03-06