Wide Input Voltage, High-Efficiency LED Driver with Integrated Boost Converter

A8502

Product Image

The A8502 simplifies LCD backlighting and LED lighting designs, integrating a boost converter, two current sinks, and comprehensive protection features. Its wide input voltage range (5V-40V) ensures robust performance in automotive applications.

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Top Features

Packaging

  • AEC-Q100 qualified
  • Wide input voltage range of 5 to 40 V for start/stop, cold crank and load dump requirements
  • Fully integrated LED current sinks and boost converter with 60 V DMOS
  • Sync function to synchronize boost converter switching frequency up to 2.3 MHz, allowing operation above the AM band
  • Excellent input voltage transient response
  • Single resistor primary OVP minimizes VOUT leakage
  • Internal secondary OVP for redundant protection
  • LED current of 120 mA per channel
  • Drives up to 12 series LEDs in 2 parallel strings
  • 0.7% to 0.8% LED to LED matching accuracy
  • PWM and analog dimming inputs
  • 5000:1 PWM dimming at 200 Hz
  • Provides driver for optional external PMOS input disconnect switch
  • Extensive protection against:
    • Shorted boost switch or inductor
    • Shorted FSET or ISET resistor
    • Shorted output
    • Open or shorted LED pin
    • Open boost Schottky
    • Overtemperature (OTP)

The A8502 is provided in a 16-pin TSSOP package (suffix LP) with an exposed pad for enhanced thermal dissipation. It is lead (Pb) free, with 100% matte tin lead frame plating.

LP Package Documentation

Part Number Specifications and Availability