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A8521 - High Efficiency Fault Tolerant LED Driver

General Description

The A8521 is a multi-output white LED driver for small-size LCD backlighting.

It integrates a current-mode boost converter with internal power switch and four current sinks.

The boost converter can drive up to 48 LEDs, 12 LEDs per string, at 80 mA.

Key Features

  • 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 p.

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The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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A8521 Wide Input Voltage Range, High Efficiency Fault Tolerant LED Driver Features and Benefits • 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 80 mA per channel • Drives up to 12 series LEDs in 4 parallel strings • 0.7% to 0.