The A8522 provides flexible and precise control of multiple LED strings, featuring eight individually programmable current sinks, PWM dimming, and an I2C interface for simplified configuration and diagnostics.
Product Details
Product Details
Top Features
- AEC-Q100 qualified
- Wide input voltage range of 4.5 to 36 V
- Operates down to 3.9 V (VIN falling) for idle stop, and up to 40 V for load dump
- Integrated boost converter with DMOS switch and OVP protection up to 39 V
- 8 fully integrated LED current sinks, with individually programmable current up to 60 mA per channel
- I2C™ interface for programming LED current, PWM dimming, and various protection thresholds per channel
- Ability to drive multiple loads from a single IC
- Extensive PWM dimming (up to 10,000:1 at 100 Hz), individually programmable for each channel
- Extensive diagnostics and fault reporting
- Thermal warning and derating of LED current at higher temperatures
- Buffered PWM dimming control for all channels to facilitate localized dimming applications
- Polyphase PWM dimming: LED currents staggered to reduce light flickering and input ripple current
- Synchronize boost switching frequency: 400 kHz to 2.3 MHz to allow operation below or above the AM band
- Programmable frequency dithering to reduce EMI
- Typical LED current accuracy of 0.7%, and LED-to-LED matching accuracy of 0.8%
- Protection Features
- Open/shorted LED pin detection
- Programmable LED string short detection
- Open/shorted external components (including boost inductor, Schottky diode, FSET resistor and so forth)
- Input overcurrent protection against output to GND short
- Cycle-by-cycle switch current limit
- Overtemperature, and output overvoltage and undervoltage protection
Typical Applications
- Infotainment
- Cluster
- Center-Stack Lighting
- Head-Up Display (HUD)
- Daytime Running Lights (DRL)
