Allegro MicroSystems A8500
The A8500 is a multi-output WLED driver for medium display backlighting. The A8500 integrates a boost converter and eight current-sinks to provide a flexible WLED/RGB backlight driver. The boost converter can provide output voltage up to 47 V.| Part No. | A8500 |
|---|---|
| Datasheet | A8500 Download |
| Manufacturer |  Allegro MicroSystems |
| Description | Flexible WLED/RGB Backlight Driver |
| Buy | Stock & Price |
FEATURES AND BENEFITS
● Active current sharing between LED strings for ±1.5% typical current matching and ±1.2% typical accuracy● Drive up to 12 series × 8 parallel = 96 LEDs (Vf = 3.2 V, If = 20 mA)
● Flexible dimming, using alternative methods: ▫ LED duty cycle control (PWM pin) ▫ DC current using serial programming (EN pin) ▫ DC current using external PWM signal (APWM pin) ▫ An external resistor
● Boost converter with integrated 50 V, 2 A DMOS
● LED sinks rated for 25 mA
● 200 kHz to 2 MHz switching frequency
● Open LED disconnect
● Boost current limit, thermal shutdown, and soft start
● No audible ceramic capacitor noise during PWM dimming
● Adjustable overvoltage protection (OVP)
● No pull-up resistors required for LED modules that use ESD capacitors PACKAGE: 26 pin QFN/MLP (suffix EC)
DESCRIPTION
The flexible channel selection control and high voltage capability allow a wide range of LED backlight applications. The A8500 can support any application requiring 4 to 96 WLEDs. The boost converter is a constant frequency currentmode converter.
