The A8500 is a multi-output WLED driver for medium display backlighting. It 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. 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 current-mode converter. Each LED channel can sink 25 mA, and channels can be paralleled for higher currents. Flexible dimming allows output channels to either run at an adjustable DC value or with externally controlled PWM duty cycles.
The A8500 is a multi‑output WLED/RGB backlight driver designed for medium‑size LCD displays. It integrates a boost converter and eight current‑sink channels, supporting flexible dimming via PWM, EN, or APWM pins and offering active current sharing for accurate LED current matching.
The device operates from a 4.2‑5.5 V input, boosts the voltage up to 47 V, and can drive up to 96 LEDs (12 series × 8 parallel). It features adjustable over‑voltage protection, thermal shutdown, soft‑start, and a selectable switching frequency from 200 kHz to 2 MHz.
| Input Voltage Range | 4.2 V – 5.5 V |
|---|---|
| Maximum LED Sink Current | 25 mA per channel |
| Boost Converter Output Voltage | up to 47 V |
| Switching Frequency Range | 200 kHz – 2 MHz |
| Maximum Number of LEDs | 96 LEDs (12 × 8) |
| Thermal Shutdown Threshold | 165 °C |
The A8500 operates with an input voltage between 4.2 V and 5.5 V.
It can drive up to 96 LEDs, arranged as 12 series strings with up to 8 parallel strings.
Each LED sink is rated for a maximum of 25 mA.