LM3639A Overview
The LM3639A is a single-chip white LED Camera Flash Driver + LCD Display Backlight Driver. The lowvoltage, high-current flash LED driver is a synchronous boost which provides the power for a single flash LED at up to 1.5A or dual LEDs at up to 750 mA each. The high-voltage backlight driver is a dual-output asynchronous boost which powers dual LED strings at up to 40V and 30 mA per string.
LM3639A Key Features
- 2 Single Chip White LED Flash and Backlight Driver
- 1.5A Flash LED Current
- Dual String Backlight Control (40V Max VOUT)
- 128 Level Exponential and Linear Brightness
- PWM Input for CABC
- Programmable Over-Voltage Protection
- Programmable Current Limit (Flash)
- Programmable Switching Frequency
- Optimized Flash Current During Low-Battery