Diodes Incorporated has released the AL3353 LED/LCD 40V max input boost controller, suitable across a broad range of applications where a constant voltage or constant current are needed to drive displays and backlights with a dimming ratio of 100:1. It is ideal for application as a backlight driver for LCD TVs, LCD monitors, and flat panel displays, as well as an LED driver for commercial lighting applications.
The device is a multipurpose boost controller providing a broad input voltage of 9V to 40V, enabling it to simply adapt to a mixture of common supply voltages, such as 12V, 24V, and 36V, without additional configuration or loss of efficiency. The device also comprises comprehensive and robust circuit protection based on proprietary technology.
As well as a wide input voltage range and superior dimming capabilities, the device provides extensive protection created specifically for the target applications. This comprises diode and inductor short protection, LED-open protection, LED cathode short-to-GND protection, and power MOSFET overcurrent protection. Other protection features are under-voltage lock-out, output overvoltage and over-temperature protection, and Vout-short protection.