ATMSL2162DQ

Series:	*
Part Status:	Obsolete
Base Part Number:	MSL2162

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ATMSL2162DQ Application Field and Working Principle

The ATMSL2162DQ is a high-speed, high-voltage linear LED driver for backlight LCD applications from Atmel. It is classified as a PMIC - LED driver, as it provides continuous, linear regulation of current for LED backlights used in LCDs.The LED driver reproduces high-resolution gradation using pulse width modulation (PWM) to smoothly vary LED brightness levels and dimming characteristics. The LED driver also features deglitching and PLL-based clock synchronization features, making it suitable for applications with different PWM frequencies.The ATMSL2162DQ has an adjustable output current of up to 20mA, and its wide input voltage range of up to 24V allows it to be used in various LCD display screens. It also features an enable pin and a separate digital interface for ON/OFF control.The ATMSL2162DQ responds to dimming signals from PWM dimming controller by detecting the rising edge of a PWM pulse and switching on the LEDs in a determined sequence. During this period, the output current is constant and does not vary with the time duration of input signals. The ATMSL2162DQ has a fail-safe feature that shuts off the LED switch when the output of an external PWM dimming controller is too high or too low. This prevents the LED driver from operating in an undesirable condition. The ATMSL2162DQ offers several advantages over standard LED drivers. It requires less external components, has a low standby current consumption, and is capable of internal power regulation. It is also very efficient in dimming performance and operates under low noise conditions.The ATMSL2162DQ also offers a choice of three different operating modes:1. Constant current (CC) mode: This mode provides a constant current to the LED, allowing for easy brightness control. 2. PWM Input mode: This mode allows for a digital PWM signal to be used for dimming the LEDs. 3. Automatic brightness control (ABC) mode: This mode uses a variable voltage input to provide automatic brightness control based on the ambient light levels in the environment. To sum up, the ATMSL2162DQ is a high-performance, high-voltage linear LED driver for backlight LCDs. It features adjustable current output and excellent efficiency in dimming performance. It is also suitable for various LCD applications due to its wide input voltage range. The ATMSL2162DQ provides all the features and performance needed to drive LEDs in LCD applications.

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