LX23224IDB

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LX23224IDB is a monolithic constant current LED driver integrated circuit designed and developed for driving LEDs. It features a wide operating voltage range of 4.75V to 75V and a PWM dimming range that expands from 100Hz to 1kHz. The integrated voltage, switching and charging circuits make the device a high performance and highly efficient LED driver that offers superior thermal drift performance and extreme LED constant current precision.

Applications and Working Principle

The LX23224IDB is primarily used to drive constant current LED strings. As a driver, it can achieve line regulation of 0.02%, load regulation of 0.02%, on-die temperature coefficient of -0.2%, and on-die temperature coefficient temperature coefficient of -0.2%. It is also capable of wide input voltage range and PWM dimming range that allows it to drive LED strings across a wide voltage and dimming range, which is perfect for LED lighting applications requiring high efficiency and precision.

In addition, the active clamp feature of the device helps ensure no shoot-through event occurs and accurate output current regulation over the entire operating range. The integrated switching/charging circuitry along with the current control loop also help ensure that the output current ripple meets the design parameters. The integrated error amplifier with a wide bandwidth of 500kHz helps ensure fast transient response to the load changes.

The LX23224IDB has internal current sensing, using an integrated resistor for current setting and regulation. The on-die temperature coefficient provides a stability of the output current across an extended temperature range. The device supports PWM dimming control through an enable pin, allowing the user to enable or disable the output current.

In summary, the LX23224IDB is a high-efficiency and high-precision monolithic constant current LED driver. It provides a wide operating voltage range, PWM dimming, on-die temperature coefficient, and active clamp feature, and is perfect for LED lighting applications requiring high efficiency and precision. The integrated switching/charging circuitry and error amplifier, along with the current control loop, provide fast transient response, line and load regulation, and current ripple accuracy.

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