LT3750EMS#PBF

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Specialized ICs: LT3750EMS#PBF Application Field and Working Principle

The LT3750EMS#PBF is a highly integratedlt, dual-channel LED driver, specifically designed for LED backlight applications. It is a high performance, low quiescent current, charge-pump architecture device that is designed to drive LEDs with constant current accuracy. The LT3750EMS#PBF can be used in LCD TV, desktop monitors and laptop monitors to dim the LED backlight. The part is designed with a wide input voltage range of 2.7V to 28V and can support up to 24 LEDs in series on each channel.

The LT3750EMS#PBF utilizes a charge-pump topology to provide variable current up to 300mA on each internal channel. It features an integrated switching regulator, plus integrated 1Ω MOSFETs for each channel, making it both efficient and cost effective. Its internal loop compensation greatly simplifies the design process, allowing for faster turn-around times. The part also features a low shutdown current, a low operating temperature range, and a battery input.

The LT3750EMS#PBF includes a wide variety of features to provide maximum control and flexibility in dimming applications. It includes a dimming control port which can accept an analog 0V to 3.3V input, and a PWM input with a frequency range of 250 Hz to 10 kHz. The part also provides a programmable soft-start function and a programmable maximum current limit. The IC also includes a wide variety of programmable safety features such as over-temperature protection, over-voltage protection, and short-circuit protection.

The LT3750EMS#PBF is designed with a number of other features to maintain constant current accuracy. It includes an integrated temperature sensor to adjust the LED current based on temperature variations and an under-voltage lockout function to prevent runaway LED current in the event of a voltage drop. The IC also includes an LED fail-safe mode, which will shut down the LED current if an LED fails.

In summary, the LT3750EMS#PBF is an ideal solution for LED backlighting applications. Its wide input voltage range, integrated switching regulator and low quiescent current make it an efficient and cost effective solution. Its wide variety of safety and control features provide maximum flexibility when designing LED backlighting applications.

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