MAX16826ATJ+T

MAXIM INTEGRATED PRODUCTS  MAX16826ATJ+T  芯片, 发光二极管驱动器

The is a programmable, four-string HB LED driver with output-voltage optimization and fault detection in 32 pin TQFN package. The MAX16826 high-brightness LED HB LED driver is designed for backlighting automotive LCD displays and other display applications such as industrial or desktop monitors and LCD televisions. The MAX16826 integrates a switching regulator controller, a 4-channel linear current sink driver, an analogue to digital converter ADC and an I2C interface. The IC is designed to withstand automotive load dump transients up to 40V and can operate under cold crank conditions. The MAX16826 contains a current-mode PWM switching regulator controller that regulates the output voltage to the LED array. The switching regulator section is configurable as a boost or SEPIC converter and its switching frequency is programmable from 100KHz to 1MHz.

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Supply voltage range is 4.75 V to 24V

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Operating temperature range from -40°C to 125°C

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Quiescent current is 5mA, shutdown current is 20µA and standby current is 3mA

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4 channels of programmable, fault protected, constant current source driver controller

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Integrated boost/SEPIC controller

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External MOSFETs allow wide-range LED current with multiple LEDs per string

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200KHz to 2MHz programmable switching frequency for optimizing size vs. efficiency

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External switching frequency synchronization

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I2C allows current sink drain voltages to be read and detect LED string fault conditions

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Cycle-by-cycle current limit, shorted LED string protection and overtemperature protection