MAX16834AUP+

MAXIM INTEGRATED PRODUCTS  MAX16834AUP+  芯片, 场效应管, MOSFET驱动器

The is a high power LED driver with integrated high-side LED current sense and PWM dimming MOSFET driver in 20 pin TSSOP package. It is a current-mode high brightness LED HB LED driver for boost, boost-buck, SEPIC and high side buck topologies. In addition to driving an N-channel power MOSFET switch controlled by the switching controller, it also drives an N-channel PWM dimming switch to achieve LED PWM dimming. The MAX16834 integrates all the building blocks necessary to implement a fixed frequency HB LED driver with wide-range dimming control. The MAX16834 features constant-frequency peak current mode control with programmable slope compensation to control the duty cycle of the PWM controller. A dimming driver designed to drive an external N-channel MOSFET in series with the LED string provides wide-range dimming control up to 20KHz. In addition to PWM dimming, the MAX16834 provides analogue dimming using a DC input at REFI.

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Supply voltage range is 4.75V to 28V

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

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3000:1 PWM dimming/analogue dimming

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Integrated high side current sense amplifier for LED current sense in boost-buck converter

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Internal 7V low dropout regulator

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100KHz to 1MHz programmable high frequency operation

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External clock synchronization input

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Works for input voltage greater than 28V with external voltage clamp on VIN for boost converter

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Programmable UVLO, programmable true differential overvoltage protection

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Fault output FLT for overvoltage, overcurrent and thermal warning faults