Регуляторы тока светодиодных ламп MAX16834ATP+

Драйвер светодиода , понижающий-повышающий, SEPIC, 4.75В - 28В вход, частота 1МГц, 3A выход, TQFN-20

The MAX16834ATP+ is a high power LED driver with integrated high-side LED current sense and PWM dimming MOSFET driver in 20 pin TQFN 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.

• Supply voltage range is 4.75V to 28V
• Operating temperature range from -40°C to 125°C
• 3000:1 PWM dimming
• analogue dimming
• Integrated high side current sense amplifier for LED current sense in boost-buck converter
• Internal 7V low dropout regulator
• 100KHz to 1MHz programmable high frequency operation
• External clock synchronization input
• Works for input voltage greater than 28V with external voltage clamp on VIN for boost converter
• Programmable UVLO, programmable true differential overvoltage protection

• Fault output (FLT) for overvoltage, overcurrent and thermal warning faults

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