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Evaluation Module, Boost & Boost to Battery LED Driver, Power String of Series LED's, PWM Dimming


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Product Overview

The TPS92692EVM-880 from Texas Instruments is a TPS92692-Q1 boost and boost to battery LED driver evaluation module. It is fully assembled and tested LED driver that can be configured as either a boost or a boost to battery topology to power a single string of series connected LEDs. Accurate closed-loop LED current regulation is achieved using a low offset rail to rail current sense amplifier along with high side current-sensing implementations. DC LED current set point can be varied over a 15:1 ratio using high-impedance analogue adjust (IADJ) input. PWM dimming of LED current is achieved by directly modulating the PWM/DIM input pin with the desired duty cycle or by enabling the internal PWM generator circuit. Optional PDRV gate driver output can be used to drive an external P-Channel series MOSFET. It supports continuous LED status check through the current monitor (IMON) output. Includes open drain fault indicator output to indicate LED output overvoltage & undervoltage conditions.
  • Versatile LED driver capable of driving a string of 1 to 20 series-connected white LEDs
  • Wide input voltage range of 4.5V to 18V
  • Better than ±4% LED current regulation using a high-side current sense resistor
  • Spread spectrum frequency modulation for improved EMC
  • Internal analogue voltage to PWM duty cycle generator for stand-alone dimming operation
  • Supports boost, buck-boost (boost to battery), SEPIC and flyback LED driver topologies
  • Supports automotive start-stop and load dump transients up to 65Vmax



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