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Evaluation Module for TPS61181A Six Strings LED Driver for Notebook Application



  • 4.5 V to 24 V Input Voltage
  • 38V Maximum Output Voltage
  • Integrated 1.5 A/40 V MOSFET
  • 1.0-MHz Switching Frequency
  • Adaptive Boost Output to WLED Voltages
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sinks of 30 mA
  • Up to 10 WLED in Series
  • 1% Typical Current Matching and Accuracy
  • Up to 1000:1 PWM Brightness Dimming
  • Minimized Output Ripple Under PWM Dimming
  • Driver for Input/Output Isolation PFET
  • True Shutdown
  • Over Voltage Protection
  • WLED Open/Short Protection
  • Built-in Soft Start

Texas Instruments  TPS61181AEVM-259

The TPS61181AEVM-259 user's guide describes the characteristics, operation, and use of the TPS6118xEVM-259 evaluation module (EVM). This EVM contains either Texas Instruments' TPS61181 (-001 build) or TPS61182 (-002 build) or TPS61181A (-003 build)-based WLED power solutions, each of which provides up to six independently regulated current outputs using a single inductor step-up (boost) converter. The current outputs are ideal for driving a WLED backlight in notebook/laptop computers. A separate EVM, WLEDEVM-260, contains eight strings of 10 series WLEDs and connects to the TPS6118x EVMs via a 14-pin ribbon cable to simplify evaluation. This user's guide includes EVM specifications, recommended test setup, test results, bill of materials, and a schematic diagram for the TPS61181/2/1AEVM.