Product details


Number of channels (#) 6 Vin (Min) (V) 5 Vin (Max) (V) 24 Vout (Min) (V) 5 Vout (Max) (V) 40 Type Inductive Switching frequency (Max) (kHz) 1000 LED current per channel (mA) 30 Peak efficiency (%) 94 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (C) -40 to 85 open-in-new Find other Backlight LED drivers

Package | Pins | Size

WQFN (RTJ) 20 16 mm² 4 x 4 open-in-new Find other Backlight LED drivers


  • Input Voltage 4.5 V to 24 V
  • Maximum Output Voltage 38 V
  • Integrated 2-A, 40-V MOSFET
  • Programmable Switching Frequency 300 kHz to 1 MHz
  • Adaptive Boost Output to WLED Voltages
  • Wide PWM Dimming Frequency Range
    • 100 Hz to 50 KHz for Direct PWM Mode
    • 100 Hz to 22 KHz for Frequency Programmable Mode
  • 100:1 Dimming Ratio at 20 kHz
  • 10000:1 Dimming Ratio at 200 Hz (Direct PWM mode)
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sinks of 30 mA Maximum
  • 1.5% (Typical) Current Matching
  • PWM Brightness Interface Control
  • PWM Phase Shift Mode Brightness Dimming Method or Direct PWM Dimming Method
  • HBM ESD Protection 4 kV
  • Programmable Overvoltage Threshold
  • Built-in WLED Open/Short Protection
  • Thermal Shutdown
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The TPS61187 device provides a highly integrated white-light-emitting-diode (WLED) driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2-A, 40-V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.

The TPS61187 supports the automatic phase-shift-dimming method and direct-PWM-dimming method. During phase-shift-PWM dimming, the WLED current is turned on and turned off at the duty cycle controlled by the input PWM signal, and each channel is shifted according to the frequency determined by an integrated pulse-width-modulation (PWM) signal. The frequency of this signal is resistor programmable, while the duty cycle is controlled directly from an external PWM signal input to the PWM pin. During direct PWM dimming, the WLED current is turned on and/or turned off synchronized with the input PWM signal.

For all available packages, see the orderable addendum at the end of the data sheet.
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Technical documentation

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Type Title Date
* Data sheet TPS61187 White-LED Driver For Notebooks With PWM Interface and Automatic Phase Shift datasheet (Rev. E) Dec. 29, 2016
White paper Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
Technical article Overcoming challenges for backlight LED drivers in automotive display solutions Jul. 16, 2020
Application note Some Guidelines and Tips for the LED Driver Application Aug. 14, 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) Dec. 11, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical article Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical article LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical article Take better selfies with innovative LED flashes Nov. 18, 2014

Design & development

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Hardware development

document-generic User guide
The TPS61183/7EVM-528 evaluation module contains Texas Instruments' either the TPS61183 or TPS61187 IC configured as a WLED power solution providing up to six independently regulated current outputs using a single inductor step-up (boost) converter. The current outputs are ideal for driving a WLED (...)
  • 4.5V to 24V input voltage
  • 38V maximum output voltage
  • Integrated 2A 40V MOSFET
  • 300 kHz to 1 MHz Programmable Switching Frequency
  • Adaptive boost output to WLED voltages
  • Small external components
  • Integrated loop compensation
  • Six current sinks of 30mA max.
  • 1.5% (typ.) current matching

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

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QFN (RTJ) 20 View options

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