Product details


Topology Buck Vin (Min) (V) 7 Vin (Max) (V) 85 Iout (Max) (A) 5 Iq (Typ) (mA) 2 Operating temperature range (C) -40 to 125 Dimming method Analog, PWM open-in-new Find other Illumination LED drivers

Package | Pins | Size

HTSSOP (PWP) 16 32 mm² 5 x 6.4 open-in-new Find other Illumination LED drivers


  • VIN Range from 7 V to 85 V
  • Wide Dimming Range
    • 500:1 Analog Dimming
    • 2500:1 Standard PWM Dimming
    • 20000:1 Shunt FET PWM Dimming
  • Adjustable LED Current Sense Voltage
  • 2-Ω, 1-Apeak MOSFET Gate Drivers
  • Shunt Dimming MOSFET Gate Driver (TPS92641)
  • Programmable Switching Frequency
  • Precision Voltage Reference 3 V ±2%
  • Input UVLO and Output OVP
  • Low Power Shutdown Mode and Thermal Shutdown
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The TPS92640 and TPS92641 devices are high-voltage, synchronous NFET controllers for buck-current regulators. Output current regulation is based on valley current-mode operation using a controlled on-time architecture. This control method eases the design of loop compensation while maintaining nearly constant switching frequency. The TPS92640 and TPS92641 devices include a high-voltage start-up regulator that operates over a wide input range of 7 V to 85 V. The PWM controller is designed for high speed capability, including an oscillator frequency range up to 1 MHz. The deadtime between high side and low side gate driver is optimized to provide very high efficiency over a wide input operating voltage and output power range. The TPS92640 and TPS92641 devices accept both analog and PWM input signals, resulting in exceptional dimming control range. Linear response characteristics between input command and LED current is achieved with true zero LED current using low off-set error amplifier and proprietary PWM dimming logic. Both devices also include precision reference capable of supplying current to low power microcontroller. Protection features include cycle-by-cycle current protection, overvoltage protection, and thermal shutdown. The TPS92641 device includes a shunt FET dimming input and MOSFET driver for high resolution PWM dimming.

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Technical documentation

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Type Title Date
* Datasheet TPS9264x Synchronous Buck Controllers for Precision Dimming LED Drivers datasheet (Rev. A) Oct. 28, 2015
White paper Common LED Functions and LED Driver Design Considerations Sep. 21, 2020
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
Application note Brightness Turbo TPS92641 Application Note Jan. 14, 2015
Technical article Take better selfies with innovative LED flashes Nov. 18, 2014
Technical article Solving the automotive EMI issues in new cars with all the screens Sep. 11, 2014
User guide User's Guide for TPS92641EVM Nov. 19, 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

Using TPS92641 to drive 10 LEDs in series at 1A current.

Related Terms:

  • DC DC LED current controller
  • DC DC LED Buck current controller
  • VIN Range 43V to 53V
  • Drive 10 LEDs in series at 1A
  • High efficiency Sync. Rect. Buck
  • Current regulation within 3%
  • Support PWM dimming

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
  • (...)

Reference designs

Display LED driver reference design
TIDA-080008 — This reference design describes the characteristics, operation, and use of the LED/laser driver. This driver contains our TPS92641 IC configured as a solid-state driver solution providing a 3-channel regulated current output to drive 3 solid-state devices. A high-efficiency single inductor (...)
document-generic Schematic document-generic User guide
100W Dimmable DC-DC LED Driver with Daylight Harvesting and Wireless Connectivity Reference Design
TIDA-01095 — The TIDA-01095 TI design is a tested DC-DC LED driver subsystem for high power, high efficiency dimmable LED luminaires. It is built-on a wireless SoC platform which can enable intensity adjustment through analog, PWM dimming and control using any BLE smart device or ZiBee. High Bay and Low bay LED (...)
document-generic Schematic document-generic User guide
Single LED with High Current 20A Application using TPS92641
PMP8016 The main purpose of this reference design is to demonstrate a high performance, high current and easy to use, synchronous buck LED driver based on TPS92641. This LED driver is designed for application with using high power single LED within 20A.The operating conditions and performance of the (...)

CAD/CAE symbols

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HTSSOP (PWP) 16 View options

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