Product details

Input voltage (type) AC/DC Topology Buck Vin (Min) (V) 7 Vin (Max) (V) 85 Iout (Max) (A) 5 Iq (Typ) (mA) 2 Features OVP, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM
Input voltage (type) AC/DC Topology Buck Vin (Min) (V) 7 Vin (Max) (V) 85 Iout (Max) (A) 5 Iq (Typ) (mA) 2 Features OVP, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • 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
  • 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

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.

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
* Data sheet TPS9264x Synchronous Buck Controllers for Precision Dimming LED Drivers datasheet (Rev. A) 28 Oct 2015
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Technical article Here's how body electronics and lighting technology are changing the driving experience 26 Sep 2016
Technical article LED brightness adjustment: high-frequency PWM dimming 26 Aug 2016
Application note Brightness Turbo TPS92641 Application Note 14 Jan 2015
Technical article Take better selfies with innovative LED flashes 18 Nov 2014
Technical article Solving the automotive EMI issues in new cars with all the screens 11 Sep 2014
User guide User's Guide for TPS92641EVM 19 Nov 2012

Design & development

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Evaluation board

TPS92641EVM — Synchronous Buck Controllers for Precision Dimming LED Drive Evaluation Module Board

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


Related Terms:

  • DC DC LED current controller
  • DC DC LED Buck current controller
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Reference designs

TIDA-080008 — Display LED driver reference design

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 (...)
Reference designs

TIDA-01095 — 100W Dimmable DC-DC LED Driver with Daylight Harvesting and Wireless Connectivity Reference Design

This reference design is a tested DC/DC LED driver for high power and 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 ZigBee. High bay and low bay LED (...)
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