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TPS61181

ACTIVE

1.5A white LED driver for notebooks with build in LDO

Product details

Number of channels 6 Vin (min) (V) 5 Vin (max) (V) 24 Vout (min) (V) 5 Vout (max) (V) 39 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 25 Peak efficiency (%) 90 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 6 Vin (min) (V) 5 Vin (max) (V) 24 Vout (min) (V) 5 Vout (max) (V) 39 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 25 Peak efficiency (%) 90 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
WQFN (RTE) 16 9 mm² 3 x 3
  • 5 V to 24 V Input Voltage
  • Integrated 1.5 A 40 V MOSFET
  • 1.0 MHz/1.3 MHz Switching Frequency
  • Boost Output Auto-Adaptive to WLED Voltages
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sink of 25 mA
  • Up to 10 WLED in Series
  • Less Than 3% Current Matching and Accuracy
  • Up to 1000:1 PWM Brightness DImming Range
  • 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
  • 16L 3 mm×3 mm QFN
  • 5 V to 24 V Input Voltage
  • Integrated 1.5 A 40 V MOSFET
  • 1.0 MHz/1.3 MHz Switching Frequency
  • Boost Output Auto-Adaptive to WLED Voltages
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sink of 25 mA
  • Up to 10 WLED in Series
  • Less Than 3% Current Matching and Accuracy
  • Up to 1000:1 PWM Brightness DImming Range
  • 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
  • 16L 3 mm×3 mm QFN

The TPS61180/1/2 ICs provide highly integrated solutions for media size LCD backlight. These devices have a built-in high efficiency boost regulator with integrated 1.5A/40V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLED. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The devices support pulse width modulation (PWM) brightness dimming. During dimming, the WLED current is turned on/off at the duty cycle and frequency determined by the PWM signal input on the DCRTL pin. One potential issue of PWM dimming is audible noises from the output ceramic capacitors. The TPS61180/1/2 family is designed to minimize this output AC ripple across a wide dimming duty cycle and frequency range; therefore, reducing the audible noise.

The TPS61180/1/2 ICs provide a driver output for an external PFET connected between the input and inductor. During short circuit or over-current conditions, the ICs turn off the external PFET and disconnect the battery from the WLEDs. The PFET is also turned off during IC shutdown (true shutdown) to prevent any leakage current of the battery. The device also integrates over-voltage protection, soft-start and thermal shutdown.

The TPS61180 IC requires external 3.3V IC supply, while TPS61181 and TPS61182 ICs have a built-in linear regulator for the IC supply. All the devices are in a 3×3 mm QFN package.

The TPS61180/1/2 ICs provide highly integrated solutions for media size LCD backlight. These devices have a built-in high efficiency boost regulator with integrated 1.5A/40V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLED. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The devices support pulse width modulation (PWM) brightness dimming. During dimming, the WLED current is turned on/off at the duty cycle and frequency determined by the PWM signal input on the DCRTL pin. One potential issue of PWM dimming is audible noises from the output ceramic capacitors. The TPS61180/1/2 family is designed to minimize this output AC ripple across a wide dimming duty cycle and frequency range; therefore, reducing the audible noise.

The TPS61180/1/2 ICs provide a driver output for an external PFET connected between the input and inductor. During short circuit or over-current conditions, the ICs turn off the external PFET and disconnect the battery from the WLEDs. The PFET is also turned off during IC shutdown (true shutdown) to prevent any leakage current of the battery. The device also integrates over-voltage protection, soft-start and thermal shutdown.

The TPS61180 IC requires external 3.3V IC supply, while TPS61181 and TPS61182 ICs have a built-in linear regulator for the IC supply. All the devices are in a 3×3 mm QFN package.

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Technical documentation

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Type Title Date
* Data sheet WLED DRIVER FOR NOTEBOOK DISPLAY. datasheet (Rev. E) 11 Apr 2013
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Application note Some Guidelines and Tips for the LED Driver Application 14 Aug 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 Dec 2018
Application note Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) 29 Nov 2017
Application note Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 15 Jun 2017
Application note Analog Dimming with the TPS61181 08 Nov 2011
EVM User's guide TPS61181EVM-259 / TPS61182EVM-259 (Rev. B) 12 May 2011
Application note TPS61181 One-Cell Battery Application for Tablet PC Backlight 09 Sep 2010

Design & development

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

Evaluation board

SN65DSI83Q1-EVM — MIPI® DSI to LVDS bridge & FlatLink™ integrated circuit evaluation module

The SN65DSI83Q1-EVM evaluation module (EVM) is a printed circuit board (PCB) that helps customers implement the SN65DSI83-Q1 device in system hardware.  This EVM includes on-board connectors for DSI input and LVDS output signals.  These connectors are for connecting (...)
User guide: PDF
Not available on TI.com
Evaluation board

SN65DSI85Q1-EVM — Dual-Channel MIPI® DSI to Dual-Link FlatLink™ LVDS Bridge Evaluation Module

The SN65DSI85Q1EVM is a PCB created to help customers implementing SN65DSI85Q1 in system hardware.  This EVM includes on-board connectors for DSI input and LVDS output signals.  These connectors are for connecting MIPI DPHY compliant DSI source and LVDS panels to the EVM.
User guide: PDF
Not available on TI.com
Evaluation board

TPS61181EVM-259 — TPS61181EVM-259 Evaluation Module

The TPS61181EVM-259 facilitates evaluation of the TPS61181 1.5 A White LED Driver for Notebooks. This IC provides a highly integrated solution for media size LCD backlight. The device has a built-in high efficiency boost regulator with integrated 1.5 A/40 V power MOSFET.

User guide: PDF
Not available on TI.com
Evaluation board

WLEDEVM-260 — WLEDEVM-260 Evaluation Module

The WLEDEVM-260 load board contains 8 white light emitting diode (WLED) banks/strings which contain either 10 or 12 WLEDs as selected by the odd numbered jumpers (JP1, JP3, etc.). It is used with the TPS61181EVM-259 or TPS61182EVM-259 Evaluation Module to demonstrate functionality of the (...)

Not available on TI.com
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 (...)
Package Pins CAD symbols, footprints & 3D models
WQFN (RTE) 16 Ultra Librarian

Ordering & quality

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