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Product details

Parameters

Channels (#) 6 Vin (Min) (V) 2.7 Vin (Max) (V) 6.5 Switching frequency (Max) (kHz) 1000 Product type Inductive LED current per channel (mA) 35 Shutdown current (Typ) (uA) 2 Topology Boost Peak efficiency (%) 90 Features OVP Operating temperature range (C) -40 to 85 open-in-new Find other Backlight LED drivers

Package | Pins | Size

WQFN (RTE) 16 9 mm² 3 x 3 open-in-new Find other Backlight LED drivers

Features

  • 2.7-V to 6.5-V VIN Voltage Range
  • 2.7-V to 24-V Boost Input Voltage Range
  • Integrated 2-A/40-V MOSFET
  • 1-MHz Switching Frequency
  • Adaptive Boost Output to WLED Voltages
  • Six Current Sinks of 35 mA Capability Each
  • ±2% (Maximum) Current Accuracy
  • 1.3% (Typical) Current Matching
  • 100-Hz to 22-kHz Input PWM Frequency
  • Mixed Dimming Mode: Automatic Switch Between
    Analog Dimming and PWM Dimming
    • Programmable Switch Point: 25% or 12.5%
    • Programmable PWM Dimming Mode: 22-kHz
      PWM Dimming, Direct PWM Dimming
  • Up to 14-bit Dimming Resolution
  • Support Down to 1% Dimming Duty Cycle
  • Input PWM Glitch Filter
  • Up to 90% Efficiency
  • Driver for Input and Output Isolation PFET for
    True Shutdown
  • Built-in WLED Open and Short Protection
  • Thermal Shutdown
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Description

The TPS61176 is an integrated WLED backlight driver for tablets or notebook PCs using single-cell batteries. It comprises a high-efficiency boost converter with an integrated 2-A, 40-V power MOSFET, and six current sink regulators. The device can drive up to 60 WLEDs. The boost output voltage automatically adjusts to the WLED forward voltage to improve efficiency.

The TPS61176 supports mixed dimming mode. The automatic switch between PWM dimming and analog dimming increases the overall electrical-to-optical efficiency, reducing power of the backlight significantly. The switch point can be programmed to 12.5% or 25%. PWM dimming mode can also be programmed to fixed frequency dimming or direct PWM dimming. The device supports up to 14-bit dimming resolution to avoid potential flickering during low brightness dimming.

True shutdown is supported with a driver for an external isolation P-channel MOSFET. When the device is disabled or the boost output is shorted to ground, the isolation PFET is turned off to cut off the power path from battery preventing any leakage current from the battery. The device also integrates soft start, thermal shutdown, WLED open and short protection. Its 16-pin WQFN package provides a space-saving and high-performance WLED driver solution.

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Technical documentation

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Type Title Date
* Datasheet TPS61176 High-Efficiency 6-Channel WLED Driver Supporting Single-Cell Li-Ion Battery Input datasheet (Rev. B) Aug. 27, 2015
Selection guides Power Management Guide 2018 (Rev. R) Jun. 25, 2018
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Technical articles LED brightness adjustment: high-frequency PWM dimming Aug. 26, 2016
Technical articles Take better selfies with innovative LED flashes Nov. 18, 2014
Technical articles Solving the automotive EMI issues in new cars with all the screens Sep. 10, 2014
User guides TPS61176EVM-566 User's Guide Dec. 05, 2013

Design & development

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

Hardware development

EVALUATION BOARDS Download
$49.00
Description

The Texas Instruments TPS61176EVM-566 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS61176 , which are multi-channel WLED drivers providing highly integrated solutions for tablet or notebook PCs, which can support single-cell battery input directly. The EVM (...)

Features

Multi-channel
Adaptive to a variety of load
Mixed mode dimming supportive

  • Multi-channel
  • Adaptive to a variety of load
  • Mixed mode dimming supportive

CAD/CAE symbols

Package Pins Download
WQFN (RTE) 16 View options

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