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Controladores para LED de retroiluminación

TPS61176

ACTIVO

Controlador WLED de 6 canales de alta eficiencia compatible con entrada de batería de ion litio de u

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TPS61176

ACTIVO
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Detalles del producto

Number of channels 6 Vin (min) (V) 2.7 Vin (max) (V) 6.5 Vout (min) (V) 2.7 Vout (max) (V) 38 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 93 LED current per channel (mA) 35 Peak efficiency (%) 90 Topology Boost Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 6 Vin (min) (V) 2.7 Vin (max) (V) 6.5 Vout (min) (V) 2.7 Vout (max) (V) 38 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 93 LED current per channel (mA) 35 Peak efficiency (%) 90 Topology Boost Operating temperature range (°C) -40 to 85 Rating Catalog
WQFN (RTE) 16 9 mm² 3 x 3
  • 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
  • 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

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.

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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Documentación técnica

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* Data sheet TPS61176 High-Efficiency 6-Channel WLED Driver Supporting Single-Cell Li-Ion Battery Input datasheet (Rev. B) PDF | HTML 27 ago 2015
White paper Common LED Functions and LED Driver Design Considerations 21 sep 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
User guide TPS61176EVM-566 User's Guide 05 dic 2013

Diseño y desarrollo

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Placa de evaluación

TPS61176EVM-566 — Módulo de evaluación de controlador WLED de 6 canales de alta eficiencia compatible con entrada de b

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 (...)

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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 (...)
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  • Monitoreo continuo de confiabilidad
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