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TPS61195

ACTIVO

Controlador de LED blanco de 96 LED y 8 canales para retroiluminación LCD con interfaz SMBus

Detalles del producto

Number of channels 8 Vin (min) (V) 4.5 Vin (max) (V) 21 Vout (min) (V) 15 Vout (max) (V) 45 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 94 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 8 Vin (min) (V) 4.5 Vin (max) (V) 21 Vout (min) (V) 15 Vout (max) (V) 45 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 94 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
WQFN (RUY) 28 16 mm² 4 x 4
  • 4.5V to 21V Input Voltage
  • Integrated 2.5A 50V MOSFET
  • 600kHz to 1MHz Programmable Switching Frequency
  • Adaptive Boost Output for Best Efficiency
  • Designed to Use Small L-C Components
  • Internal Loop Compensation
  • Eight Current Sinks of 30mA
  • Support up to Total 96 LEDs
  • 1% Current Matching
  • PWM and SMBus Brightness Interface
  • 8-bits (256 steps) Brightness Level
  • Programmable Over Voltage Threshold
  • Built-in WLED Open/Short Protection
  • Over Thermal Protection
  • 28L 4×4 WQFN
  • APPLICATIONS
    • Notebook/Netbook LCD Display Backlighting

  • 4.5V to 21V Input Voltage
  • Integrated 2.5A 50V MOSFET
  • 600kHz to 1MHz Programmable Switching Frequency
  • Adaptive Boost Output for Best Efficiency
  • Designed to Use Small L-C Components
  • Internal Loop Compensation
  • Eight Current Sinks of 30mA
  • Support up to Total 96 LEDs
  • 1% Current Matching
  • PWM and SMBus Brightness Interface
  • 8-bits (256 steps) Brightness Level
  • Programmable Over Voltage Threshold
  • Built-in WLED Open/Short Protection
  • Over Thermal Protection
  • 28L 4×4 WQFN
  • APPLICATIONS
    • Notebook/Netbook LCD Display Backlighting

The TPS61195 IC provides highly integrated solutions for large-size LCD backlighting. This device has a built-in high efficiency boost regulator with integrated 2.5A/50V power MOSFET. The eight current sink regulators provide high precision current regulation and matching. In total, the device can support up to 96 LEDs. Unused sinks are disabled by tying them to ground. The boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The TPS61195 supports multiple brightness dimming methods. During PWM dimming, each IFB pin’s current is turned on/off at the duty cycle and frequency determined by an integrated pulse width modulation (PWM). The frequency of this signal is resistor programmable, while the duty cycle is controlled directly either from an external PWM signal input to the DPWM pin or through the SMBUS interface. Additionally, the SMBUS interface provides some operational reporting data such as if one or more strings have failed or if the IC is over-heating. In direct PWM dimming mode, each IFB current is turned on/off at same duty cycle and frequency as the PWM signal input on the DPWM pin. In analog dimming mode, the input PWM duty cycle information is translated to analog signal to control the WLED current signal linearly over 1% to 100% brightness area.

The TPS61195 integrates over-current and short-circuit protection, soft start and over temperature protection circuit. The device also provides programmable output over-voltage protection, and the threshold is adjusted by external resistor divider combination.

The TPS61195 IC has built-in linear regulator for the IC supply. The device is in a 4×4 mm QFN package.

The TPS61195 IC provides highly integrated solutions for large-size LCD backlighting. This device has a built-in high efficiency boost regulator with integrated 2.5A/50V power MOSFET. The eight current sink regulators provide high precision current regulation and matching. In total, the device can support up to 96 LEDs. Unused sinks are disabled by tying them to ground. The boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The TPS61195 supports multiple brightness dimming methods. During PWM dimming, each IFB pin’s current is turned on/off at the duty cycle and frequency determined by an integrated pulse width modulation (PWM). The frequency of this signal is resistor programmable, while the duty cycle is controlled directly either from an external PWM signal input to the DPWM pin or through the SMBUS interface. Additionally, the SMBUS interface provides some operational reporting data such as if one or more strings have failed or if the IC is over-heating. In direct PWM dimming mode, each IFB current is turned on/off at same duty cycle and frequency as the PWM signal input on the DPWM pin. In analog dimming mode, the input PWM duty cycle information is translated to analog signal to control the WLED current signal linearly over 1% to 100% brightness area.

The TPS61195 integrates over-current and short-circuit protection, soft start and over temperature protection circuit. The device also provides programmable output over-voltage protection, and the threshold is adjusted by external resistor divider combination.

The TPS61195 IC has built-in linear regulator for the IC supply. The device is in a 4×4 mm QFN package.

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Documentación técnica

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Tipo Título Fecha
* Data sheet WLED Driver for LCD Backlighting With PWM and SMBus Control Interface datasheet (Rev. A) 20 ago 2010
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 ago 2019
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11 dic 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 jun 2018
User guide TPS61195EVM-460 Useer's Guide 14 may 2010

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

TPS61195EVM-460 — Módulo de evaluación TPS61195 para controlador de LED blanco de 96 LED y 8 canales para retroilumina

The TPS61195EVM-460 is a fully assembled and tested circuit for evaluating the TPS61195 Adjustable, 8-Channel White LED Driver IC. If LEDs are not available for connection to the evaluation module, the WLEDEVM-260 board can be ordered.
Guía del usuario: PDF
GUI para el módulo de evaluación (EVM)

TPS61195EVM-SW TPS61195EVM-SW Software Download

The TPS61195EVM software allows you to control the TPS61195EVM via the SMBus interface. This interface allows the user to:

  • Enable/disable the IC and switch between dimming modes,
  • Control the LED current through the ICs current sink, thereby dimming the attached LEDs and
  • Monitor fault conditions.

(...)

Productos y hardware compatibles

Productos y hardware compatibles

Productos
Controladores para LED de retroiluminación
TPS61195 Controlador de LED blanco de 96 LED y 8 canales para retroiluminación LCD con interfaz SMBus
Desarrollo de hardware
Placa de evaluación
TPS61195EVM-460 Módulo de evaluación TPS61195 para controlador de LED blanco de 96 LED y 8 canales para retroilumina
Software
Soporte de software
TPS61195EVM-SW Software de módulo de evaluación TPS61195
Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de 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 (...)
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
WQFN (RUY) 28 Ultra Librarian

Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

Los productos recomendados pueden tener parámetros, módulos de evaluación o diseños de referencia relacionados con este producto de TI.

Soporte y capacitación

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