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Controladores para LED de retroiluminación

TPS61150A

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Controlador WLED impulsor de salida doble con inductor único

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TPS61150A

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Detalles del producto

Number of channels 2 Vin (min) (V) 2.5 Vin (max) (V) 6 Vout (min) (V) 2.5 Vout (max) (V) 27 Type Inductive Switching frequency (max) (kHz) 1200 Duty cycle (max) (%) 93 LED current per channel (mA) 23 Peak efficiency (%) 83 Topology Boost Features Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 2 Vin (min) (V) 2.5 Vin (max) (V) 6 Vout (min) (V) 2.5 Vout (max) (V) 27 Type Inductive Switching frequency (max) (kHz) 1200 Duty cycle (max) (%) 93 LED current per channel (mA) 23 Peak efficiency (%) 83 Topology Boost Features Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
VSON (DRC) 10 9 mm² (3 mm × 3 mm)
  • 2.5V to 6V Input Voltage Range
  • 0.7A Integrated Switch
  • Built-in Power Diode
  • 1.2MHz Fixed PWM Frequency
  • Individually Programmable Output Current
  • Input-to-Output Isolation
  • Built-in Soft Start
  • 27V Overvoltage Protection
  • 3% at 15mA Matching between Two Current Strings, Improvement from TPS61150/1
  • Up to 83% Efficiency
  • Up to 30kHz PWM Dimming Frequency
  • Availiable in a 10 Pin, 3 × 3 mm QFN Package
  • APPLICATIONS
    • Up to 14 WLED Driver for Media Form Factor Display
    • Sub and Main Display Backlight in Clam Shell Phones
    • Display and Keypad Backlight in Portable Equipment
  • 2.5V to 6V Input Voltage Range
  • 0.7A Integrated Switch
  • Built-in Power Diode
  • 1.2MHz Fixed PWM Frequency
  • Individually Programmable Output Current
  • Input-to-Output Isolation
  • Built-in Soft Start
  • 27V Overvoltage Protection
  • 3% at 15mA Matching between Two Current Strings, Improvement from TPS61150/1
  • Up to 83% Efficiency
  • Up to 30kHz PWM Dimming Frequency
  • Availiable in a 10 Pin, 3 × 3 mm QFN Package
  • APPLICATIONS
    • Up to 14 WLED Driver for Media Form Factor Display
    • Sub and Main Display Backlight in Clam Shell Phones
    • Display and Keypad Backlight in Portable Equipment

The TPS61150A is a high frequency boost converter with two regulated current outputs for driving WLEDs. Each current output can be individually programmed through external resistors. There is dedicated selection pin for each output, so the two outputs can be turned on separately or simultaneously. The output current can be reduced by a pulse width modulation (PWM) signal on the select pins or an analog voltage on the ISET pin. The boost regulator runs at 1.2MHz fixed switching frequency to reduce output ripple and avoid audible noises associated with PFM control.

The two current outputs are ideal for driving WLED backlight for the sub and main displays in clam shell phones. The two outputs can also be used for driving display and keypad backlights. When used together, the two outputs can drive up to 14 WLED for one large display.

In addition to the small inductor, small capacitor and 3mm x 3mm QFN package, the built-in MOSFET and diode eliminate the need for any external power devices. Overall, the IC provides an extremely compact solution with high efficiency and plenty of flexibility.

The TPS61150A is a high frequency boost converter with two regulated current outputs for driving WLEDs. Each current output can be individually programmed through external resistors. There is dedicated selection pin for each output, so the two outputs can be turned on separately or simultaneously. The output current can be reduced by a pulse width modulation (PWM) signal on the select pins or an analog voltage on the ISET pin. The boost regulator runs at 1.2MHz fixed switching frequency to reduce output ripple and avoid audible noises associated with PFM control.

The two current outputs are ideal for driving WLED backlight for the sub and main displays in clam shell phones. The two outputs can also be used for driving display and keypad backlights. When used together, the two outputs can drive up to 14 WLED for one large display.

In addition to the small inductor, small capacitor and 3mm x 3mm QFN package, the built-in MOSFET and diode eliminate the need for any external power devices. Overall, the IC provides an extremely compact solution with high efficiency and plenty of flexibility.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos Dual Output Boost WLED Driver Using Single Inductor datasheet 6/10/2006
Informe Common LED Functions and LED Driver Design Considerations 21/09/2020
Nota sobre la aplicación Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 11/12/2018
Guía de selección Power Management Guide 2018 (Rev. R) 25/06/2018
Nota sobre la aplicación Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 15/06/2017
Analog Design Journal IQ: What it is, what it isn’t, and how to use it 17/06/2011
Nota sobre la aplicación Minimizing Ringing at the Switch Node of a Boost Converter 15/09/2006

Diseño y desarrollo

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