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Controladores para LED de retroiluminación

TPS61150

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Convertidor elevador doble x2 de 27 V, interruptor de 700 mA y 1.2 MHz con controlador LED blanco de

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TPS61150

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Detalles del producto

Number of channels 2 Vin (min) (V) 3 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 (%) 85 Topology Boost Features Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 2 Vin (min) (V) 3 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 (%) 85 Topology Boost Features Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
VSON (DRC) 10 9 mm² (3 mm × 3 mm)
  • 2.5-V to 6-V Input Voltage Range
  • Two Outputs Each up to 27 V
  • 0.7-A Integrated Switch
  • Built-In Power Diode
  • 1.2-MHz Fixed PWM Frequency
  • Individually Programmable Output Current
  • Input-to-Output Isolation
  • Built-In Soft Start
  • Overvoltage Protection
  • Up to 83% Efficiency
  • Up to 30-kHz PWM Dimming Frequency
  • 2.5-V to 6-V Input Voltage Range
  • Two Outputs Each up to 27 V
  • 0.7-A Integrated Switch
  • Built-In Power Diode
  • 1.2-MHz Fixed PWM Frequency
  • Individually Programmable Output Current
  • Input-to-Output Isolation
  • Built-In Soft Start
  • Overvoltage Protection
  • Up to 83% Efficiency
  • Up to 30-kHz PWM Dimming Frequency

The TPS6115x 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 a 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 SEL pins or an analog voltage on the ISET pins, resulting in PWM dimming of the WLEDs. The boost regulator runs at a 1.2-MHz fixed switching frequency to reduce output ripple and avoid audible noises associated with pulse frequency modulation (PFM) control.

The two current outputs are ideal for driving WLED backlights for the sub and main displays in clamshell 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 WLEDs for one large display.

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

For all available packages, see the orderable addendum at the end of the data sheet.

The TPS6115x 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 a 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 SEL pins or an analog voltage on the ISET pins, resulting in PWM dimming of the WLEDs. The boost regulator runs at a 1.2-MHz fixed switching frequency to reduce output ripple and avoid audible noises associated with pulse frequency modulation (PFM) control.

The two current outputs are ideal for driving WLED backlights for the sub and main displays in clamshell 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 WLEDs for one large display.

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

For all available packages, see the orderable addendum at the end of the data sheet.
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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 TPS6115x Dual-Output Boost WLED Driver Using Single Inductor datasheet (Rev. E) PDF | HTML 30/11/2015
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
Nota sobre la aplicación Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) 29/11/2017
Nota sobre la aplicación Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 15/06/2017
Nota sobre la aplicación Analog PWM Dimming in White-LED Drivers 21/12/2016
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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Placa de evaluación

TPS61150EVM-150 — Módulo de evaluación TPS61150EVM

El TPS61150EVM-150 es una herramienta de evaluación para la familia de TPS6115x. Este es un convertidor elevador de doble canal e inductor único con dos salidas de corriente reguladas para accionar LED blancos. Cada salida de corriente se puede programar individualmente a través de resistencias (...)

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