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Controladores para LED de retroiluminación

TPS60255

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Bomba de carga de alta eficiencia de 175 mA y 7 canales para retroiluminación LED blanca

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TPS60255

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Detalles del producto

Number of channels 7 Vin (min) (V) 2.7 Vin (max) (V) 6 Vout (min) (V) 2.7 Vout (max) (V) 6.5 Type Capacitive Switching frequency (max) (kHz) 875 Duty cycle (max) (%) 100 LED current per channel (mA) 25 Peak efficiency (%) 93 Topology Boost Features Analog Dimming, EasyScale 1-Wire Interface, Enable/Shutdown, Fault Detection, Integrated Switch, Load Disconnect During Shutdown, OVP, Soft Start, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 7 Vin (min) (V) 2.7 Vin (max) (V) 6 Vout (min) (V) 2.7 Vout (max) (V) 6.5 Type Capacitive Switching frequency (max) (kHz) 875 Duty cycle (max) (%) 100 LED current per channel (mA) 25 Peak efficiency (%) 93 Topology Boost Features Analog Dimming, EasyScale 1-Wire Interface, Enable/Shutdown, Fault Detection, Integrated Switch, Load Disconnect During Shutdown, OVP, Soft Start, Synchronous Rectification Operating temperature range (°C) -40 to 85 Rating Catalog
WQFN (RTE) 16 9 mm² (3 mm × 3 mm)
  • 2.7 V to 6.0 V Input Voltage Range
  • 1× and 1.5× Charge Pump
  • Auto Switching Between 1× and 1.5× Modes
  • 750 kHz Charge Pump Frequency
  • Seven Individually-regulated WLED Current Sinks
  • Single- Wire Interface for Dimming and ON/OFF Control
  • 25 mA max LED Current for Six Current Sinks
  • One 80 mA Current Sink
  • Open WLED Detection
  • Built-in Soft Start and Current Limit
  • 16-pin, 3 mm × 3 mm QFN Package
  • APPLICATIONS
    • Cellular Phones
    • Portable Navigation Displays
    • Multi-display Handheld Devices
  • 2.7 V to 6.0 V Input Voltage Range
  • 1× and 1.5× Charge Pump
  • Auto Switching Between 1× and 1.5× Modes
  • 750 kHz Charge Pump Frequency
  • Seven Individually-regulated WLED Current Sinks
  • Single- Wire Interface for Dimming and ON/OFF Control
  • 25 mA max LED Current for Six Current Sinks
  • One 80 mA Current Sink
  • Open WLED Detection
  • Built-in Soft Start and Current Limit
  • 16-pin, 3 mm × 3 mm QFN Package
  • APPLICATIONS
    • Cellular Phones
    • Portable Navigation Displays
    • Multi-display Handheld Devices

The TPS60255 is a high-efficiency, constant frequency charge pump DC/DC converter that uses 1× and 1.5× conversion to maximize efficiency for the input voltage range. By using adaptive 1×/1.5× charge-pump modes and very low dropout current regulators, the TPS60255 achieves high efficiency for the entire one-cell lithium battery range. The protection features include soft start, over-current limit, thermal shut down, and over-voltage detection. The device automatically detects and removes unused current sinks from the control loop.

This device drives six 25 mA current sinks and one 80 mA current sink. These current regulators are programmed by three independent brightness registers and five ON/OFF bits using a single-wire interface (EasyScale™). This offers flexible applications for a variety of lighting control in portable devices.

The TPS60255 is a high-efficiency, constant frequency charge pump DC/DC converter that uses 1× and 1.5× conversion to maximize efficiency for the input voltage range. By using adaptive 1×/1.5× charge-pump modes and very low dropout current regulators, the TPS60255 achieves high efficiency for the entire one-cell lithium battery range. The protection features include soft start, over-current limit, thermal shut down, and over-voltage detection. The device automatically detects and removes unused current sinks from the control loop.

This device drives six 25 mA current sinks and one 80 mA current sink. These current regulators are programmed by three independent brightness registers and five ON/OFF bits using a single-wire interface (EasyScale™). This offers flexible applications for a variety of lighting control in portable devices.
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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 HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs DRIVER WITH 1 WIRE INTERFACE datasheet 24/03/2008
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

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.

Soporte de software

TPS60255EVM-SW — Software de EVM TPS60255

The TPS60255 EVM Software provides a software interface for the TPS60255 EVM boards. Use this software to change the TPS60255 IC registers via the USB Interface Adapter.

Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
WQFN (RTE) 16 Ultra Librarian
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