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背光 LED 驅動器

TPS60255

現行

適用白色 LED 背光的 7 通道高效 175-mA 充電泵

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產品規格表

TPS60255

現行
產品規格表 立即訂購

產品詳細資料

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 x 3
  • 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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類型 標題 日期
* Data sheet HIGH EFFICIENCY CHARGE PUMP FOR 7 WLEDs DRIVER WITH 1 WIRE INTERFACE datasheet 2008年 3月 24日
White paper Common LED Functions and LED Driver Design Considerations 2020年 9月 21日
Application note Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 2018年 12月 11日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 2017年 6月 15日
EVM User's guide TPS60255EVM-262 2008年 3月 3日

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