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TPS61181

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適用于筆記本電腦、具有內置 LDO 的 1.5A 白光 LED 驅動器

產品詳情

Number of channels 6 Vin (min) (V) 5 Vin (max) (V) 24 Vout (min) (V) 5 Vout (max) (V) 39 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 25 Peak efficiency (%) 90 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 6 Vin (min) (V) 5 Vin (max) (V) 24 Vout (min) (V) 5 Vout (max) (V) 39 Type Inductive Switching frequency (max) (kHz) 1000 Duty cycle (max) (%) 94 LED current per channel (mA) 25 Peak efficiency (%) 90 Topology Boost Features Load Disconnect During Shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
WQFN (RTE) 16 9 mm2 3 x 3
  • 5 V to 24 V Input Voltage
  • Integrated 1.5 A 40 V MOSFET
  • 1.0 MHz/1.3 MHz Switching Frequency
  • Boost Output Auto-Adaptive to WLED Voltages
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sink of 25 mA
  • Up to 10 WLED in Series
  • Less Than 3% Current Matching and Accuracy
  • Up to 1000:1 PWM Brightness DImming Range
  • Minimized Output Ripple Under PWM Dimming
  • Driver for Input/Output Isolation PFET
  • True Shutdown
  • Over Voltage Protection
  • WLED Open/Short Protection
  • Built-in Soft Start
  • 16L 3 mm×3 mm QFN
  • 5 V to 24 V Input Voltage
  • Integrated 1.5 A 40 V MOSFET
  • 1.0 MHz/1.3 MHz Switching Frequency
  • Boost Output Auto-Adaptive to WLED Voltages
  • Small External Components
  • Integrated Loop Compensation
  • Six Current Sink of 25 mA
  • Up to 10 WLED in Series
  • Less Than 3% Current Matching and Accuracy
  • Up to 1000:1 PWM Brightness DImming Range
  • Minimized Output Ripple Under PWM Dimming
  • Driver for Input/Output Isolation PFET
  • True Shutdown
  • Over Voltage Protection
  • WLED Open/Short Protection
  • Built-in Soft Start
  • 16L 3 mm×3 mm QFN

The TPS61180/1/2 ICs provide highly integrated solutions for media size LCD backlight. These devices have a built-in high efficiency boost regulator with integrated 1.5A/40V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLED. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The devices support pulse width modulation (PWM) brightness dimming. During dimming, the WLED current is turned on/off at the duty cycle and frequency determined by the PWM signal input on the DCRTL pin. One potential issue of PWM dimming is audible noises from the output ceramic capacitors. The TPS61180/1/2 family is designed to minimize this output AC ripple across a wide dimming duty cycle and frequency range; therefore, reducing the audible noise.

The TPS61180/1/2 ICs provide a driver output for an external PFET connected between the input and inductor. During short circuit or over-current conditions, the ICs turn off the external PFET and disconnect the battery from the WLEDs. The PFET is also turned off during IC shutdown (true shutdown) to prevent any leakage current of the battery. The device also integrates over-voltage protection, soft-start and thermal shutdown.

The TPS61180 IC requires external 3.3V IC supply, while TPS61181 and TPS61182 ICs have a built-in linear regulator for the IC supply. All the devices are in a 3×3 mm QFN package.

The TPS61180/1/2 ICs provide highly integrated solutions for media size LCD backlight. These devices have a built-in high efficiency boost regulator with integrated 1.5A/40V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLED. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to improve efficiency.

The devices support pulse width modulation (PWM) brightness dimming. During dimming, the WLED current is turned on/off at the duty cycle and frequency determined by the PWM signal input on the DCRTL pin. One potential issue of PWM dimming is audible noises from the output ceramic capacitors. The TPS61180/1/2 family is designed to minimize this output AC ripple across a wide dimming duty cycle and frequency range; therefore, reducing the audible noise.

The TPS61180/1/2 ICs provide a driver output for an external PFET connected between the input and inductor. During short circuit or over-current conditions, the ICs turn off the external PFET and disconnect the battery from the WLEDs. The PFET is also turned off during IC shutdown (true shutdown) to prevent any leakage current of the battery. The device also integrates over-voltage protection, soft-start and thermal shutdown.

The TPS61180 IC requires external 3.3V IC supply, while TPS61181 and TPS61182 ICs have a built-in linear regulator for the IC supply. All the devices are in a 3×3 mm QFN package.
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類型 標題 下載最新的英語版本 日期
* 數(shù)據(jù)表 WLED DRIVER FOR NOTEBOOK DISPLAY. 數(shù)據(jù)表 (Rev. E) 2013年 4月 11日
白皮書 常見 LED 功能和 LED 驅動器設計注意事項 英語版 2020年 9月 21日
應用手冊 Some Guidelines and Tips for the LED Driver Application 2019年 8月 14日
應用手冊 Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 2018年 12月 11日
應用手冊 Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) 2017年 11月 29日
應用手冊 Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 2017年 6月 15日
應用手冊 Analog Dimming with the TPS61181 2011年 11月 8日
EVM 用戶指南 TPS61181EVM-259 / TPS61182EVM-259 (Rev. B) 2011年 5月 12日
應用手冊 TPS61181 One-Cell Battery Application for Tablet PC Backlight 2010年 9月 9日
應用手冊 優(yōu)化具有內部補償功能的 DC-DC 轉換器的瞬態(tài)響應 最新英語版本 (Rev.B) 2008年 7月 15日

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用戶指南: PDF
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TPS61181EVM-259 — TPS61181EVM-259 評估模塊

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用戶指南: PDF
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WLEDEVM-260 — WLEDEVM-260 評估模塊

The WLEDEVM-260 load board contains 8 white light emitting diode (WLED) banks/strings which contain either 10 or 12 WLEDs as selected by the odd numbered jumpers (JP1, JP3, etc.). It is used with the TPS61181EVM-259 or TPS61182EVM-259 Evaluation Module to demonstrate functionality of the (...)

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WQFN (RTE) 16 Ultra Librarian

訂購和質量

包含信息：
  • RoHS
  • REACH
  • 器件標識
  • 引腳鍍層/焊球材料
  • MSL 等級/回流焊峰值溫度
  • MTBF/時基故障估算
  • 材料成分
  • 鑒定摘要
  • 持續(xù)可靠性監(jiān)測
包含信息：
  • 制造廠地點
  • 封裝廠地點

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