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TPS61181

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适用于笔记本电脑、具有内置 LDO 的 1.5A 白光 LED 驱动器

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TPS61181

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产品详情

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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类型 标题 下载最新的英语版本 日期
* 数据表 WLED DRIVER FOR NOTEBOOK DISPLAY. 数据表 (Rev. E) 2013年 4月 11日
白皮书 常见 LED 功能和 LED 驱动器设计注意事项 英语版 2020年 9月 21日
应用手册 Some Guidelines and Tips for the LED Driver Application 2019年 8月 14日
应用手册 Performing Accurate PFM Mode Efficiency Measurements (Rev. A) 2018年 12月 11日
应用手册 Optimizing Transient Response of Internally Compensated DC-DC Converters (Rev. B) 2017年 11月 29日
应用手册 Extending the Soft Start Time Without a Soft Start Pin (Rev. B) 2017年 6月 15日
应用手册 Analog Dimming with the TPS61181 2011年 11月 8日
EVM 用户指南 TPS61181EVM-259 / TPS61182EVM-259 (Rev. B) 2011年 5月 12日
应用手册 TPS61181 One-Cell Battery Application for Tablet PC Backlight 2010年 9月 9日
应用手册 优化具有内部补偿功能的 DC-DC 转换器的瞬态响应 最新英语版本 (Rev.B) 2008年 7月 15日

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用户指南: PDF
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用户指南: PDF
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评估板

TPS61181EVM-259 — TPS61181EVM-259 评估模块

The TPS61181EVM-259 facilitates evaluation of the TPS61181 1.5 A White LED Driver for Notebooks. This IC provides a highly integrated solution for media size LCD backlight. The device has a built-in high efficiency boost regulator with integrated 1.5 A/40 V power MOSFET.

用户指南: PDF
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评估板

WLEDEVM-260 — WLEDEVM-260 评估模块

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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订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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