TI哪些型号被关注? TI热门产品型号
  • 制造厂商:TI
  • 产品类别:电源管理
  • 技术类目:LED 驱动器 - 背光 LED 驱动器
  • 功能描述:适用于中型 LCD 背光的 SMBus/I2C 控制型 WLED 驱动器
  • 点击这里打开及下载LP8543的技术文档资料
  • TI代理渠道,提供当日发货、严格的质量标准,满足您的目标价格

The LP8543 is a white LED driver with integrated boost converter. It has 7 adjustable current sinks which can be controlled by SMBus or I2C-compatible serial interface, PWM input and Ambient Light Sensor (ALS).

The boost converter has adaptive output voltage control based on the LED driver voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions. Phase Shift PWM dimming offers further power saving especially when there is poor matching in the forward voltages of the LED strings. Boost voltage can also be controlled through the SMBus/I2C.

Internal EEPROM stores the data for backlight brightness and ambient light sensor calibration. Brightness can be calibrated during the backlight unit production so that all units produce the same brightness. EEPROM also stores the coefficients for the LED control equations and the default LED current value. LED current has 8–bit adjustment from 0 to 60 mA.

The LP8543 has several safety and diagnostic features. Low-input voltage detection turns the chip off if the system gets stuck and battery fully discharges. Input voltage detection threshold is adjustable for different battery configurations. Thermal regulation reduces backlight brightness above a set temperature. LED fault detection reports open or LED short fault. Boost over-current fault detection protects the chip in case of over-current event.

LP8543 is available in the WQFN 24-pin package.

  • High-Voltage DC/DC Boost Converter with Integrated FET
  • 5.5V to 22V Input Voltage Range to Support 2x, 3x and 4x Li-Ion Batteries.
  • PWM Phase Shift Control with Adaptive Boost Output to Increase Efficiency Compared to Conventional Boost Converters Topologies
  • PWM Brightness Control for Single Wire Control and Stand-Alone Use
  • Digital Ambient Light Sensor Interface with User-Programmed Ambient Light to Backlight Brightness Curve
  • Easy-to-Use EEPROM Calibration for Current, Intensity and Ambient Light Response Setting
  • Seven LED Drivers with LED Fault (Short/open) Detection
  • Eight-Bit LED Current Control
  • Internal Thermal Protection and Backlight Safety Dimming Feature
  • Two Wire, SMBus/ I2C-Compatible Control Interface
  • Low-Input Voltage Detection and Shutdown
  • Minimum Number of External Components
  • WQFN 24-Pin Package, 4 x 4 x 0.8 mm

All trademarks are the property of their respective owners.

  • Number of channels (#)
  • 7
  • Vin (Min) (V)
  • 5.5
  • Vin (Max) (V)
  • 22
  • Vout (Min) (V)
  • 10
  • Vout (Max) (V)
  • 40
  • Type
  • Inductive
  • Switching frequency (Max) (kHz)
  • 1250
  • LED current per channel (mA)
  • 60
  • Peak efficiency (%)
  • 91
  • Topology
  • Boost, Current Sink
  • Features
  • Enable/Shutdown, I2C Control, PWM Control
  • Operating temperature range (C)
  • -30 to 85


LP8543SQ/NOPB,工作温度:PropertyValue,封装:WQFN (RTW)-24,包装数量MPQ:1000个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LP8543SQ/NOPB的批量USD价格:1.098(1000+)

LP8543SQE/NOPB,工作温度:-30 to 85,封装:WQFN (RTW)-24,包装数量MPQ:250个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LP8543SQE/NOPB的批量USD价格:1.098(1000+)

LP8543SQX/NOPB,工作温度:-30 to 85,封装:WQFN (RTW)-24,包装数量MPQ:4500个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:SN,TI官网LP8543SQX/NOPB的批量USD价格:.915(1000+)


PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助?PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。

在?PSpice for TI 设计和仿真工具中,您可以搜索 TI (...)
TI代理|TI中国代理 - 国内领先的TI芯片采购平台