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RT4731

3输出AMOLED偏置电源

RT4731
New

RT4731是将一个Boost转换器、两个线性稳压器（分别提供AVDD和VOP输出）及生成正压和负压输出的电荷泵集成于一体的AMOLED偏置电源IC，其负压输出可用SWIRE接口协议以100mV为级差在-0.6V~-2.4V间进行调节。它通过使用可自动进行模式转换的-0.33x/-0.5x分压电荷泵实现转换效率的最大化，具有2.9V~4.8V的输入电压范围，负载能力高达30mA，是单节锂离子电池供电条件下的理想选择。其封装形式为UBGA-21B 1.82x3.23。

应用

  • 便携式产品AMOLED显示屏
  • 物联网设备

主要规格

RT4731
Status EOL
Vin (min) (V) 2.9
Vin (max) (V) 4.8
Number of Channels 3
Number of Buck Converters 0
Number of Boost Converters 1
Number of Negative Outputs 1
Number of LED Drivers 0
Number of LDO Regulators 1
Application OLED for Watch
Features Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Internal Compensation;OCP;SCP;UVP
Package Type UBGA1.82x3.23-21

关键特性

  • 输入电压范围：2.9V~4.8V

  • 使用单线通讯协议

  • 固定4.6V正电压输出

  • 2.8V AVDD电压输出

  • 负压输出SWIRE可调，范围：-0.6V~-2.4V；级差0.1V

  • 自动进行模式切换的-0.33x/-0.5x电荷泵

  • 内建软启动

  • 最大负载能力：30mA

  • 可程控输出快速放电功能

  • 关机时输出端为高阻状态

  • UVLO/OCP/SCP/OTP

  • 关机电流 < 1μA

  • 21球UBGA封装

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