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The RT9367C is an integrated solution for backlighting and phone camera input supply. The part contains a charge pump white LED driver and dual low dropout linear regulators. This IC can be shutdown by pulling ENA low.
In the section of charge pump, The RT9367C can power up 4 white LEDs with regulated constant current for uniform intensity. Each channel (LED1-LED4) can support up to 25mA. The part maintains highest efficiency by utilizing a x1/x1.5/x2 fractional charge pump and low dropout current regulators. An internal 5-bit DAC is used for brightness control. Users can easily configure up to 32-step of LED current by I2C interface.
In the section of linear regulator, The RT9367C comprises a dual channel, low noise, and low dropout regulator sourcing up to 300mA at each channel. The range of output voltage can be configured from 1.1V to 3.3V by I2C interface. The outputs of LDO offer 3% accuracy and low dropout voltage of 250mV @300mA. The LDO also provides current limiting and output short circuit thermal folded back protection.
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  • 手机背光和摄像头电源供应的集成化方案
  • I2C 接口可程序设计的32级调光控制能力和独立通道开/关能力
  • 过热保护
  • 资料寄存器在加电期间复位
  • 关机期间电流消耗仅 1μA ，接口处于开放状态
  • 电荷泵 LED 驱动器
  • 全锂离子电池电压范围内的峰值效率可达93%
  • 全锂离子电池电压范围内的平均效率可达85%
  • 可驱动多达4只白光 LED
  • 各通道可输出 25mA 电流，总电流达 100mA
  • 60mV 恒流源压差
  • 1%的电流精度
  • 0.7%的电流一致性
  • 电荷泵工作模式在 x1/x1.5/x2 之间自动转换
  • 低输入端噪声和 EMI 问题
  • 5.5V 过压保护
  • 开机、模式转换冲击保护
  • 1MHz 随机频率振荡器
  • 0.1μA 低停机电流
  • 双路低压差稳压器
  • 宽工作电压范围
  • 低输出噪声
  • 无需使用噪声旁路电容
  • 线路/负载瞬变时的快速响应能力
  • 温度系数低
  • 两路输出能力均为 300mA
  • 输出电压精度：3%
  • 过流保护
  • 短路热折回保护
  • 0.1μA 低停机电流
  • 符合 RoHS 规范，不含卤素
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Camera Phone, Smart Phone White LED Backlighting, CMOS Sensor Input Supply
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