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RT4722C

AMOLED用3路DC-DC转换器

RT4722C
New

RT4722C是整合了三个DC-DC转换器的AMOLED用电源IC，含有2组升压电路和一组反相电路，分别为AMOLED显示器提供其需要的正负电压。
于便携式应用而言，板面空间和效率总是处于关注的焦点上，高频工作的RT4722C容许使用低感量的电感器以实现板面空间的节约。它的负压输出和AVDD输出电压是可由MCU通过单线 (SWIRE引脚) 通讯来进行程控的，输出负压的范围为-1.4V至-5.4V，AVDD输出电压的范围是5.8V至7.9V。它还具有OTP、SCP、UVLO和过流保护功能，使用了WQFN-16L 3x3封装。

应用

  • AMOLED面板
  • PDA和智能型手机
  • 可携式设备

主要规格

RT4722C
Status Last Time Buy
Vin (min) (V) 2.9
Vin (max) (V) 4.5
Number of Channels 3
Number of Buck Converters 0
Number of Boost Converters 2
Number of Negative Outputs 1
Number of LED Drivers 0
Number of LDO Regulators 0
Application OLED for Mobile
Features Current Mode Control;Cycle-by-Cycle Current Limit;Fast Transient Response;Internal Compensation;OCP;SCP
Package Type WQFN3x3-16

关键特性

  • Boost转换器输出AVDD正压的电压范围是5.8V至7.9V

  • Boost转换器提供给AMOLED的电源电压是4.6V

  • 反相转换器提供给AMOLED的负压范围是-1.4V至-5.4V

  • 供给AMOLED的正负压都具有高达300mA的负载能力

  • AVDD输出的负载能力可达55mA

  • 典型效率峰值：90% (40mA至150mA)

  • PWM模式的工作频率为1.5MHz

  • 输出电压精准度高

  • 极佳的线路、负载瞬变响应特性

  • 极佳的线路、负载调节性能

  • 通过SWIRE引脚即可对负压和AVDD输出电压进行程控

  • 有快速输出端放电功能

  • 关机模式下的电流消耗小于1μA

  • 有内部软起动限制浪涌电流

  • 过热保护 (OTP)

  • 过流保护 (OCP)

  • 短路保护 (SCP)

Application Notes

Datasheet

DS4722C-00.pdf

Datasheet

DS4722C-00.pdf

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