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The RT4531 is a dual-channel current source with high-efficiency asynchronous boost converter for backlight application. The RT4531 has built-in 1.5A/36V power MOSFET and two high current-matching capability current sink, so RT4531 can drives up 10s2p white LED. The RT4531 can allow very low voltage headroom control, therefore to improve LED strings efficiency effectively. <p align="justify">The RT4531 supports both PWM dimming and 1-wire digital dimming interface and it can realize 10 bit brightness code programming. </p><p align="justify">The RT4531 provides complete protection functions such as input Under-Voltage Lockout (UVLO), Over-Current Protection (OCP), Output Over Voltage (OVP) and Over-Temperature Protection (OTP). </p><p align="justify">The RT4531 is available in the WL-CSP-9B 1.35x1.35 (BSC) package.</p>
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  • 输入电压范围:2.5V~5.5V
  • 内置软启动,UVLO, OTP, OCP, OVP
  • 关机电流典型值:<1μA
  • 1MHz开关频率
  • 可驱动最多2串共10颗WLED
  • 独立PWM调光及单线数字调光控制
  • 高达10位调光分辨率
  • LED电流精准度±2% (IFBx = 20mA)
  • LED电流一致性±2% (IFBx = 20mA)
  • 内置IFB1/IFB2引脚过压保护、短路保护及使用检测
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智能型手机 可携式仪器 小型媒体形式背光 单节电池供电输入的LCD屏幕
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