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RT8509A 是用于为 TFT-LCD 供电的高性能 Boost 架构 DC/DC 转换器，采用电流模式控制架构、工作频率固定的 PWM 控制电路，集成了功率开关，具有高转换效率和快速的瞬态响应特性。其输入电压范围为 2.4V~14V，输出电压可用电阻分压器进行设定，最高可达 24V。其最高峰值电流限制为 4.5A（最小值），还具有可调节的软启动、过压保护和过热保护等特性。其封装为 WDFN-12L 5x5。
/content/dam/richtek-eds/resources/product-specifications/rt85/rt8509a/images/circuit/68484phvhu.GIF
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<li class="mv5"> 效率可达 90%</li><li class="mv5"> 输出电压可调，最高可达 24V</li><li class="mv5"> 输入电压范围：2.8V~14V</li><li class="mv5"> 输入电压欠压闭锁</li><li class="mv5"> 1.2MHz 固定工作频率</li><li class="mv5"> 可调软启动</li><li class="mv5"> 输出过压保护</li><li class="mv5"> 过热保护</li><li class="mv5"> WDFN 封装</li><li class="mv5"> 符合 RoHS 规范，不含卤素</li>
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<li class="mv5"> GIP TFT-LCD 屏</li>
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