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R7731是高性能、低成本、低启动电流、电流模式脉宽调制控制器,具有突发三重模式,以便支持绿色节能运行模式。R7731集软启动、欠压锁定(UVLO)、内部前缘遮蔽 (LEB)、过热保护(OTP)以及内部斜率补偿功能于一体,为用户提供高效、低外部组件数量和低成本的AC/DC电源应用解决方案。为保护外部功率MOSFET不因电源过电压而受到损坏,R7731输出驱动器的电压被限定在12V。R7731的另一个特点是具备多项保护功能,如超载保护(OLP)和过压保护(OVP),省略了外部保护电路,确保稳定、可靠地运行。R7731可提供SOT-23-6和DIP-8封装形式。
超低启动电流(<30μmA)
10/14V 欠压锁定
软启动功能
电流模式控制
切换频率抖动
内部前缘遮蔽
内置斜率补偿
突发三重模式脉宽调制支持绿色节能模式
逐周期电流限制
反馈回路开路保护
输出过电压保护
过热保护
超载保护
采用软驱动以降低电磁干扰
高噪声抑制能力
光耦合器短路保护
通过RoHS认证,且不含卤素
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