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RT2910 是一款集成高压(HV)开关驱动器的 PWM 反相转换器。高压开关驱动器可保护负载免受高电压瞬态冲击,并在发生过压事件时,通过控制外部 N 沟道 MOSFET 的栅极(Gate)来调节输出电压,将输出限制在安全范围内,使负载能够持续正常工作。 RT2910 同时监测 VHV 与 SNS 引脚之间的压降,以提供过电流故障保护。内置放大器会将电流检测电压限制在 50mV。若故障状态持续存在,外部 MOSFET 将被关闭;经过一段冷却时间后,栅极驱动信号会重新启用,使 MOSFET 再次导通。此外,高压开关驱动器还支持背靠背 MOSFET(Back-to-Back FET)结构,以防止输出端产生反向漏电流。 高效率 PWM 反相转换器可帮助设计人员实现低噪声、小尺寸的负电压 DC-DC 电源方案。RT2910 可在 +4V 至 +7V 的输入电压范围内工作,并产生 -0.5V 至 -12.5V 的负输出电压。 为了降低开关噪声,RT2910 采用电流模式固定频率 PWM 控制架构。开关频率可通过外接电阻设置在 300kHz 至 800kHz 范围内。
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<div class="spec-list"><ul class="lv1"><li>HV Switch Driver <ul class="lv2"> <li></li><li>Adjustable Output Clamp Voltage </li><li>Over-Current Protection </li><li>Wide Operation Range : 5V to 60V </li><li>Reverse Input Protection to −60V </li><li>Adjustable Fault Timer </li><li>Support N-MOSFET </li></ul> </li><li>Inverting PWM Converter <ul class="lv2"> <li></li><li>-12.5V to -0.5V Output </li><li>Integrate High-Side P-MOSFET </li><li>300kHz to 800kHz Switching Frequency </li><li>Current-Mode PWM Control </li><li>Internal Soft-Start </li><li>Power Ok Indicator </li></ul> </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Ga-N MOSFET Bias </li><li>Positive to Negative Conversion </li><li>Industrial and Telecom Power Supplies </li><li>Distributed Power System </li></ul></div>
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