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RT7758M 系列是一款可于连续导通模式（CCM, Continuous Conduction Mode）或准谐振模式（QR Mode, Quasi-Resonant Mode）下运作的控制器，专为搭配 RT7216KNE 等控制器而设计，可提供完整的 USB Power Delivery（USB PD）或可程式化电源供应器（Programmable Power Adapter）解决方案。RT7758M 不仅具备高效率电源控制架构，亦可在 5V 待机条件下将待机功耗降低至 50mW，以满足低待机功耗设计需求。 RT7758M 采用多项创新技术以支援宽范围输出电压应用。透过 DMAG 脚位感测输出电压，可调整控制回路增益以维持系统稳定性，同时调整输出过压保护（OVP）门槛值以保护外部设备，并调整电流限制以符合限制功率来源（LPS, Limited Power Source）安全规范要求。 此外，RT7758M 内建完整保护功能，包括大电容输入欠压启动/关机保护（Bulk-Capacitor Brown-In/Brown-Out Protection）、VDD 过压保护（VDD OVP）、输出过压/欠压保护（Output OVP/UVP）、次级整流器短路保护（SRSP, Secondary Rectifier Short-Circuit Protection）以及外部过温保护（External OTP），以提升系统安全性与可靠性。 在定功率输出应用中，可透过于 CS 脚位外接电阻，实现全输入电压范围内的精准线路补偿（Line Compensation）。RT7758M 亦提供多项保护机制，以避免 RT7216KNE 或分流稳压器等次级侧元件发生故障时对系统造成影响。 实际应用上，建议 RT7758M 搭配 RT7216KNE 次级控制器使用，以实现稳健且安全的电源设计，并有效避免因不同装置、线材、插头或插座错误连接所导致的潜在故障状况。 建议接面温度范围为 -40°C 至 125°C，环境温度范围为 -40°C 至 85°C。
RT7758M 电路图
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<div class="spec-list"><ul class="lv1"><li>Optimized for Adaptive Output Power - Wide VDD Range: 9V to 64V - Adaptive Loop Gain Control for Loop Stability </li><li>High Efficiency - Green Mode Operation at Light Load and No Load </li><li>Comprehensive Protection Features - Bulk-Capacitor Brown-In and Brown-Out Protection - VDD Overvoltage Protection - Output Overvoltage and Undervoltage Protection - External Over-Temperature Protection - Secondary Rectifier Short-Circuit Protection - Programmable Line Compensation </li><li>Others - <50mW in 5V Standby Mode for Power Saving - Driver Capability: 250mA/−400mA - SmartJitter Technology </li></ul></div>
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RT7758M 订购信息
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<div class="spec-list"><ul class="lv1"><li>USB PD and Programmable Power Adapters </li></ul></div>
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