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Product Spec Banner
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RT8848C 是一款 8/7/6/5/4/3/2/1 多相同步降压控制器，针对高效能绘图微处理器进行最佳化，并透过 PWM-VID 介面支援 nVidia OVR4i+ 规范。RT8848C 采用 AC G-NAVP<sup>TM</sup> (Green Native AVP)，这是立锜专有的拓扑，由内部 GM 放大器的有限 DC 增益搭配电流模式控制所衍生。透过采用 AC G-NAVP<sup>TM</sup> 拓扑，RT8848C 的工作频率会随 VID、负载与输入电压而变化，即使在 CCM 下亦可进一步提升效率。此外，对于电流感测应用，RT8848C 可支援来自电感的传统 DCR 网路电流感测，或可直接提供电流监测讯号 (IMON) 的智慧功率级 (SPS)。<br /><br />RT8848C 具备外部参考输入与 PWM-VID 动态输出电压控制，其中输出电压会被调节并追踪外部输入参考电压。RT8848C 可透过 PINSETx 脚位设定内部 RAMP 振幅，以最佳化稳定性与负载暂态效能。RT8848C 亦提供完整的故障保护功能，包括过压保护 (OVP)、欠压保护 (UVP)、通道过电流限制 (CH_OC)、总输出电流保护 (SOC) 与过温保护 (OTP)。建议接面温度为 −40°C 至 125°C。
RT8848C 电路图
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<div class="spec-list"><ul class="lv1"><li>Multi-Phase PWM Controller </li><li>PWM-VID Dynamic Voltage Control </li><li>Support 1.8V PWM-VID Interface </li><li>Power State Indicator <ul class="lv2"> <li></li><li>LPC (Low Phase Count), PSI = Low </li><li>APS (Auto Phase Shedding), PSI = Mid </li><li>HPC (High Phase Count), PSI = High </li></ul> </li><li>External Reference Input Control </li><li>8/7/6/5/4/3/2/1 Phase Hardware Setting </li><li>Adjustable Soft-Start Time </li><li>Adjustable Switching Frequency </li><li>Adjustable Phase Current Balance </li><li>Support Standby Mode </li><li>UVP/OVP/OTP/SOC/CH_OC/TSEN Protection </li><li>Adjustable Protection Thresholds </li><li>Power Good Indicator </li><li>ADC Reporting for IMON, TSEN and VSEN </li><li>Support I<sup>2</sup>C Interface for Programming </li><li>RoHS Compliant and Halogen Free </li></ul></div>
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RT8848C 订购信息
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RT8848C
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<div class="spec-list"><ul class="lv1"><li>GPU Core Power for OVR4i+ Spec </li></ul></div>
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