MK9218是一颗6-100V超宽输入电压的同步降压转换器,输出电压范围为0.8-60V.通过搭配合适的MOS管和电感,可提供高达30A的输出电流。QFN-20,100V高电压输入30A外置MOS大电流同步降压DC-DC控制器.
MK9218是一颗6-100V超宽输入电压的同步降压转换器,输出电压范围为0.8-60V.通过搭配合适的MOS管和电感,可提供高达30A的输出电流。MK9218采用电压控制模式,具有优秀的输出电压精度。开关频率100KHz到1MHz可调,可通过外部时钟输入同步避免对噪声敏感应用的影响。
MK9218支持强制PWM模式和二极管仿真模式,强制PWM模式可消除开关频率变化,以降低EMI。用户可选择的二极管仿真模式可用于轻载时降低功耗。在合适的开关频率下,MK9218的占空比在1%-99%之间可调,可以简单的选择输入和输出电压,MK9218还具有电源好信号输出,指示输出电压正常,可进行时序控制和系统送电控制。
MK9218支持同步信号输出和同步信号输入,可使用两颗芯片进行双相降压设计,满足大电流输出需要,输入支持欠压保护,芯片支持供电欠压保护,支持过电流保护和过热保护,采用增强散热的QFN20L封装,尺寸为4.5*3.5mm。
特性
6V-100V的宽输入电压范围
输出电压可调,从0.8V到60V
45ns吨(分钟),用于低占空比
145ns Toff(最小值),用于高占空比
精度±1%反馈参考
从100kHz到1MHz可调FSW
可配置二极管仿真或FPWM
2.5A源和3.5A汇驱动器功能
预偏置启动
SYNCI和SYNCO功能
Open Drain电源良好指示灯
可调输出电压软启动
带滞后的输入UVLO
VCC UVLO保护
带打嗝模式的OC、OT保护
3.5x4.5 QFN-20封装,带隔热垫
应用:高功率密度直流电压转换、数据和电信应用、非隔离PoE和网络摄像头、USB PD3.1充电器以及相关的降压应用场合
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