[原创] Linear LTC3897PolyPhase同步升压转换器解决方案

Linear公司的LTC3897是带输入/输出保护的PolyPhase™同步升压转换器,能驱动两个N沟功率MOSFET级,输入电压4.5V-65V(高达75V浪涌),输出高达65V,主要用在工业,汽车和军事/航空航天.本文介绍了LTC3897主要特性,框图和十多种应用电路,以及演示板DC2108主要特性,电路图和材料清单.

The LTC.3897 is a synchronous boost DC/DC controller with surge stopper and ideal diode controller. The boost controller drives two N-channel power MOSFET stages out-of-phase to reduce input and output capacitor requirements, allowing the use of smaller inductors than the single-phase equivalent. Synchronous rectification reduces power loss and eases thermal requirements.

The surge stopper controls the gate of an external N-channel MOSFET to protect against high voltage input transients and provides in-rush current control, overcurrent protection and output disconnect for the boost converter. The integrated ideal diode controller drives another N-channel MOSFET to replace a Schottky diode for reverse input protection and
voltage holdup or peak detection. It controls the forward voltage drop across the MOSFET and minimizes reverse current flow.

The LTC3897 is available in thermally-enhanced 38-pin leadless QFN or 38-lead ....

查看全文