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App note: Gate-source voltage behaviour in a bridge configuration

Posted on Sunday, June 16th, 2019 in app notes by DP

an_rohm_sic-mosfet_gate-source_voltage_an-e

App note from ROHM semiconductor on MOSFETS and IGBTs. Link here (PDF)

Power switching devices such as MOSFETs and IGBTs are used for various kinds of power supply applications, power supply line switching components, and other power applications. In addition, the circuit topologies used are diverse, parallel and series connections are widely used, not to mention single device use. Especially in bridge circuit configuration, in which the devices are connected in series, it is common to turn on and turn off each device alternately. Due to the current flowing and the voltage change in each device, the devices greatly affect one another. In this application note, we focus on Gate-Source voltage in MOSFET bridge configuration based on one of the simplest power circuits, a synchronous rectification boost converter to understand the switching operation in detail.

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