Sandwich mode意思

"Sandwich mode" is a term used in the context of electronic devices, particularly in the field of power electronics, to describe a configuration of semiconductor devices, such as insulated gate bipolar transistors (IGBTs) or metal-oxide-semiconductor field-effect transistors (MOSFETs), in which two devices are connected in series with a common source or drain terminal. This configuration is called "sandwich" because it resembles two slices of bread (the semiconductor devices) with a "filling" (the source or drain terminal) in the middle.

In a sandwich mode configuration, the two semiconductor devices share a common current path, and they are typically driven by a single gate signal that is applied to both devices simultaneously. This configuration is used to increase the current handling capability of the devices, as the current is divided between the two devices. It also provides a degree of redundancy, as if one device fails, the other can still carry the current.

Sandwich mode is commonly used in high-power applications, such as inverters, motor drives, and power converters, where high current and high voltage ratings are required. It is also used in applications where high efficiency and low switching losses are important, as the parallel connection of the gate electrodes can help to reduce the overall gate charge and improve switching performance.