HIGH SPEED CHARGE CONTROL FOR POWER SWITCHING DEVICES

摘要

Disclosed are systems, devices, apparatus, circuits, methods, and other implementations, including a system that includes one or more power switching devices that receive power delivered by a power unit, and a high-speed charge control circuit electrically coupled to the one or more power switching devices. The high-speed charge control circuit includes an optocoupler coupled to the power unit and further coupled to a first switching device of the high-speed charge control circuit, the first switching device actuated based on output of the optocoupler to establish an electrical path to discharge at least a portion of electrical charge present at least on the one or more power switching devices when power delivery from the power unit is stopped.

主权项

1. A system comprising:
one or more power switching semiconductor devices that receive power delivered by a power unit; and a high-speed charge control circuit electrically coupled to the one or more power switching semiconductor devices, the high-speed charge control circuit comprising:
a charging circuit to provide an initial electrical charge to the one or more power switching semiconductor devices when power delivery from the power unit is activated, the charging circuit comprising:
a switching device actuated to an ON state in response to the power for powering the one or more power switching semiconductor devices being delivered from the power unit; anda capacitor coupled to a terminal of the switching device, the capacitor configured to hold the initial electrical charge, previously stored on the capacitor while the power unit was not delivering power to the one or more power switching semiconductor devices, and to deliver the initial electrical charge to the one or more power switching semiconductor devices through the switching device when the switching device is actuated to the ON state in response to activation of the power delivery for powering the one or more power switching semiconductor devices.