5V regulated power supply circuit with expansion and overvoltage protection (7805) - Power Circuit - Circuit Diagram

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

TP-IP4220CZ6 5V 0.35PF breakdown voltage 6V SOT

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5V regulated power supply circuit with expansion and overvoltage protection (7805)

As shown in the figure, a +5V regulated power supply circuit with expansion and overvoltage protection functions, which uses a three-terminal regulator 7805 (maximum current 1.5A) to extend the current across the high-power transistor. The output current of this power supply can reach about 2.5A. At the same time, 5.6V voltage regulator, VD3, R3 and Vs (thyristor) are used to form an overvoltage protection circuit. For some reason, when the output voltage of the power supply reaches or exceeds 5.6V (VD3 voltage regulation value), VD3 will be turned on and turned on, and the thyristor Vs will be turned on by the trigger voltage, causing the FU fuse to be quickly blown. This protects the load. This power supply can be used as an experimental power supply