Smart matching step-down circuits and travel-use power conversion devices

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United States of America Patent

PATENT NO RE48368
SERIAL NO

16412444

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Abstract

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Provided is a smart matching step-down circuit, comprising an alternating current input terminal (10), a rectifier filter circuit (20), a switching circuit (30), a high voltage BUCK control step-down circuit (40), a floating zero potential control circuit (41), a voltage detection and feedback circuit (50), a PWM controller (52), a full-bridge DC/AC converter circuit (60), an alternating current output terminal (70), an output voltage detection circuit (62), and a conversion controller (80); the high voltage BUCK control step-down circuit comprises a step-down inductor (L1) and a step-down capacitor (C18); the first end of the step-down inductor is connected to the output terminal of the switching circuit; the second end of the step-down inductor is connected to the positive electrode of the step-down filter capacitor, and is used for stepping down and filtering the pulse voltage, then outputting a second current; the floating zero potential control circuit comprises a flyback diode (D11, D12); the cathode of the flyback diode is connected to the circuit ground, together with the first end of the step-down inductor; the anode of the flyback diode is connected to the floating ground (GND), together with the negative electrode of the step-down filter capacitor; the smart matching step-down circuit can step down a wide voltage, and is broadly adaptable.

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Patent Owner(s)

Patent OwnerAddress
GUANGDONG BESTEK MEDICAL DEVICES CO LTD3 FLOOR NO 358 BAOTIAN ROAD ONE TIEGANG COMMUNITY XIXIANG TOWN BAO'AN DISTRICT SHENZHEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Xu, Xinhua Shenzhen, CN 68 1420

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