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1. (WO2018196062) DIRECT CURRENT TOPOLOGICAL CIRCUIT

Pub. No.:    WO/2018/196062    International Application No.:    PCT/CN2017/085170
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Sat May 20 01:59:59 CEST 2017
IPC: H02M 3/158
Applicants: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
深圳市华星光电技术有限公司
Inventors: CAO, Dan
曹丹
Title: DIRECT CURRENT TOPOLOGICAL CIRCUIT
Abstract:
A direct current topological circuit comprises: a control chip (10), a first field-effect transistor (Q1), a second field-effect transistor (Q2), a third field-effect transistor (Q3), a fourth field-effect transistor (Q4), and a first inductor (L1). A subtracter (12) and a control module (11) electrically connected with an output end of the subtracter are provided in the control chip. Two input ends of the subtracter are connected with an input voltage (Vin) and a load rated voltage (VN) respectively; a subtraction on the input voltage and the load rated voltage is performed by means of the subtracter; the control module correspondingly controls, according to the computation result, on and off of multiple field-effect transistors so that the direct current topological circuit enters different work modes; in the case that loads use the same connecting port and the same communication protocol, the direct current topological circuit can supply power to different loads having different rated voltages, thus expanding the application range of the direct current topological circuit.