Title:
SYNCHRONOUS RECTIFYING CIRCUIT, CONTROL CIRCUIT THEREOF, WIRELESS POWER-RECEIVING DEVICE, AND ELECTRONIC EQUIPMENT
Document Type and Number:
Japanese Patent JP2016220351
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a synchronous rectifying circuit with improved efficiency.SOLUTION: A first variable voltage source VS1 generates a variable first threshold voltage V. A first zero current detecting comparator ZC_CMP1 compares first voltage Vof a first input node AC1 with the first threshold voltage V, and generates a ZC_DET1 signal indicating the comparison results. A first adjusting comparator ADJ_CMP1 compares the first voltage Vwith reference voltage V. A first adjusting unit 210 changes the first threshold voltage Vgenerated by the first variable voltage source VS1 on the basis of an output VF_DET1 of the first adjusting comparator ADJ_CMP1. A control logic 202 changes a state of a bridge circuit 102 according to at least a first detecting signal ZC_DET1.SELECTED DRAWING: Figure 3
Inventors:
INOUE NAOKI
Application Number:
JP2015101298A
Publication Date:
December 22, 2016
Filing Date:
May 18, 2015
Export Citation:
Assignee:
ROHM CO LTD
International Classes:
H02M7/21; H02J50/00
Foreign References:
| US20150117076A1 | 2015-04-30 | |||
| US8441238B2 | 2013-05-14 |
Attorney, Agent or Firm:
Sakaki Morishita
Masaki Taiki
Masaki Taiki