Title:
DRIVE CONTROL CIRCUIT FOR POWER SEMICONDUCTOR ELEMENT, AND POWER CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2023/119411
Kind Code:
A1
Abstract:
In a drive control circuit (100), a mirror period determining circuit (190) determines whether it is a mirror period on the basis of a detection value of the voltage at a control electrode of a power semiconductor element (50), and stores a determination result in a flag register (145). A variable gate driver (170) applies a voltage to the control electrode of the power semiconductor element (50) with a current drive power in accordance with a current command value stored in an output port register (144). A controller (101) sequentially executes, in response to a gate signal (GS) supplied externally to the power semiconductor element (50), a plurality of instructions stored in at least one program memory (130, 131). The plurality of instructions include a conditional instruction for changing a current command value that is to be stored in the output port register (144) in accordance with the determination result, stored in the flag register (145), as to whether it is a mirror period.
Inventors:
TOMISAWA JUN (JP)
Application Number:
PCT/JP2021/047290
Publication Date:
June 29, 2023
Filing Date:
December 21, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03K17/081
Domestic Patent References:
| WO2021157221A1 | 2021-08-12 | |||
| WO2019207847A1 | 2019-10-31 | |||
| WO2014207811A1 | 2014-12-31 |
Foreign References:
| US20180234088A1 | 2018-08-16 | |||
| US20180013416A1 | 2018-01-11 | |||
| US20150372678A1 | 2015-12-24 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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