Invention Grant
US09484758B2 Hybrid bootstrap capacitor refresh technique for charger/converter
有权
充电器/转换器的混合自举电容刷新技术
- Patent Title: Hybrid bootstrap capacitor refresh technique for charger/converter
- Patent Title (中): 充电器/转换器的混合自举电容刷新技术
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Application No.: US13801817Application Date: 2013-03-13
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Publication No.: US09484758B2Publication Date: 2016-11-01
- Inventor: Bin Chen , Mao Ye , Yongxuan Hu
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Blank Rome LLP
- Main IPC: H02M3/04
- IPC: H02M3/04 ; H02M3/335 ; G05F1/00 ; H02J7/00 ; H02M3/158 ; G05F3/08 ; H02M3/28 ; H02M1/00

Abstract:
The disclosed embodiments provide a synchronous switching converter that converts a DC input voltage into a DC output voltage. This synchronous switching converter includes a high-side switching MOSFET coupled between an input node and a first node. The converter also includes a low-side switching MOSFET coupled between the first node and a ground node and is in series with the high-side switching MOSFET. This converter additionally includes a bootstrap capacitor coupled to the high-side switching MOSFET to provide turn-on voltage for the high-side switching MOSFET. Furthermore, the converter includes a main refresh circuit coupled to the bootstrap capacitor and is configured to refresh the bootstrap capacitor during a first operating mode of the synchronous switching converter. Moreover, the converter includes an auxiliary refresh circuit coupled to the main refresh circuit and the bootstrap capacitor and is configured to refresh the bootstrap capacitor during a second operating mode of the converter.
Public/Granted literature
- US20140217959A1 HYBRID BOOTSTRAP CAPACITOR REFRESH TECHNIQUE FOR CHARGER/CONVERTER Public/Granted day:2014-08-07
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