Invention Publication
- Patent Title: AUDIO AMPLIFIER WITH EMBEDDED BUCK CONTROLLER FOR CLASS-G APPLICATION
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Application No.: US18493282Application Date: 2023-10-24
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Publication No.: US20240056046A1Publication Date: 2024-02-15
- Inventor: XiangSheng Li , Ru Feng Du
- Applicant: STMicroelectronics (Shenzhen) R&D Co., Ltd.
- Applicant Address: CN Shenzhen
- Assignee: STMicroelectronics (Shenzhen) R&D Co., Ltd.
- Current Assignee: STMicroelectronics (Shenzhen) R&D Co., Ltd.
- Current Assignee Address: CN Shenzhen
- The original application number of the division: US17241980 2021.04.27
- Main IPC: H03G3/30
- IPC: H03G3/30 ; H03F3/187 ; H04R3/00 ; H04R29/00

Abstract:
An audio amplifier includes: a buck controller configured to control an output voltage at a first supply terminal, the output voltage selected from a set including a plurality of output voltages, where the output voltage takes a settling time to settle; a first audio bridge including: a class-AB driver stage coupled to the first supply terminal, and a delay insertion circuit configured to receive a processed digital stream and provide the processed digital stream to the class-AB driver stage a delay time after receiving the processed digital stream, where the delay time is based on the settling time; and an audio amplitude detector configured to detect a first peak amplitude in the first digital audio stream, where the buck controller is configured to select a lowest output voltage from the set that is higher than the first peak amplitude plus a headroom voltage.
Public/Granted literature
- US12231102B2 Audio amplifier with embedded buck controller for class-G application Public/Granted day:2025-02-18
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