Invention Grant
- Patent Title: Switch-mode drive sensing of reverse recovery in bipolar junction transistor (BJT)-based power converters
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Application No.: US14634716Application Date: 2015-02-27
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Publication No.: US09609701B2Publication Date: 2017-03-28
- Inventor: John L. Melanson , Ramin Zanbaghi , Thirumalai Rengachari , Prashanth Drakshapalli , Rahul Singh , Arnab Kumar Dutta
- Applicant: Cirrus Logic, Inc.
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agency: Norton Rose Fulbright US LLP
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H05B33/08 ; H02M3/335
Abstract:
A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as a converter in LED-based light bulbs. The power stage may be operated by a controller to maintain a desired current output to the LED load. The controller may operate the power stage by monitoring a start and end of a reverse recovery time of the BJT. Information regarding the start and end of the reverse recovery time may be used in the control of the power stage to improve efficiency of the power stage.
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