Invention Grant
US07791913B1 Secondary side switch-off timing adjusting method, apparatus, and system using same
有权
二次侧关断定时调整方法，装置和使用该方法的系统
- Patent Title: Secondary side switch-off timing adjusting method, apparatus, and system using same
- Patent Title (中): 二次侧关断定时调整方法，装置和使用该方法的系统
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Application No.: US12466479Application Date: 2009-05-15
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Publication No.: US07791913B1Publication Date: 2010-09-07
- Inventor: Wei-Chuan Su
- Applicant: Wei-Chuan Su
- Applicant Address: TW Hsin-Chu
- Assignee: Grenergy Opto, Inc.
- Current Assignee: Grenergy Opto, Inc.
- Current Assignee Address: TW Hsin-Chu
- Agency: Sinorica, LLC
- Agent Ming Chow
- Main IPC: H02M5/42
- IPC: H02M5/42 ; H02M3/335
Abstract:
The present invention discloses a secondary side switch-off timing adjusting method for a switching power conversion, comprising: detecting the falling edge of the voltage across a secondary side transistor according to a first reference voltage to generate a first reset signal; detecting the rising edge of the voltage across the secondary side transistor according to a second reference voltage to generate a first set signal; generating a secondary side discharging end signal from a latch operation in response to the first reset signal and the first set signal; and generating an off-predicting signal according to the cycle period of the secondary side discharging end signal. The present invention also provides a secondary side switch-off timing adjusting apparatus, and a system using the apparatus for a power conversion.
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