Switch mode power supply systems
This invention generally relates to methods and apparatus for sensing the output current in a switch mode power supply (SMPS), in particular using primary side sensing. A module for estimating the output current of a switch mode power supply (SMPS), said SMPS including a transformer with at least a...
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Main Authors | , , |
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Format | Patent |
Language | Chinese English |
Published |
01.07.2008
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Subjects | |
Online Access | Get full text |
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Summary: | This invention generally relates to methods and apparatus for sensing the output current in a switch mode power supply (SMPS), in particular using primary side sensing. A module for estimating the output current of a switch mode power supply (SMPS), said SMPS including a transformer with at least a primary winding coupled to an input of the SMPS and a secondary winding coupled to an output of the SMPS and having a power switching device to switch power to said primary winding of said transformer responsive to a drive signal, the module comprising: a current sense input to receive a current sense signal sensing a current in said primary winding of said transformer; a voltage sense input to receive a voltage sense signal from said primary or an auxiliary winding of said transformer; a drive signal input to receive said drive signal; a signal averager coupled to said drive signal input and to said current sense input to average said current sense signal over a period when said drive signal is controlling said po |
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Bibliography: | Application Number: TW200796124911 |