发明名称 |
DIMMER-CONTROLLED LEDS USING FLYBACK CONVERTER WITH HIGH POWER FACTOR |
摘要 |
A flyback controller generates a switching signal for controlling delivery of current into a primary winding of a transformer in a flyback converter. The controller may include an output current monitoring circuit configured to generate a signal representative of an average output current in a secondary winding of the transformer based on a peak input current in the primary winding and a duty cycle of current in the secondary winding. The flyback controller may generate a switching signal that causes a chopped AC voltage from a dimmer control to be converted by the flyback converter into an average output current from a secondary winding of the transformer that is DC isolated from the chopped AC voltage and that varies as a function of the setting of the dimmer control. The flyback controller may not utilize a signal from an opto-isolator.
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申请公布号 |
US2010141177(A1) |
申请公布日期 |
2010.06.10 |
申请号 |
US20080332299 |
申请日期 |
2008.12.10 |
申请人 |
LINEAR TECHNOLOGY CORPORATION |
发明人 |
NEGRETE MICHAEL GEORGE;GU WEI;LI ZHEN |
分类号 |
H05B37/02 |
主分类号 |
H05B37/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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