Flyback quick start driving circuit and driving method
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United States of America Patent
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Dec 29, 2015
Grant Date -
Jun 11, 2015
app pub date -
Jan 22, 2014
filing date -
Dec 6, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
The present disclosure discloses a flyback quick start driving circuit, comprising: a voltage input unit, a transformer including a primary winding, a secondary winding, and an auxiliary winding, a driving unit for controlling the primary winding of the transformer, a voltage pull-up unit, and a feedback control unit. The voltage pull-up unit performs a charging process according to the direct-current from the voltage input unit, so as to enable the output voltage rise up to a starting voltage which is input the driving unit. The driving unit output a control signal to drive the primary winding. Thus, a voltage is created across the auxiliary winding. The feedback control unit gets the voltage of the auxiliary winding, and determines whether to stop the charging of the voltage pull-up unit or not according to the voltage of the auxiliary winding. The circuit can be started quickly and have lower loss of the power.
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