START-UP CIRCUIT, SWITCH CONTROL CIRCUIT HAVING THE START-UP CIRCUIT AND POWER SUPPLY DEVICE HAVING THE SWITCH CONTROL CIRCUIT
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United States of America Patent
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N/A
Issued Date -
Jan 1, 2015
app pub date -
Jun 27, 2014
filing date -
Jun 27, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A start-up circuit includes a first zener diode and a second zener diode coupled to each other, a first switch configured to perform a switching operation according to at least one of a first zener voltage of the first zener diode and a second zener voltage of the second zener diode, at least one second switch coupled to the first zener diode and the second zener diode, and a driving unit configured to drive the at least one second switch using a driving signal of a power switch which controls power supply.
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