发明名称 |
PRE-BIAS PROTECTION CIRCUIT FOR CONVERTER |
摘要 |
A pre-bias protection circuit for a converter circuit including a switching stage having high- and low-side switches connected in series at a switching node and an output stage connected to the switching node having a capacitor having a pre-existing pre-bias voltage at startup of the converter circuit, the pre-bias protection circuit controlling discharge of the pre-bias voltage when the low-side switch is turned ON during a start up of the converter circuit. The pre-bias protection circuit includes a first circuit for providing a first output; a second circuit providing a second output; and a comparator circuit for comparing the first output and the second output and producing a third output comprising a pulse width modulated signal for driving the low side switch such that the pulse width modulated signal starts with a small duty cycle and thereafter increases to a larger duty cycle, thereby to prevent the pre-bias voltage from discharging during startup.
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申请公布号 |
WO2008013871(A9) |
申请公布日期 |
2008.08.28 |
申请号 |
WO2007US16766 |
申请日期 |
2007.07.26 |
申请人 |
INTERNATIONAL RECTIFIER CORPORATION;PARTO, PARVIZ;CHEN, YANG |
发明人 |
PARTO, PARVIZ;CHEN, YANG |
分类号 |
G05F1/656;G05F1/652 |
主分类号 |
G05F1/656 |
代理机构 |
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地址 |
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