发明名称 |
OVERVOLTAGE PROTECTION SYSTEM FOR POWER SYSTEM WITH MULTIPLE PARALLEL-CONNECTED SWITCHING POWER SUPPLIES |
摘要 |
An OVP system which includes a plurality of OVP circuits coupled to respective parallel-connected switching power supplies. Each OVP circuit comprises a bus voltage overvoltage detection circuit having a first output which toggles when the voltage on the common power bus exceeds a reference voltage, a modulation flag detection circuit which receives a value that varies with a parameter associated with the PWM or PFM drive signals generated for the switching power supply to which the OVP circuit is coupled and has a second output which toggles when the parameter value exceeds a reference parameter value, logic circuitry which toggles an output when both the first and second outputs toggle, and an overvoltage response circuit which initiates a course of action such as latching or shutting down the switching power supply to which the OVP circuit is coupled when the logic circuitry's output toggles. |
申请公布号 |
US2013335862(A1) |
申请公布日期 |
2013.12.19 |
申请号 |
US201213523622 |
申请日期 |
2012.06.14 |
申请人 |
XIE RENJIAN;OU YINGYANG;SHENG HUAILIANG;HUANG QINGYI;ANALOG DEVICES, INC. |
发明人 |
XIE RENJIAN;OU YINGYANG;SHENG HUAILIANG;HUANG QINGYI |
分类号 |
H02H9/00 |
主分类号 |
H02H9/00 |
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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