发明名称 |
Method and apparatus for maintaining a constant load current with line voltage in a switch mode power supply |
摘要 |
A power supply including a regulation circuit that maintains an approximately constant load current with line voltage. In one embodiment, a regulation circuit includes a semiconductor switch and current sense circuitry to sense the current in the semiconductor switch. The current sense circuitry has a current limit threshold. The regulation circuit current limit threshold is varied from a first level to a second level during the time when the semiconductor switch is on. One embodiment of the regulation circuit is used in a power supply having an output characteristic having an approximately constant output voltage below an output current threshold and an approximately constant output current below an output voltage threshold.
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申请公布号 |
US6781357(B2) |
申请公布日期 |
2004.08.24 |
申请号 |
US20020253307 |
申请日期 |
2002.09.23 |
申请人 |
POWER INTEGRATIONS, INC. |
发明人 |
BALAKRISHNAN BALU;DJENGUERIAN ALEX B.;WONG KENT;MATTHEWS DAVID MICHAEL HUGH |
分类号 |
H02M3/28;H02M3/335;(IPC1-7):G05F1/40;H02M3/24 |
主分类号 |
H02M3/28 |
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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