发明名称 |
Primary-side regulated modulation controller with improved transient response and audile noise |
摘要 |
A switching mode power supply, and a primary-side controlled PFM converter using the primary-side regulated PFM controller are discussed. In present embodiment, the primary side cycle by cycle switch peak current is no longer a constant. The time detector is added to monitor the waveform of primary-side sample voltage and then generate the duty cycle. The transfer function should be selected to satisfy a specific relationship of switching frequency and switch peak current against with output loading current. The new design shows higher switching frequency but lower value of switch peak current at light load condition. This resolves the audible noise and poor transient response issue from the prior art PFM controller. |
申请公布号 |
US8599581(B2) |
申请公布日期 |
2013.12.03 |
申请号 |
US201213398832 |
申请日期 |
2012.02.16 |
申请人 |
HUANG YUQUAN;KU MATTHEW MAN HO;FREMONT MICRO DEVICES (SZ) LIMITED |
发明人 |
HUANG YUQUAN;KU MATTHEW MAN HO |
分类号 |
H02M3/335 |
主分类号 |
H02M3/335 |
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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