发明名称 |
DC to DC converter method and circuitry |
摘要 |
A DC-to-DC converter has a pulse width modulator PWM) and a hysteretic (ripple) modulator. For low current loads, the hysteretic modulator is selected; for high current loads, the PWM is selected. A mode selection switch senses the polarity of the switched output voltage at the end of each switching cycle. If the polarity changes from one cycle to the next, the mode may be instantly changed to the other mode. Counters are used to record the polarity at the end of each cycle and switching from one mode to another can be delayed by the counters to prevent changing modes based on spurious output voltage fluctuations.
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申请公布号 |
US2001035745(A1) |
申请公布日期 |
2001.11.01 |
申请号 |
US20010846721 |
申请日期 |
2001.05.01 |
申请人 |
MURATOV VOLODYMYR A.;HODGINS ROBERT G.;JOCHUM THOMAS A. |
发明人 |
MURATOV VOLODYMYR A.;HODGINS ROBERT G.;JOCHUM THOMAS A. |
分类号 |
H02M3/156;H02M3/158;(IPC1-7):G05F1/40 |
主分类号 |
H02M3/156 |
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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