发明名称 |
MODULATED SNUBBER DRIVER FOR ACTIVE SNUBBER NETWORK |
摘要 |
A switching boost type voltage regulator includes a resonant snubber network connected in parallel with its FET power switch. The snubber includes a FET auxiliary switch that is connected and turned on in order to reduce the voltage across the FET power switch to a zero level at its turn-on transition. A driver circuit, driven by a voltage regulating pulse width modulation (PWM) pulse, initially turns on the FET auxiliary switch to reduce a voltage across the FET power switch and then turns on the FET power switch when the voltage across drops below a threshold level. The FET auxiliary switch is turned off when the FET power switch is turned on. A latch circuit insures the complimentary states of these two switches. The snubber circuit is disabled a near to zero voltage regardless of line and load levels and hence the power dissipation in the snubber is significantly reduced.
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申请公布号 |
CA2136476(A1) |
申请公布日期 |
1995.05.31 |
申请号 |
CA19942136476 |
申请日期 |
1994.11.23 |
申请人 |
AMERICAN TELEPHONE AND TELEGRAPH COMPANY |
发明人 |
GARCIA, RICHARD R.;ZAVERI, PRADHUMAN S. |
分类号 |
H02M7/00;H02M3/155;H02M3/158;H02M7/12;H03K17/0814;(IPC1-7):H02M7/217 |
主分类号 |
H02M7/00 |
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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