发明名称 |
High voltage integrated circuit driver for half-bridge circuit employing a bootstrap diode emulator |
摘要 |
A half-bridge driver circuit including a lower drive module and a floating upper drive module for driving respective external upper and lower power transistors of a high voltage half bridge is contained in an integrated circuit chip which includes an on-chip bootstrap diode emulator for charging an external bootstrap capacitor that powers the upper drive module. The upper drive is accommodated in an insulated well and the diode emulator includes as its main current carrying element, a LDMOS transistor formed along the periphery of the well. The LDMOS transistor is driven into a conducting state at the same time the lower power transistor is driven into a conducting state. A clamp and current source solidly bias the backate of the LDMOS while limiting the current drawn by a parasitic transistor attached to the backgate during startup of the LDMOS.
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申请公布号 |
US5502632(A) |
申请公布日期 |
1996.03.26 |
申请号 |
US19940275569 |
申请日期 |
1994.07.15 |
申请人 |
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION |
发明人 |
WARMERDAM, LEO F. P.;JANASWAMY, ANAND |
分类号 |
H02M7/537;H02M1/08;H02M7/538;H03K17/06;H03K17/687;(IPC1-7):H02M3/24;H02M3/335 |
主分类号 |
H02M7/537 |
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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