Circuit for driving a half-bridge

Details Circuit for driving a half-bridge Circuit for driving a half-bridge

H - Electricity

03

K

H03K 17/04 (2006.01) H03K 17/06 (2006.01) H03K 17/687 (2006.01) H03K 19/017 (2006.01) H02M 7/538 (2006.01)

Patent

CA 2139229

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, an 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.

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