High-side-driver gate drive circuit

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver

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Details

327436, 327538, 327545, 323315, 323317, H03K 300

Patent

active

057962766

ABSTRACT:
A high-side gate driving circuit, where a current-mode differential error amplifier is used to regulate the current sourced to the gate. A current path is provided from the gate to the source of the power device, and a constant current is provided to the gate. A variable current source is also provided, and this current source is controlled by the output of the error amplifier. Preferably a voltage offset (avalanche breakdown diode) is interposed between the gate and source of the high-side driver; this ensures that the feedback loop will operate in a bistable mode, which avoids instability problems.

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Wurzburg, "Ideas for Design", Electronics Design 19, Sep. 13, 1975.

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