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To prevent this from happening, a gate driver is provided between the microcontroller output signal and the power transistor. Charge pumps are often used in H-Bridges in high side drivers for gate driving the high side n-channel power MOSFETs and IGBTs. These devices are used because of their good performance, but require a gate drive voltage a ...
Another advantage is that more than one open-collector output can be connected to a single line. If all open collector outputs attached to a line are off (i.e. in the high-impedance state), the pull-up resistor will be the only device setting the line's voltage and will pull the line voltage high.
The most efficient MOSFET designs use N-channel MOSFETs on both the high side and low side because they typically have a third of the ON resistance of P-channel MOSFETs. This requires a more complex design since the gates of the high side MOSFETs must be driven positive with respect to the DC supply rail.
When the low-side N-FET turns off, the low side of the bootstrap capacitor remains connected to the source of the high-side N-FET, and the capacitor discharges some of its energy driving the gate of the high-side N-FET to a voltage sufficiently above V+ to turn the high-side N-FET fully on; while the bootstrap diode blocks that above-V+ voltage ...
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Diodes' products include diodes, rectifiers, transistors, MOSFETs, [1] protection devices, functional specific arrays, single gate logic, amplifiers and comparators, Hall effect and temperature sensors; power management devices, [2] including LED drivers, AC-DC converters and controllers, DC-DC switching [3] and linear voltage regulators, and ...
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