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Why are high side drivers used?
High-Side vs. The low-side driver is often used for powertrain-related loads such as motors, solenoids, and heaters. The high-side driver is used for fuel pumps, and body-related functions such as seats, lighting, wipers, and fans. The two drivers differ primarily with respect to their response to fault conditions.
What is high side gate driver?
Drive circuits for the high-side switches are called high-side drivers and are more complicated than low-side drivers because of the required voltage translation to the supply and because it is more difficult to turn off a floating switch. MOSFET Gate Drivers.
What is high side load switch?
High-side load switches are highly integrated power switches used to connect and disconnect a power source from a load. Using a load switch instead of a regular MOSFET offers several features including simplified design, small footprint, and protection features. Using MOSFETs as power switches.
Why do you need a high side driver for MOSFET?
Since the gate of the MOSFET has to be V G S volts higher than the source, a special IC is needed to translate the logic level at the CTL lead into the much higher gate voltage. Even if the N-channel was being used in a low-side configuration, the driver chip would be needed to properly drive the gate fast enough.
Which is the best high side gate driver?
So one can use a MOSFET gate driver such as the Micrel MIC5018. This allows a N-channel MOSFET to be used as a high-side switch. N-channel is preferred over P-channel in high current applications since its on resistance (R) is lower. Since the gate of the MOSFET has to be V volts higher than the source,…
Can a MOSFET be used to drive a relay?
If you are using it to drive an inductive load such as a relay or motor, make sure to put a suppression diode across the load. However they are not so good at supplying power to other circuits, because the ground reference for the driven circuit will be above the real ground by whatever the voltage drop through the MOSFET is.
Why do we need a low side driver?
Even if the N-channel was being used in a low-side configuration, the driver chip would be needed to properly drive the gate fast enough. It is also likely that the V G S value of the MOSFET is greater then the output of the microcontroller. Not the answer you’re looking for?