Difference between high side and low side driver

Simply put a high side driver is situated between the componant and the positive side, and a low side driver is situated on the negative/low/ side. An H bridge is used to switch flow via a double throw switch, through to a DC motor, to allow it to be run in either direction.  · Motor controls with a H-bridge are the exception. This is due to the easy of the low side mosfet and the need of keeping the distance from the gate drive short. The shorter the better on mosfet gate drives, less problems with the switching. Also a low side switch allows using a high side "bus" to power many loads from the bus if needed. The principles of operation of high-side and low-side load switching are easy to grasp, but when do you prefer one method to the other?

The high-side driver is also capable of detecting an open circuit, even if the system is turned off. This is done by reading a feedback voltage to the microprocessor when the driver is off. A 5-volt, 50 мА current is fed through the circuit, which also has a resistor wired in parallel. Low voltage (less than volts) will indicate a normal circuit. If the voltage is high (above volts), a high resistance or open circuit is detected. High Side/Low Side Drive A semiconductor switch placed in the upper circuit with respect to an external load is referred to as high-side drive (power supply side), and when mounted in the lower circuit is called low side drive (ground side). The low-side switch is switching ground while the high-side switch is connecting the voltage supply. Generally in a circuit, you want to keep the ground connected and switch the power. One reason is that even when the transistor is fully turned on, there is still a small voltage drop across it.

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