High side and low side driver circuit

the high−side driver bias supply is integrated in the chip. The high−side driver is referenced to the switch node (HS) which is typically the source pin of the high−side MOSFET and drain pin of the low−side MOSFET. The low−side driver is referenced to VSS which is typically ground. The functions contained are the input stages, UVLO. High-Current, High Low-Side, Gate-Drive IC FAN Description The FAN is a monolithic high− and low−side gate−drive IC, which can drive high−speed MOSFETs and IGBTs that operate up to + V. It has a buffered output stage with all NMOS transistors designed for high pulse current driving capability and minimum cross−conduction. Using a Single-Output Gate-Driver for High-Side or Low-Side Drive Figure 3. High-Side Bootstrap Circuit Using Capacitor-Based Signal Isolation In Figure 2, the input to U1 is isolated using U3. U3 is capacitive signal isolator ISO77xx. Capacitive-based isolators can signal properly even with large common-mode ground slew-rates, they are more.

In a high-side switch, shown on the right, the load is between ground and the P-channel MOSFET doing the switching. The low-side switches are convenient for driving LEDs, relays, motors etc. because you can generally driven them directly from a microcontroller's output, as long as the V\$_{GS}\$ value of the MOSFET is lower than the output voltage of the pin. High-Side and Low-Side Drivers. Usually the computer will control an actuator by the use of low-side drivers. These drivers will complete the path to ground through an FET transistor to control the output device. Hie computer may monitor the voltage on this circuit to determine if the actuator operates when commanded. Using a Single-Output Gate-Driver for High-Side or Low-Side Drive Figure 3. High-Side Bootstrap Circuit Using Capacitor-Based Signal Isolation In Figure 2, the input to U1 is isolated using U3. U3 is capacitive signal isolator ISO77xx. Capacitive-based isolators can signal properly even with large common-mode ground slew-rates, they are more.

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