Muthukrishnan
DIIDevHeads IoT Integration Server
•Created by wafa_athmani on 5/14/2024 in #firmware-and-baremetal
How to Resolve Connection Errors When Uploading Code to ATmega32A Microcontroller?
hi i select the IR21844 gate driver and NCE4080K N-MOSFETs in your full-bridge converter design, i need to ensure compatibility between the gate driver's output voltage and the MOSFET's gate-source voltage.
The IR21844 is a high-speed power MOSFET and IGBT driver with independent high and low side referenced output channels. The datasheet specifies that the high side (HO) output voltage (VSH) can swing from (VB - 0.3V) to (VS - 0.3V). Here, VB is the boot strap voltage and VS is the power supply voltage.
The NCE4080K N-MOSFET's gate-source voltage (VGS) is typically specified as ±25V. This means the gate voltage can swing from -25V to +25V.
Considering these specifications:
Gate Driver Output Voltage (HO):
The gate driver's HO high side output voltage (VSH) should be compatible with the N-MOSFET's gate-source voltage requirements.
Make sure that the voltage swing of the gate driver's output is within the allowed range of the MOSFET's gate-source voltage.
Bootstrap Voltage (VB):
The bootstrap voltage (VB) typically ranges from 0V to 625V. This voltage is used to drive the high-side MOSFETs efficiently.
Ensure that the bootstrap voltage is within the specified limits of the gate driver and that it provides sufficient gate drive voltage for your MOSFETs.
6 replies