1 Solution
Moderator
Hi,
If the MOSFETs used for paralleling are similar then its not an issue. But if they are not, then various problems occur. Please refer the following link for design considerations during paralleling of MOSFETS,
https://www.infineon.com/dgdl/para.pdf?fileId=5546d462533600a401535744b4583f79
The design considerations during paralleling of MOSFET are different for each topology and load conditions.
For the gate drive consideration, please refer the below image,
Using individual gate drivers for each MOSFET in the group is usually unnecessary. They may be necessary in applications where fast switching of a large group of large die MOSFETs is needed. Here the MOSFETs should be arranged in smaller sub groups, each sub group driven by an individual gate driver. Care should be taken to balance the circuit
so the propagation delays of all the gate drivers are similar. This matching ensures that the switching of all the MOSFETs in the group is synchronized. Usually it is sufficient to drive the gate of each MOSFET in the group from the same gate driver. However, it is important to have a gate resistor between the gate driver output and the gate of each
MOSFET as mentioned earlier.
For the type of package, Conventionally packaged surface-mounted MOSFETs (DPAK and D2PAK) are the most widely available types so they are considered first for paralleled groups. However, KGD and LFPAK (power SO8) MOSFETs could offer better solutions.
Regards,
Abhilash P
If the MOSFETs used for paralleling are similar then its not an issue. But if they are not, then various problems occur. Please refer the following link for design considerations during paralleling of MOSFETS,
https://www.infineon.com/dgdl/para.pdf?fileId=5546d462533600a401535744b4583f79
The design considerations during paralleling of MOSFET are different for each topology and load conditions.
For the gate drive consideration, please refer the below image,
Using individual gate drivers for each MOSFET in the group is usually unnecessary. They may be necessary in applications where fast switching of a large group of large die MOSFETs is needed. Here the MOSFETs should be arranged in smaller sub groups, each sub group driven by an individual gate driver. Care should be taken to balance the circuit
so the propagation delays of all the gate drivers are similar. This matching ensures that the switching of all the MOSFETs in the group is synchronized. Usually it is sufficient to drive the gate of each MOSFET in the group from the same gate driver. However, it is important to have a gate resistor between the gate driver output and the gate of each
MOSFET as mentioned earlier.
For the type of package, Conventionally packaged surface-mounted MOSFETs (DPAK and D2PAK) are the most widely available types so they are considered first for paralleled groups. However, KGD and LFPAK (power SO8) MOSFETs could offer better solutions.
Regards,
Abhilash P
3 Replies
Moderator
Hi,
If the MOSFETs used for paralleling are similar then its not an issue. But if they are not, then various problems occur. Please refer the following link for design considerations during paralleling of MOSFETS,
https://www.infineon.com/dgdl/para.pdf?fileId=5546d462533600a401535744b4583f79
The design considerations during paralleling of MOSFET are different for each topology and load conditions.
For the gate drive consideration, please refer the below image,
Using individual gate drivers for each MOSFET in the group is usually unnecessary. They may be necessary in applications where fast switching of a large group of large die MOSFETs is needed. Here the MOSFETs should be arranged in smaller sub groups, each sub group driven by an individual gate driver. Care should be taken to balance the circuit
so the propagation delays of all the gate drivers are similar. This matching ensures that the switching of all the MOSFETs in the group is synchronized. Usually it is sufficient to drive the gate of each MOSFET in the group from the same gate driver. However, it is important to have a gate resistor between the gate driver output and the gate of each
MOSFET as mentioned earlier.
For the type of package, Conventionally packaged surface-mounted MOSFETs (DPAK and D2PAK) are the most widely available types so they are considered first for paralleled groups. However, KGD and LFPAK (power SO8) MOSFETs could offer better solutions.
Regards,
Abhilash P
If the MOSFETs used for paralleling are similar then its not an issue. But if they are not, then various problems occur. Please refer the following link for design considerations during paralleling of MOSFETS,
https://www.infineon.com/dgdl/para.pdf?fileId=5546d462533600a401535744b4583f79
The design considerations during paralleling of MOSFET are different for each topology and load conditions.
For the gate drive consideration, please refer the below image,
Using individual gate drivers for each MOSFET in the group is usually unnecessary. They may be necessary in applications where fast switching of a large group of large die MOSFETs is needed. Here the MOSFETs should be arranged in smaller sub groups, each sub group driven by an individual gate driver. Care should be taken to balance the circuit
so the propagation delays of all the gate drivers are similar. This matching ensures that the switching of all the MOSFETs in the group is synchronized. Usually it is sufficient to drive the gate of each MOSFET in the group from the same gate driver. However, it is important to have a gate resistor between the gate driver output and the gate of each
MOSFET as mentioned earlier.
For the type of package, Conventionally packaged surface-mounted MOSFETs (DPAK and D2PAK) are the most widely available types so they are considered first for paralleled groups. However, KGD and LFPAK (power SO8) MOSFETs could offer better solutions.
Regards,
Abhilash P
