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MOSFET (Si/SiC) Forum Discussions

krishnasai228
Level 1
First question asked Welcome!
Level 1

Hallo, 

I am using the IRF7458PBF Mosfet in my circuit for switching the battery pack as in the block diagram.

I need to know how to switch using this mosfet and whether to use the high side or low side switching better, please tell me in detail.

please help me

 

Thank you,

Saikrishna Reddy

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1 Solution
AnilKumar
Moderator
Moderator 25 replies posted 25 sign-ins 10 solutions authored
Moderator

Hello,

Thank you for posting your query in the Infineon community.

Please consider the following points to proceed further.

1.Since your optocoupler is an open drain output, you need to provide an external pull up to toggle between the logical states.

2.To drive a MOSFET (Either Low side/High side) you need to provide a gate driver circuit, as shown. Infineon provides smart switches, which has integrated gate driver.

Refer the below link:

https://www.infineon.com/cms/en/product/power/smart-low-side-high-side-switches/

AnilKumar_0-1649932341581.png

3.Can you explain the intention of placing an LDO after batter pack? What is your O/P load?

4.Do you want to charge the battery cells standalone or use them parallelly to drive a load?

Also please refer the below application note to understand pros and cons of High side and low side switches

https://www.infineon.com/dgdl/Infineon-Application+Note-PROFET+12V-What+the+designer+should+know-AN-...

Thanks & regards

Anil

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1 Reply
AnilKumar
Moderator
Moderator 25 replies posted 25 sign-ins 10 solutions authored
Moderator

Hello,

Thank you for posting your query in the Infineon community.

Please consider the following points to proceed further.

1.Since your optocoupler is an open drain output, you need to provide an external pull up to toggle between the logical states.

2.To drive a MOSFET (Either Low side/High side) you need to provide a gate driver circuit, as shown. Infineon provides smart switches, which has integrated gate driver.

Refer the below link:

https://www.infineon.com/cms/en/product/power/smart-low-side-high-side-switches/

AnilKumar_0-1649932341581.png

3.Can you explain the intention of placing an LDO after batter pack? What is your O/P load?

4.Do you want to charge the battery cells standalone or use them parallelly to drive a load?

Also please refer the below application note to understand pros and cons of High side and low side switches

https://www.infineon.com/dgdl/Infineon-Application+Note-PROFET+12V-What+the+designer+should+know-AN-...

Thanks & regards

Anil

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