LM3424: lm3424 low side

Big Bill

Expert 1980 points

Part Number: LM3424
Other Parts Discussed in Thread: TPS92691

Dear All：

I received the question from my customer.

The LM3424 are implemented the high side current sense function.

Can this current sense use as low side current such as following ?

in my customer application, they must put the sample resistance on the low side, if the LM3424 can't meet the function , can i add extra circuit to implement the needs？

or can you suggest other IC to meet the application？ Thanks

over 4 years ago

0 Tuan Tran74 over 4 years ago

TI__Genius 17640 points

Hello,

You cannot implement low side current sensing with the LM3424. Please look into using the TPS92691 for low side current sensing.

Thanks Tuan

0 Big Bill over 4 years ago in reply to Tuan Tran74

Expert 1980 points

Dear Tran74:

Thanks for your reply. if i add the extra circuit , for example amplifier, can i implement low side current sensing ?

0 Tuan Tran74 over 4 years ago in reply to Big Bill

TI__Genius 17640 points

Hello,

You can attempt to implement that if you meet all of the LM3424 requirements. We do not recommend that if you are not familiar with the part and external design requirements. We recommend you look at the TPS92691.

Thanks Tuan

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LM3424: lm3424 low side