This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM258A: LM258A/LM2904 Pls help to suggestion How to improved current sensing circuit operation range -20C to 80C ?

Part Number: LM258A

Dear All

Pls help to suggestion How to improved current sensing circuit operation range -20C to 80C ?

Test result is below .

@ 25C   set current is 3.958A  the output opamp is 2.493V   the result is PASS

@ 55C   set current is 3.625A the output opamp is 2.493V  the result is FAIL because the power supply is not operation at max load(3.791A )

@ -20C   set current 4.166A the output opamp is 2.493V  the result is FAIL  because the power supply is not protection by current limit ( 3.958A current limit ) 

Remark :

1.The maximum output current of PSU is 3.791A  

2.Current limit is 3.958A  

Thank you so much&Bestregard

Prarinya