cupoftea
Advanced Member level 5
Hi,
We wish to do an SMPS with SG3524 as primary side controller. The opto transistor will pull down the COMP pin of SG3524, to give regulation.
So we will connect the + input of the SG3524 error amp to 2.5V (divided down 5vref)....and the "-" input of the internal error amp to GND.
Then the COMP pin will be nice for us to pull down with the opto.
But the error amp in SG3524 has common mode input range of 1.8 to 3.5V....so should we in fact best
connect the "-" input of the internal error amp to , say 2v?
What would be the worst that could happen if we connect "-" input to GND? Surely not phase reversal?
SG3524
We wish to do an SMPS with SG3524 as primary side controller. The opto transistor will pull down the COMP pin of SG3524, to give regulation.
So we will connect the + input of the SG3524 error amp to 2.5V (divided down 5vref)....and the "-" input of the internal error amp to GND.
Then the COMP pin will be nice for us to pull down with the opto.
But the error amp in SG3524 has common mode input range of 1.8 to 3.5V....so should we in fact best
connect the "-" input of the internal error amp to , say 2v?
What would be the worst that could happen if we connect "-" input to GND? Surely not phase reversal?
SG3524