franticEB
Full Member level 3
Hi, i've realized a prototype board with a DCM flyback converter with these features:
Vin=50V
Vout=250V
Pout=50W
Fsw=100Khz
I've connected thi prototype with laboratory power supplies and the converter seemed stable to vary the input voltage and the load.
Now i had to import that converter on the ultimate board and i connected to others board's power supply in this way:
The converter is not stable yet, and after numerous attempts the only way to make the smps stable is to do this connection
What may have gone wrong in this final board? Is there any common mode noise that make my pwm driver unstable?
Could you help me?
Vin=50V
Vout=250V
Pout=50W
Fsw=100Khz
I've connected thi prototype with laboratory power supplies and the converter seemed stable to vary the input voltage and the load.
Now i had to import that converter on the ultimate board and i connected to others board's power supply in this way:
The converter is not stable yet, and after numerous attempts the only way to make the smps stable is to do this connection
What may have gone wrong in this final board? Is there any common mode noise that make my pwm driver unstable?
Could you help me?