gauravkothari23
Advanced Member level 2
Hi all,
I have a 12V-1 Amp SMPS design which i assembled it using through hole components. all the resistor are in 1/4 watts, zener diode are in 1/2 watts. (Circuit Attached)
but now the same SMPS Design i converted in SMD Package (only Resistors and diode in 1206 package, and rest of all are still in through hole package)
so now when i ON the SMPS with SMD Package, The iC MJE13005 burns out in just few seconds and SMPS stops working, but the same when i ON the SMPS with through hole package, it works well even at full load and that too without Heatsink for MJE13005.
can anybody please let me know, what changes have to do conversion of PCB from through hole to SMD.
I have a 12V-1 Amp SMPS design which i assembled it using through hole components. all the resistor are in 1/4 watts, zener diode are in 1/2 watts. (Circuit Attached)
but now the same SMPS Design i converted in SMD Package (only Resistors and diode in 1206 package, and rest of all are still in through hole package)
so now when i ON the SMPS with SMD Package, The iC MJE13005 burns out in just few seconds and SMPS stops working, but the same when i ON the SMPS with through hole package, it works well even at full load and that too without Heatsink for MJE13005.
can anybody please let me know, what changes have to do conversion of PCB from through hole to SMD.