ISSUE IN DESIGN USING TOP 249 YN
Posted by: SUSHIL
on
Dear PI ,
We are facing problem in designing of TOP 249/247 YN ,In which we getting 48 V /150w supply, but the issue is that after the load of even 2A the TOP switch is too hot and thermal shut down the switch,Pls help.
TOP249 is intended for off-line universal input where the minimum DC input voltage is around 100 V. At 48V the RMS switch current will be much higher so it is not surprising that device is so hot. We do not have a device that can deliver 150 watts at such a low input voltage.