TNY290PG - OUTPUT LOADING ISSUE
Posted by: anurag lokhande
on
HI,
SMPS designed for 12V 2A. ( Output waveform for voltage is clean at 0.7A load)
Please see results
Input AC | Output | ||||
Vin | I | Vout | R load | Iout | W |
160 | 0.07 | 12.23 | 20 | 0.6115 | 7.478645 |
160 | 0.1 | 12.25 | 17.8 | 0.688202 | 8.430478 |
Used reference from
--> Application note
Reference Design Report for a 20 W Standby Power Supply Using TinySwitchTM-4 TNY290PG |
Following are observation
1. At input voltage 160V, output voltage goes into hiccup mode when I increase load further
2. If Input voltage increase above 160V at constant load of 0.7A, the output voltage goes into hiccup mode
Please give your advice. Please let me know for any input required for further analysis.
Hi,
TNY290PG might have gone into overload. Details are in the Auto-Restart section in the datasheet. Is the hiccup duration every 2.5s?
Regards,