TNY-switch 288 SMPS Design - Fusible Resistor Calculation
Posted by: Nikhil Shah
on
Hello Folks!
I'm designing a TNY288 based SMPS. My transformer input inductance is 931uH. I'm using 320V MOV and have a doubt about Fusible Resistor calculation. Output Load is 12W. Input capacitor is 22uH 450V. (ckt flow -> input - fusible resistor - MOV - CM choke 22mH - bridge - 22uF450V cap - transformer)
Can anyone help me out regarding what Ohm/Watt value will be my WireWound flame proof resistor?
Please also give design equations.
Hi Nikhil,
You may use fusible resistor vendor application notes for computation. Sample link shown below:
https://www.ttelectronics.com/TTElectronics/media/ProductFiles/ApplicationNotes/UL-Recognised-Fusible-Resistors.pdf
Regards,
Jedidiah