[300V output]

how to design 300V,0.266A output using SMPS Switch?

[SMPS Switch]

hi,
can we use a high power handling SMPS switch for a low power.

[Fusible resistor]

hi,
Actually there are 8 boards. 6 are working fine. only 2 boards are giving the problem. fuse blows when no battery is connected to the output. power suuply o/p is 5V & battery for battery 3.6V is needed. :)

[Fusible resistor]

output power is 1.25W. we used 10E,1w fusible resistor. it got blowed & diode in the bridge rectifier connected in the neutral path also got blowed.then we used 20E,1W fusible resistor, again same thing happened. can u assist me what to do further? ther e is no current meter. my question was is there any relation b/w primary peak current to choose the value of fusible resistor or fuse. if not how to calculate fuse value.

[chip capacitor]

how to identify the value of chip capacitor? code is not written in that capacitor. i can make out that is ceramic chip capacitor

[Fusible resistor]

sorry I cant post the schematics. can u tel me is there any formula to calculate fusible resistor. end application is battery charger. and can u tel me the relation between the  peak primary current?

[Fusible resistor]

how to select the value of fusible resistor