D
D from BC
In spice I have these waveforms across the capacitor:
Voltage: 5Vpp 100 Khz triangle wave on 270VDC
Current: 2App (swings -1A to +1A.) square wave at 100Khz.
Capacitance: 1uF
Max. Ambient temp: 30C
Would a polypropylene film or electrolytic be better? There's lots of
spare PCB space..I prefer picking the longer life component..
I've read that heat ages electrolytics and one way to heat up an
electrolytic is with lots of ripple current to make I^2R heat.
When I looked at the polypropylene data sheets
http://www.vishay.com/docs/28124/mmkp383.pdf
I found AC vs frequency derating graphs.
What is this derating based on?? Heat? Material breakdown?
My app only has 5Vpp of AC and so a 400VDC pp film cap falls into the
safety zone at 100Khz..
But will it outlast an electrolytic?
How do I figure out if this cap gets toasty from the pulse current?
Do I look at the tangent of loss angle spec?
D from BC
Voltage: 5Vpp 100 Khz triangle wave on 270VDC
Current: 2App (swings -1A to +1A.) square wave at 100Khz.
Capacitance: 1uF
Max. Ambient temp: 30C
Would a polypropylene film or electrolytic be better? There's lots of
spare PCB space..I prefer picking the longer life component..
I've read that heat ages electrolytics and one way to heat up an
electrolytic is with lots of ripple current to make I^2R heat.
When I looked at the polypropylene data sheets
http://www.vishay.com/docs/28124/mmkp383.pdf
I found AC vs frequency derating graphs.
What is this derating based on?? Heat? Material breakdown?
My app only has 5Vpp of AC and so a 400VDC pp film cap falls into the
safety zone at 100Khz..
But will it outlast an electrolytic?
How do I figure out if this cap gets toasty from the pulse current?
Do I look at the tangent of loss angle spec?
D from BC