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dear goldsmith:
we want to modify a dc to dc converter isolation voltage from 1.5k vdc to 4k vdc,
the size of circuit is not importmant ,but the size of pcb can not change,
so far,I know the winding of transformer can not all use copper winding for primary and secondary
by the way,how to...
dear ZekeR:
can you give an example for this paragraph"It is generally needed when creating a lower, isolated voltage from a higher voltage."？
thanks !
about (1),you means,we must confirm L at Dmin,the L have enough energy to provide the C and Load ,right ?
about (2),I means,I have had the experience of a problem about mosfet wave shake problem,
when I connect a small value ceramic capacitor between CS pin and RT/CT pin,
the mosfet wave will...
I have some questons:
(1)the output inductor (for forward),L=V*(1-D)/f*ΔI,where D is Dmin or Dmax,
which one is better ? why?
(2)current mode pwm ic ,connect a small value ceramic capacitor between CS pin
and RT/CT pin,someone said,it can improve steady the dc to dc converter,
why?
thanks!
d/c ,I mean date code(the same type mosfet,but date code is different)
the picture vgs wave at vin=24V,
OUTPUT:24V/500mA
"their difference in efficiency is about 6~7%"
the better mosfet efficiency about 81%
the better mosfet efficiency about 75%
I have a question
I use the same type mosfet,but the d/c is different
we use it on the same DC-DC converter,but their difference in efficiency is about
6~7%
as the picture,i measure their VGS wave have big difference
I can't point out their question
why?
i have a question about mosfet wave for forward dc to dc converter
I/P:9-36vdc
when vin=34v,at full load
as the following picture
please look at the part of mosfet wave off
it occur oscillation,what's reason ?
how to improve it ?
Ucc2813-0 & ucc28c43d question
ucc28c43 & ucc2813-0 datasheet as the fllowing:
**broken link removed**
**broken link removed**
1.as fgure 1.what does it mean in the figure 1's BLOCK DIAGRAM ?
figure 1
2.as figure 2,the vref pin and Ct/Rt pin connect capacitor and resistor can generate a...
i have a another question
we know the fuction of L is to store energy
if we add a capacitor at output,the coverter output is like a L-c filter
can we see the L as a filter ?
as the picture:
we know the RL circuit current curve discharging and charging is exponentional fuction rising and downing,but in buck ,when swich on and off ,the current curve is ramp fuction
why?
thanks !
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