goldsmith
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okay. so the "wrong" buck configuration was correct only for steady-sate period of time. not for the initial time. i understand.
so anyways, how do i connect the LIN ? is it ok to leave it grounded in the IR2110 ?
the only modification i need to do is connect the other hexfet to the LOW SIDE output of the driver.
i wonder how the buck configuration will be then. can you draw a sketch ? according to my buck schematics ?
Humm , SG3525 is a good choice for your aim because it can create enough dead time as well .
What is your problem now ?
A question , why you connected those out puts together with two diodes ?
Of course . it is correct .
And another thing that can be interesting for you is , a transformer driver . ( but it's quality isn't as high as a mosfet driver .)
Dear Garytie the two outputs (output A and output B) because each output produce only 1/2 cycle. Output B is 180 degree phase shifted from Output A.
when you use these two outputs independently, you get two seperated outputs with 180 degree phase difference and only 1/2 cycle. Output A will result first 1/2 cycle and output B will result the latter 1/2 cycle. They both symmetrical. when you tie them up - you get a whole cycle.
why diodes?
because the SG3525A has a totem-pole configuration on the outputs. if you tie the outputs together without diodes, the outputs will interfere each on another because of the totem-pole configuration.
Follow things that FvM told instead of Lin . he is quite right .okay. so the "wrong" buck configuration was correct only for steady-sate period of time. not for the initial time. i understand.
so anyways, how do i connect the LIN ? is it ok to leave it grounded in the IR2110 ?
the only modification i need to do is connect the other hexfet to the LOW SIDE output of the driver.
i wonder how the buck configuration will be then. can you draw a sketch ? according to my buck schematics ?
thank you alot !
Gary
Don't confuse about boot strap method . at first cycle the circuit will recover itself . in practice some first cycles are not important . but if there are important for you , a simple pulse transformer can be good . but i don't think that transient time is important for you . isn't it ?i have another question...i'll explode soon
you explained about LO and HO switching relationship according to LIN and HIN inputs.
does the bootstrap capacitor fully charge on the first cycle ? i.e when LO=1/HO=0 initially. and then when HO=0/LO=0 the capacitor supply drive voltage to the higher mosfet.
are there any more and more cycles of LO=1/HO=0? if not. its like a one-time switch for startup circuit. how will that be possible in reality ?
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