yogikool
Newbie level 5
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Hi all
pl. find the tipical connection ckt. giiven in IR2110 datasheet
I’m using this typical connection ckt. For driving a Lamp load( two 800w lamps in parallel—total resistance ==2.68 ohm) for my study experiment purpose.
Load supply voltage =300vdc;
I’m using IGBT instead of MOSFET
My switching frequency is 200HZ , 50 % duty cycle (is it too low???)
Hin & Lin pins are shorted just because to turn on & off both IGBTs at same time & for same period ; (is this right ???)
Problem I’ facing:::---
After exactly 35 ms the High side gate drive pulse (HO) is missing for 1 sec., while there is no problem fo LO, this reflects in Lamp blinking.
Currently My bootstrap capacitor is 1000uF.
I experimented with several values for bootstrap capacitor, Lesser the capacitor value HO missing is more frequent (timing is less then 35 ms) ;
Pl. can any one explain me what mistake I am doing ??
Also can I use this ckt to drive capacitive load ????
Thanks in advance
![12_1158303218.gif](https://obrazki.elektroda.pl/12_1158303218.gif)
pl. find the tipical connection ckt. giiven in IR2110 datasheet
I’m using this typical connection ckt. For driving a Lamp load( two 800w lamps in parallel—total resistance ==2.68 ohm) for my study experiment purpose.
Load supply voltage =300vdc;
I’m using IGBT instead of MOSFET
My switching frequency is 200HZ , 50 % duty cycle (is it too low???)
Hin & Lin pins are shorted just because to turn on & off both IGBTs at same time & for same period ; (is this right ???)
Problem I’ facing:::---
After exactly 35 ms the High side gate drive pulse (HO) is missing for 1 sec., while there is no problem fo LO, this reflects in Lamp blinking.
Currently My bootstrap capacitor is 1000uF.
I experimented with several values for bootstrap capacitor, Lesser the capacitor value HO missing is more frequent (timing is less then 35 ms) ;
Pl. can any one explain me what mistake I am doing ??
Also can I use this ckt to drive capacitive load ????
Thanks in advance