I'm currently making a buck converter (rated output of 60V/10A) with IR2110 as its high side NMOS driver. The driver and buck converter circuit can be seen in fig 1 and 2. I've asked a bit on this forum for a different problem, here's a link to the post if you want to see it.
Currently, my IR2110 is experiencing heating issues if the buck converter's output voltage is high. Unfortunately I didn't do a systematic testing, but the buck converter is outputting 25V when the IR2110 suddenly heats up to 70 or 80°C.
I stumbled upon this application note about HV floating MOSFET driver, and it says that IR2110 can only be used if the buck converter's output voltage is in between 10 to 20V.
Fig 3. Warning about IR2110 in application note (highlighted in blue) [page23]
But in IR2110's datasheet, it says that the floating output voltage can be up to VB (which is approximately 500V)
Fig 4. Recommended floating output voltage of IR2110 (highlighted in blue) [page 2]
So my questions would be:
- Can the IR2110 be used as a high side driver only (to drive a buck converter with 60V output voltage)?
- If not, should I change my configuration to synchronous? or should I just change the driver circuit? If your suggestion is to change the driver circuit, do you have any suggestion on which the driver I should use?