Hello Everyone,
A few months back i had completed a solar charge controller project,with all of your help ')
But there were a few problems with my circuit,i would like to start rectifying those issues as i am now making another charger with a higher rating.

One major mistake was using the IR2110,as a gate driver(high side and low side).
It was suggested that this was not a suitable gate driver as it is mostly used in induction motor drive systems.
In my new design i would like to use only one N channel mosfet(or a parallel combinations of the mosfet to increase current ratings),on the lower side so that the gate driver has the same ground as a reference as the rest of the circuit.(so that there is no separate charge pump circuit required.)
Could you please suggest me a suitable gate driver,my input to the gate driver would be from a PIC 3.3 to 5v and gate driver output should be 12volts.
I have made a crude hand drawing of what i need if that helps.
View attachment 91596

Thanks in advance,
AK

Facing a similar issue, which one did you chose? I searched the internet an found these two options relevant to my project. GS665MB-EVB
and GDS-2A4S1. Any suggestions?


Mods Note:
Please don't hijack other member's thread, now you have your own.
This thread was split from Gate drivers suggestions.

 

Facing a similar issue, which one did you chose? I searched the internet an found these two options relevant to my project. GS665MB-EVB
and GDS-2A4S1. Any suggestions?


Mods Note:
Please don't hijack other member's thread, now you have your own.
This thread was split from Gate drivers suggestions.

What NFet are you planning to use? Load? Switching frequency?

 

Facing a similar issue, which one did you chose? I searched the internet an found these two options relevant to my project. GS665MB-EVB
and GDS-2A4S1. Any suggestions?

I just made my own gate driver,I ditched the charge-pump topology the IR2110 uses and used an isolated dc/dc converter with an optocoupler as my driver.
Its a little more complicated but more safer to use because of the grounds isolation.
Here is an example circuit.



"Gate1" goes to the gate of the NMOS and floating ground goes to the source of the NMOS.

I tested this up to a switching frequency of 10 KHz, i don't recommend using this for higher frequencies.

Regards,
AK

 

I just made my own gate driver,I ditched the charge-pump topology the IR2110 uses and used an isolated dc/dc converter with an optocoupler as my driver.
Its a little more complicated but more safer to use because of the grounds isolation.
Here is an example circuit.
View attachment 136453
View attachment 136452

"Gate1" goes to the gate of the NMOS and floating ground goes to the source of the NMOS.

I tested this up to a switching frequency of 10 KHz, i don't recommend using this for higher frequencies.

Regards,
AK

The tlp352 datasheet recommends a power supply of 15-30V, which is ok with your using the MEU1S1215Z, but it's not ok to use a 12V zener (D5) at its output. You should change it to a 20V zener, otherwise you'll be shorting your 15V isolated power supply.

That might be the reason why you aren't able to run it at a higher frequency. Up to 50KHz, according to the driver's datasheet.

I'd also suggest placing another 20V zener between pins 5 and 6 of your driver to protect the Nfet's gate.

 

The tlp352 datasheet recommends a power supply of 15-30V, which is ok with your using the MEU1S1215Z, but it's not ok to use a 12V zener (D5) at its output. You should change it to a 20V zener, otherwise you'll be shorting your 15V isolated power supply.

That might be the reason why you aren't able to run it at a higher frequency.

Also, pins 6 and 7 of the TLP352 should be shown as internally connected in your diagram.

Thanks for the reply, D5 is actually an 18v zener,it has not been changed in the circuit.I just drew a rough circuit so that the op would get an idea of what to do.
I used the trial version of orcad to draw out the circuit and could not find a correct footpront for TLP352,so i used a generic one which was present.