Hi All,
I'm developing a lithium ion charging circuit based on TI's BQ24618. After this part of the circuit there is the class D amp itself and the Bluetooth module. If you see the attached image you'll see I've added a switch so that the battery will always charge with an adapter attached but I can still turn the amp on and off.
I want to replace the switch (SW1) with a MOSFET and switch as it's going to be switching a decent amount of power and I want to be able to use a small switch or potentially a microcontroller in the future.
Anyway seems I'm really struggling to get my head round how this works. I was looking at N-Channel MOSFETS but this doesn't seem right as that requires the load (amplifier) to be before the MOSFET on the drain side. Would I use a P Channel MOSFET in this case? What would this circuitry look like?
Any help would be appreciated.
Thanks!
I'm developing a lithium ion charging circuit based on TI's BQ24618. After this part of the circuit there is the class D amp itself and the Bluetooth module. If you see the attached image you'll see I've added a switch so that the battery will always charge with an adapter attached but I can still turn the amp on and off.
I want to replace the switch (SW1) with a MOSFET and switch as it's going to be switching a decent amount of power and I want to be able to use a small switch or potentially a microcontroller in the future.
Anyway seems I'm really struggling to get my head round how this works. I was looking at N-Channel MOSFETS but this doesn't seem right as that requires the load (amplifier) to be before the MOSFET on the drain side. Would I use a P Channel MOSFET in this case? What would this circuitry look like?
Any help would be appreciated.
Thanks!