Those should work, but the 2.5Ω * 72mA = 180mV drop in the measured battery voltage due to the P-CH's ON-resistance seems a little problematic.Would this P-CH MOSFET 60V 300MA SOT-23 work to switch the cells ? and M3 MOSFET N-CH 60V 0.2A
The voltage divider is to keep the ON Vgs voltage below the typical MOSFET maximum of 20V.Why does M4, M6, M7, M8 not require a voltage divider ?
These cells can be supply max 3A but would not pull that much at anytime so i guess this would be better in terms of lowest voltage drop MOSFET P-CH 30V 3.8A SOT23 it has 65mΩ at 3.8A, 10v.Those should work, but the 2.5Ω * 72mA = 180mV drop in the measured battery voltage due to the P-CH's ON-resistance seems a little problematic.
Suggest you find one with a lower on-resistance, probably one with less than an ohm.
Thank you.The voltage divider is to keep the ON Vgs voltage below the typical MOSFET maximum of 20V.
If the supply voltage to ground is below 20V, then it doesn't need the divider.
Missed that out completely, Thank you for pointing it out.I did notice an error in your schematic.
IC7 has the input accidentally connected to ground instead of the battery voltage.
Much better.i guess this would be better in terms of lowest voltage drop MOSFET P-CH 30V 3.8A SOT23 it has 65mΩ at 3.8A, 10v
by Jake Hertz
by Duane Benson
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by Duane Benson