for Rev 2 - eliminate the MOSFET gate voltage dividers

MaloufSleep / ME-ESP8266

Malouf Electronics - ESP8266 Dev Board

MIT License

204 stars 5 forks source link

for Rev 2 - eliminate the MOSFET gate voltage dividers #3

Open Tech-TX opened 3 years ago

Tech-TX commented 3 years ago

Swap those 10K pull-downs from the gate of the MOSFETs (4 places) to the GPIO side of the 470 ohm resistors for slightly improved Rds(on). You've created a voltage divider, reducing the gate drive voltage from 3.3V to 3.152V. You get much the same protection at power-up without the loss of drive voltage.

Rds(on) vs Gate-Source voltage change

gramsejrm commented 3 years ago

Thanks for the tip! I'll add that fix in the next revision.