0
\$\begingroup\$

I want to power a device from a battery and be able to plug it in a power source (PC). Will this circuit work?

schematic

simulate this circuit – Schematic created using CircuitLab

\$\endgroup\$
7
  • \$\begingroup\$ electronics.stackexchange.com/questions/261179/… \$\endgroup\$
    – Rohat Kılıç
    Commented Oct 11, 2017 at 12:00
  • 1
    \$\begingroup\$ @VasilKalchev: That is very interesting but why are you telling us this? Do you have a question? Do you have datasheet links to the devices mentioned? \$\endgroup\$
    – Transistor
    Commented Oct 11, 2017 at 12:45
  • \$\begingroup\$ The question got lost in the alt tag of the schematic. I'm asking if it will work. 3.3V LDO voltage regulator, P MOSFET, logic level, TP4056 Li-ion charger, the batteries are 18650 Li-ion. I don't want to use the diode circuit because half the battery won't get used. \$\endgroup\$
    – Vasil Kalchev
    Commented Oct 11, 2017 at 14:43
  • \$\begingroup\$ Whenever you close SW1, you'll be shorting 5V to BAT+ through the body diode of M2. \$\endgroup\$
    – Wesley Lee
    Commented Oct 11, 2017 at 14:55
  • 1
    \$\begingroup\$ The datasheet you linked to says the dropout voltage is ~1-1.2V for the regulator you selected. You might want to consider a different part. \$\endgroup\$
    – Frosty
    Commented Oct 11, 2017 at 20:32

0

Reset to default

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.