P
Paul
- Jan 1, 1970
- 0
We plan on placing a +12VDC AC adaptor (110-220AC, which
will plug into
an outlet) in parallel with a battery connector using a "Y" connector,
so that the user can operate our device using either a battery, or the
wall adaptor. ONLY EITHER the battery or the wall adaptor will
be hooked up at any time.
Here is the adaptor we will use:
http://www.cui.com/pdffiles/DPS120100UPS-P5P-SZ.pdf
However, will the impedance of the AC adaptor (when it's
not plugged in) be sufficiently
high enough to make the current draw on the battery insignificant?
Because if the adaptor looks anything like the following:
http://www.coilws.com/images/Switch Mode/1R5W_ckt.gif
Then I'm not worried about the half-wave rectifying diode, but rather
the shunt Zener diode which is only 8.2V.
I'm hoping that the current draw going into the adaptor
will
be insignificant, so that i can wire it in parallel to the battery
connector,
without having to hassle with putting a relay or switch in there.
Maybe i can just solder in a series diode in-line with the
AC adaptor....
will plug into
an outlet) in parallel with a battery connector using a "Y" connector,
so that the user can operate our device using either a battery, or the
wall adaptor. ONLY EITHER the battery or the wall adaptor will
be hooked up at any time.
Here is the adaptor we will use:
http://www.cui.com/pdffiles/DPS120100UPS-P5P-SZ.pdf
However, will the impedance of the AC adaptor (when it's
not plugged in) be sufficiently
high enough to make the current draw on the battery insignificant?
Because if the adaptor looks anything like the following:
http://www.coilws.com/images/Switch Mode/1R5W_ckt.gif
Then I'm not worried about the half-wave rectifying diode, but rather
the shunt Zener diode which is only 8.2V.
I'm hoping that the current draw going into the adaptor
will
be insignificant, so that i can wire it in parallel to the battery
connector,
without having to hassle with putting a relay or switch in there.
Maybe i can just solder in a series diode in-line with the
AC adaptor....