Hi,
I have a device that runs on a supply as low as 11.5 V and up to 17 V, which draws up to 17 A, but usually around 2 A.
I have a battery pack which is rated 16.5 V when fully charged and a DC wall adapter that provides 13.5 V.
I would like to be able to plug in the wall adapter while the battery is attached, have this trigger the battery supply to be "switched off" and power the device straight from the wall supply.
I have tried to find solutions online but most of the stuff I've found solves a similar problem but when the auxilliary supply, wall, is at a higher voltage than the primary, battery. These solutions included or'ing diodes and a couple of ICs.
The space that I have to build the circuit in is quite limited so I would like a solution as small as possible. As the device is a primarily a portable battery-powered device, I would like the extra circuitry to not drain too much power and have a little drop over diodes as possible etc. The device start-up time is also about 2 minutes so I would love to be able to plug in and switch the battery, then unplug without the device losing power. But these are things that we would want for most circuits anyway
I like to think that I have a fair bit of electronics knowledge but I'm guessing that compared to people here on the AAC it's very minimal. I am very willing to learn though.
If anyone has either a solution straight away or could point me in the right direction to get started, I'd very much appreciate it.
Thanks for any help in advance,
Glyn.
I have a device that runs on a supply as low as 11.5 V and up to 17 V, which draws up to 17 A, but usually around 2 A.
I have a battery pack which is rated 16.5 V when fully charged and a DC wall adapter that provides 13.5 V.
I would like to be able to plug in the wall adapter while the battery is attached, have this trigger the battery supply to be "switched off" and power the device straight from the wall supply.
I have tried to find solutions online but most of the stuff I've found solves a similar problem but when the auxilliary supply, wall, is at a higher voltage than the primary, battery. These solutions included or'ing diodes and a couple of ICs.
The space that I have to build the circuit in is quite limited so I would like a solution as small as possible. As the device is a primarily a portable battery-powered device, I would like the extra circuitry to not drain too much power and have a little drop over diodes as possible etc. The device start-up time is also about 2 minutes so I would love to be able to plug in and switch the battery, then unplug without the device losing power. But these are things that we would want for most circuits anyway
I like to think that I have a fair bit of electronics knowledge but I'm guessing that compared to people here on the AAC it's very minimal. I am very willing to learn though.
If anyone has either a solution straight away or could point me in the right direction to get started, I'd very much appreciate it.
Thanks for any help in advance,
Glyn.
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