My current problem hitches around the circuit I'm using to manage the power side of things in my boombox-in-progress:
picoUPS-100 12V DC micro UPS system / battery backup system ... **broken link removed**
This guy explains it well:
So... the 15VDC/3A/45W power supply I'm using as the AC/DC source will go straight through to the load... which in my case is an amp that can't actually handle 15VDC. Damn.
I'm wondering if I can put some kind of circuit between the picoUPS and the load/amp to step the voltage down below 14.5VDC (the amp's max) - while also taking into account that a lot of the time the supply will be a 12V SLA battery that does not require regulation.
I was thinking maybe I could use a circuit with the ability to both step up the battery voltage (max of 13-13.5VDC) to 14VDC; and step down the AC/DC supply from 15VDC to 14VDC... dependent on which one is connected...
That's just a thought though. Any ideas from people who actually know what they're doing (unlike me
) would be great. Thanks for any help.
picoUPS-100 12V DC micro UPS system / battery backup system ... **broken link removed**
This guy explains it well:
A brief comment about the picoUPS-100: It can run off 6-18V DC which at first seems pretty flexible. However, it can only charge the battery when supplied with at least 15V. While this may seem reasonable enough, the board does no conversion of its input voltage -- if input voltage is higher than battery voltage, it simply routes the input voltage directly to the UPS output. What this really means is that the devices you run off the UPS need to function with 15V, and they need to be able to handle voltage suddenly dropping to 12V as will happen when the UPS switches to battery power.
So... the 15VDC/3A/45W power supply I'm using as the AC/DC source will go straight through to the load... which in my case is an amp that can't actually handle 15VDC. Damn.
I'm wondering if I can put some kind of circuit between the picoUPS and the load/amp to step the voltage down below 14.5VDC (the amp's max) - while also taking into account that a lot of the time the supply will be a 12V SLA battery that does not require regulation.
I was thinking maybe I could use a circuit with the ability to both step up the battery voltage (max of 13-13.5VDC) to 14VDC; and step down the AC/DC supply from 15VDC to 14VDC... dependent on which one is connected...
That's just a thought though. Any ideas from people who actually know what they're doing (unlike me
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