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battery to dc wall adapter switch !!

A project log for Multichannel Audio DSP Field Mixer Recorder

bluetooth app controlled professional portable DSP mixer.balanced audio IO,phantom power,flexible routing,ISO recording. timcode. AVB audio.

ben bilesben biles 10/17/2022 at 04:130 Comments

it never ends !! :)

now I need a battery / acdc wall adapter power switch. I'm not charging the V-lock battery's on board as people generally use there own proper chargers.

I also include NTC protection [ edit ,  PTC resettable fuse , not NTC ! ) ]  in case there is ever a short somewhere !!

I'm going to try using the LTC4412 to switch a BSS308 ( P channel mosfet )

more cost and more complexity !

does anyone know of a cheaper simpler way that takes up little pcb space ?

I could just switch the mosfet with the mechanical DC barrel jack switch but seams a bit risky ?

My backplane is already pretty loaded with voltage level monitoring / ADC buffering so I'm making it 4 layer this time and with components will be on both sides. the vsense1 socket will send the buffered 0 - 3.3v voltages to the MC. the digi main board only has 6 ADC channels hooked up at the moment but eventually that will be upgraded to 8 , that way I can monitor battery Vin ( DC vin ) +-15 +-5 48v 3.3v and more

the diode in this example obviously doesn't fit this design !! I'm sure I will find a decent heavy duty

SMD version.

ahhhh , I'll make it all fit , there is always a way ! 

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