I am building a 5V DC charger for an offroad motorbike. The main goal is to use this to charge/power a mobile device/phone/tablet whilst travelling/camping. If space allows maybe also a GPS tracker but that's another subject for another day...
The circuit will be powered by the lead acid motorbike battery. With the engine off the battery measures 12.8v. Engine on between 13-14v
The Regulator I have chosen is a SKM10A-05 for a number of reasons (temperature range, heat dissipation, size etc...) but mostly due to the input range due to engine cranking. This also simplifies the design and as a one off i'm not too concerned about price.
To prevent accidental drain of the motorbike battery I want to implement a low voltage cutoff. At around 11v I want to turn off the SKM10A-05 using the R.C. pin:
FUNCTION REMOTE CONTROL;
- Power OFF: R.C. ~ -Vin <1.2Vdc or short
- Power ON: R.C. ~ -Vin >5.5~75Vdc or open circuit
I find plenty of topics for lower voltage applications or charging a battery but so far nothing for this voltage range. Preferably this circuit also needs to not consume much power and be quite robust as the bike gets thrown around alot.
Would really appreciate any help!