men8ifr
Newbie level 3
Can any-one recommend a 3 pin current regulator with low voltage drop between input and output voltages?
This is to charge a car lead acid battery from a cigarette lighter as fast as possible so would like to use the 20A available from the cigarette lighter.
I have a LM317 however this has a ~2v drop so if vehicle voltage is 14.5 max charging voltage is 12.5 so this leaves a lot of capacity in the battery after charging.
If a 3 pin regulator had less that 1v drop that would be great but I'm struggling to find anything to accept max 16v high current and low voltage drop input to output. ...
Or does the simple solution I'm after not exist and I need something more complex like this proposed circuit - problem is it will be difficult for me to get hold of these components and difficult to build (in comparison).
**broken link removed**
This is to charge a car lead acid battery from a cigarette lighter as fast as possible so would like to use the 20A available from the cigarette lighter.
I have a LM317 however this has a ~2v drop so if vehicle voltage is 14.5 max charging voltage is 12.5 so this leaves a lot of capacity in the battery after charging.
If a 3 pin regulator had less that 1v drop that would be great but I'm struggling to find anything to accept max 16v high current and low voltage drop input to output. ...
Or does the simple solution I'm after not exist and I need something more complex like this proposed circuit - problem is it will be difficult for me to get hold of these components and difficult to build (in comparison).
**broken link removed**