OT: 12V DC-DC 2A regulator?

Wouldn't really help. Once a lead acid battery terminal voltage starts to diminish the charge is virtually gone and the with further discharge the voltage falls rapidly. All a DC/DC converter with a 12V source and 12V load would do is run the battery down more quickly than the load alone (as they are not 100% efficient) and then increase the current drawn from the battery as the terminal voltage falls thus hastening its full discharge.

Reply to
Peter Parry
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Looking for a Low Dropout Regulator , LDO , linear ones will go down to within above 0.5V of output, couple of capacitors on in and out to stabalise it and your there. Linear regulators run hot so attach to metal chassis or put in metal box.

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1A 12V LDO available from usual suspects RS Rapid etc

Adam

Reply to
Adam Aglionby

Edit just saw the 2A bit, bit rarer Fairchild: KA278R12

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usual UK suspects dont carry them

Adam

Reply to
Adam Aglionby

The beauty though is that a battery can be float charged while powering a load. The increased charging voltage isn't passed on to the load.

As you say though, the efficiency is reduced (about 85% for many of them).

OTOH, if the OP wants to protectively power a 12v unit from a 12v supply, without the voltage drop lost in a regulator, then this is the only way. Personally, I'd just use a fuse. :-)

Reply to
mick

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