best way to convert 16v to 12v at 1 amp

[Ryan Kremser]

What is the best way to convert a 16v source to 12v that will be able to
handle a little more than an 1 amp? Thanks in advance

 

[Mark]

"Ryan Kremser" <news@rkremser.endjunk.com> wrote in message
news:4e3bc27f4dba68f55836b500149e19d1@free.teranews.com...

What is the best way to convert a 16v source to 12v that will be able to
handle a little more than an 1 amp? Thanks in advance

Prob find the simplest method is to employ a 7812 voltage regulator

regards

Mark

 

[Carsten Henriksen]

Using a 7812 you will have to use a heat sink since the power of 1A*4V = 4W
An 7812 in a TO220 housing will be able to dissipate around 1W without heat
sink

if it is possible you might consider an LM2675 simple switcher form national

it is very easy to get to work

Best regards
Carsten

"Ryan Kremser" <news@rkremser.endjunk.com> skrev i en meddelelse
news:4e3bc27f4dba68f55836b500149e19d1@free.teranews.com...

What is the best way to convert a 16v source to 12v that will be able to
handle a little more than an 1 amp? Thanks in advance

 

[JeffM]

Using a 7812 you will have to use a heat sink...
Carsten Henriksen

or spread the disipation across more devices...

An old trick to boost the current output of a regulator circuit...
The regulation isn't so tight, but it's so simple.
As the load current from the regulator approaches 1 amp,
the drop across the resistor is enough to start turning on the transistor.

___________________________ _______________
| C\ PNP /E |
| \ / |
| __________ \_____/ |
| | \ | |
| | 1 AMP \ | |
----| REGULATOR >---------------\/\/\--+
| / | 0R5
|__________/ ------- 0.5 ohms
| _____
| / Ś \
| |
|------------- 1uF
|
-------
-----
---

 

[JeffM]

Oops! Wrong polarity on the transistor. Should be:
___________________________ _______________
| C\ NPN _ /E |
| \ /| |
| __________ \_____/ |
| | \ | |
| | 1 AMP \ | |
----| REGULATOR >---------------\/\/\--+
| / | 0R5
|__________/ ------- 0.5 ohms
| _____
| / Ś \
| |
|------------- 1uF
|
-------
-----
---