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Many 12V-rated devices can datawheet damaged by being exposed to voltages in excess of 12 Volts — particularly LED lights which have a maximum working voltage typically of Nominally 12 Volt Lead acid batteries typically operate in the range of When under charge, the voltage can easily get over 14V — sufficient to cause damage to sensitive 12V equipment.
A voltage regulator is a device lm2944oct takes an input voltage and outputs a stable fixed voltage. Variable voltage regulators are available such as the very useful LMT which the user can set to output any required voltage 1. For the more commonly required voltages of 3.
LM2940 12V 1A Low Dropout Regulator
Unfortunately the regulators mentioned above have quite a high voltage dataeheet — typically up to 3 Volts. To get around this problem low dropout regulators were developed.
A low dropout regulator supplies a fixed output voltage with a typical voltage drop of just 0. This makes them perfect for use with 12 Volt lead acid batteries. Ideally a lead acid battery should never be allowed to get below It can output up to 1 Amp at a fixed 12 Volts DC with a dropout of just 0. It can accept input voltages from 5. When the input voltage is below With a current draw of 0.
If high voltages, or high currents between 0. The LMCT range has internal short circuit and thermal overload protection, so you need to make a special effort to damage one.
Below is a diagram showing the three legs of the LM — one for the input voltage, one for the output voltage, and one for the ground:. In order to maintain a stable 12 Volt output, an external capacitor of at least 22uF must be used to smooth off the output from the integrated circuit ICwith the capacitor located as close to the IC as possible.
LM2940ct 5.0 gets HOT quick.
If you need a 12 Volt voltage regulator to supply more than 1 Amp of current to power an LCD television, laptop, or large amount of lighting, then take a look at our article on the Amperor ADPDC If you need a low dropout voltage regulator which can be adjusted to give a non-standard voltage in the range 5 to 15 Volts DCclick here to read our new article LM 1 Amp Low Dropout Adjustable Regulator.
It runs on 12 Volts and with 1 camera the drain will be about 2 Amps max.
It may help to let others know there is another low drop regulator LTCP this is rated at 5 amps and may be an idea for higher loads. There is also a 3 amp and 7. This is the 12 Volt one I put together.
LM 12V 1A Low Dropout Regulator |
The unit will be on float charge with a 85 Ah battery so being able to have battery backup, but I hope this extra information on the above regulators is of help. Rapid electronics sell the 3 and 7.
Click here to view these low drop out regulators now. Click here now to find out more about or to buy either LT 7.
Voltage Regulators A voltage regulator is a device which takes an input voltage and outputs a stable fixed voltage.