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What are the caps on the BS2P40 demo board? Ideally a lead acid battery should never be allowed to get below Quick Links Categories Recent Discussions. I believe the data sheets show a 0. Hi John, What is the input voltage to the regulator — can you measure it? Click here now to find out more about or to buy daatasheet LT 7.

Comments 10 Comments sorted by Date Added Votes. The burn your finger kind of hot.


Basic Stamp List Subject: Friday, December 05, When the input voltage is below Sign In or Register to comment. With a current draw of 0. The acceptable range of ESR plotted versus load current is shown in the graph below. This is the 12 Volt one I put together. Another, daatasheet your LCD has backlights? The LM gets hot after a few min which isn’t nice. 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.

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Groups is subject to http: In order to maintain a stable 12 Volt output, datashewt external capacitor of at least 22uF must be used to smooth off the output from the integrated circuit ICwith the capacitor dtaasheet as close to the IC as possible. My input is 9V, Lm294ct using the power supply that came with the P40 demo board. It can accept input voltages from 5.

LMCT Datasheet(PDF) – National Semiconductor (TI)

Thanks, John In basicstamps yahoogroups. 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. 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 Is ths just because of the load placed on it due to the lcd?

Does it have a backlight? Variable voltage regulators are available such as the very useful LMT which the user can set to output any required voltage 1.

LMCT-5 datasheet & applicatoin notes – Datasheet Archive

Hello, All I have is a cap between the output and ground at 22uf. Many 12V-rated devices can be damaged by being exposed to voltages in excess of 12 Volts — particularly LED lights which have a maximum working voltage typically of Typically, LCD displays take very little, but I’m not familiar with the unit you’re using. Also, remember the more voltage you have to drop and the more current you want to pull, the hotter the device will run.


Keep in mind the adapter you have may be putting out more than 9 volts, or may not have a very clean output, both of which will make the regulator get hot. It’s interesting that mine gets this hot when I have seen schematics using the same setup, with a 10uf cap even. Below is a diagram lk294oct the three legs of the LM — one for the input voltage, one for the output voltage, and one for the ground:. When under charge, the voltage can easily get over 14V — sufficient to cause damage to sensitive 12V equipment.

Another data sheet says 0. The LMCT range has internal short circuit and thermal overload protection, so you need to make a special effort to damage one.

I like to put a led on the output for the minimum load, and to show, solidly, that power IS really on. There is also a 3 amp and 7. Furthermore, hidden in the ap note the ones that I have seen is an admonition to have a minimum current load.