LM312 DATASHEET PDF

Posted on 23 февраля, by vgsemenov Справочники по компонентам или datasheets являются необходимейшим элементом при разработке электронных схем. Однако, у них есть одна, но неприятная особенность. Дело в том, что документация на любой электронный компонент например, микросхему всегда должна быть готова еще до того, как эта микросхема начнет выпускаться. В итоге, реально мы имеем ситуацию, когда микросхемы уже поступили в продажу, а еще ни одно изделие на их основе не было создано. А, значит, все рекомендации и особенно схемы приложений, приводимые в datasheets, носят теоретический, рекомендательный характер. Эти схемы в основном демонстрируют принципы работы электронных компонентов, но они не проверены на практике и не должны поэтому слепо приниматься во внимание при разработке.

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This pins adjusts the output voltage 2 The regulated output voltage set by the adjust pin can be obtained from this pin 3 The input voltage which has to be regulated is given to this pin Adjustable 3-terminal positive voltage regulator Output voltage can be set to range from 1. Apart from using it as a variable voltage regulator, it can also be used as a fixed voltage regulator, current limiter, Battery charger, AC voltage regulator and even as an adjustable current regulator.

One notable drawback of this IC is that it has a voltage drop of about 2. So, if you are looking for a variable voltage regulator to deliver current up to 1. It has many application circuits in its datasheet, but this IC is known for being used as a variable voltage regulator. As said earlier the IC has 3 pins, in which the input voltage is supplied to pin3 VIN then using a pair of resistors potential divider we set a voltage at pin 1 Adjust which will decide the output voltage of the IC that is given out at pin 2 VOUT.

Now to make it act as a variable voltage regulator we have to set variable voltages at pin 1 which can be done by using a potentiometer in the potential divider. The below circuit is designed to take 12V you can supply up to 24V as input and regulate it from 1. The Resistor R1 1K and the potentiometer 10k together creates a potential difference at adjust pin which regulates the output pin accordingly.

You can vary the output voltage by simply varying the potentiometer. In our circuit, a motor is connected as a load which consumes around mA you can connect any load up to 1. The same formulae can also be used to calculate the value of resistor for you required output voltage. One easy way to do this is to use this online calculator to randomly substitute the value of resistors you have and check which output voltage you will get. Used for Positive voltage regulations Variable power supply.

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This pins adjusts the output voltage 2 The regulated output voltage set by the adjust pin can be obtained from this pin 3 The input voltage which has to be regulated is given to this pin Adjustable 3-terminal positive voltage regulator Output voltage can be set to range from 1. Apart from using it as a variable voltage regulator, it can also be used as a fixed voltage regulator, current limiter, Battery charger, AC voltage regulator and even as an adjustable current regulator. One notable drawback of this IC is that it has a voltage drop of about 2. So, if you are looking for a variable voltage regulator to deliver current up to 1. It has many application circuits in its datasheet, but this IC is known for being used as a variable voltage regulator.

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LM317 datasheet

The LM relates in the same way to the fixed 79xx regulators. This is the trade-off for using linear regulators which are a simple way to provide a dataheet voltage with few additional components. How the adjustment pin is connected determines datasheeet output voltage as follows. The LM is an adjustable analogue to the popular 78xx fixed regulators. The LM has three pins: In packages with a heat-dissipating mounting tab, such as TOthe tab is connected internally to the output pin which may make it necessary to electrically isolate the tab or the heat sink from other parts of the application circuit. In other projects Wikimedia Commons.

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LM317 Adjustable Regulator Power Supply Circuit calculator, Applications, & datasheet

Схема блока питания обеспечивает регулируемое выходное напряжение от 1,25 до максимума подаваемого входного напряжения, которое не должно быть более 35 вольт. Переменный резистор R1 используется для плавного регулирования выходного напряжения. Резистор R1 точно подобран таким образом, чтобы поддерживать безопасные 5 ампер предельного тока ограничения, которые могут быть получены из цепи. Переменный резистор R8 предназначен для плавной регулировки выходного напряжения Источник питания с цифровым управлением В предыдущей схеме источника питания, для осуществления регулировки напряжения использовался переменный резистор. Ниже приведенная схема позволяет посредством цифрового сигнала подаваемого на базы транзисторов получать необходимые уровни выходного напряжения.

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