Difference between revisions of "EEHPRT Simple Low-Current Constant-Current Sources"
From 21st Century Products Wiki
| Line 3: | Line 3: | ||
Unfortunately, such a part does not really exist if "small" constant current (<20mA) is desired. Several choices are available, each with its own disadvantages or limitations. | Unfortunately, such a part does not really exist if "small" constant current (<20mA) is desired. Several choices are available, each with its own disadvantages or limitations. | ||
This article primarily relies on components as currently stocked on DigiKey. | |||
https://www.digikey.com/en/products/filter/pmic-current-regulation-management/734 | |||
TODO disclaimer. | |||
=== Available Component Classes === | === Available Component Classes === | ||
==== Constant-Current Diode ==== | ==== Constant-Current Diode ==== | ||
==== LM134/LM234/LM334 ==== | |||
==== LM317L ==== | |||
==== Other Circuits ==== | |||
==== Discrete Circuits ==== | |||
Revision as of 23:32, 17 February 2022
Introduction
Whether driving LEDs or for transducer excitation, a need arises for a simple (ideally, two-leaded part) constant-current source which is simple to use, compact, versatile, adjustable, and has a wide span of current adjustment and excitation voltage supply range.
Unfortunately, such a part does not really exist if "small" constant current (<20mA) is desired. Several choices are available, each with its own disadvantages or limitations.
This article primarily relies on components as currently stocked on DigiKey.
https://www.digikey.com/en/products/filter/pmic-current-regulation-management/734
TODO disclaimer.
