Constant-current diode: Difference between revisions

Revision as of 06:16, 13 April 2020

Revision as of 17:20, 26 April 2020

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These diodes consist of an n-channel [[JFET]] with the gate shorted to the source, which functions like a two-terminal current limiter or [[current source]] (analogous to a voltage-limiting [[Zener diode]]). They allow a current through them to rise to a certain value, and then level off at a specific value. Unlike Zener diodes, these diodes keep the current constant instead of the voltage constant. These devices keep the current flowing through them unchanged when the voltage changes. An example is the 1N5312. Note the negative ''V''_GS is required, as an example on the n-type junction-gate field-effect transistor 2N5457.

[[Wide-bandgap semiconductor|Wide-bandgap material]] such as [[silicon carbide]] has been used in production devices to enable high-voltage applications in the kilovolt range.<ref>{{cite web |title=CALY Technologies SiC CLD devices |url=https://caly-technologies.com/sic-products/sic-protection-devices/sic-current-limiting-devices-cld |website=[[CALY Technologies]] |accessdate=26 April 2020}}</ref>

Wide Band Gap Material such as Silicon Carbide SiC makes possible the development of Protection Devices in a Minimum Size Solution with Unparalleled Robustness and Performance at voltages as high as 1.7kV like KE17LEB150 SiC CLD.

== References ==

{{reflist}}

==External links==

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* [http://linearsystems.com/lsdata/datasheets/J500_J501_J502_J503_J504_J505_J506_J507_J508_J509_J510_J511_Current_Regulator_Diode.pdf J500 diode datasheet], Linear Systems / Siliconix / Vishay

* [http://centralsemi.com/PDFs/products/1N5283-5314.pdf 1N5283 to 1N5314 diode datasheet], Central Semiconductor

;SiC-CLD

[https://caly-technologies.com/sic-products/sic-protection-devices/sic-current-limiting-devices-cld Silicon Carbide Current Limiting Device CLD, high Energy surge protection], CALY Technologies

;JFET