A stabilizer (formerly a normistor) is a semiconductor diode in which a direct branch of the current-voltage characteristic is used to stabilize the voltage (that is, in the region of forward bias, the voltage on the stabilizer is weakly dependent on the current). A distinctive feature of stabilizers in comparison with zener diodes is a lower stabilization voltage [1] , which is approximately 0.7 V. The serial connection of two or three stabilizers makes it possible to obtain double or triple the value of the stabilization voltage. Some types of stabilizers are a single set with a series connection of individual elements.
A negative temperature coefficient of resistance is inherent in the stabistors, that is, the voltage at the stabilizer at a constant current decreases with increasing temperature. In this regard, stabilizers are used for temperature compensation of zener diodes with a positive voltage stabilization coefficient.
The bulk of the stabilizers are silicon diodes. In addition to silicon stabilizers, the industry also produces polycrystalline selenium stabilizers, which are distinguished by the simplicity of manufacture, and hence, lower cost. However, selenium stabilizers have a shorter guaranteed service life (1000 h) and a narrow range of operating temperatures.
Content
Stabilizer Examples
- KS107A - U st = 0.7 V
- KS113A - U st = 1.3 V
- KS119A - U st = 1.9 V
- D220C - U st = 0.59 V
- 7GE2A-K - U st = 1.44 V + -10%, in the same series the options are 0.72 and 2.16 V on silicon or selenium (letter K or C) [2] .
See also
- Zener diode
Notes
- ↑ V.V. Pasynkov, L.K. Chirkin Semiconductor Devices: Textbook for High Schools - 4th ed. - M.: Higher School, 1987. - 478 p. silt
- ↑ Museum of Electronic Rare Books - Asset - 7GE2A-K
Literature
- Pasynkov V.V., Chirkin L.K. Semiconductor devices: Textbook for high schools. - 4th ed., Revised. and additional .. - M .: Higher school, 1987. - S. 171-172. - 479 p.