What are the main parameters of the triode?

1. Current amplification factor beta

The current amplification factor is the current magnification, which is used to indicate the amplifying power of the transistor. According to the working state of the triode, the current amplification coefficient is divided into DC amplification factor and AC amplification factor.

The DC magnification coefficient refers to the ratio of the collector current Ic to the base current Ip when the static signal is not transmitted, so it is also called the DC magnification or static amplification factor, which is usually expressed in hFE or beta.

The amplification coefficient of the AC current is also called the dynamic current amplification factor or the AC magnification, which refers to the ratio of the change of the collector current to the base current in the alternating state, and is usually expressed in beta. Beta is an important index to reflect the magnification of the triode.

2. Dissipative power PcM

Dissipative power, also known as collector maximum allowable dissipative power Pom, refers to the maximum collector dissipative power when the triode parameters do not change beyond the prescribed allowable value.

3. Frequency characteristic

The current amplification factor of the triode is related to the working frequency. If the triode exceeds the working frequency range, the magnifying capacity will be reduced and even the amplification will be lost.

4. Collector maximum current IcM

The maximum current of the collector is the maximum current allowed by the collector of the triode. When the collector current Ic rises, the triode's beta decreases. When the beta falls to 2/3 of the normal value, the collector current is IcM.

5. Maximum reverse voltage

The maximum reverse voltage refers to the maximum working voltage allowed by the transistor when it is working. The maximum reverse voltage includes the reverse breakdown voltage of the collector emitter UcBo, the collector base reverse breakdown voltage UcBO, and the emitter base reverse breakdown voltage UEBO.

6. Reverse current

The reverse current of the transistor includes the reverse current IcEo between the collector current base IcBO and the collector emitter.

This article is from Allicdata Electronics Limited.