TVS transient voltage suppressor diode principle is what? And what is the application scope of TVS diode? Some friends still feel strange to them. Today, by the small series for these friends to explain the TVS transient suppression diode principle and its application in the end is how to!
TVs transient voltage suppression diode principle, characteristic of using transient suppression diode (TVS) also known as clamp type diode, is now the throughout the use of a high performance circuit maintenance equipment, its appearance and usually a diode, but can absorb up to several kilowatts of power surge, its main characteristic is in using reverse, when to accept a high energy pulse and its operational impedance immediately fell to an extremely low conduction value, and promised high current after, along with the voltage stress on the reservation level, the echo time is only 10-12 msec. Therefore, it can be effectively maintain the electronic circuit element fine equipment. Application characteristics of TVS transient voltage suppressor diode:
Transient suppression diode (TVS) also known as clamp type diode, is now the throughout the use of a high performance circuit maintenance equipment, its appearance and usually a diode, but can absorb up to several kilowatts of power surge, its main characteristic is in using reverse, when to accept a high energy pulse and its operational impedance immediately fell to an extremely low conduction value, and promised high current after, along with the voltage stress on the reservation level, the echo time is only 10-12 msec. Therefore, it can be effectively maintain the electronic circuit in the fine components and materials. TVS diode promised forward surge current in TA = T, 250C = 10ms conditions, up to 50 ~ 200A. The bidirectional TVS diode can absorb the instantaneous large pulse power in the positive and negative direction, and the voltage stress to the reservation level, the bidirectional TVS diode is suitable for the AC circuit, and the unidirectional TVS diode is normally used for the DC circuit. Can be used for lightning protection, overvoltage protection, anti-jamming, power surge absorption, is an ideal equipment maintenance. Tolerance can be used by Watt (W) to show that.
Application of TVS diode:
Now has been widely used in computer system, communication equipment, AC / DC power supply, cars, electronic ballast, household appliances, instrumentation (meter), RS232/422/423/485, I / O, LAN, ISDN, ADSL, USB, MP3 players, PDAs, GPS, CDMA, GSM, digital camera maintenance, common mode and differential mode maintenance, RF coupling / IC driven maintenance, motor electromagnetic wave interference suppression, audio / video input, sensor / transmission, control circuit, a relay, contactor noise inhibition acceptance etc. in various fields.
The response time of TVS diode can reach PS level, which is the fastest in the voltage limiting surge protection device. When the overvoltage protection of electronic circuit is used, the response speed can meet the requirement. TVS diode junction capacitance according to the different manufacturing process can be roughly divided into two types, high node Capacitance TVS diode in hundreds to thousands of PF magnitude, low junction capacitance type TVs junction capacitance in general a few pf ~ tens pf orders of magnitude. Generally divided into vertical TVS diode junction capacitance is higher, two types of surface mount TVS diode are. In the protection of the high frequency signal line, the TVS diode with low junction capacitance should be mainly used. TVS diode has another advantage is that the flexible use of unidirectional or bidirectional protection devices, in unipolar signal circuit and DC power circuit, the use of one-way TVS diode, you can get a relatively low residual pressure. TVS diode is mainly used for lightning protection of DC power supply, signal lines and antenna lines.