Analyze Electronic Circuits-ST4
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9 terms
Terms | Definitions |
|---|---|
 Whereas the SCR is a "unidirectional" device, a Triac is a ______________ device. | Bi-directional |
| In general, triacs have _________ (higher/lower) current ratings than SCRs. | Lower |
| Name one common application for a Triac. | -Lamp dimming -Domestic range hot plate control -Smaler Motor Speed Control -Applications that do not need high current |
| In some (but not all) Triacs, how is the gate terminal readily identified? | Smaller than the other two leads |
| The voltage drop across a Triac, when conducting rated current, would be closest to: a. 0.7 V b. 1-2 V c. 5 V d 12 V | b. 1-2 V |
| Can a Triac be triggered into conduction without a gate signal? Explain your answer. | Yes. By raising the voltage across the main terminals high enough (breakover), or by a rapid rise in voltage across the main terminal (dv/dt) |
| What is meant by the Triac "holding" current? | Current required to keep the Triac on without the gate signal |
| The action of a Triac could be likened to two _____________ connected back-to-back. | SCRs |
| Triacs are available in rms current rating up to a maximum of about _________ A. | 45 |
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