TRIACs – The Dirty Details (1/3): Gating, Latching and Holding

Ask not what TRIACs can do for you – ask what you can do for TRIACs …
↓↓↓ Complete description, time index and links below ↓↓↓

This is not an introductory video to TRIACS. It delves deep into the detailed information you’ll find in a TRIAC’s datasheet. This first part covers all parameters in regard to gating, latching and holding. That is how to turn a TRIAC on.

I’ll try to demonstrate the parameters by taking measurements with multimeters and an oscilloscope in a simple TRIAC circuit. Two more parts will cover the remaining characteristics and some practical considerations. In this part

00:00 Intro – short recap (what’s a TRIAC, terminology)
05:26 Rant – about slightly inaccurate info about TRIACs on the web
10:57 Construction – some textbook information about TRIACs
12:57 I(GT), V(GT) – gate trigger/threshold current/voltage
21:49 I(L), I(H) – latching/holding current
26:37 T(j) – junction temperature has a great influence
30:49 Oddity – more current needed to hold than to latch
35:33 Dynamics – gate and terminal currents on the oscilloscope
42:57 t(gt) – gate-controlled turn-on time
45:58 Wrap-up – further parameters to look at

TRIACs – The Dirty Details (2/3): Other Parameters, Limits and Thermal:    • TRIACs – The Dirty Details (2/3): Oth...  
TRIACs – The Dirty Details (3/3): Practical Considerations:    • TRIACs – The Dirty Details (3/3): Pra...  
Tutorials:    • Tutorials  

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