T2800D
Quadrant Definitions for a Triac
MT2 POSITIVE
(Positive Half Cycle)
+
(+) MT2
(+) MT2
Quadrant II
IGT −
(−) IGT
GATE
MT1
REF
(−) MT2
(+) IGT
GATE
MT1
REF
(−) MT2
Quadrant I
+ IGT
Quadrant III
(−) IGT
GATE
MT1
REF
(+) IGT
GATE
MT1
REF
Quadrant IV
−
MT2 NEGATIVE
(Negative Half Cycle)
All polarities are referenced to MT1.
With in−phase signals (using standard AC lines) quadrants I and III are used.
100
95
90
85
80
0
FULL CYCLE
SINUSOIDAL
WAVEFORM
2
4
6
IT(RMS), RMS ON-STATE CURRENT (AMP)
Figure 1. Current Derating
12
10
FULL CYCLE
8
SINUSOIDAL
WAVEFORM
6
MAXIMUM
TYPICAL
4
2
0
8
0
2
4
6
8
10
12
IT(RMS), RMS ON-STATE CURRENT (AMP)
Figure 2. Power Dissipation
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