VO3526
Power Phototriac
Vishay Semiconductors
ABSOLUTE MAXIMUM RATING CURVES
80
60
40
20
0
1.2
1.0
0.8
0.6
0.4
0.2
0
- 40 - 20
0
20 40 60
80
100 120
- 40 - 20
0
20 40 60 80 100 120
21296
TA - Ambient Temperature (°C)
21502
Ambient Temperature (°C)
Fig. 2 - Allowable Load Current vs. Ambient Temperature
Fig. 1 - Power Dissipation vs. Temperature
Note
The allowable load current was calculated out under a given
operating conditions and only for reference:
LED power: QE = 0.015 W, θBA (4-layer) = 30 °C/W
TCASE
TCASE
THERMAL CHARACTERISTICS
TB
TB
PARAMETER
SYMBOL VALUE
UNIT
Maximum LED
junction temperature
Tjmax.
Tjmax.
θNOT-B
θNOT-C
θOT-B
θOT-C
θE-B
105
105
75
°C
θNOT-C θOT-C
θNOT-B
θOT-B
Maximum NOT
junction temperature
°C
θNOT-OT
QNOT
QOT
Thermal resistance,
junction NOT to bord
TNOT
TOT
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Thermal resistance,
junction NOT to case
Power Triac
Thermal Model
θE-NOT
θE-OT
150
158
157
149
161
243
420
235
130
Thermal resistance,
junction OT to board
TB
TCASE
QE TE
Thermal resistance,
junction OT to case
θE-B
θE-C
θBA
θCA
Thermal resistance,
junction emitter to board
TB
TCASE
Thermal resistance,
junction emitter to case
θE-C
21295
TA
Thermal resistance,
junction NOT to junction OT
θNOT-OT
θE-NOT
θE-OT
θCA
Thermal Model
Thermal resistance,
junction emitter to junction NOT
NOT: Non-opto-triac
OT:
TB:
Opto-triac
Board temperature
Thermal resistance,
junction emitter to junction OT
Thermal resistance,
case to ambient
TCASE: Case temperature
TA:
Ambient temperature
Note
θBA
:
Thermal resistance, board to ambient
LED power dissipation
The thermal model is represented in the thermal network below.
Each resistance value given in this model can be used to calculate
the temperatures at each node for a given operating condition. The
thermal resistance from board to ambient will be dependent on the
type of PCB, layout and thickness of copper traces. For a detailed
explanation of the thermal model, please reference Vishay's
Thermal Characteristics of Power Phototriac application note.
QE:
QOT
:
OT power dissipation
QNOT
:
NOT power dissipation
www.vishay.com
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For technical questions, contact: optocoupler.answers@vishay.com
Document Number: 81842
Rev. 1.2, 23-Oct-08
VISHAY [ VISHAY ]
