VO3526
Vishay Semiconductors
Power Phototriac
ABSOLUTE MAXIMUM RATING CURVES
80
1.2
1.0
LED Power (mW)
Load Current (A)
0
20
40
60
80
100 120
21502
60
0.8
0.6
0.4
0.2
40
20
0
- 40 - 20
21296
0
- 40 - 20
0
20
40
60
80
100 120
T
A
- Ambient Temperature (°C)
Fig. 1 - Power Dissipation vs. Temperature
Ambient Temperature (°C)
Fig. 2 - Allowable Load Current vs. Ambient Temperature
Note
The allowable load current was calculated out under a given
operating conditions and only for reference:
LED power: Q
E
= 0.015 W,
θ
BA
(4-layer) = 30 °C/W
THERMAL CHARACTERISTICS
PARAMETER
Maximum LED
junction temperature
Maximum NOT
junction temperature
Thermal resistance,
junction NOT to bord
Thermal resistance,
junction NOT to case
Thermal resistance,
junction OT to board
Thermal resistance,
junction OT to case
Thermal resistance,
junction emitter to board
Thermal resistance,
junction emitter to case
Thermal resistance,
junction NOT to junction OT
Thermal resistance,
junction emitter to junction NOT
Thermal resistance,
junction emitter to junction OT
Thermal resistance,
case to ambient
SYMBOL
T
jmax.
T
jmax.
θ
NOT-B
θ
NOT-C
θ
OT-B
θ
OT-C
θ
E-B
θ
E-C
θ
NOT-OT
θ
E-NOT
θ
E-OT
θ
CA
VALUE
105
105
75
150
158
157
149
161
243
420
235
130
UNIT
°C
T
B
θ
NOT-B
T
CASE
T
CASE
T
B
θ
OT-B
θ
NOT-C
θ
OT-C
θ
Q
NOT NOT-OT
Q
OT
°C
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
21295
T
NOT
T
OT
Power Triac
Thermal Model
T
B
T
CASE
θ
E-NOT
Q
E
θ
E-B
T
B
T
E
θ
E-OT
θ
E-C
T
CASE
θ
BA
T
A
θ
CA
Thermal Model
NOT:
OT:
T
B
:
T
A
:
θ
BA
:
Q
E
:
Q
OT
:
Q
NOT
:
Non-opto-triac
Opto-triac
Board temperature
Ambient temperature
Thermal resistance, board to ambient
LED power dissipation
OT power dissipation
NOT power dissipation
T
CASE
: Case temperature
Note
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.
www.vishay.com
2
For technical questions, contact: optocoupler.answers@vishay.com
Document Number: 81842
Rev. 1.2, 23-Oct-08
VISHAY [ VISHAY TELEFUNKEN ]
