ACPL-P484-560E 데이터 시트보기 (PDF) - Avago Technologies
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ACPL-P484-560E
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ACPL-P484-560E Datasheet PDF : 12 Pages
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Thermal Model for ACPL-M484
SO5 Package Optocoupler
Thermal Model for ACPL-P484/W484
SO6 Package Optocoupler
Definitions
R11: Junction to Ambient Thermal Resistance of LED due
to heating of LED
R12: Junction to Ambient Thermal Resistance of LED due
to heating of Detector (Output IC)
R21: Junction to Ambient Thermal Resistance of Detector
(Output IC) due to heating of LED.
R22: Junction to Ambient Thermal Resistance of Detector
(Output IC) due to heating of Detector (Output IC).
P1: Power dissipation of LED (W).
P2: Power dissipation of Detector / Output IC (W).
T1: Junction temperature of LED (˚C).
T2: Junction temperature of Detector (˚C).
Ta: Ambient temperature.
∆T1: Temperature difference between LED junction and
ambient (˚C).
∆T2: Temperature deference between Detector junction
and ambient.
Ambient Temperature: Junction to Ambient Thermal Re-
sistances were measured approximately 1.25cm above
optocoupler at ~23˚C in still air
Definitions
R11: Junction to Ambient Thermal Resistance of LED due
to heating of LED
R12: Junction to Ambient Thermal Resistance of LED due
to heating of Detector (Output IC)
R21: Junction to Ambient Thermal Resistance of Detector
(Output IC) due to heating of LED.
R22: Junction to Ambient Thermal Resistance of Detector
(Output IC) due to heating of Detector (Output IC).
P1: Power dissipation of LED (W).
P2: Power dissipation of Detector / Output IC (W).
T1: Junction temperature of LED (˚C).
T2: Junction temperature of Detector (˚C).
Ta: Ambient temperature.
∆T1: Temperature difference between LED junction and
ambient (˚C).
∆T2: Temperature deference between Detector junction
and ambient.
Ambient Temperature: Junction to Ambient Thermal Re-
sistances were measured approximately 1.25cm above
optocoupler at ~23˚C in still air
Description
This thermal model assumes that an 5-pin single-channel
plastic package optocoupler is soldered into a 7.62 cm x
7.62 cm printed circuit board (PCB). The temperature at
the LED and Detector junctions of the optocoupler can be
calculated using the equations below.
T1 = (R11 * P1 + R12 * P2) + Ta -- (1)
T2 = (R21 * P1 + R22 * P2) + Ta -- (2)
Description
This thermal model assumes that an 6-pin single-channel
plastic package optocoupler is soldered into a 7.62 cm x
7.62 cm printed circuit board (PCB). The temperature at
the LED and Detector junctions of the optocoupler can be
calculated using the equations below.
T1 = (R11 * P1 + R12 * P2) + Ta -- (1)
T2 = (R21 * P1 + R22 * P2) + Ta -- (2)
Jedec Specifications R11
low K board
191
R12, R21
R22
77, 91
99
high K board
126
26, 35
51
Notes:
1. Maximum junction temperature for above parts: 125 °C.
Jedec Specifications R11
low K board
167
R12, R21
R22
64, 81
89
high K board
117
31, 39
54
Notes:
1. Maximum junction temperature for above parts: 125 °C.
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AV02-2947EN - September 23, 2013
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