ACPL-P484 データシートの表示（PDF） - Broadcom Corporation
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ACPL-P484
Broadcom Corporation
ACPL-P484 Datasheet PDF : 13 Pages
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ACPL-M484/P484/W484
Data Sheet
Thermal Model for ACPL-M484 SO-5
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.
ΔT1: Temperature difference between LED junction and
ambient (°C).
ΔT2: Temperature deference between Detector junction
and ambient.
Ambient Temperature: Junction to Ambient Thermal
Resistances were measured approximately 1.25 cm 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)
Thermal Model for ACPL-P484/W484 SO-6
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.
ΔT1: Temperature difference between LED junction and
ambient (°C).
ΔT2: Temperature deference between Detector junction
and ambient.
Ambient Temperature: Junction to Ambient Thermal
Resistances were measured approximately 1.25 cm above
optocoupler at ~23°C in still air
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
R12, R21
R22
Low K board
High K board
191
77, 91
99
126
26, 35
51
Note: Maximum junction temperature for above parts: 125°C.
JEDEC Specifications
R11
R12, R21
R22
Low K board
High K board
167
64, 81
89
117
31, 39
54
Note: Maximum junction temperature for above parts: 125°C.
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