HCPL-3150-XXXE Просмотр технического описания (PDF) - HP => Agilent Technologies
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HCPL-3150-XXXE Datasheet PDF : 21 Pages
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17
Thermal Model Dual-
Channel (SOIC-16)
HCPL-315J Optoisolator
Definitions
θ1, θ2, θ3, θ4, θ5, θ6, θ7, θ8, θ9,
θ10: Thermal impedances
between nodes as shown in
Figure 28b. Ambient
Temperature: Measured
approximately 1.25 cm above the
optocoupler with no forced air.
LED 1
θ4
DETECTOR 1
θ7
θ8
θ1
LED 2
θ2
θ3
θ5
DETECTOR 2
θ10
θ6
θ9
Description
This thermal model assumes that
a 16-pin dual-channel (SOIC-16)
optocoupler is soldered into an
8.5 cm x 8.1 cm printed circuit
board (PCB). These optocouplers
are hybrid devices with four die:
two LEDs and two detectors. The
temperature at the LED and the
detector of the optocoupler can
be calculated by using the
equations below.
AMBIENT
Figure 28b. Thermal Impedance Model for HCPL-315J.
∆TE1A = A11PE1 + A12PE2+A13PD1+A14PD2
PE1
PD1
∆TE2A = A21PE1 + A22PE2+A23PD1+A24PD2
∆TD1A = A31PE1 + A32PE2+A33PD1+A34PD2
∆TD2A = A41PE1 + A42PE2+A43PD1+A44PD2
PE2
PD2
where:
∆TE1A = Temperature difference between ambient and LED 1
∆TE2A = Temperature difference between ambient and LED 2
∆TD1A = Temperature difference between ambient and detector 1
∆TD2A = Temperature difference between ambient and detector 2
PE1 = Power dissipation from LED 1;
PE2 = Power dissipation from LED 2;
PD1 = Power dissipation from detector 1;
PD2 = Power dissipation from detector 2
Axy thermal coefficient (units in °C/W) is a function of thermal
impedances θ1 through θ10.
Thermal Coefficient Data (units in °C/W)
Part Number A11, A22 A12, A21 A13, A31
HCPL-315J
198
64
62
A24, A42
64
Note: Maximum junction temperature for above part: 125°C.
A14, A41
83
A23, A32
90
A33, A44
137
A34, A43
69
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