HCPL3150300E AVAGO TECH, HCPL3150300E Datasheet - Page 17

• Manufacturer Part Number: HCPL3150300E
• Manufacturer: AVAGO TECH

Thermal Model Dual-
Channel (SOIC-16)
HCPL-315J Optoisolator
Definitions
between nodes as shown in
Figure 28b. Ambient
Temperature: Measured
approximately 1.25 cm above the
optocoupler with no forced air.
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.
Thermal Coefficient Data
Note: Maximum junction temperature for above part: 125 C.
where:
1
10
T
T
T
T
Part Number
,
E1A
E2A
D1A
D2A
: Thermal impedances
HCPL-315J
2
P
P
P
P
A
impedances
,
= A
= A
T
T
T
T
E1
E2
D1
D2
= A
= A
xy
3
E1A
E2A
D1A
D2A
,
thermal coefficient (units in C/W) is a function of thermal
= Power dissipation from LED 1;
= Power dissipation from LED 2;
= Power dissipation from detector 1;
= Power dissipation from detector 2
11
21
31
41
4
= Temperature difference between ambient and LED 1
= Temperature difference between ambient and LED 2
= Temperature difference between ambient and detector 1
= Temperature difference between ambient and detector 2
,
P
P
P
P
E1
E1
E1
E1
5
,
+ A
+ A
+ A
+ A
A
6
1
,
11
198
through
12
22
32
42
, A
7
P
P
,
P
P
E2
E2
22
E2
E2
8
,
+A
+A
+A
+A
A
9
13
23
,
33
43
10
12
64
P
P
P
P
, A
.
D1
D1
D1
D1
(units in C/W)
21
+A
+A
+A
+A
Figure 28b. Thermal Impedance Model for HCPL-315J.
7
14
24
34
44
A
P
P
P
P
DETECTOR 1
13
D2
D2
D2
D2
62
, A
31
LED 1
4
8
A
24
64
, A
P
P
E1
E2
42
2
AMBIENT
10
1
A
14
83
, A
3
41
LED 2
17
A
23
DETECTOR 2
5
9
90
, A
32
P
P
D1
D2
A
33
137
6
, A
44
A
34
69
, A
43