HDSP-2301 HP [Agilent(Hewlett-Packard)], HDSP-2301 Datasheet - Page 41

• Manufacturer Part Number: HDSP-2301
• Description: Four Character 5.0 mm (0.20 inch) 5 x 7 Alphanumeric Displays
• Manufacturer: HP [Agilent(Hewlett-Packard)]

Figure 28. Multiline HDSP-2000 Heat Sink
Figure 29. Thermal Resistance Model for Multiline HDSP-2000 Heat Sink
The effectiveness of this type of
heatsink can be determined by
calculating the thermal resistance
of each section of bar under
each display
where
L = length of bar under each
K = thermal conductivity of bar,
a = cross sectional area of bar,
If the displays are mounted in a
strip socket such as the Robinson
Nugent SB-25-100-G socket, then
the bar cross sectional area could
display, mm
W/mm C (0.3937 W/mm C
for copper)
mm
Ka
CROSS SECTION
L
2
PRINTED
CIRCUIT BOARD
VIEW
COPPER BAR
SIP SOCKET
HDSP-2000
DISPLAY
W
/ 2
JC
P D
( )
27
JC
P D
be 6.35 mm (0.25") thick times
the row-to-row pin spacing of the
display minus 2.54 mm (.10").
Thus,
shown below:
HDSP-2000 Family
HDSP-2300 Family
HDSP-2490 Family
T
JC
HDSP-2000 DISPLAYS
STRADDLE COPPER BAR
P D
can be calculated as
1.40 C/W
2.13 C/W
1.12 C/W
( .
( .
( .
0 3937
0 3937
0 3937
JC
a = WT
P D
= L
Ka
W mm C
W mm C
W mm C
JC
/
/
/
P D
L
17.8 mm
2
35.6 mm
0 3
JC
) ( .
) ( .
) ( .
.
P D
6 35
6 35
mm
6 35
JC
mm
mm
mm
P D
The T
for a 32 character HDSP-2000 dis-
play with a copper bar mounted
under the row of displays for an
ambient temperature of 85 C
) ( .
33
) ( .
) ( .
12 7
5 08
3 81
JC
P D
C
mm
mm
mm
and T
AN1016.29
/ 2
)
)
)
HEAT CONDUCTED
FROM ENDS OF PLATE
TO HEAT SINK OR METAL
PANEL
J
can be calculated
MOUNTING
HOLES
MILLED
SLOTS
(28)
(29)
(30)