ST7263-EMU2 STMicroelectronics, ST7263-EMU2 Datasheet - Page 94
ST7263-EMU2
Manufacturer Part Number
ST7263-EMU2
Description
MCU, MPU & DSP Development Tools ST7 Emulator Board
Manufacturer
STMicroelectronics
Datasheet
1.ST7263-EMU2.pdf
(109 pages)
Specifications of ST7263-EMU2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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ST7263
7.2 THERMAL CHARACTERISTICS
The average chip-junction temperature, T
grees Celsius, may be calculated using the follow-
ing equation:
Where:
– T
– J
– P
– P
– P
For most applications P
glected. P
figured to drive Darlington bases or sink LED Loads.
Table 25. Thermal Characteristics
(*): Maximum chip dissipation can directly be obtained from T
94/109
Resistance, in C/W,
Watts. This is the Chip Internal Power
and Output Pins; User Determined.
A
D
INT
I/O
A
Symbol
is the Ambient Temperature in C,
is the sum of P
is the Package Junction-to-Ambient Thermal
represents the Power Dissipation on Input
is the product of I
J
A
I/O
T
may be significant if the device is con-
J
= T
A
INT
+ (P
and P
DD and
I/O
D
x J
<P
Package
PSDIP32
I/O
INT
SO34
A
V
) (1)*
,
DD
and may be ne-
, expressed in
J
, in de-
An approximate relationship between P
(if P
Therefore:
Where:
– K is a constant for the particular part, which may
be determined from equation (3) by measuring
P
ue of K, the values of P
by solving equations (1) and (2) iteratively for any
value of T
D
I/O
(at equilibrium) for a known T
K = P
is neglected) is given by:
j
Typical Value
(max),
D
A
P
.
x (T
70
50
D
= K (T
JA
A
+ 273°C) + J
and T
J
D
A
+ 273°C) (2)
and T
parameters.
J
A
may be obtained
A.
x P
Using this val-
D
2
D
°C/W
Unit
and T
(3)
J
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