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參數(shù)資料
| 型號： | THS4022IDRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
| 封裝： | PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數(shù)： | 8/28頁 |
| 文件大?。?/td> | 922K |
| 代理商： | THS4022IDRG4 |
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P
D +
T
MAX
–T
A
q
JA
TA Free-Air Temperature °C
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
40
20
0
20
40
60
80
100
Maximum
Power
Dissipation
W
G029
DGN Package
θJA = 58.4°C/W
2 oz. Trace And Copper Pad
With Solder
DGN Package
θJA = 158°C/W
2 oz. Trace And
Copper Pad
Without Solder
SOIC Package
High-K Test PCB
θJA = 98°C/W
SOIC Package
Low-K Test PCB
θJA = 167°C/W
TJ = 150°C
SLOS265C – SEPTEMBER 1999 – REVISED JULY 2007
7. Apply solder paste to the exposed thermal pad area and all of the IC terminals.
8. With these preparatory steps in place, the THS402xDGN IC is simply placed in position and run through the
solder reflow operation as any standard surface-mount component. This results in a part that is properly
installed.
The actual thermal performance achieved with the THS402xDGN in its PowerPAD package depends on the
application. In the example above, if the size of the internal ground plane is approximately 3 inches
× 3 inches
(7.62 cm
× 7.62 cm), then the expected thermal coefficient, θ
JA, is about 58.4°C/W. For comparison, the
non-PowerPAD version of the THS402x IC (SOIC) is shown. For a given
θJA, the maximum power dissipation is
shown in Figure 39 and is calculated by the following formula:
where:
PD = Maximum power dissipation of THS402x IC (watts)
TMAX = Absolute maximum junction temperature (150°C)
TA = Free-ambient air temperature (°C)
θJA = θJC + θCA
θJC = Thermal coefficient from junction to case
θCA = Thermal coefficient from case to ambient air (°C/W)
MAXIMUM POWER DISSIPATION
vs
FREE-AIR TEMPERATURE
NOTE: Results are with no air flow and PCB size = 3 in.
× 3 in. (7.62 cm × 7.62 cm).
Figure 39. Maximum Power Dissipation vs Free-Air Temperature
More-complete details of the thermal pad installation process and thermal management techniques can be found
in the PowerPAD Thermally Enhanced Package application report (SLMA002).
16
Copyright 1999–2007, Texas Instruments Incorporated
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