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參數(shù)資料
| 型號： | TPS9104PT |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | CELLULAR SUBSCRIBER TERMINAL POWER SUPPLY/AUDIO SYSTEM |
| 中文描述： | 移動用戶終端電源/音頻系統(tǒng) |
| 文件頁數(shù)： | 27/33頁 |
| 文件大?。?/td> | 557K |
| 代理商： | TPS9104PT |
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TPS9104
CELLULAR SUBSCRIBER TERMINAL
POWER SUPPLY/AUDIO SYSTEM
SLVS133A – AUGUST 1996 – REVISED APRIL 1998
27
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
THERMAL INFORMATION
Using thermal resistance, junction-to-ambient (R
θ
JA
), maximum power dissipation can be calculated with the
equation:
PD(max)
TJ(max)
TA
RJA
Where T
J(max)
is the maximum allowable junction temperature or 125
°
C.
This limit should then be applied to the internal power dissipation of the TPS9104. The equation for calculating
total internal power dissipation of the TPS9104 is:
PD(max)
x
VI
VX
IX
VI
IQ
Many system-dependent issues such as thermal coupling, airflow, added heat sinks and convection surfaces,
and the presence of other heat-generating components affect the power dissipation limits of a given component.
Three basic approaches for enhancing thermal performance are:
Improving the power dissipation capability of the PWB design
Improving the thermal coupling of the component to the PWB
Introducing airflow in the system
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