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參數(shù)資料
| 型號(hào)： | TDA9533 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 CHANNEL, VIDEO AMPLIFIER, PZFM15 |
| 封裝： | PLASTIC, MULTIWATT-15 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 248K |
| 代理商： | TDA9533 |
TDA9533
11/16
9 - POWER DISSIPATION
The total power dissipation is the sum of the static
DC and the dynamic dissipation:
PTOT =PSTAT +PDYN.
The static DC power dissipation is approximately:
PSTAT =VDD xIDD +VCC xICC
The dynamic dissipation is, in the worst case (1
pixel On/ 1 pixel Off pattern):
PDYN =3 VDD xCL xVOUT(PP) xf xK
where f is the video frequency and K the ratio be-
tween the active line and the total horizontal line
duration.
Example:
for VDD = 110V, VCC = 12V,
IDD = 25mA, ICC = 60mA,
VOUT =40 VPP, f = 40MHz,
CL = 8pF and K = 0.72.
We have:
PSTAT = 3.47W, PDYN = 3.04W
Therefore:
PTOT = 6.51W.
Note 5: This worst thermal case must only be
considered for TJmax calculation. Nevertheless, during
the average life of the circuit, the conditions are closer to
the white picture conditions.
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