參數(shù)資料
型號(hào)： STV9936S
廠商： 意法半導(dǎo)體
元件分類： 運(yùn)動(dòng)控制電子
英文描述： 12 ns TRIPLE-CHANNEL HIGH VOLTAGE VIDEO AMPLIFIER
中文描述： 12納秒三通道視頻放大器高壓
文件頁(yè)數(shù)： 9/24頁(yè)
文件大?。?/td> 444K
代理商： STV9936S
STV9553
9/24
7
The total power dissipation is the sum of the static DC and the dynamic dissipation:
P
TOT
= P
STAT
+ P
DYN
.
The static DC power dissipation is approximately:
P
STAT
= V
DD
x I
DD
+ V
CC
x I
CC
The dynamic dissipation is, in the worst case (1 pixel On/ 1 pixel Off pattern):
P
DYN
= 3 V
DD
x C
L
x V
OUT(PP)
x f x K (see Note 6)
where fis the video frequency and K the ratio between the active line and the total horizontal line duration.
POWER DISSIPATION
Example:
for V
DD
= 110V, V
CC
= 12V,
I
DD
= 15mA, I
CC
= 40mA,
V
OUT
= 40 V
PP
, f = 25MHz,
C
L
= 8pF and K = 0.72.
We have:
P
STAT
= 2.13W and P
DYN
= 1.90W
Therefore:
P
TOT
=4.03W.
Note 6:
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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