參數(shù)資料
型號(hào): TS4956EIKJT
廠商: STMICROELECTRONICS
元件分類: 音頻/視頻放大
英文描述: 1.055 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA18
封裝: ROHS COMPLIANT, FCP-18
文件頁(yè)數(shù): 35/52頁(yè)
文件大?。?/td> 1709K
代理商: TS4956EIKJT
TS4956
Application information
40/51
and the maximum value is obtained when:
and its value is:
Note:
This maximum value depends only on power supply voltage and load values.
The efficiency is the ratio between the output power and the power supply:
The maximum theoretical value is reached when VPEAK = VCC, so
The TS4956 has one active output BTL power amplifier when in modes 1 and 2. In mode 7,
the TS49656 has two active output BTL power amplifiers.
Each amplifier produces heat due to its power dissipation. Therefore the maximum die
temperature is the sum of each amplifier’s maximum power dissipation. It is calculated as
follows:
Pdiss 1 = power dissipation due to the first BTL power amplifier.
Pdiss 2 = power dissipation due to the second BTL power amplifier.
Total Pdiss =Pdiss 1 +Pdiss 2 (W)
In most cases,
Pdiss 1 = Pdiss 2, giving:
P
out
P
diss
0
=
P
diss
MA X
2V
CC
2
π
2
R
L
---------------W
()
=
η
P
out
P
sup ply
-------------------
πV
PEAK
4V
CC
---------------------
==
η
π
4
---
78.5%
==
TotalP
diss
2P
diss1
=
To talP
diss
42VCC
π R
L
---------------------- P
out
2P
ou t
(W)
=
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