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參數(shù)資料
| 型號： | TA2020-020 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Stereo 20W (4з) Class-T Digital Audio Amplifier using Digital Power Processing Technology |
| 中文描述： | 立體聲20瓦（4з）類- T數(shù)字音頻放大器采用數(shù)字電源處理技術(shù) |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 293K |
| 代理商： | TA2020-020 |
T E C H N I C A L I N F O R M A T I O N
10 of 13
TA2020-020, Rev. 4.0, 09.00
pin to be pulled up through a large valued resistor (1M
recommended) to V
DD
. To disable SLEEP
mode, the sleep pin should be grounded.
Fault Pin
The FAULT pin is a 5V logic output that indicates various fault conditions within the device. These
conditions include: low supply voltage, low charge pump voltage, low 5V regulator voltage, over
current at any output, and junction temperature greater than approximately 155
°
C. The FAULT
output is capable of directly driving an LED through a series 200
. The FAULT output is capable of
directly driving an LED through a series 200
resistor. If the FAULT pin is connected directly to the
MUTE input an automatic reset will occur in the event of an over-current condition.
Heat Sink Requirements
In some applications it may be necessary to fasten the TA2020-020 to a heat sink. The determining
factor is that the 150
°
C maximum junction temperature, T
J
(max) cannot be exceeded, as specified
by the following equation:
P
DISS
=
(
JA
θ
where…
P
DISS
= maximum power dissipation
T
JMAX
= maximum junction temperature of TA2020-020
T
A
= operating ambient temperature
θ
JC
= junction-to-case thermal resistance of TA2020-020
Example:
What size heat sink is required to operate the TA2020-020 at 20W per channel continuously in a
70oC ambient temperature
P
DISS
is determined by:
P
=
P
P
P
OUT
η
Thus, P
DISS
for two channels = 10W
θ
JA
=
(
P
10
)
A
)
MAX
(
T
T
Efficiency =
η
=
IN
OUT
P
DISS
OUT
OUT
P
P
DISS
(per channel) =
W
5
20
8
0
20
P
OUT
=
=
)
DISS
A
)
MAX
(
T
T
=
70
150
= 8
°
C/W
B
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