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參數(shù)資料
| 型號： | APA2030RI-TR |
| 廠商： | Anpec Electronics Corporation |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:8; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| 中文描述： | 立體聲2.6W音頻放大器（增益控制） |
| 文件頁數(shù)： | 22/27頁 |
| 文件大?。?/td> | 746K |
| 代理商： | APA2030RI-TR |
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Copyright
ANPEC Electronics Corp.
Rev. A.2 - Apr., 2004
APA2030/2031
www.anpec.com.tw
22
Efficiency = (7)
SUP
P
Where:
P
O
= =
V
V
O
rms =
(8)
2
Psup = V
DD
* I
DD
AVG
=
L
P
R
2V
π
Efficiency of a BTL configuration:
SUP
O
P
P
= (
L
P
P
2R
V
V
×
) / (V
DD
x
L
P
R
2V
π
)
=
DD
P
4V
V
π
(10)
Table 2 calculates efficiencies for four different output
power levels. Note that the efficiency of the amplifier
is quite low for lower power levels and rises sharply as
power to the load is increased resulting in a nearly flat
internal power dissipation over the normal operating
range. Note that the internal dissipation at full output
power is less than in the half power range. Calculating
the efficiency for a specific system is the key to proper
power supply design. For a stereo 1W audio system
with 8
loads and a 5V supply, the maximum draw
on the power supply is almost 3W.
Po (W)
Efficiency (%)
I
DD
(A)
V
PP
(V)
P
D
(W)
0.25
31.25
0.16
2.00
0.55
0.50
47.62
0.21
2.83
0.55
1.00
66.67
0.30
4.00
0.5
1.25
78.13
0.32
4.47
0.35
**High peak voltages cause the THD to increase.
Table 2. Efficiency Vs Output Power in 5V/8
BTL
Systems
A final point to remember about linear amplifiers (either
SE or BTL) is how to manipulate the terms in the effi-
ciency equation to utmost advantage whenpossible.
Note that in equation, V
is in the dominator. This
indicates that as V
goes down,efficiency goes up. In
other words, use the efficiency analysis to choose the
correct supply voltage and speaker impedance for the
application.
Power Dissipation
Whether the power amplifier is operated in BTL or SE
modes, power dissipation is a major concern. In equa-
tion11 states the maximum power dissipation point
for a SE mode operating at a given supply voltage and
driving a specified load.
SE mode : P
D,MAX
=
L
DD
2
V
π
(11)
In BTL mode operation, the output voltage swing is
doubled as in SE mode. Thus the maximum power
dissipation point for a BTL mode operating at the same
given conditions is 4 times as in SE mode.
BTL mode : P
D,MAX
= (12)
R
2
Since the APA2030/1 is a dual channel power
amplifier, the maximum internal power dissipation is
2 times that both of equations depending on the mode
of operation. Even with this substantial increase in
power dissipation, the APA2030/1 does not require
extra heatsink. The power dissipation from equation12,
assuming a 5V-power supply and an 8
load, must
not be greater than the power dissipation that results
from the equation13:
P
D,MAX
=
(13)
JA
θ
For TSSOP-24 (APA2030) and TSSOP-20 (APA2031)
package with and without thermal pad, the thermal
resistance (
θ
JA
) is equal to 45
o
C/W and 48
o
C/W,
respectively.
Since the maximum junction temperature (T
) of
APA2030/1 is 150
o
C and the ambient temperature (T
)
is defined by the power system design, the maximum
Application Descriptions
2
2
T
L
R
L
P
P
2R
V
V
×
L
2
2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| APA2030RI-TRL | Circular Connector; No. of Contacts:8; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| APA2030RI-TU | Circular Connector; No. of Contacts:8; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| APA2030RI-TUL | Circular Connector; No. of Contacts:23; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| APA2030RI-TY | LJT 23C 21#20 2#16 SKT RECP |
| APA2030RI-TYL | LJT 23C 21#20 2#16 SKT WALL RE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| APA2030RI-TRG | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier (With Gain Control) |
| APA2030RI-TRL | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier(With Gain Control) |
| APA2030RI-TU | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier(With Gain Control) |
| APA2030RI-TUL | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier(With Gain Control) |
| APA2030RI-TY | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier(With Gain Control) |
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