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參數(shù)資料
| 型號(hào)： | SSM2211-EVAL |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Distortion, 1.5 W Audio Power Amplifier |
| 中文描述： | 低失真，1.5 W音頻功率放大器 |
| 文件頁數(shù)： | 17/24頁 |
| 文件大小： | 408K |
| 代理商： | SSM2211-EVAL |
SSM2211
Rev. D | Page 17 of 24
OUTPUT POWER (W)
0.35
0.30
0
0
0.4
0.1
P
0.2
0.3
0.20
0.15
0.10
0.05
0.25
V
DD
= 5V
R
L
= 4
Ω
R
L
= 8
Ω
R
L
= 16
Ω
0
Figure 45. Power Dissipation vs. Single-Ended Output Power
with V
DD
= 5 V
The maximum power dissipation for a single-ended output is
L
DD
2
π
MAX
DISS
P
R
V
2
,
2
=
(11)
OUTPUT VOLTAGE HEADROOM
The outputs of both amplifiers in the SSM2211 can come to
within 400 mV of either supply rail while driving an 8 Ω load.
As compared to equivalent competitor products, the SSM2211
has a higher output voltage headroom. This means that the
SSM2211 can deliver an equivalent maximum output power
while running from a lower supply voltage. By running at a
lower supply voltage, the internal power dissipation of the
device is reduced, as can be seen in Equation 9. This extended
output headroom, along with the LFCSP package, allows the
SSM2211 to operate in higher ambient temperatures than
competitor devices.
The SSM2211 is also capable of providing amplification even at
supply voltages as low as 2.7 V. The maximum power available at
the output is a function of the supply voltage. Therefore, as the
supply voltage decreases, so does the maximum power output
from the device. The maximum output power vs. supply voltage
at various bridge-tied load resistances is shown in Figure 46. The
maximum output power is defined as the point at which the
output has 1% total harmonic distortion (THD
+
N).
To find the minimum supply voltage needed to achieve a
specified maximum undistorted output power use Figure 46.
For example, an application requires only 500 mW to be
output for an 8 Ω speaker. With the speaker connected in a
bridged-output configuration, the minimum supply voltage
required is 3.3 V.
SUPPLY VOLTAGE (V)
01.5
5.0
2.0
M
O
2.5
3.0
3.5
4.0
4.5
1.6
1.0
0.8
0.4
0.2
1.4
1.2
0.6
RL = 4
Ω
RL = 8
Ω
RL = 16
Ω
0
Figure 46. Maximum Output Power vs. V
SY
Shutdown Feature
The SSM2211 can be put into a low power consumption shut-
down mode by connecting Pin 1 to 5 V. In shutdown mode,
the SSM2211 has an extremely low supply current of less than
10 nA. This makes the SSM2211 ideal for battery-powered
applications.
Connect Pin 1 to ground for normal operation. Connecting Pin 1
to V
DD
mutes the outputs and puts the device into shutdown
mode. A pull-up or pull-down resistor is not required. Pin 1
should always be connected to a fixed potential, either V
DD
or
ground, and never be left floating. Leaving Pin 1 unconnected
can produce unpredictable results.
AUTOMATIC SHUTDOWN-SENSING CIRCUIT
Figure 47 shows a circuit that can be used to take the SSM2211
in and out of shutdown mode automatically. This circuit can
be set to turn the SSM2211 on when an input signal of a certain
amplitude is detected. The circuit also puts the device into low
power shutdown mode if an input signal is not sensed within
a certain amount of time. This can be useful in a variety of
portable radio applications, where power conservation is critical.
SSM2211
V
IN
V
DD
C2
R5
R6
R1
R3
R2
D1
C1
R4
R7
4
V
DD
OP181
A2
+
1
5
R8
A1
–
V
DD
8
NOTE
ADDITIONAL PINS OMITTED FOR CLARITY
0
Figure 47. Automatic Shutdown Circuit
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PDF描述 |
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| SSM2211SZ-REEL1 | Low Distortion, 1.5 W Audio Power Amplifier |
| SSM2211SZ-REEL71 | Low Distortion, 1.5 W Audio Power Amplifier |
| SSM2211CP-R2 | Low Distortion, 1.5 W Audio Power Amplifier |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SSM2211P | 制造商:Rochester Electronics LLC 功能描述:1 WATT AUDIO AMPLIFIER - Bulk |
| SSM2211S | 制造商:Analog Devices 功能描述:Audio Amp Speaker 1-CH Mono Class-AB 8-Pin SOIC N 制造商:Rochester Electronics LLC 功能描述:1 WATT AUDIO AMPLIFIER - Bulk 制造商:Analog Devices 功能描述:IC SM AMP AUDIO POWER 1.5W |
| SSM2211S-REEL | 制造商:Analog Devices 功能描述:Audio Amp Speaker 1-CH Mono Class-AB 8-Pin SOIC N T/R 制造商:Analog Devices 功能描述:IC AMP AUDIO |
| SSM2211S-REEL7 | 制造商:Analog Devices 功能描述:Audio Amp Speaker 1-CH Mono Class-AB 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:1 WATT AUDIO AMPLIFIER - Tape and Reel |
| SSM2211SZ | 功能描述:IC AMP AUDIO PWR 1W MONO 8SOIC RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 標(biāo)準(zhǔn)包裝:80 系列:- 類型:AB 類 輸出類型:1-通道（單聲道） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:1.25W x 1 @ 8 歐姆 電源電壓:2.5 V ~ 5.5 V 特點(diǎn):消除爆音，差分輸入，關(guān)閉，熱保護(hù) 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:8-MSOP-PowerPad 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:管件 配用:296-31419-ND - EVAL MODULE FOR TPA6205A1 其它名稱:296-34563-5TPA6205A1DGN-ND |
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