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參數(shù)資料
| 型號： | SSM2301CPZ-REEL7 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Filterless High Efficiency Mono 1.4 W Class-D Audio Amplifier |
| 中文描述： | 濾波高效單聲道1.4 W功率，D類音頻放大器 |
| 文件頁數(shù)： | 11/19頁 |
| 文件大?。?/td> | 334K |
| 代理商： | SSM2301CPZ-REEL7 |
Preliminary Technical Data
SSM2301
APPLICATION NOTES
OVERVIEW
The SSM2301 mono Class-D audio amplifier features a filterless
modulation scheme that greatly reduces the external components
count, conserving board space and thus reducing systems cost.
The SSM2301 does not require an output filter, but instead relies
on the inherent inductance of the speaker coil and the natural
filtering of the speaker and human ear to fully recover the audio
component of the square-wave output. While most Class-D ampli-
fiers use some variation of pulse-width modulation (PWM), the
SSM2301 uses a Σ-Δ modulation to determine the switching
pattern of the output devices. This provides a number of important
benefits. Σ-Δ modulators do not produces a sharp peak with
many harmonics in the AM frequency band, as pulse-width
modulators often do. Σ-Δ modulation provides the benefits of
reducing the amplitude of spectral components at high frequencies;
that is, reducing EMI emission that might otherwise be radiated
by speakers and long cable traces. The SSM2301 also offers
protection circuits for overcurrent and temperature protection.
GAIN SELECTION
Pulling the GAIN pin high of the SSM2301 sets the gain of the
speaker amplifier to 12 dB; pulling it low sets the gain of the
speaker amplifier to 6 dB.
It is possible to adjust the SSM2301 gain by using external resistors
at the input. To set a gain lower than 12 dB refer to Figure 21 for
differential input configuration and Figure 22 for single-ended
configuration. For external gain configuration from a fixed 12 dB
gain, use the following formula:
External Gain Settings
= 20 log[4/(1 +
R
/150 kΩ)]
To set a gain lower than 6 dB refer to Figure 23 for differential
input configuration and Figure 24 for single-ended configuration.
For external gain configuration from a fixed 6 dB gain, use the
following formula:
External Gain Settings
= 20 log[2/(1 +
R
/150 kΩ)]
POP-AND-CLICK SUPPRESSION
Voltage transients at the output of audio amplifiers can occur when
shutdown is activated or deactivated. Voltage transients as low
as 10 mV can be heard as an audio pop in the speaker. Clicks
and pops can also be classified as undesirable audible transients
generated by the amplifier system, therefore as not coming from
the system input signal. Such transients can be generated when
the amplifier system changes its operating mode. For example, the
following can be sources of audible transients: system power-up/
power-down, mute/unmute, input source change, and sample rate
change. The SSM2301 has a pop-and-click suppression architecture
that reduces these output transients, resulting in noiseless activation
and deactivation.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SSM2301-EVALZ | 制造商:Analog Devices 功能描述:Evaluation Board For Filterless Class-D Audio Amplifier 制造商:Analog Devices 功能描述:EVAL BD - Bulk 制造商:Analog Devices 功能描述:Class-D Audio Amplifier Eval. Board |
| SSM2301-MINI-EVALZ | 功能描述:BOARD EVAL MINI SSM2301 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| SSM2301-MINI-EVALZ | 制造商:Analog Devices 功能描述:Class-D Audio Amplifier Eval. Board |
| SSM2301N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:P-CHANNEL ENHANCEMENT-MODE POWER MOSFET |
| SSM2301RMZ-R2 | 功能描述:IC AMP AUDIO 1.52W MONO D 8MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類型:D 類 輸出類型:1-通道（單聲道），帶立體聲耳機 在某負載時最大輸出功率 x 通道數(shù)量:930mW x 1 @ 8 歐姆; 40mW x 2 @ 16 歐姆 電源電壓:2.7 V ~ 5.5 V 特點:消除爆音，差分輸入，I²C，靜音，關(guān)閉，音量控制 安裝類型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) 其它名稱:MAX97000EWA+T-ND |
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