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參數(shù)資料
| 型號： | MAX9701 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1.3W, Filterless, Stereo Class D Audio Power Amplifier |
| 中文描述： | 1.3W、無需濾波、立體聲D類音頻功率放大器 |
| 文件頁數(shù)： | 15/21頁 |
| 文件大?。?/td> | 1322K |
| 代理商： | MAX9701 |
in portable devices typically have a poor response
below 300Hz. Taking these two factors into considera-
tion, the input filter may not need to be designed for a
20Hz to 20kHz response, saving both board space and
cost due to the use of smaller capacitors.
Output Filter
The MAX9701 does not require an output filter. The
device passes FCC emissions standards with 76mm of
unshielded speaker cables. However, output filtering
can be used if a design is failing radiated emissions due
to board layout or cable length, or if the circuit is near
EMI-sensitive devices. Use a ferrite bead filter when
radiated frequencies above 10MHz are of concern. Use
an LC filter or a common-mode choke when radiated
emissions below 10MHz are of concern, or when long
leads (>76mm) connect the amplifier to the speaker.
2.1 Channel Configuration
The typical 2.1 channel application circuit (Figure 8)
shows the MAX9701 configured as a mid-/high-frequency
amplifier and the MAX9700 configured as a mono bass
amplifier. Input capacitors (C
IN
) set the highpass cutoff
frequency according to the following equation:
where R
IN
is the typical input resistance of the
MAX9701. The 10μF capacitors on the output of the
MAX9701 ensure a two-pole highpass filter.
f
R
C
IN
IN
=
×
×
1
2
π
M
1.3W, Filterless, Stereo Class D Audio
Power Amplifier
______________________________________________________________________________________
15
MAX9701
MAX9700
MAX4238
INR+
INL+
INL-
INR-
SYNC
5V
OUTL+
OUTL-
OUTR+
OUTR-
8
8
SYNC_OUT
10
μ
F
10
μ
F
C
IN
2200pF
1
μ
F
1
μ
F
5V
NOTE: VALUES SHOWN ARE FOR A LOWPASS CUTOFF OF 2Hz AND A BASS GAIN OF -1V/V.
FFM MODE WITH f
OSC
= 1100kHz.
OUT+
OUT-
SYNC
IN+
IN-
1.25V
R3
10k
C2
1nF
R1
20k
R2
20k
R4
39k
C2
0.01
μ
F
V
DD
C
2200pF
C
IN
2200pF
C
2200pF
4
Figure 8. 2.1 Channel Application Circuit
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9701EBP | 制造商:Maxim Integrated Products 功能描述:1.3W FILTERLESS STEREO CLASS D AU - Rail/Tube |
| MAX9701EBP+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 2CH STEREO 2.2W CLS-D 20UCSP - Rail/Tube |
| MAX9701EBP+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 2CH STEREO 2.2W CLS-D 20UCSP - Tape and Reel |
| MAX9701EBP+TG45 | 功能描述:音頻放大器 1.3W Filterless Class D Audio Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9701EBP-T | 制造商:Maxim Integrated Products 功能描述:1.3W, FILTERLESS, STEREO CLASS D AUDIO POWER - Tape and Reel |
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