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| 型号： | MAX9701ETG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/22页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 2.2W D 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 类型： | D 类 |
| 输出类型： | 2 通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 2.2W x 2 @ 4 欧姆 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 特点： | 消除爆音，差分输入，短路和热保护，关闭 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 包装： | 管件 |
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 (CIN) set the highpass cutoff
frequency according to the following equation:
where RIN is the typical input resistance of the
MAX9701. The 10μF capacitors on the output of the
MAX9701 ensure a two-pole highpass filter.
f
RC
IN
=
××
1
2
π
MAX9701
1.3W, Filterless, Stereo Class D Audio
Power Amplifier
______________________________________________________________________________________
15
MAX9701
MAX9700
MAX4238
INR+
INL+
INL-
INR-
SYNC
5V
OUTL+
OUTL-
OUTR+
OUTR-
8
Ω
8
Ω
SYNC_OUT
10
μF
10
μF
CIN
2200pF
1
μF
1
μF
5V
NOTE: VALUES SHOWN ARE FOR A LOWPASS CUTOFF OF 2Hz AND A BASS GAIN OF -1V/V.
FFM MODE WITH fOSC = 1100kHz.
OUT+
OUT-
SYNC
IN+
IN-
1.25V
R3
10k
Ω
C2
1nF
R1
20k
Ω
R2
20k
Ω
R4
39k
Ω
C2
0.01
μF
VDD
CIN
2200pF
CIN
2200pF
CIN
2200pF
4
Ω
Figure 8. 2.1 Channel Application Circuit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9701ETG+ | 功能描述:音频放大器 1.3W Filterless Class D Audio Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9701ETG+T | 功能描述:音频放大器 1.3W Filterless Class D Audio Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9701ETG-T | 制造商:Maxim Integrated Products 功能描述:1.3W, FILTERLESS, STEREO CLASS D AUDIO POWER - Tape and Reel |
| MAX9701EUP | 制造商:Maxim Integrated Products 功能描述:1.3W, FILTERLESS, STEREO CLASS D AUDIO POWER - Rail/Tube |
| MAX9701EUP-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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