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| 型号： | MAX9702ETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/31页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 1.8W D 28TQFN |
| 标准包装： | 2,500 |
| 系列： | DirectDrive® |
| 类型： | D 类 |
| 输出类型： | 2-通道（立体声）带立体声耳机 |
| 在某负载时最大输出功率 x 通道数量： | 1.8W x 2 @ 4 欧姆; 45mW x 2 @ 32 欧姆 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 特点： | 消除爆音，差分输入，I²C，静音，短路和热保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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Other considerations when designing the input filter
include the constraints of the overall system and the
actual frequency band of interest. Although high-fidelity
audio calls for a flat-gain response between 20Hz and
20kHz, portable voice-reproduction devices such as
cellular phones and two-way radios need only concen-
trate on the frequency range of the spoken human voice
(typically 300Hz to 3.5kHz). In addition, speakers used
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 MAX9702 does not require an output filter. The
device passes FCC emissions standards with 75mm 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 the circuit is
near EMI-sensitive devices. Use a ferrite bead filter
when radiated frequencies above 10MHz are of con-
cern. Use an LC filter when radiated frequencies below
10MHz are of concern, or when long leads (>200mm)
connect the amplifier to the speaker. Figure 13 shows
optional speaker amplifier output filters.
MAX9702
1.8W, Filterless, Stereo, Class D Audio Power
Amplifier and DirectDrive Stereo Headphone Amplifier
______________________________________________________________________________________
25
MAX9702
OUTL+
OUTL-
OUTR+
OUTR-
MAX9702
OUTL+
OUTL-
OUTR+
OUTR-
MAX9702
OUTL+
OUTL-
OUTR+
OUTR-
(a)
TYPICAL APPLICATION
<75mm OF SPEAKER CABLE.
(b)
COMMON-MODE CHOKE FOR
APPLICATIONS USING CABLE LENGTHS
GREATER THAN 75mm.
(c)
LC FILTER WHEN USING CABLE
LENGTHS LONGER THAN 200mm
IN APPLICATIONS THAT ARE
SENSITIVE TO EMI BELOW 10MHz.
100pF
800
AT 100MHz
800
AT 100MHz
100pF
22
0.068
F
0.068
F
0.033
F
0.033
F
0.033
F
0.068
F
15
H
15
H
15
H
15
H
22
22
22
0.15
F
0.068
F
0.033
F
0.15
F
Figure 13. Optional Speaker Amplifier Output Filter
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9702EUI+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH/SPKR 2CH STEREO 1.8W/0.045W CLS-AB/CLS-D 28TSSO - Rail/Tube |
| MAX9702EUI+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH/SPKR 2CH STEREO 1.8W/0.045W CLS-AB/CLS-D 28TSSO - Tape and Reel |
| MAX9702EVCMODU | 功能描述:放大器 IC 开发工具 MAX9702/2B Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX9702EVKIT | 功能描述:放大器 IC 开发工具 MAX9702/2B Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX9703DEVBRD | 功能描述:放大器 IC 开发工具 MAX9703 Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
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