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參數(shù)資料
| 型號： | MAX9753ETI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 16/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO PWR 2.2W D 28TQFN |
| 標準包裝： | 60 |
| 系列： | DirectDrive® |
| 類型： | D 類 |
| 輸出類型： | 2-通道（立體聲）帶立體聲耳機 |
| 在某負載時最大輸出功率 x 通道數(shù)量： | 2.2W x 2 @ 4 歐姆; 62mW x 2 @ 16 歐姆 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 特點： | 消除爆音，輸入多路復用器，短路和熱保護，關(guān)機 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 28-TQFN-EP（5x5） |
| 封裝/外殼： | 28-WFQFN 裸露焊盤 |
| 包裝： | 管件 |
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Connect all components associated with the charge
pump (C2 and C3) to CPGND. Connect VSS and CPVSS
together at C2. Place the charge-pump capacitors (C1,
C2, and C3) as close to the device as possible. Bypass
HPVDD with 1F to GND. Bypass PVDD with a 0.1F
capacitor and a 100F capacitor to PGND. Place the
bypass capacitors as close to the device as possible.
Use large, low-resistance output traces. Current drawn
from the outputs increases as load impedance
decreases. High-output-trace resistance decreases the
power delivered to the load. For example, when com-
pared to a 0
Ω trace, a 100mΩ trace reduces the power
delivered to a 4
Ω load from 2.1W to 2.0W. Large out-
put, supply, and GND traces allow more heat to move
from the MAX9752/MAX9753/MAX9754 to the air,
reducing the thermal impedance of the system.
The MAX9752/MAX9753/MAX9754 thin QFN packages
feature exposed pads on their undersides. Connect the
exposed pad to GND with a large copper pad and mul-
tiple vias to the ground plane.
Measuring Class D Outputs
with an Analog Analyzer
Filterless Class D amplifiers use the loudspeaker’s coil
inductance to filter out switching energy. Additionally, the
loudspeaker does not respond to the switching frequen-
cy of Class D amplifiers, nor could human ears hear
these frequencies. However, audio analyzers and oscil-
loscopes can detect these signals. On an oscilloscope,
the switching components obscure the audio signal. On
an audio analyzer they overload the input signal, degrad-
ing the measurement from the true audio performance of
the amplifier. A simple RC filter can be used (Figure 13)
to aid in evaluation of Class D amplifiers in the lab. This
circuit provides a single-pole response at 34kHz, with a
minimal insertion loss. More complex designs such as L-
C filters can provide more performance, but must be veri-
fied to ensure they do not add their own distortion
signature to the amplifier’s output.
MAX9752/MAX9753/MAX9754
2.2W, Low-EMI, Stereo, Class D Power Amplifiers
with DirectDrive Headphone Amplifiers
______________________________________________________________________________________
23
47nF
RL
100
Ω
100
Ω
CLASS D
MODULATOR
AND H-BRIDGE
AUDIO
ANALYZER
OUT_+
OUT_-
IN+
IN-
Figure 13. Connecting a Class D Output to an Analog Analyzer
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9753ETI+ | 功能描述:音頻放大器 Integrated Circuits (ICs) 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 |
| MAX9753ETI+T | 功能描述:音頻放大器 Integrated Circuits (ICs) 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 |
| MAX9754ETI+ | 功能描述:音頻放大器 Integrated Circuits (ICs) 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 |
| MAX9754ETI+T | 功能描述:音頻放大器 Integrated Circuits (ICs) 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 |
| MAX9755ETI+ | 功能描述:音頻放大器 Integrated Circuits (ICs) 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 |
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