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参数资料
| 型号： | MAX9750CETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/30页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 2.6W AB 28TQFN |
| 标准包装： | 60 |
| 系列： | DirectDrive® |
| 类型： | AB 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： | 2.2W x 2 @ 3 欧姆; 110mW x 2 @ 16 欧姆 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 特点： | 消除爆音，短路保护和热保护，关机，音量控制 |
| 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： | 管件 |
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MAX9750/MAX9751/MAX9755
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
______________________________________________________________________________________
19
Headphone Amplifier
In conventional single-supply headphone amplifiers,
the output-coupling capacitor is a major contributor of
audible clicks and pops. Upon startup, the amplifier
charges the coupling capacitor to its bias voltage, typi-
cally half the supply. Likewise, during shutdown, the
capacitor is discharged to GND. A DC shift across the
capacitor results, which in turn appears as an audible
transient at the speaker. Since the MAX9750/MAX9751/
MAX9755 do not require output-coupling capacitors, no
audible transient occurs.
Additionally, the MAX9750/MAX9751/MAX9755 features
extensive click-and-pop suppression that eliminates
any audible transient sources internal to the device.
The Turn-On Response (Headphone Mode) and Turn-
Off Response (Headphone Mode) graphs in the
Typical
Operating Characteristics shows that there are minimal
transient components in the audible range at the output
upon startup and shutdown.
Figure 7a. Volume Control Transfer Function
-80
-60
-70
-40
-50
-20
-30
-10
10
0
20
0
1.0
1.5
0.5
2.0
2.5
3.0
3.5
4.0
MAX9750A
VOLUME CONTROL TRANSFER FUNCTION
VVOL (V)
GAIN
(dB)
AUDIO
TAPER POT
GAIN1 = GAIN2 = 0
SPEAKER MODE
HEADPHONE MODE
Figure 7b. Volume Control Transfer Function
-80
-60
-70
-40
-50
-20
-30
-10
10
0
20
0
1.0
1.5
0.5
2.0
2.5
3.0
3.5
4.0
MAX9750B
VOLUME CONTROL TRANSFER FUNCTION
VVOL (V)
GAIN
(dB)
AUDIO
TAPER POT
GAIN1 = GAIN2 = 0
SPEAKER MODE
HEADPHONE MODE
Figure 7c. Volume Control Transfer Function
-80
-60
-70
-40
-50
-20
-30
-10
10
0
20
0
1.0
1.5
0.5
2.0
2.5
3.0
3.5
4.0
MAX9750C
VOLUME CONTROL TRANSFER FUNCTION
VVOL (V)
GAIN
(dB)
AUDIO
TAPER POT
GAIN1 = GAIN2 = 0
SPEAKER MODE
HEADPHONE MODE
MAX9750
RB3
47k
Ω
BEEP
0.47
μF
SOURCE 3
RB2
47k
Ω
0.47
μF
SOURCE 2
RB1
47k
Ω
0.47
μF
SOURCE 1
RINT
47k
Ω
BIAS
WINDOW
DETECTOR
(0.8VP-P THRESHOLD)
SPEAKER/HEADPHONE
AMPLIFER INPUTS
VOUT(BEEP)
FREQUENCY
DETECTOR
(300Hz THRESHOLD)
Figure 8. BEEP Input
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9750CETI+ | 功能描述:音频放大器 Integrated Circuits (ICs) 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 |
| MAX9750CETI+C2U | 功能描述:音频放大器 Integrated Circuits (ICs) 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 |
| MAX9750CETI+T | 功能描述:音频放大器 Integrated Circuits (ICs) 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 |
| MAX9750CEUI | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9751ETI+ | 功能描述:音频放大器 Integrated Circuits (ICs) 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 |
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