參數資料
型號: MAX9750AETI+
廠商: Maxim Integrated Products
文件頁數: 11/30頁
文件大?。?/td> 0K
描述: IC AMP AUDIO PWR 2.6W AB 28TQFN
標準包裝: 60
系列: DirectDrive®
類型: AB 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 通道數量: 2.6W x 2 @ 3 歐姆; 110mW x 2 @ 16 歐姆
電源電壓: 4.5 V ~ 5.5 V
特點: 消除爆音,短路保護和熱保護,關機,音量控制
安裝類型: 表面貼裝
供應商設備封裝: 28-TQFN-EP(5x5)
封裝/外殼: 28-WFQFN 裸露焊盤
包裝: 管件
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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MAX9750AETI+ 功能描述:音頻放大器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 產品: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
MAX9750AETI+T 功能描述:音頻放大器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 產品: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
MAX9750AEUI+ 功能描述:IC AMP AUDIO PWR 2.6W AB 28TSSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:DirectDrive® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機,2-通道(立體聲) 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C,麥克風,靜音,短路保護,音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP(2.09x2.09) 封裝/外殼:25-WFBGA,WLCSP 包裝:帶卷 (TR)
MAX9750AEUI+T 功能描述:IC AMP AUDIO PWR 2.6W AB 28TSSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:DirectDrive® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:H 類 輸出類型:耳機,2-通道(立體聲) 在某負載時最大輸出功率 x 通道數量:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C,麥克風,靜音,短路保護,音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP(2.09x2.09) 封裝/外殼:25-WFBGA,WLCSP 包裝:帶卷 (TR)
MAX9750AEVKIT 功能描述:放大器 IC 開發(fā)工具 RoHS:否 制造商:International Rectifier 產品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V