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參數(shù)資料
| 型號： | MAX9762ETI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 10/31頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO PWR 3W MONO 28TQFN |
| 標準包裝： | 60 |
| 類型： | AB 類 |
| 輸出類型： | 1-通道（單聲道），帶立體聲耳機 |
| 在某負載時最大輸出功率 x 通道數(shù)量： | 3W x 1 @ 3 歐姆; 200mW x 2 @ 16 歐姆 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 特點： | 消除爆音，I²C，輸入多路復用器，靜音，關機，熱保護 |
| 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 |
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MAX9760–MAX9763
Stereo 3W Audio Power Amplifiers with
Headphone Drive and Input Mux
18
______________________________________________________________________________________
Read Data Format
In read mode (R/W = 1), the MAX9760/MAX9762 write
the contents of the selected register to the bus. The
direction of the data flow reverses following the
address acknowledge by the MAX9760/MAX9761. The
master device reads the contents of all registers,
including the read-only status register. Table 6 shows
the status register format.
Interrupt Output (
INT)
The MAX9760/MAX9762 include an interrupt output
(INT) that can indicate to a master device that an event
has occurred. INT is triggered when the state of HPS
changes. During normal operation, INT idles high. If a
headphone is inserted/removed from the jack and that
action is detected by HPS, INT pulls the line low. INT
remains low until a read data operation is executed.
I2C Compatibility
The MAX9760/MAX9762 are compatible with existing I2C
systems. SCL and SDA are high-impedance inputs; SDA
has an open drain that pulls the data line low during the
ninth clock pulse. The communication protocol supports
the standard I2C 8-bit communications. The general call
address is ignored. The MAX9760/MAX9762 addresses
are compatible with the 7-bit I2C addressing protocol
only. No 10-bit formats are supported.
Applications Information
BTL Speaker Amplifiers
The MAX9760–MAX9763 feature speaker amplifiers
designed to drive a load differentially, a configuration
referred to as bridge-tied load (BTL). The BTL configu-
ration (Figure 8) offers advantages over the single-
ended configuration, where one side of the load is
connected to ground. Driving the load differentially
doubles the output voltage compared to a single-
ended amplifier under similar conditions. Thus, the
devices’ differential gain is twice the closed-loop gain
of the input amplifier. The effective gain is given by:
Substituting 2 x VOUT(P-P) for VOUT(P-P) into the follow-
ing equations yields four times the output power due to
doubling of the output voltage:
Since the differential outputs are biased at midsupply,
there is no net DC voltage across the load. This elimi-
nates the need for DC-blocking capacitors required for
single-ended amplifiers. These capacitors can be
large, expensive, consume board space, and degrade
low-frequency performance.
V
P
V
R
RMS
OUT P P
OUT
RMS
L
=
()
22
2
A
R
VD
F
IN
=×
2
REGISTER
ADDRESS
0000 0011
BIT
NAME
VALUE
DESCRIPTION
7
X
Don’t Care
—
6
X
Don’t Care
—
5
X
Don’t Care
—
0*
Speaker mode selected
4
SPKR/HP
1
Headphone mode
selected
0*
Gain-setting A selected
3
GAINA/B
1
Gain-setting B selected
0*
Automatic headphone
detection enabled
2
HPS_D
1
Automatic headphone
detection disabled
(HPS ignored).
0*
Input 1 selected
1
IN1/IN2
1
Input 2 selected
0
X
Don’t Care
—
Table 5. Control Register Format
+1
VOUT(P-P)
2 x VOUT(P-P)
VOUT(P-P)
-1
Figure 8. Bridge-Tied Load Configuration
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9762ETI+ | 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 |
| MAX9762ETI+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 |
| MAX9762ETI-T | 功能描述:音頻放大器 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 |
| MAX9762EUI | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9762EUI+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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