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參數資料
| 型號： | MAX9788EVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 12/13頁 |
| 文件大小： | 0K |
| 描述： | EVALUATION KIT FOR MAX9788 |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| 放大器類型： | G 類 |
| 輸出類型： | 1-通道（單聲道） |
| 在某負載時最大輸出功率 x 通道數量： | 2.4W x 1 @ 8 歐姆 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 板類型： | 完全填充 |
| 已用 IC / 零件： | MAX9788 |
| 已供物品： | 板 |
MAX9788
14VP-P, Class G Ceramic Speaker Driver
8
_______________________________________________________________________________________
Inverting Charge Pump
The MAX9788 features an integrated charge pump with an
inverted supply rail that can supply greater than 700mA
over the positive 2.7V to 5.5V supply range. In the case of
the MAX9788, the charge pump generates the negative
supply rail (PVSS) needed to create the higher supply
range, which allows the output of the device to operate
over a greater dynamic range as the battery supply col-
lapses over time.
Shutdown Mode
The MAX9788 has a shutdown mode that reduces
power consumption and extends battery life. Driving
SHDN low places the MAX9788 in a low-power (0.3A)
shutdown mode. Connect SHDN to VCC for normal
operation.
Click-and-Pop Suppression
The MAX9788 Class G amplifier features Maxim’s com-
prehensive, industry-leading click-and-pop suppres-
sion. During startup, the click-and-pop suppression
circuitry eliminates any audible transient sources inter-
nal to the device.
Applications Information
Differential Input Amplifier
The MAX9788 features a differential input configuration,
making the device compatible with many CODECs, and
offering improved noise immunity over a single-ended
input amplifier. In devices such as PCs, noisy digital
signals can be picked up by the amplifier’s input
traces. The signals appear at the amplifier’s inputs as
common-mode noise. A differential input amplifier
amplifies the difference of the two inputs and signals
common to both inputs are canceled out. When config-
ured for differential inputs, the voltage gain of the
MAX9788 is set by:
where AV is the desired voltage gain in dB. RIN+ should
be equal to RIN-, and RFB+ should be equal to RFB-.
The Class G output stage has a fixed gain of 4V/V
(12dB). Any gain or attenuation set by the external
input stage resistors will add to or subtract from this
fixed gain. See Figure 2.
In differential input configurations, the common-mode
rejection ratio (CMRR) is primarily limited by the exter-
nal resistor and capacitor matching. Ideally, to achieve
the highest possible CMRR, the following external com-
ponents should be selected where:
and
CC
IN
+ =
R
FB
IN
FB
IN
+
=
A
R
dB
V
FB
IN
=×
()
20
4
log
_
MAX9788
+
IN+
FB+
RIN+
RIN-
CIN+
CIN-
IN-
FB-
-
CLASS G
OUTPUT
STAGE
RFB+
RFB-
Figure 2. Gain Setting
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX9788EVKIT+ | 功能描述:音頻 IC 開發工具 MAX9788 Eval Kit RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX9788EWP+TG45 | 功能描述:音頻放大器 14VP-P Class G Cer Speaker Driver 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 |
| MAX9789AETJ+ | 功能描述:音頻放大器 Windows Vista Class AB Speaker Amp 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 |
| MAX9789AETJ+C8A | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9789AETJ+T | 功能描述:音頻放大器 Windows Vista Class AB Speaker Amp 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 |
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