14VP-P, Class G Ceramic Speaker Driver _________________________________" />

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參數資料
型號: MAX9788EVKIT+
廠商: Maxim Integrated Products
文件頁數: 11/13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:
MAX9788
14VP-P, Class G Ceramic Speaker Driver
_______________________________________________________________________________________
7
Detailed Description
The MAX9788 Class G power amplifier with inverting
charge pump is the latest in linear amplifier technology.
The Class G output stage offers improved performance
over a Class AB amplifier while increasing efficiency to
extend battery life. The integrated inverting charge
pump generates a negative supply capable of deliver-
ing greater than 700mA.
The Class G output stage and the inverting charge
pump allow the MAX9788 to deliver a 14VP-P voltage
swing, up to two times greater than a traditional single-
supply linear amplifier.
Class G Operation
The MAX9788 Class G amplifier is a linear amplifier that
operates within a low (VCC to GND) and high (VCC to
SVSS) supply range. Figure 1 illustrates the transition
from the low to high supply range. For small signals,
the device operates within the lower (VCC to GND) sup-
ply range. In this range, the operation of the device
is identical to a traditional single-supply Class AB
amplifier where:
ILOAD = IN1
As the output signal increases so a wider supply is need-
ed, the device begins its transition to the higher supply
range (VCC to SVSS) for the large signals. To ensure a
seamless transition between the low and high supply
ranges, both of the lower transistors are on so that:
ILOAD = IN1 + IN2
As the output signal continues to increase, the transi-
tion to the high supply is complete. The device then
operates in the higher supply range, where the opera-
tion of the device is identical to a traditional dual-sup-
ply Class AB amplifier where:
ILOAD = IN2
During operation, the output common-mode voltage of
the MAX9788 adjusts dynamically as the device transi-
tions between supply ranges.
Utilizing a Class G output stage with an inverting
charge pump allows the MAX9788 to realize a 20VP-P
output swing with a 5V supply.
ON
IN1
P
N1
N2
IP
ON
OFF
ZL
VCC
SVSS
LOW SUPPLY RANGE OPERATION
IP = IN1
ON
IN2
P
N1
N2
IP
ON
ZL
VCC
BTL CLASS G SUPPLY TRANSITION
SVSS
SUPPLY TRANSITION
IP = IN1 + IN2
ON
P
N1
N2
IP
OFF
ON
ZL
VCC
SVSS
HIGH SUPPLY RANGE OPERATION
IP = IN2
Figure 1. Class G Supply Transition
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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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