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參數(shù)資料
| 型號： | MAX9738EWP+TG45 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 13/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO PWR MONO G 20WLP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | G 類 |
| 輸出類型： | 1-通道（單聲道） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 特點： | 消除爆音，差分輸入，關閉 |
| 安裝類型： | 表面貼裝 |
| 供應商設備封裝： | 20-WLP |
| 封裝/外殼： | 20-WFBGA，WLBGA |
| 包裝： | 帶卷 (TR) |
| 配用： | MAX9738EVKIT+-ND - KIT EVALUATION FOR MAX9738 |
MAX9738
16VP-P Class G Amplifier with
Inverting Boost Converter
8
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
A1, A2
VBAT
Battery Connection. Bypass to GND with a 10μF ceramic capacitor.
A3
SHDN
Active-Low Shutdown. Connect to VDD for normal operation.
A4
FB-
Negative Polarity Amplifier Feedback
A5
IN-
Negative Polarity Amplifier Input
B1, B2
LX
Inverting-Boost Inductor Connection. Connect a 1.5μH to 2.2μH inductor between LX and GND.
B4
FB+
Positive Polarity Amplifier Feedback
B5
IN+
Positive Polarity Amplifier Input
C1
BST
Boost Flying Capacitor Connection. Connect a 0.1μF capacitor between BST and LX.
C2, C4
VSS
Class G Amplifier Negative Power-Supply Input. Connect to inverting boost converter output
node. Bypass VBAT with a 10μF ceramic capacitor.
C5
ISET
Boost Current Set. Connect a 100k
Ω resistor from ISET to GND.
D1, D5
VDD
Power-Supply Input. Connect to VBAT.
D2
OUT-
Negative Polarity Amplifier Output
D3
GND
Ground
D4
OUT+
Positive Polarity Amplifier Output
Detailed Description
The MAX9738 Class G power amplifier with inverting
boost converter is the latest in linear amplifier technolo-
gy. The Class G output stage offers improved perfor-
mance over a Class AB amplifier while increasing
efficiency to extend battery life. The integrated inverting
boost converter generates a negative supply capable
of delivering up to 400mA. The negative supply is only
used when the output signal requires a larger supply
voltage differential. As the battery voltage drops, the
boost converter output becomes more negative to
maintain amplifier output swing all the way down to
VBAT = 2.7V.
The Class G output stage and the inverting boost con-
verter allow the MAX9738 to deliver a 16VP-P voltage
swing, up to four times greater than a Class AB amplifier.
Class G Operation
The MAX9738 Class G amplifier is a linear amplifier that
operates within a low (VDD to GND) and high (VDD to
VSS) supply range. Figure 1 illustrates the transition
from the low to high supply range. For small signals,
the device operates within the lower (VDD to GND) sup-
ply range. In this range, the operation of the device is
identical to a traditional single-supply Class AB amplifi-
er where:
ILOAD = IN1
As the output signal increases so a wider supply is
needed, the device begins its transition to the higher
supply range (VDD to VSS) 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 from the higher supply range, where the oper-
ation 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 MAX9738 adjusts dynamically as the device transi-
tions between supply ranges.
Utilizing a Class G output stage with an inverting boost
converter allows the MAX9738 to realize a 17.5VP-P
output swing with a 5V supply. A traditional Class AB
amplifier would need to be powered with a ±5V supply
to generate the same output swing at half the efficiency
of the Class G.
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相關代理商/技術參數(shù) |
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| MAX973C/D | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX973CPA | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX973CPA+ | 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX973CSA | 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MAX973CSA+ | 功能描述:校驗器 IC Dual Comparator / Reference RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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