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參數(shù)資料
| 型號： | MAX97200AEVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 12/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | KIT EVALUATION FOR MAX97200 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | DirectDrive® |
| 放大器類型： | G 類 |
| 輸出類型： | 耳機，2-通道（立體聲） |
| 電源電壓： | 1.8V |
| 板類型： | 完全填充 |
| 已用 IC / 零件： | MAX97200A |
| 已供物品： | 板 |
Low-Power, Low-Offset, Dual Mode, Class H
DirectDrive Headphone Amplifier
MAX97200
8
Detailed Description
The MAX97200 is a 45mW Class H headphone ampli-
fier that runs from a single low 1.8V supply voltage
and employs Maxim’s second-generation DirectDrive
technology.
Maxim’s DirectDrive architecture uses an inverting
charge pump to derive a negative voltage supply. The
headphone amplifier is powered between the positive
supply and the generated negative rail. This scheme
allows the audio output signal to be biased about
ground, eliminating the need for large DC blocking
capacitors between the amplifier output and the head-
phone load.
Second-generation DirectDrive technology improves
power consumption when compared to first-generation
DirectDrive amplifiers. The MAX97200 can be powered
from a regulated 1.8V supply and have similar power
consumption to a traditional DirectDrive amplifier that is
powered from 0.9V.
The MAX97200 features a dual-mode internal charge
pump to generate the power rails for the DirectDrive
amplifier. The charge-pump output can be QPVIN/2 or
Q
PVIN depending on the amplitude of the output signal.
When the output voltage is low the power-supply volt-
age is QPVIN/2. When the output signal demands larger
output voltage, the charge pump switches modes so
that a greater power-supply voltage is realized and more
output power can be delivered to the load.
DirectDrive Headphone Amplifier
Traditional single-supply headphone amplifiers have
outputs biased at a nominal DC voltage (typically half
the supply). Large coupling capacitors are needed to
block this DC bias from the headphone. Without these
capacitors, a significant amount of DC current flows to
the headphone, resulting in unnecessary power dis-
sipation and possible damage to both headphone and
headphone amplifier.
Maxim’s second-generation DirectDrive architecture
uses a charge pump to create an internal negative sup-
ply voltage. This allows the headphone outputs of the
MAX97200 to be biased at GND while operating from a
single supply (Figure 1). Without a DC component, there
is no need for the large DC-blocking capacitors. Instead
of two large (220FF typ) capacitors, the MAX97200
charge pump requires 3 small ceramic capacitors, con-
serving board space, reducing cost, and improving the
frequency response of the headphone amplifier.
Figure 1. Traditional Amplifier vs. MAX97200 DirectDrive
Output
VOUT
VDD / 2
GND
VDD
+VDD
GND
-VDD
CONVENTIONAL DRIVER BIASING SCHEME
DirectDrive BIASING SCHEME
VDD
2VDD
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX97200AEVKIT+ | 功能描述:音頻 IC 開發(fā)工具 MAX97200A Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)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 |
| MAX97200AEWC+ | 制造商:Maxim Integrated Products 功能描述:HIGH EFFICIENCY HEADPHONE AMPLIFIER - Rail/Tube |
| MAX97200AEWC+T | 功能描述:音頻放大器 Class H DirectDrive Headphone Amplifier 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX97200BEWC+T | 功能描述:音頻放大器 Class H DirectDrive Headphone Amplifier 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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9720AEBE | 制造商:Maxim Integrated Products 功能描述:50MW, DIRECTDRIVE, STEREO HEADPHONE AMPLIFIER - Rail/Tube |
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