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| 型号： | MAX97200AEWC+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/13页 |
| 文件大小： | 0K |
| 描述： | IC HEADPHONE AMPLIFIER 12WLP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | DirectDrive® |
| 类型： | H 类 |
| 输出类型： | 耳机，2-通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 45mW x 2 @ 16 欧姆 |
| 电源电压： | 1.62 V ~ 1.98 V |
| 特点： | 消除爆音；关闭 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 12-WLP |
| 封装/外壳： | 12-WFBGA，WLCSP |
| 包装： | 标准包装 |
| 其它名称： | MAX97200AEWC+TDKR |
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX97200BEWC+T | 功能描述:音频放大器 Class H DirectDrive Headphone Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9720AEBE | 制造商:Maxim Integrated Products 功能描述:50MW, DIRECTDRIVE, STEREO HEADPHONE AMPLIFIER - Rail/Tube |
| MAX9720AEBE+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP HDPH 2CH STEREO 0.05W CLS-AB 16UCSP - Rail/Tube |
| MAX9720AEBE+T | 功能描述:音频放大器 50mW DirectDrive Headphone Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9720AEBE-T | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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