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参数资料
| 型号： | MAX9705AETB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/18页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 2.3W D 10TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | D 类 |
| 输出类型： | 1-通道（单声道） |
| 在某负载时最大输出功率 x 通道数量： | 2.3W x 1 @ 4 欧姆 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 特点： | 消除爆音，差分输入，短路和热保护，关闭 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | MAX9705AETB+TDKR |
MAX9705
2.3W, Ultra-Low-EMI, Filterless,
Class D Audio Amplifier
10
______________________________________________________________________________________
Spread-Spectrum Modulation (SSM) Mode
The MAX9705 features a unique spread-spectrum mode
that flattens the wideband spectral components, improving
EMI emissions by 5dB. Proprietary techniques ensure that
the cycle-to-cycle variation of the switching period does
not degrade audio reproduction or efficiency (see the
Typical Operating Characteristics). Select SSM mode by
setting SYNC = VDD. In SSM mode, the switching fre-
quency varies randomly by ±120kHz around the center
frequency (1.22MHz). The modulation scheme remains
the same, but the period of the sawtooth waveform
changes from cycle to cycle (Figure 2). Instead of a large
amount of spectral energy present at multiples of the
switching frequency, the energy is now spread over a
bandwidth that increases with frequency. Above a few
megahertz, the wideband spectrum looks like white noise
for EMI purposes (see the
EMI Spectrum Diagram).
External Clock Mode
The SYNC input allows the MAX9705 to be synchronized
to a system clock moving the spectral components of the
switching harmonics to insensitive frequency bands.
Applying an external TTL clock of 800kHz to 2MHz to
SYNC synchronizes the switching frequency of the
MAX9705. The period of the SYNC clock can be ran-
domized, enabling the MAX9705 to be synchronized to
another MAX9705 operating in SSM mode.
Figure 1. MAX9705 Outputs with an Input Signal Applied
OUT+
OUT-
VIN-
VIN+
VOUT+ - VOUT-
tON(MIN)
tSW
SYNC INPUT
MODE
GND
FFM with fS = 1100kHz
VDD
SSM with fS = 1220kHz
±120kHz
Clocked
FFM with fS = external clock frequency
Table 1. Operating Modes
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9705BEBC | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9705BEBC+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX9705BEBC+T | 功能描述:音频放大器 2.3W Ultra-Low-EMI Class D 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 |
| MAX9705BEBC-T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9705BETB+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO 2.3W CLS-D 10TDFN EP - Rail/Tube |
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