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参数资料
| 型号： | MAX9759ETE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 3.2W D 16TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 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： | 4.3W x 1 @ 3 欧姆 |
| 电源电压： | 3 V ~ 5.5 V |
| 特点： | 消除爆音，差分输入，静音，短路和热保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 16-TQFN-EP（4x4） |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1392 (CN2011-ZH PDF) |
MAX9759
3.2W, High-Efficiency, Low-EMI,
Filterless, Class D Audio Amplifier
16
______________________________________________________________________________________
Output Filter
The MAX9759 does not require an output filter for the
short speaker cable. The device passes FCC emissions
standards with 7.6cm of unshielded speaker cables.
However, output filtering can be used if a design is fail-
ing radiated emissions due to board layout, cable
length, or the circuit’s close proximity to EMI-sensitive
devices. Use an LC filter when radiated emissions are a
concern, or when long leads are used to connect the
amplifier to the speaker.
Supply Bypassing, Layout, and Grounding
Proper power-supply bypassing ensures low-distortion
operation. For optimum performance, bypass VDD to
GND and PVDD to PGND with separate 0.1F capaci-
tors as close to each pin as possible. A low-imped-
ance, high-current, power-supply connection to PVDD
is assumed. Additional bulk capacitance should be
added as required depending on the application and
power-supply characteristics. GND and PGND should
be star-connected to system ground.
Use wide, low-resistance output traces. As load imped-
ance decreases, the current drawn from the device out-
puts increase. At higher current, the resistance of the
output traces decrease the power delivered to the load.
Wide output, supply, and GND traces also improve the
power dissipation of the device.
The MAX9759 thin QFN package features an exposed
thermal pad on its underside. This pad lowers the
package’s thermal resistance by providing a direct
heat conduction path. Due to the high efficiency of the
MAX9759’s Class D Amplifier, an external heatsink is
not required. For optimum thermal performance, con-
nect the exposed paddle to GND.
Stereo Configuration
Two MAX9759s can be configured as a stereo amplifier
(Figure 7). Device U1 is the master amplifier; its oscilla-
tor output, SYNC_OUT, drives the SYNC input of the
slave device (U2), synchronizing the switching frequen-
cies of the two devices. Synchronizing two MAX9759s
ensures that no beat frequencies within the audio spec-
trum occur on the power-supply rails. This stereo con-
figuration works when the master device is in either
FFM or SSM mode. There is excellent THD+N perfor-
mance and minimal crosstalk between devices due to
the SYNC and SYNC_OUT connection (Figures 8, 9).
Multiple MAX9759s can be cascaded and frequency
locked in a similar fashion (Figure 7). Repeat the stereo
configuration outlined in Figure 7 for multiple cascading
amplifier applications.
Volume Control
If volume control is required, connect a potentiometer
between the differential inputs of the MAX9759, as seen
in Figure 10. In this configuration, each input “sees”
identical RC paths when the device is powered up. The
variable resistive element appears between the two
inputs, meaning the setting affects both inputs the same
way. This configuration significantly improves transient
performance on power-up or release from SHDN.
IN+
MAX9759
IN-
1
F
1
F
CW
22k
50k
22k
Figure 10. Single-Ended Drive of MAX9759 Plus Volume
Control
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9759ETE+ | 功能描述:音频放大器 3.2W 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 |
| MAX9759ETE+T | 功能描述:音频放大器 3.2W 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 |
| MAX9759EUE+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX9759EUE+T | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO 4.3W CLS-D 16TSSOP - Tape and Reel |
| MAX9759EVKIT | 功能描述:音频放大器 Evaluation Kit for the MAX9759 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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