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| 型号： | MAX9775EBX+TG45 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/38页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 1.5W STER 36WLP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | DirectDrive® |
| 类型： | D 类 |
| 输出类型： | 2-通道（立体声）带立体声耳机 |
| 在某负载时最大输出功率 x 通道数量： | 1.5W x 2 @ 4 欧姆; 60mW x 2 @ 16 欧姆 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 特点： | 3D，消除爆音，差分输入，I²C，静音，短路和热保护，关机，音量控制 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 36-WLP |
| 封装/外壳： | 36-UFBGA，WLCSP |
| 包装： | 带卷 (TR) |
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MAX9775/MAX9776
2 x 1.5W, Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
______________________________________________________________________________________
19
OUT+
OUT-
VIN-
VIN+
VOUT+ - VOUT-
tON(MIN)
tSW
Detailed Description
The MAX9775/MAX9776 ultra-low-EMI, filterless, Class D
audio power amplifiers feature several improvements to
switch-mode amplifier technology. The MAX9775/
MAX9776 feature active emissions limiting circuitry to
reduce EMI. Zero dead-time technology maintains state-
of-the-art efficiency and THD+N performance by allowing
the output FETs to switch simultaneously without cross-
conduction. A unique filterless modulation scheme and
spread-spectrum modulation create compact, flexible,
low-noise, efficient audio power amplifiers while
occupying minimal board space. The differential input
architecture reduces common-mode noise pickup with or
without the use of input-coupling capacitors. The
MAX9775/MAX9776 can also be configured as single-
ended input amplifiers without performance degradation.
The MAX9775/MAX9776 feature three fully differential
input pairs (INA_, INB_, INC_) that can be configured
as stereo single-ended or mono differential inputs. I2C
provides control for input configuration, volume level,
and mixer configuration. The MAX9775’s 3D enhance-
ment feature widens the stereo sound field to improve
stereo imaging when stereo speakers are placed in
close proximity.
DirectDrive allows the headphone and mono receiver
amplifiers to output ground-referenced signals from a
single supply, eliminating the need for large DC-block-
ing capacitors. Comprehensive click-and-pop suppres-
sion minimizes audible transients during the turn-on
and turn-off of amplifiers.
Class D Speaker Amplifier
Comparators monitor the audio inputs and compare the
complementary input voltages to a sawtooth waveform.
The comparators trip when the input magnitude of the
sawtooth exceeds their corresponding input voltage. The
active emissions limiting circuitry slightly reduces the
turn-on rate of the output H-bridge by slew-rate limiting
the comparator output pulse. Both comparators reset at
a fixed time after the rising edge of the second compara-
tor trip point, generating a minimum-width pulse
(tON(MIN),100ns typ) at the output of the second com-
parator (Figure 1). As the input voltage increases or
decreases, the duration of the pulse at one output
increases while the other output pulse duration remains
the same. This causes the net voltage across the speak-
er (VOUT+ - VOUT-) to change. The minimum-width pulse
helps the devices to achieve high levels of linearity.
Figure 1. Outputs with an Input Signal Applied
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9776EBX+TG45 | 功能描述:音频放大器 2 x 1.5W Stereo Class D Subsystem 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 |
| MAX9776ETJ+ | 功能描述:音频放大器 2 x 1.5W Stereo Class D Subsystem 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 |
| MAX9776ETJ+T | 功能描述:音频放大器 2 x 1.5W Stereo Class D Subsystem 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 |
| MAX9776EVKIT+ | 功能描述:音频 IC 开发工具 MAX9776 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| MAX9777ETI+ | 功能描述:音频放大器 Integrated Circuits (ICs) 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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