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| 型号： | MAX9796EBX+TG45 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/28页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 2.3W MONO D 36UCSP |
| 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： | 1-通道（单声道），带立体声耳机 |
| 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： | 2.7 V ~ 5.5 V |
| 特点： | 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-UCSP |
| 封装/外壳： | 36-WFBGA，CSBGA |
| 包装： | 带卷 (TR) |
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MAX9796
2.3W, High-Power Class D Audio Subsystem
with DirectDrive Headphone Amplifiers
14
______________________________________________________________________________________
Detailed Description
The MAX9796 ultra-low-EMI, filterless, Class D audio
power amplifier features several improvements to
switch-mode amplifier technology. The MAX9796 fea-
tures 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
a spread-spectrum modulation create a compact, flexi-
ble, low-noise, efficient audio power amplifier while
occupying minimal board space. The differential input
architecture reduces common-mode noise pickup with
or without the use of input-coupling capacitors. The
MAX9796 can also be configured as a single-ended
input amplifier without performance degradation.
The MAX9796 features 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. DirectDrive allows the headphone and
mono receiver amplifiers to output ground-referenced
signals from a single supply, eliminating the need for
large DC-blocking capacitors. Comprehensive click-
and-pop suppression minimizes audible transients dur-
ing 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 lim-
iting the comparator output pulse. Both comparators
reset at a fixed time after the rising edge of the second
comparator trip point, generating a minimum-width
pulse (tON(MIN), 100ns typ) at the output of the second
comparator (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
speaker (VOUT+ - VOUT-) to change. The minimum-
width pulse helps the device to achieve high levels of
linearity.
OUT+
OUT-
VIN-
VIN+
VOUT+ - VOUT-
tON(MIN)
tSW
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 |
|---|---|
| MAX9796EVKIT | 制造商:Maxim Integrated Products 功能描述:2.3W HIGH-POWER CLASS D AUDIO SUBS - Rail/Tube |
| MAX9796EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX9796 EVAL KIT - Boxed Product (Development Kits) |
| MAX98088EVKIT# | 功能描述:音频 IC 开发工具 MAX98088 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 |
| MAX98088EVKIT+ | 功能描述:音频 IC 开发工具 MAX98088 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 |
| MAX98088EWY+T | 功能描述:接口—CODEC Dual I2S Codec RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
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