- 您现在的位置：买卖IC网 > PDF目录2091 > MAX9776ETJ+T (Maxim Integrated Products)IC AMP AUDIO PWR 1.5W D 32TQFN PDF资料下载
参数资料
| 型号： | MAX9776ETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/38页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 1.5W D 32TQFN |
| 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： | 1.5W x 1 @ 4 欧姆; 60mW x 2 @ 16 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： | 32-TQFN-EP（5x5） |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 配用： | MAX9776EVKIT+-ND - EVALUATION KIT FOR MAX9776 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页当前第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页
The Global Control Register is used for global configu-
rations, those affecting all inputs and outputs. The bits
in the control register are shown in Table 11.
MAX9775/MAX9776
2 x 1.5W, Stereo Class D Audio Subsystem
with DirectDrive Headphone Amplifier
______________________________________________________________________________________
31
Global Control Register
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
Global Control Register
1
0
1
SHDN
IN+6dB
MUTE
SSM
3D/MONO
Table 10. Global Control Register
BIT
NAME
FUNCTION
B4
SHDN
1 = Normal operation
0 = Low-power shutdown mode. I
2C settings are saved.
B3
IN+6dB
1 = All input signals are boosted by 6dB.
0 = All input signals are passed un-amplified.
This bit does not affect INA if the INA+20dB bit (B4 of the Input Mode Control Register) is set to
1, in which case INA is boosted by 20dB.
B2
MUTE
1 = Mute all outputs.
0 = All outputs are active.
B1
SSM
1 = Spread-spectrum Class D modulation.
0 = Fixed-frequency Class D modulation.
B0
3D/MONO
MAX9775:
1 = 3D Enhancement is on.
0 = 3D Enhancement is off.
1 = Speakers will output L+R in modes 7, 8, 12, and 13 (see Table 9).
0 = Speakers will output L in modes 7, 8, 12, and 13 (see Table 9).
Table 11. Global Control Register Configurations
Applications Information
Class D Filterless Operation
Traditional Class D amplifiers require an output filter to
recover the audio signal from the amplifier’s PWM out-
put. The filters add cost, increase the solution size of
the amplifier, and can decrease efficiency. The tradi-
tional PWM scheme uses large differential output
swings (2 x VDD(P-P)) and causes large ripple currents.
Any parasitic resistance in the filter components results
in a loss of power, lowering the efficiency.
The MAX9775/MAX9776 do not require an output filter.
The device relies on the inherent inductance of the
speaker coil and the natural filtering of both the speak-
er and the human ear to recover the audio component
of the square-wave output. Eliminating the output filter
results in a smaller, less costly, more efficient solution.
Because the switching frequency of the MAX9775/
MAX9776 speaker output is well beyond the bandwidth
of most speakers, voice coil movement due to the
square-wave frequency is very small. Although this move-
ment is small, a speaker not designed to handle the addi-
tional power may be damaged. For optimum results use a
speaker with a series inductance > 10H. Typical 8
Ω
speakers, for portable audio applications, exhibit series
inductances in the 20H to 100H range.
Input Amplifier
Differential Input
The MAX9775/MAX9776 feature a programmable differ-
ential input structure, making it compatible with many
CODECs, and offering improved noise immunity over a
single-ended input amplifier. In devices such as cell
phones, high-frequency signals from the RF transmitter
can be picked up by the amplifier’s input traces. The
signals appear at the amplifier’s inputs as common-
mode noise. A differential input amplifier amplifies the
difference of the two inputs and any signal common to
both is cancelled.
相关PDF资料 |
PDF描述 |
|---|---|
| MAX9778ETI+ | IC AMP AUDIO PWR 2.6W AB 28TQFN |
| MAX9779ETI+T | IC AMP AUDIO PWR 2.6W AB 28TQFN |
| MAX977EEE+ | IC COMPARATOR DUAL 16-QSOP |
| MAX9787ETI+T | IC AMP AUDIO PWR 2.2W AB 28TQFN |
| MAX9788ETI+T | IC AMP AUDIO PWR 2.4W G 28TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX9777ETI+T | 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 |
| MAX9778ETI+ | 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 |
| MAX9778ETI+T | 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 |
发布紧急采购，3分钟左右您将得到回复。