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参数资料
| 型号： | MAX9792AETI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/34页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 3.7W MONO D 28TQFN |
| 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： | 3.7W x 1 @ 3 欧姆; 180mW x 2 @ 32 欧姆 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 特点： | 消除爆音，LDO，短路保护和热保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 28-TQFN-EP（4x4） |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
22
______________________________________________________________________________________
A qualified BEEP signal consists of a 3.3V typical,
215Hz minimum signal that is present at BEEP for four
consecutive cycles. Once the first rising edge transition
is detected at BEEP, the beep circuit wakes up and
begins counting the beep cycles. Once four consecu-
tive cycles of a qualified beep signal are counted, the
device (speaker and headphone amplifiers) enables
within 400s. If the first rising edge is not followed by
three consecutive rising edges within 16ms, the device
remains shutdown (i.e., glitch protection).
The device (speaker and headphone amplifiers) returns
to its programmed logic state once 246ms has elapsed
from the time the last rising edge was detected. This
246ms amplifier hold time ensures complete beep pro-
files are passed to the amplifier outputs (Figure 7).
Ground BEEP when the wake-on-beep feature is not
used. Do not leave BEEP unconnected.
Low-Dropout Linear Regulator
The LDO regulator can be used to provide a clean
power supply to a CODEC or other circuitry. The LDO
can be enabled independently of the audio amplifiers.
Set LDO_EN = AVDD to enable the LDO or set LDO_EN
= GND to disable the LDO. The LDO can provide up to
120mA of continuous current.
Speaker and Headphone Amplifier Enable
The MAX9791/MAX9792 feature control inputs for the
independent enabling of the speaker and headphone
amplifiers, allowing both to be active simultaneously
if required. Driving SPKR_EN high disables the speaker
amplifiers. Driving HP_EN low independently disables
the headphone amplifiers. For applications that
require only one of the amplifiers to be on at a given
time, connect SPKR_EN and HP_EN together, allowing
a single logic voltage to enable either the speaker or
the headphone amplifier as shown in Figure 8.
Shutdown
The MAX9791/MAX9792 feature a low-power shutdown
mode, drawing 3.3A of supply current. By disabling
the speaker, headphone amplifiers, and the LDO, the
MAX9791/MAX9792 enter low-power shutdown mode.
Set SPKR_EN to AVDD and HP_EN and LDO_EN to
GND to disable the speaker amplifiers, headphone
amplifiers, and LDO, respectively.
CROSSTALK vs. FREQUENCY
(HEADPHONE MODE)
FREQUENCY (kHz)
CROSSTALK
(dB)
10
1
0.1
-90
-80
-70
-60
-50
-40
-30
-20
-100
0.01
100
RL = 32
FS = 300mVRMS
VOUT = -20dBFS
LEFT TO RIGHT
COM AND SENSE
RIGHT TO LEFT
COM AND SENSE
LEFT TO RIGHT
COM AND SENSE
DISABLED
RIGHT TO LEFT
COM AND SENSE
DISABLED
Figure 6. MAX9791/MAX9792 COM and SENSE Inputs Reduce
Crosstalk
1
2
3
4
BEEP
SPKR AND HP
AMPS ENABLE
400
s
240ms
16ms
Figure 7. Qualified BEEP Signal Timing
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9792AEVKIT+ | 功能描述:音频放大器 Windows Vista-Compliant Class D Speaker Amplifiers with DirectDrive Headphone Amplifiers 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 |
| MAX9792CETI+ | 功能描述:音频放大器 Windows Vista Class D Speaker Amp 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 |
| MAX9792CETI+T | 功能描述:音频放大器 Windows Vista Class D Speaker Amp 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 |
| MAX9796EBX+TG45 | 功能描述:音频放大器 2.3W High-Power 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 |
| MAX9796EVKIT | 制造商:Maxim Integrated Products 功能描述:2.3W HIGH-POWER CLASS D AUDIO SUBS - Rail/Tube |
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