- 您现在的位置：买卖IC网 > PDF目录10341 > MAX9792CETI+ (Maxim Integrated Products)IC AMP AUDIO 2.0W STER D 28TQFN PDF资料下载
参数资料
| 型号： | MAX9792CETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/34页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 2.0W STER D 28TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 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： | 管件 |
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页当前第18页第19页第20页第21页第22页第23页第24页第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
MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
______________________________________________________________________________________
25
Component Selection
Speaker Amplifier Power-Supply Input (PVDD)
PVDD powers the speaker amplifiers. PVDD ranges
from 2.7V to 5.5V. AVDD and PVDD must be tied
together. If LDO is enabled, set AVDD and PVDD as
specified in the Line Regulation row of the
Electrical
Characteristics table. Bypass PVDD with a 0.1F
capacitor to PGND. Apply additional bulk capacitance
at the device if long input traces between PVDD and
the power source are used.
Headphone Amplifier Power-Supply Input
(HPVDD and CPVSS)
The headphone amplifiers are powered from HPVDD
and CPVSS. HPVDD is the positive supply of the head-
phone amplifiers and ranges from 2.7V to 5.5V. Bypass
HPVDD with a 10F capacitor to PGND. CPVSS is the
negative supply of the headphone amplifiers. Bypass
CPVSS with a 1F capacitor to PGND. The charge
pump inverts the voltage at HPVDD, and the resulting
voltage appears at CPVSS. A 1F capacitor should be
connected between C1N and C1P.
Positive Power Supply and LDO Input (AVDD)
The internal LDO and the remainder of the device are
powered by AVDD. AVDD ranges from 2.7V to 5.5V.
AVDD and PVDD must be tied together. If LDO is
enabled, set AVDD and PVDD as specified in LDO line
regulation. Bypass AVDD with a 0.1F capacitor to
GND and two 1F capacitors to GND. Note additional
bulk capacitance is required at the device if long input
traces between AVDD and the power source are used.
Input Filtering
The input capacitor (CIN_), in conjunction with the ampli-
fier input resistance (RIN_), forms a highpass filter that
removes the DC bias from the incoming signal. The AC-
coupling capacitor allows the amplifier to bias the signal
to an optimum DC level. Assuming zero source imped-
ance, the -3dB point of the highpass filter is given by:
RIN_ is the amplifier’s external input resistance value.
Choose CIN_ such that f-3dB is well below the lowest
frequency of interest. Setting f-3dB too high affects
the amplifier’s low frequency response. Use capaci-
tors with adequately low-voltage coefficients (see
Figure 12). Capacitors with higher voltage coeffi-
cients, such as ceramics, result in increased distor-
tion at low frequencies.
Charge-Pump Capacitor Selection
Use capacitors with an ESR less than 100m
for opti-
mum performance. Low ESR ceramic capacitors mini-
mize the output resistance of the charge pump. For
best performance over the extended temperature
range, select capacitors with an X7R dielectric.
Flying Capacitor (C1)
The value of the flying capacitor (C1) affects the load
regulation and output resistance of the charge pump. A
C1 value that is too small degrades the device’s ability
to provide sufficient current drive, which leads to a loss
of output voltage. Connect a 1F capacitor between
C1P and C1N.
f
RC
dB
IN
-3
1
2
=
π
__
INPUT COUPLING CAPACITOR-INDUCED THD+N
vs. FREQUENCY (HEADPHONE MODE)
FREQUENCY (kHz)
THD+N
(dBFS)
100
-90
-80
-70
-60
-50
-100
10
1000
0603 10V X5R 10% 1
F
0805 50V X7R 10% 1
F
VOUT - -3dBFS
FS = 1VRMS
RL =32
0603 10V X7R 10% 1
F
0402 6.3V X5R 10% 1
F
Figure 12. Input Coupling Capacitor-Induced THD+N vs.
Frequency
SPEAKER RF IMMUNITY
vs. FREQUENCY
FREQUENCY (MHz)
AMPLITUDE
(dBV)
2500
2000
1500
1000
500
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-130
0
3000
RIGHT
LEFT
Figure 13. Speaker RF Immunity
相关PDF资料 |
PDF描述 |
|---|---|
| MS27505E11F35SA | CONN RCPT 13POS BOX MNT W/SCKT |
| D38999/26WD97BN | CONN HSG PLUG 12POS STRGHT SCKT |
| LTC1096LCS8#TR | IC ADC 8BIT SERIAL I/O 3V 8SOIC |
| MS3101F10SL-4P | CONN RCPT 2POS FREE HNG W/PINS |
| LTC1199LIMS8 | IC ADC 10BIT 210KHZ W/SD 8-MSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| MAX9796EVKIT+ | 制造商:Maxim Integrated Products 功能描述:MAX9796 EVAL KIT - Boxed Product (Development Kits) |
发布紧急采购，3分钟左右您将得到回复。