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参数资料
| 型号： | MAX9742ETX+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 32/36页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 20.5W D 36TQFN |
| 标准包装： | 50 |
| 类型： | D 类 |
| 输出类型： | 2 通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 20.5W x 2 @ 8 欧姆 |
| 电源电压： | 20 V ~ 40 V，±10 V ~ 20 V |
| 特点： | 消除爆音，差分输入，静音，短路和热保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 36-TQFN 裸露焊盘（6x6） |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 包装： | 管件 |
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MAX9742
Single-/Dual-Supply, Stereo 16W,
Class D Amplifier with Differential Inputs
_______________________________________________________________________________________
5
Note 2: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 3: Supply pumping may occur at high output powers with low audio frequencies. Use proper supply bypassing to prevent the
device from entering overvoltage protection due to supply pumping. See the
Supply Pumping Effects and the Supply
Undervoltage and Overvoltage Protection sections.
Note 4: Amplifier inputs AC-coupled to ground.
Note 5: For RL = 4, LF = 22H and CF = 0.68F. For RL = 6, LF = 33H and CF = 0.47F. For RL = 8, LF = 47H and CF =
0.33F.
Note 6: Testing performed with four-layer PCB.
Note 7: Both channels driven in phase.
Note 8: Testing performed with an 8 resistor connected between LC filter output and ground. Mode transitions are controlled by
SHDN. KCP level is calculated as 20log[(peak voltage during mode transition, no input signal) / 1VRMS].
Note 9: Digital input specifications apply to both single-supply and dual-supply operation.
Note 10: Channels driven 180° out-of-phase. Load connected between LC filter outputs.
Note 11: LF = 22H and CF = 0.68F.
Note 12: Testing performed with an 8 resistor connected between LC filter outputs. Mode transitions are controlled by SHDN. KCP
level is calculated as 20log[(peak voltage during mode transition, no input signal) / 1VRMS].
ELECTRICAL CHARACTERISTICS—Single-Supply, BTL Configuration
(VDD = 24V, VSS = VSUB = LGND = 0V, VSHDN = 3.3V, VMID = 12V, CVDD = 660F, CMID1 = 10F, CMID2 = 10F, R1 = R2 = R3 =
10k, CSFT = 0.47F, COUT = 1000F, CFB_1 = 150pF, CFB_2 = 10pF, CBOOT = 0.1F, CREGP = CREGM = 1F, RIN_ = 30.1k, RF1A
= 121k, RF1B = 562k, RF2 = 681k, RREF = 68k, RL = ∞, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA =
+25°C.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Output Offset Voltage
(Note 4)
7
mV
VDD = 20V to 40V
88
Power-Supply Rejection Ratio
(Note 4)
PSRR
VDD = 24V + 500mVP-P, f = 1kHz
77
dB
Continuous Output Power
POUT
RL = 8
, fIN = 1kHz, THD+N = 10%,
(Notes 6, 10, and 11)
32
W
Efficiency
RL = 8
, POUT = 10W, THD+N = 10%,
(Notes 5 and 6)
83
%
Total Harmonic Distortion Plus
Noise (Notes 6, 10, and 11)
THD+N
fIN = 1kHz, BW = 22Hz to 22kHz,
RL = 8
, POUT = 10W
0.08
%
Unweighted
90
Signal-to-Noise Ratio
SNR
POUT = 32W, RL = 8
,
BW = 22Hz to 22kHz
(Notes 6, 10, and 11)
A-weighted
96
dB
Shutdown-to-Full Operation
tSON
68
ms
Into shutdown
-47
Click-and-Pop
KCP
Peak voltage, 32-samples
per second, A-weighted
(Notes 4, 11, and 12)
Out of shutdown
-32
dBV
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9742ETX+ | 功能描述:音频放大器 Stereo 16W Class D Amplifier 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 |
| MAX9742ETX+T | 功能描述:音频放大器 Stereo 16W Class D Amplifier 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 |
| MAX9742EVKIT+ | 功能描述:音频放大器 Evaluation Kit for the MAX9742 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 |
| MAX9744ETH+ | 功能描述:音频放大器 Stereo 20W Class D Amplifier 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 |
| MAX9744ETH+T | 功能描述:音频放大器 Stereo 20W Class D Amplifier 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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