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参数资料
| 型号： | MAX9737ETG+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/13页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 13W MONO D 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | D 类 |
| 输出类型： | 1-通道（单声道） |
| 在某负载时最大输出功率 x 通道数量： | 13W x 1 @ 4 欧姆 |
| 电源电压： | 8 V ~ 28 V |
| 特点： | 消除爆音，静音，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： | 24-TQFN-EP（4x4） |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 包装： | 标准包装 |
| 其它名称： | MAX9737ETG+TDKR |
MAX9737
Mute Function
The MAX9737 features a mute mode where the signal is
attenuated at the speaker and the outputs stop switch-
ing. To mute the MAX9737, drive MUTE low.
Click-and-Pop Suppression
The MAX9737 features comprehensive click-and-pop
suppression and precharge circuitry that reduce audi-
ble transients on startup and shutdown. The precharge
circuit enables the amplifier within 10ms without any
clicks or pops. Connect PC between the input resistor
(RIN) and the input capacitor (CIN). For optimal click-
and-pop suppression, use a 0.47F input coupling
capacitor (CIN).
Current Limit
When output current exceeds the current limit, 4.6A
(typ), the MAX9737 disables the outputs and initiates a
450s startup sequence. The shutdown and startup
sequence is repeated until the output fault is removed.
Properly designed applications do not enter current-
limit mode unless the output is short circuited or con-
nected incorrectly.
Thermal Shutdown
When the die temperature exceeds the thermal-shut-
down threshold, +160°C (typ), the MAX9737 outputs
are disabled. When the die temperature decreases by
30°C, normal operation resumes. Some causes of ther-
mal shutdown are excessively low load impedance,
poor thermal contact between the MAX9737’s exposed
pad and the PCB, elevated ambient temperature, or
poor PCB layout and assembly.
Applications Information
Filterless Class D Operation
The MAX9737 meets EN55022B EMC radiation limits
with an inexpensive ferrite bead and capacitor filter
when the speaker leads are less than or equal to 1m
(Figure 3). Select a ferrite bead with 100
Ω to 600Ω
impedance, and rated for 2A. The capacitor value
varies based on the ferrite bead chosen and the speak-
er lead length. See Figure 2 for the correct connections
of these components.
Mono 7W Class D Amplifier
8
_______________________________________________________________________________________
0
20
10
40
30
60
50
70
90
80
100
02
3
1
45678
EFFICIENCY
vs. OUTPUT POWER
OUTPUT POWER (W)
EFFICIENCY
(%)
MAX9737
CLASS AB
Figure 1. MAX9737 Efficiency vs. Class AB Efficiency
MAX9737
FB1
FB2
C1
330pF
C2
330pF
FB1 AND FB2: WURTH742792040
Figure 2. Ferrite Bead Filter Configuration
RL (
Ω)
L1, L2 (H)
C1 (F)
C2, C3 (F)
C4, C5 (F)
R1, R2 (
Ω)
4
10
0.47
0.10
0.22
10
8
15
0.15
15
Table 1. Suggested Values for LC Filter
FREQUENCY (MHz)
AMPLITUDE
(dB
μ
V/m)
100
5
10
15
20
25
30
35
40
0
30
1000
EN55022B LIMIT
Figure 3. MAX9737 EMI Performance with 1m Twisted-Pair
Speaker Cable
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9737EVKIT+ | 功能描述:音频 IC 开发工具 MAX9737 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 |
| MAX9738EVKIT+ | 功能描述:放大器 IC 开发工具 MAX9738 Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX9738EWP+T | 制造商:Maxim Integrated Products 功能描述:16VP-P CLASS G AMPLIFIER WITH INVER - Tape and Reel |
| MAX9738EWP+TG45 | 功能描述:音频放大器 16VP-P Class G 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 |
| MAX973C/D | 功能描述:校验器 IC RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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