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參數資料
| 型號： | MAX9737EVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 12/13頁 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX9737 |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| 放大器類型： | D 類 |
| 輸出類型： | 1-通道（單聲道） |
| 在某負載時最大輸出功率 x 通道數量： | 13W x 1 @ 4 歐姆 |
| 電源電壓： | 8 V ~ 28 V |
| 工作溫度： | -40°C ~ 85°C |
| 板類型： | 完全填充 |
| 已用 IC / 零件： | MAX9737 |
| 已供物品： | 板 |
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX9737EVKIT+ | 功能描述:音頻 IC 開發工具 MAX9737 Eval Kit RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX9738EVKIT+ | 功能描述:放大器 IC 開發工具 MAX9738 Eval Kit RoHS:否 制造商:International Rectifier 產品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓: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:音頻放大器 16VP-P Class G Amplifier RoHS:否 制造商:STMicroelectronics 產品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX973C/D | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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