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參數(shù)資料
| 型號： | MAX98306ETD+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/14頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO 3.7W STER D 14TDFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | D 類 |
| 輸出類型： | 2 通道（立體聲） |
| 在某負(fù)載時最大輸出功率 x 通道數(shù)量： | 3.7W x 2 @ 3 歐姆 |
| 電源電壓： | 2.6 V ~ 5.5 V |
| 特點： | 消除爆音，差分輸入，短路和熱保護(hù)，關(guān)閉 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 14-TDFN-EP（3x3） |
| 封裝/外殼： | 14-WFDFN 裸露焊盤 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | MAX98306ETD+TDKR |
10 _____________________________________________________________________________________
MAX98306
Stereo 3.7W Class D Amplifier
Applications Information
Filterless Class D Operation
Traditional Class D amplifiers require an output filter.
The filter adds cost and size and decreases THD perfor-
mance. The IC’s filterless modulation scheme does not
require an output filter.
Because the switching frequency of the IC is well
beyond the bandwidth of most speakers, voice coil
movement due to the switching frequency is very small.
Use a speaker with a series inductance > 10FH. Typical
8I speakers exhibit series inductances in the 20FH to
100FH range.
Component Selection
Power-Supply Input (PVDD)
PVDD powers the speaker amplifier. PVDD ranges from
2.6V to 5.5V. Bypass PVDD with 0.1FF and 10FF capaci-
tors to PGND. Apply additional bulk capacitance at the
device if long input traces between PVDD and the power
source are used.
Input Filtering
The input-coupling capacitor (CIN), in conjunction with
the amplifier’s internal input resistance (RIN), forms a
highpass filter that removes the DC bias from the incom-
ing signal. These capacitors allow the amplifier to bias
the signal to an optimum DC level.
Assuming zero source impedance, CIN is:
=
π
×
IN
3dB
IN
1
C
2 f
R
where f-3dB is the -3dB corner frequency and RIN is the
typical value as specified in the Electrical Characteristics
table. Use capacitors with adequately low-voltage coeffi-
cients for best low-frequency THD performance. Table 2
shows calculated capacitance values based on a 20Hz
highpass filter.
Layout and Grounding
Proper layout and grounding are essential for optimum
performance. Good grounding improves audio perfor-
mance and prevents switching noise from coupling into
the audio signal.
Use wide, low-resistance output traces. As the load
impedance decreases, the current drawn from the
device increases. At higher current, the resistance of the
output traces decrease the power delivered to the load.
For example, if 2W is delivered from the device output to
a 4I load through 100mI of total speaker trace, 1.904W
is delivered to the speaker. If power is delivered through
10mI of total speaker trace, 1.99W is delivered to the
speaker. Wide output, supply, and ground traces also
improve the power dissipation of the device.
The IC is inherently designed for excellent RF immunity.
For best performance, add ground fills around all signal
traces on top or bottom PCB planes.
Chip Information
PROCESS: CMOS
Table 2. Capacitance Value for 20Hz
Highpass Filter
GAIN
RIN (kI)
CIN for 20Hz (nF)
18
33
241
15
46
173
12
65
122
9
93
86
6
131
61
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX98306EVKIT# | 功能描述:音頻 IC 開發(fā)工具 MAX98306 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)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 |
| MAX98307ETE+ | 功能描述:音頻放大器 3.3W Mono Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX98307ETE+T | 功能描述:音頻放大器 3.3W Mono Class D Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX98307EVKIT# | 功能描述:音頻 IC 開發(fā)工具 MAX98307 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)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 |
| MAX98308EWC+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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