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參數(shù)資料
| 型號： | MAX9738EVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 0K |
| 描述： | KIT EVALUATION FOR MAX9738 |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| 放大器類型： | G 類 |
| 輸出類型： | 1-通道（單聲道） |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -45°C ~ 85°C |
| 板類型： | 完全填充 |
| 已用 IC / 零件： | MAX9738 |
| 已供物品： | 板 |
| 相關(guān)產(chǎn)品： | MAX9738EWP+TG45-ND - IC AMP AUDIO PWR MONO G 20WLP |
MAX9738
Rectifier Diode Selection
The MAX9738’s high-switching frequency demands a
high-speed rectifier. Schottky diodes are recommend-
ed for most applications because of their fast recovery
time and low forward voltage. In general, a 1A to 2A
Schottky diode complements the internal MOSFET.
Ceramic Speaker Impedance
Characteristics
A 1μF capacitor is a good model for the ceramic
speaker as it best approximates the impedance of a
ceramic speaker over the audio band. When selecting
a capacitor to simulate a ceramic speaker, the capaci-
tor’s voltage rating must be equal to or higher than the
expected amplifier output voltage swing.
Series Load Resistor
The capacitive nature of the ceramic speaker results in
very low impedances at high frequencies. To prevent
the ceramic speaker from shorting the amplifier output
at high frequencies, a series load resistor must be
used. The output load resistor and the ceramic speaker
create a lowpass filter. To set the rolloff frequency of
the output filter, the approximate capacitance of the
speaker must be known. This information can be
obtained from bench testing or from the ceramic
speaker manufacturer. Set the lowpass filter cutoff fre-
quency with the following equation:
Increasing the value of RL decreases the amount of
high-frequency audio content sent to the speaker, but
improves the MAX9738’s power dissipation. Lowering
the value of RL burdens the amplifier output stage with
more power dissipation. An RL of 20Ω is a good com-
promise between power dissipation and frequency
response when coupled with a typical ceramic speaker.
WLP Applications Information
For the latest application details on WLP construction,
dimensions, tape carrier information, PCB techniques,
bump-pad layout, and recommended reflow tempera-
ture profile, as well as the latest information on reliability
testing results, go to the Maxim website at www.maxim-
ic.com/ucsp for Application Note 1891:
UCSP—A
Wafer-Level Chip-Scale Package.
fLP
L
SPEAKER
Hz
=
××
()
1
2R
C
π
16VP-P Class G Amplifier with
Inverting Boost Converter
12
______________________________________________________________________________________
IMPEDANCE vs. FREQUENCY
MAX9738
fig04
FREQUENCY (Hz)
IMPEDANCE
(Ω
)
10
1
0.1
0.01
100
1k
10k
100k
1M
10
0.001
100
1
μF CAPACITOR
CERAMIC
SPEAKER
Figure 4. Ceramic Speaker and Capacitor Impedance
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9738EVKIT+ | 功能描述:放大器 IC 開發(fā)工具 MAX9738 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)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(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(chǎn)品: 比較器類型: 通道數(shù)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 |
| MAX973CPA | 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)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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