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參數(shù)資料
| 型號： | MAX9730EVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 12/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVALUATION KIT FOR MAX9730 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 放大器類型： | G 類 |
| 輸出類型： | 1-通道（單聲道） |
| 在某負(fù)載時最大輸出功率 x 通道數(shù)量： | 2.4W x 1 @ 8 歐姆 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 板類型： | 完全填充 |
| 已用 IC / 零件： | MAX9730 |
| 已供物品： | 板 |
MAX9730
2.4W, Single-Supply, Class G Power Amplifier
_______________________________________________________________________________________
9
In differential input configurations, the common-mode
rejection ratio (CMRR) is primarily limited by the exter-
nal resistor and capacitor matching. Ideally, to achieve
the highest possible CMRR, the following external com-
ponents should be selected where:
and
Component Selection
Input-Coupling Capacitor
The AC-coupling capacitors (CIN_) and input resistors
(RIN_) form highpass filters that remove any DC bias from
an input signal (see the
Typical Application
Circuit/Functional Diagram). CIN_ blocks DC voltages
from the amplifier. The -3dB point of the highpass filter,
assuming zero source impedance due to the input signal
source, is given by:
Choose CIN so that f-3dB is well below the lowest fre-
quency of interest. Setting f-3dB too high affects the
amplifier’s low frequency response. Use capacitors with
low-voltage coefficient dielectrics. Aluminum electrolytic,
tantalum, or film dielectric capacitors are good choices
for AC-coupling capacitors. Capacitors with high-voltage
coefficients, such as ceramics (non-C0G dielectrics),
can result in increased distortion at low frequencies.
Charge-Pump Capacitor Selection
Use capacitors with an ESR less than 50m
Ω for opti-
mum performance. Low-ESR ceramic capacitors mini-
mize the output resistance of the charge pump. For
best performance over the extended temperature
range, select capacitors with an X7R dielectric.
Flying Capacitor (C1)
The value of the flying capacitor (C1) affects the load
regulation and output resistance of the charge pump. A
C1 value that is too small degrades the device’s ability
to provide sufficient current drive. Increasing the value
of C1 improves load regulation and reduces the charge-
resistance of the switches and the ESR of C1 and C2
dominate. A 4.7F capacitor is recommended.
Hold Capacitor (C2)
The output capacitor value and ESR directly affect the
ripple at PVSS. Increasing C2 reduces output ripple.
Likewise, decreasing the ESR of C2 reduces both rip-
ple and output resistance. A 10F capacitor is recom-
mended.
Charge-Pump Frequency Set Resistor (RFS)
The charge pump operates in two modes. When the
charge pump is loaded below 100mA, it operates in a
slow mode where the oscillation frequency is reduced
to 1/4 of its normal operating frequency. Once loaded,
the charge-pump oscillation frequency returns to nor-
mal operation. In applications where the design may be
sensitive to the operating charge-pump oscillation fre-
quency, the value of the external resistor RFS can be
changed to adjust the charge-pump oscillation fre-
quency (see Figure 4).
f
RC
Hz
dB
IN
=
××
()
3
1
2
π
__
CC
IN
+ =
R
FB
IN
FB
IN
+
=
CHARGE-PUMP OSCILLATION
FREQUENCY vs. RFS
MAX9730
fig04
RFS (k
Ω)
CHARGE-PUMP
OSCILLATION
FREQUENCY
(kHz)
125
100
75
250
300
350
400
450
500
550
600
200
50
150
ILOAD > 100mA
Figure 4. Charge-Pump Oscillation Frequency vs. RFS
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9730EVKIT+ | 功能描述:音頻 IC 開發(fā)工具 MAX9730 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 |
| MAX9730EWP+TG45 | 功能描述:音頻放大器 2.4W Class G Power 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 |
| MAX9736AETJ/V+ | 功能描述:音頻放大器 Mono/Stereo 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 |
| MAX9736AETJ/V+T | 功能描述:音頻放大器 Mono/Stereo 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 |
| MAX9736AETJ+ | 功能描述:音頻放大器 Mono/Stereo 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 |
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