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參數(shù)資料
| 型號(hào)： | MAX9737EVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 13/13頁(yè) |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX9737 |
| 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： | D 類 |
| 輸出類型： | 1-通道（單聲道） |
| 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)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 |
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When evaluating the MAX9737 with a ferrite bead filter
and resistive load, include a series inductor (68H for
8
Ω load and 33H for 4Ω load) to model typical loud-
speaker’s behavior. Omitting the series inductor
reduces the efficiency, the THD+N performance and
the output power of the MAX9737. When evaluating
with a loudspeaker, no series inductor is required.
Inductor-Based Output Filters
Some applications use the MAX9737 with a full induc-
tor/capacitor-based (LC) output filter. See Figure 4 for
the correct connections of these components.
The load impedance of the speaker determines the fil-
ter component selection (see Table 1).
Inductors L1 and L2 and capacitor C1 form the primary
output filter. Capacitors C2 and C3 provide common-
mode filtering to reduce radiated emissions. Capacitors
C4 and C5, plus resistors R1 and R2, form a Zobel at
the output. A Zobel corrects the output loading to com-
pensate for the rising impedance of the loudspeaker.
Without a Zobel, the filter exhibits peaking near the cut-
off frequency.
Component Selection
Gain-Setting Resistors
The output stage provides a fixed internal gain in addi-
tion to the externally set input stage gain. The fixed-out-
put stage gain is set at 13.6dB (4.8V/V). Set overall gain
by using resistors RF and RIN (Figure 5) as follows:
where AV is the desired voltage gain. Choose RF
between 10k
Ω and 50kΩ.
The PRE terminal is an operational amplifier output,
allowing the MAX9737 to be configured as a filter or an
equalizer.
Input Capacitor
An input capacitor, CIN, in conjunction with the input
resistor, RIN, of the MAX9737 forms a highpass filter
that removes the DC bias from an incoming signal. The
AC-coupling capacitor allows the amplifier to bias the
signal to an optimum DC level. Assuming negligible
source impedance, the -3dB point of the highpass filter
is given by:
Choose CIN such that f-3dB is well below the lowest fre-
quency of interest. To reduce low-frequency distortion,
use capacitors whose dielectrics have low-voltage
coefficients. Capacitors with high-voltage coefficients
cause increased distortion close to f-3dB. For best click-
and-pop suppression, use a 0.47F input capacitor.
COM Capacitor
COM is the output of the internally generated DC bias
voltage. Bypass COM with a 1F capacitor to AGND.
Regulator Capacitor
REG is the output of the internally generated DC bias
voltage. Bypass REG with a 1F capacitor to AGND.
Power Supplies
The MAX9737 features separate supplies for signal and
power portions of the device, allowing for the optimum
combination of headroom, power dissipation and noise
immunity. The speaker amplifiers are powered from
PVDD and can range from 8V to 28V. The remainder of
the device is powered by an internal 5V regulator, VS.
Internal Regulator
The MAX9737 features an internal 5V regulator, VS,
powered from PVDD. Bypass VS with a 1F capacitor to
AGND.
f
RC
dB
IN IN
-3
1
2
=
π
A
R
VV
V
F
IN
=
-4 8
./
MAX9737
Mono 7W Class D Amplifier
_______________________________________________________________________________________
9
MAX9737
R2
C5
C3
R1
C4
C2
L2
L1
RL
C1
Figure 4. LC Filter Configuration
MAX9737
AUDIO
INPUT
OUT+
OUT-
PRE
IN
COM
CCOM
PC
RIN
CIN
RF
Figure 5. Preamplifier Gain Configuration
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9737EVKIT+ | 功能描述:音頻 IC 開(kāi)發(fā)工具 MAX9737 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX9738EVKIT+ | 功能描述:放大器 IC 開(kāi)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(píng)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX973C/D | 功能描述:校驗(yàn)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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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