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参数资料
| 型号： | MAX9736DETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/25页 |
| 文件大小： | 0K |
| 描述： | IC AMP CLASS D HIGH PWR 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | D 类 |
| 输出类型： | 1-通道（单声道）或 2-通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 17mW x 1 @ 4 欧姆; 8.5mW x 2 @ 8 欧姆 |
| 电源电压： | 8 V ~ 28 V |
| 特点： | 消除爆音，静音，短路保护和热保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 管件 |
MAX9736
Mono/Stereo High-Power Class D Amplifier
16
______________________________________________________________________________________
reduces the efficiency, the THD+N performance, and
the output power of the MAX9736. When evaluating
with a load speaker, no series inductor is required.
Inductor-Based Output Filters
Some applications use the MAX9736 with a full induc-
tor-/capacitor-based (LC) output filter. Select the PWM
output mode for best audio performance. 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 prima-
ry 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 a peak response near
the cutoff frequency.
Component Selection
Gain-Setting Resistors
External feedback resistors set the gain of the
MAX9736. The output stage provides a fixed internal
gain in addition to the externally set input stage gain.
For the MAX9736A/D, the fixed output-stage gain is set
at 17dB (7V/V). For the MAX9736B, the fixed output-
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 10kΩ and 50kΩ.
The FB terminal is an op amp output and the IN termi-
nal is the op amp inverting input, allowing the MAX9736
to be configured as a summing amplifier, a filter, or an
equalizer.
Input Capacitor
An input capacitor, CIN, in conjunction with the input
resistor, RIN, of the MAX9736 forms a highpass filter
that removes the DC bias from an incoming signal. The
AC-coupling capacitor allows the amplifier to automati-
cally bias the signal to an optimum DC level. Assuming
zero-source impedance, the -3dB point of the highpass
filter is given by:
Choose CIN so that f-3dB is well below the lowest frequen-
cy of interest. Use capacitors whose dielectrics have low
voltage coefficients. Capacitors with high-voltage coeffi-
cients cause increased distortion close to f-3dB.
COM Capacitor
COM is the output of the internally generated DC bias
voltage. Bypass COM with a 1μF capacitor to AGND.
Power Supplies
The MAX9736 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 MAX9736 is powered by VS.
Power-Supply Sequencing
During power-up and power-down, VS must not exceed
PVDD. VS greater than PVDD will damage the device.
f
RC
dB
IN IN
=
3
1
2
π
MAX
A D A
R
VV
MAX
B
V
F
IN
9736
7 1
9736
:.
:
=
.
A
R
VV
V
F
IN
=
48
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
16
33
0.10
33
Table 1. Suggested Values for LC Filter
MAX9736
CIN
AUDIO
INPUT
RIN
RF
CCOM
FB_
IN_
COM
OUT_+
OUT_-
Figure 5. Setting Gain
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9736DETJ+ | 功能描述:音频放大器 Mono/Stereo Class D Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9736DETJ+T | 功能描述:音频放大器 Mono/Stereo Class D Amplifier RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9736DEVKIT+ | 功能描述:音频放大器 EVKIT for MAX9736d RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9737ETG/V+ | 制造商:Maxim Integrated Products 功能描述:MONO 7W CLASS D AMPLIFIER - Rail/Tube 制造商:Maxim Integrated Products 功能描述:IC AMP MONO 7W CLASS D 24-TQFN |
| MAX9737ETG/V+T | 制造商:Maxim Integrated Products 功能描述:MONO 7W CLASS D AMPLIFIER - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC AMP MONO 7W CLASS D 24-TQFN 制造商:Maxim Integrated Products 功能描述:Mono 7W Class D Amplifier |
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