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| 型号： | MAX9736DETJ+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/25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
______________________________________________________________________________________
15
Click-and-Pop Suppression
The MAX9736 features comprehensive click-and-pop
suppression that minimizes audible transients on start-
up and shutdown. While in shutdown, the H-bridge is in
a high-impedance state.
Mono Configuration
The MAX9736 features a mono mode that allows the
right and left channels to operate in parallel, achieving
up to 30W (MAX9736A) of output power. Apply a logic-
high to MONO to enable mono mode. In mono mode,
an audio signal applied to the left channel (INL) is rout-
ed to the H-bridges of both channels. Also in mono
mode, the right-channel preamplifier becomes an
uncommitted operational amplifier, allowing for flexibili-
ty in system design. Connect OUTL+ to OUTR+ and
OUTL- to OUTR- using heavy PCB traces as close as
possible to the device. Driving MONO low (stereo
mode) while the outputs are wired together in mono
mode can trigger the short-circuit or thermal-overload
protection or both.
Current Limit
When the output current reaches the current limit, 4.6A
(typ), the MAX9736 disables the outputs and initiates a
450μs startup sequence. The shutdown and startup
sequence is repeated until the output fault is removed.
Properly designed applications do not enter current-
limit mode unless the output is short circuited or con-
nected incorrectly.
Thermal Shutdown
When the die temperature reaches the thermal shut-
down threshold, +160°C (typ), the MAX9736 outputs
are disabled. When the die temperature decreases by
30°C, normal operation resumes. Some causes of ther-
mal shutdown are excessively low load impedance,
poor thermal contact between the MAX9736‘s exposed
pad and the PCB, elevated ambient temperature, or
poor PCB layout and assembly.
Applications Information
Filterless Class D Operation
The MAX9736 meets EN55022B EMC radiation limits
with an inexpensive ferrite bead and capacitor filter
when the speaker leads are less than or equal to 1m.
Select a ferrite bead with 100Ω to 600Ω impedance
and rated for at least 2A. The capacitor value varies
based on the ferrite bead chosen and the speaker lead
length. See Figure 3 for the correct connections of
these components.
When evaluating the MAX9736 with a ferrite bead filter
and resistive load, include a series inductor (68μH for
8Ω load and 33μH for 4Ω load) to model the actual
loudspeaker’s behavior. Omitting the series inductor
MAX9736
C1
330pF
FB1 AND FB2 = WURTH 742792040
C2
330pF
FB1
FB2
Figure 3. Ferrite Bead Filter
FREQUENCY (MHz)
AMPLITUDE
(dB
μ
V/m)
400
300
200
100
10
15
20
25
30
35
40
5
30
500
600
700
800
900
1000
EN55022B LIMIT
Figure 2. EMI Performance
MAX9736
C3
L1
L2
C2
C1
C5
R2
C4
R1
Figure 4. Output Filter for PWM Mode
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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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