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参数资料
| 型号： | MAX98300EVKIT+TDFN |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/14页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX98300-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 放大器类型： | D 类 |
| 输出类型： | 1-通道（单声道） |
| 在某负载时最大输出功率 x 通道数量： | 2.6W x 1 @ 4 欧姆 |
| 电源电压： | 2.6 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 板类型： | 完全填充 |
| 已用 IC / 零件： | MAX98300 |
| 已供物品： | 板 |
9
Maxim Integrated
Mono 2.6W Class D Amplifier
MAX98300
Shutdown
The MAX98300 features a low-power shutdown mode,
drawing less than 0.1FA of supply current. Drive SHDN
low to put the MAX98300 into shutdown.
Click-and-Pop Suppression
The MAX98300 speaker amplifier features Maxim’s com-
prehensive click-and-pop suppression. During startup,
the click-and-pop suppression circuitry reduces any
audible transient sources internal to the device. When
entering shutdown, the differential speaker outputs ramp
down to PGND quickly and simultaneously.
Applications Information
Filterless Class D Operation
Traditional Class D amplifiers require an output filter.
The filter adds cost, size, and decreases efficiency and
THD+N performance. The MAX98300’s filterless modula-
tion scheme does not require an output filter (Figure 1).
Because the switching frequency of the MAX98300 is
well beyond the bandwidth of most speakers, voice coil
movement due to the switching frequency is very small.
Use a speaker with a series inductance > 10FH. Typical
8I speakers exhibit series inductances in the 20FH to
100FH range.
Component Selection
Speaker Amplifier Power Supply Input (PVDD)
PVDD powers the speaker amplifier. PVDD ranges
from 2.6V to 5.5V. Bypass PVDD with a 0.1FF and 10FF
capacitor to PGND. Apply additional bulk capacitance
at the device if long input traces between PVDD and the
power source are used.
Input Filtering
The input-coupling capacitor (CIN), in conjunction with the
amplifier’s internal input resistance (RIN), forms a high-
pass filter that removes the DC bias from the incoming
signal. These capacitors allow the amplifier to bias the
signal to an optimum DC level.
Assuming zero source impedance with a gain setting of
AV = 6dB, 9dB, or 12dB, CIN is:
IN
3dB
8
C
[ F]
f
=
with a gain setting of AV = 3dB, CIN is:
IN
3dB
5.7
C
[ F]
f
=
with a gain setting of AV = 0dB, CIN is:
IN
3dB
4
C
[ F]
f
=
where f-3dB is the -3dB corner frequency. Use capaci-
tors with adequately low voltage-coefficient for best low-
frequency THD performance.
Layout and Grounding
Proper layout and grounding are essential for optimum
performance. Good grounding improves audio perfor-
mance and prevents switching noise from coupling into
the audio signal.
Use wide, low-resistance output traces. As load imped-
ance decreases, the current drawn from the device
outputs increase. At higher current, the resistance of the
output traces decreases the power delivered to the load.
For example, if 2W is delivered from the speaker output
to a 4I load through a 100mI trace, 49mW is consumed
in the trace. If power is delivered through a 10mI trace,
only 5mW is consumed in the trace. Wide output, supply,
and ground traces also improve the power dissipation of
the device.
The MAX98300 is inherently designed for excellent RF
immunity. For best performance, add ground fills around
all signal traces on top or bottom PCB planes.
The MAX98300 TDFN-EP package features an exposed
thermal pad on its underside. This pad lowers the pack-
age’s thermal resistance by providing a heat conduction
path from the die to the PCB. Connect the exposed ther-
mal pad to the ground plane by using a large pad and
multiple vias.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX98300EWL+T | 功能描述:音频放大器 2W Mono 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 |
| MAX98300SETA+T | 功能描述:音频放大器 Mono 2W 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 |
| MAX98302ETD+ | 功能描述:IC AMP STER CLASS D 2.4W 14TDFN RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR) |
| MAX98302ETD+T | 功能描述:音频放大器 2W 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 |
| MAX98302EVKIT+ | 功能描述:音频 IC 开发工具 MAX98302 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
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