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| 型号： | MAX9768EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 13/26页 |
| 文件大小： | 0K |
| 描述： | EVALUATION KIT FOR MAX9768 |
| 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： | 10W x 1 @ 8 欧姆 |
| 电源电压： | 4.5 V ~ 14 V |
| 工作温度： | -40°C ~ 85°C |
| 板类型： | 完全填充 |
| 已用 IC / 零件： | MAX9768 |
| 已供物品： | 板 |
MAX9768
10W Mono Class D Speaker
Amplifier with Volume Control
20
______________________________________________________________________________________
Applications Information
Filterless Class D Operation
The MAX9768 can be operated without a filter and
meet common EMC radiation limits when the speaker
leads are less than approximately 10cm. Lengths
beyond 10cm are possible but should be verified
against the appropriate EMC standard. Select the filter-
less modulation mode with spread-spectrum modula-
tion mode for best performance.
For longer speaker wire lengths, a simple ferrite bead
and capacitor-based filter can be used to meet EMC
limits. See Figure 7 for the correct connections of these
components. Select a ferrite bead with 100
Ω to 600Ω
impedance, and rated for at least 1.5A. The capacitor
value will vary based on the ferrite bead chosen and
the actual speaker lead length. Select the capacitor
value based on EMC performance.
When doing bench evaluation without a filter or a ferrite
bead filter, include a series inductor (68H for 8
Ω load)
to model the actual loudspeaker’s behavior. If this
inductance is omitted, the MAX9768 will have reduced
efficiency and output power, as well as worse THD+N
performance.
Table 7. Setting Class D Output Modulation Scheme
D7 (MSB)
D6
D5
D4
D3
D2
D1
D0 (LSB)
FUNCTION
1
0
1
0
1
0
1
Classic PWM
1
0
1
0
1
0
FILTERLESS MODULATION*
BOOT_+
C1
0.1
μF
C9
330pF
C10
330pF
OUT_+
BOOT_-
C2
0.1
μF
OUT_-
MAX9768
Figure 7. Ferrite Bead Filter
*
Power-on default.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9768EVKIT+ | 功能描述:音频 IC 开发工具 MAX9768 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 |
| MAX976ESA | 功能描述:校验器 IC Dual High Speed Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MAX976ESA+ | 功能描述:校验器 IC Dual High Speed Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MAX976ESA+T | 功能描述:校验器 IC Dual High Speed Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MAX976ESA-T | 功能描述:校验器 IC Dual High Speed Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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