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参数资料
| 型号： | MAX9742ETX+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/36页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 20.5W D 36TQFN |
| 标准包装： | 50 |
| 类型： | D 类 |
| 输出类型： | 2 通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 20.5W x 2 @ 8 欧姆 |
| 电源电压： | 20 V ~ 40 V，±10 V ~ 20 V |
| 特点： | 消除爆音，差分输入，静音，短路和热保护，关机 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 36-TQFN 裸露焊盘（6x6） |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 包装： | 管件 |
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MAX9742
Single-/Dual-Supply, Stereo 16W,
Class D Amplifier with Differential Inputs
12
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12
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Pin Description
PIN
NAME
FUNCTION
1, 6, 18,
27, 28, 36
N.C.
No Connection. Not internally connected.
2, 3
OUTL
Left Speaker Output
4
SUB
Device Substrate. Connect SUB to VSS.
5
BOOTL
Left-Channel Bootstrap Capacitor Terminal. Connect a 0.1F capacitor between BOOTL and OUTL.
7
INL+
Left-Channel Positive Input
8
INL-
Left-Channel Negative Input. Connect an external feedback capacitor between INL- and FBL. See the
Feedback Capacitor (CFB_) section.
9
FBL
Left-Channel Feedback Capacitor Terminal. Connect an external feedback capacitor between FBL and
INL-. See the Feedback Capacitor (CFB_) section.
10
REGM
-5V Internal Regulator Output. Regulator output voltage is with respect to MID. Bypass REGM with a 1F
capacitor to signal ground plane (SGND). See the Supply Bypassing/Layout section.
11
MID
Midsupply Bias Voltage Input. The MID input biases the internal preamplifiers to the average value of the
VDD and VSS supply inputs. For dual-supply operation, connect to the signal ground plane (SGND). For
single-supply operation, apply a voltage to MID equal to 0.5 x VDD through an external resistive voltage-
divider and decoupling network (see the Setting VMID section). See the Typical Application
Circuits/Functional Diagrams and Supply Bypassing/Layout sections.
12
REGP
5V Internal Regulator Output. Regulator output voltage is with respect to MID. Bypass REGP with a 1F
capacitor to the signal ground plane (SGND). See the Supply Bypassing/Layout section.
13
REFCUR
Reference Current Resistor Terminal. Connect an external resistor from REFCUR to REGP to set the
switching frequency and output short-circuit current-limit value. Use resistor values greater than or equal
to 58k
and less than or equal to 75k. See the Setting the Switching Frequency and Output Current
Limit (RREF) section.
14
SFT
Soft-Start Capacitor Terminal/Mute Input. Connect a 0.22F capacitor between SFT and PGND to utilize
the soft-start power-up sequence. Drive SFT low to mute the outputs.
15
LGND
Logic Ground. Connect LGND to signal ground (SGND) and power ground (PGND) planes. See the
Supply Bypassing/Layout section.
16
LVDD
Internal 5V Logic Supply. Bypass LVDD to LGND with a 0.1F capacitor.
17
SHDN
Active-Low Shutdown Input. Drive SHDN high for normal operation. Drive SHDN low to place the device
into shutdown mode.
19
FBR
Right-Channel Feedback Capacitor Terminal. Connect an external feedback capacitor between FBR and
INR-. See the Feedback Capacitor (CFB_) section.
20
INR-
Right-Channel Negative Input. Connect an external feedback capacitor between INR- and FBR. See the
Feedback Capacitor (CFB_) section.
21
INR+
Right-Channel Positive Input
22
NSENSE
Negative Supply Sense Input. NSENSE is internally connected to VSS. Connect a 1F bypass capacitor
between NSENSE and REGLS.
23
REGLS
7V Internal Regulator Output. REGLS output voltage is with respect to VSS. Bypass REGLS with a 1F
capacitor to NSENSE.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9742ETX+ | 功能描述:音频放大器 Stereo 16W 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 |
| MAX9742ETX+T | 功能描述:音频放大器 Stereo 16W 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 |
| MAX9742EVKIT+ | 功能描述:音频放大器 Evaluation Kit for the MAX9742 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 |
| MAX9744ETH+ | 功能描述:音频放大器 Stereo 20W 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 |
| MAX9744ETH+T | 功能描述:音频放大器 Stereo 20W 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 |
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