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TFA9872CUK/N1Z PDF预览

TFA9872CUK/N1Z

更新时间： 2024-11-14 19:53:35
品牌 Logo 应用领域
恩智浦 - NXP 放大器商用集成电路
页数 文件大小 规格书
32页 345K
描述
Audio Amplifier

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TFA9872CUK/N1Z 技术参数

是否Rohs认证： 符合生命周期：Obsolete
包装说明：,Reach Compliance Code：compliant
风险等级：5.81商用集成电路类型：AUDIO AMPLIFIER
湿度敏感等级：1峰值回流温度（摄氏度）：260
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

TFA9872CUK/N1Z 数据手册

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TFA9872_SDS  
High Efficiency Class-D Audio Amplifier with Speaker-as-  
Microphone  
Rev. 1 — 12 April 2017  
Product short data sheet  
COMPANY PUBLIC  
1 General description  
The TFA9872 is a 9.5 V boosted class-D audio amplifier featuring Speaker-as-  
Microphone (SaM) and Receiver-as-Microphone (RaM) modes. It can deliver up to  
10.0 W peak output power into an 8 Ω speaker and up to 11.8 W peak output power into  
a 6 Ω speaker, at a supply voltage of 4.0 V. The internal adaptive DC-to-DC converter  
raises the supply voltage to 9.5 V, providing ample headroom for major improvements in  
sound quality.  
Internal adaptive DC-to-DC conversion boosts the supply rail to provide additional  
headroom and power output. The supply voltage is only raised when necessary,  
maximizing the output power of the class-D audio amplifier while limiting quiescent power  
consumption.  
The device can be configured to drive either a hands-free speaker (4 Ω to 8 Ω) for audio  
playback, or a receiver speaker (32 Ω) for handset playback, allowing it to be embedded  
in platforms that support either or both options. The maximum output power, gain, and  
noise levels are lower in the Handset Call use case than in the Hands-free Call use case.  
The SaM feature allows the speaker to be used as an additional microphone when  
not configured for audio playback. This function performs best in high sound pressure  
environments (like concert recording or wind noise calls) and is targeted at such use  
cases.  
The TFA9872 also incorporates battery protection. By limiting the supply current when  
the battery voltage is low, the device is prevented from switching off unexpectedly due to  
excessive load currents (excessive load currents can lead to a system undervoltage).  
Because it has a digital input interface that is insensitive to clock jitter, the TFA9872  
features low RF susceptibility. The second order closed loop architecture used in a class-  
D audio amplifier provides excellent audio performance and high supply voltage ripple  
rejection. The audio input interface is I2S and the control settings are communicated via  
an I2C-bus interface.  
The TFA9872 is available in a 42-bump WLCSP (Wafer Level Chip-Size Package) with a  
400 mm pitch.  
 
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