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TFA9874DUK/N1Z PDF预览

TFA9874DUK/N1Z

更新时间: 2024-09-28 19:11:27
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
24页 314K
描述
Audio Amplifier

TFA9874DUK/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:5.7商用集成电路类型:AUDIO AMPLIFIER
湿度敏感等级:1Base Number Matches:1

TFA9874DUK/N1Z 数据手册

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TFA9874D_E  
High Efficiency Class-D Audio Amplifier  
Rev. 1 — 14 August 2018  
Product data sheet  
1 General description  
The TFA9874D/E is a high efficiency 10.0 V boosted class-D audio amplifier. 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 up to 10.0 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. This  
maximizes 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 supporting both a hands-free speaker and a handset speaker. The maximum  
output power and the noise levels are lower in handset call use case than in hands-free  
call use case.  
The TFA9874D/E also incorporates battery protection. By limiting the supply current  
when the battery voltage is low, it prevents the audio system from drawing excessive  
load currents from the battery, which could cause a system under voltage. This circuitry  
minimizes the impact of a falling battery voltage by preventing unexpected device switch  
off due to excessive current drawn from the battery.  
The device features low RF susceptibility because it has a digital input interface that  
is insensitive to clock jitter. 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 TDM and the control settings are communicated via  
an I2C-bus interface.  
The TFA9874D/E is available in a 36-bump WLCSP (Wafer Level Chip-Size Package)  
with a 400 μm pitch.  
2 Features and benefits  
High output power: 5.6 W (average) into 8 Ω at 4.0 V supply voltage (THD = 1 %)  
Supports handset (16 Ω or 32 Ω) and hands-free (4 Ω to 8 Ω) speaker configurations  
High efficiency, low power dissipation and low-noise speaker driver  
Adaptive DC-to-DC converter increases the supply voltage smoothly when switching  
between Fixed Boost and Adaptive Boost modes, preventing large battery supply  
spikes and limiting quiescent power consumption  
Wide supply voltage range (fully operational from 2.7 V to 5.5 V)  
Very low noise output voltage <15 μV (with -60 dBFS input at fs = 48 kHz)  
Low battery current consumption <125 mA (Po = 380 mW, average music power)  
I2C-bus control interface (400 kHz)  
 
 

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