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SA58672单声道3W无滤波器D类音频功率放大器IC电路特点及应用原理图介绍
文章来源: 更新时间:2010/9/11 22:33:00
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  NXP 公司的SA58672单声道 3W D类无滤波器音频功率放大器,具有关断控制,高的PSRR和差分电路拓扑,从而提高了噪音和RF的免疫功能,快速起动和小型WLCSP封装,使它非常适合用在手机和PDA等手提设备.本文介绍了SA58672主要特性,方框图以及评估板电路图SA58672测试方框图

  SA58672: 3.0 W mono class-D audio amplifier

  The SA58672 is a mono, filter-free class-D audio amplifier which is available in a 9 bump WLCSP (Wafer Level Chip-Size Package) and 10-terminal HVSON packages.

  The SA58672 features shutdown control. Improved immunity to noise and RF rectification is increased by high PSRR and differential circuit topology. Fast start-up time and very small WLCSP package makes it an ideal choice for both cellular handsets and PDAs.

  The SA58672 delivers 1.7 W at 5 V and 800 mW at 3.6 V into 8 ohm. It delivers 3.0 W at 5 V and 1.6 W at 3.6 V into 4 ohm . The maximum power efficiency is excellent at 90 % into 8 ohm and 84% to 88% into 4 ohm . The SA58672 provides thermal and short-circuit shutdown protection.

  SA58672主要特性:

  Output power

  3.0 W into 4 ohm at 5 V

  1.6 W into 4 ohm at 3.6 V

  1.7 W into 8 ohm at 5 V

  800 mW into 8 ohm at 3.6 V

  Power supply range: 2.0 V to 5.5 V

  Shutdown control

  High SVRR:77 dB at 217 Hz

  Fast start-up time: 7.0 ms

  Low supply current

  Low shutdown current

  Short-circuit and thermal protection

  Space savings with 1.66 mmx1.71 mmx0.6 mm 9 bump WLCSP package

  Low junction to ambient thermal resistance of 100 K/W with adequate heat sinking of WLCSP

  Enhanced power dissipation with 3.0 mmx3.0 mmx0.85 mm HVSON10 package

  SA58672应用 :

  Wireless and cellular handsets and PDAs

  Portable DVD player

  USB speakers

  Notebook PC

  Portable radio and gaming

  Educational toys

  

  图1.SA58672方框图

  

  图2.SA58672评估板电路图

  

  图3.SA58672测试方框图

 
 
 
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