产品分类
D类功放
VA2218
General Description

The VA2218 is a cost-effective filter-less Class D stereo audio power amplifier that operates in wide range of various power supplies.     

VA2218 provide gain control with simple voltage dividers. 

VA2218 can output 30W per channel into 4Ω or 8Ωload with lower supply current and fewer external components for driving bridged-tied stereo speaker directly. Five different PWM frequency ad-justment  makes VA2218  is  suitable  for any  con-sumer electronics especially for high power output audio speakers.With the function of power limit, the speakers  could be operated  safely and  the in-put signal would be also normalized.VA2218 operates with high efficiency energy con-version up to   90% (8Ω Load) so that the external heat sink can be eliminated while playing music.

VA2218 also  integrates  Anti-Pop,  Output  Short  & Over-Heat Protection Circuitry to ensure device re-liability.This device also provides the DC detect and protection scheme to prevent the  damage of speaker voice coils.The VA2218 is available in TSSOP-28 and TQFP-48 green package with exposed pad.


Features

-Operation Voltage from 4.5V to 26V

-Maximum 90% Efficiency with an 8Ω  Speaker

-30W@8Ω with THD+N <2% at 24V

-40W@4Ω with THD+N =1% at 21V

-30W@4Ω with THD+N =1% at 18V

-50W@4Ω with THD+N=10% at 18V (PBTL)

-60W@3Ω with THD+N<1% at 21V (PBTL)

-Multiple Switching Frequencies for AM Avoidance

-Optional Clock Master/Slave Synchronization 

-4 Segments Configurable PWM Frequency:400kHz/500kHz/600kHz/1MHz/1.2MHz

-Voltage-Divider Selectable Gain Settings

-Excellent EMI/EMC Performance 

-Scalable Power Limit Function

-Fault Indication Output Terminal

-Speaker DC Detection and Protection

-Parallel BTL Speaker Driving Connection

-Thermal Protection with Auto-Recovery

-Speaker Protection Circuitry

-Short Circuit and Thermal Protection

-RoHS 2.0 compliant  TSSOP-28 and  TQFP-48 

-Green Package with Exposed Pad


Applications

LCD TV

-Multimedia Speaker

-Aftermarket Automotive

-Sound Bar and Boombox


Typical Application
图片2.png

上一篇:VA2239

下一篇:SC3116

Copyright © 2018-2021 深圳市智芯科微电子有限公司 All Rights Reserved. 粤ICP备17051536号   网站地图  网站地图