CXAR41277全差分输入内部增益控制消除外部增益设置电阻集成的Depop电路立体声音频功率放大器在5V电源电压下桥连负载BTL模式将2W连续均方根功率驱动至每通道4Ω负载放大器增益由两个终端GAIN0 GAIN1内部配置和控制

CXAR41277是一款立体声音频功率放大器，采用20针TSSOP热敏垫封装或20针TQFN 4X4。在5V电源电压下，以桥连负载（BTL）模式将2W连续均方根功率驱动至每通道4Ω负载。在上述操作条件下，其THD小于1%。为了简化笔记本电脑应用中的音频系统设计并提高驱动功率，CXAR41277支持桥接负载（BTL）模式驱动扬声器。对于低电流消耗的应用程序，支持SHDN模式在CXAR41277空闲时禁用它。电流消耗可以降低到150μA（通常）。放大器增益由两个终端（GAIN0，GAIN1）内部配置和控制。提供6dB、10dB、15.6dB、21.6dB的BTL增益设置。
“内部增益控制，消除外部增益设置电阻”集成的Depop电路
·1%THD+N时的输出功率，VDD=5V
--2.0W/CH（典型）到4Ω负载
--1.2W/CH（典型）进入8Ω负载
支撑桥梁捆绑荷载（BTL）
·全差分输入
·关闭控制可用
表面贴装电源包

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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   CXAR41277 is a stereo audio power amplifier in 20pin TSSOP thermal pad package or 20-pin TQFN 4X4. It can drive 2W continuous RMS power into 4Ω load per channel in Bridge-Tied Load (BTL) mode at 5V supply voltage. Its THD is smaller than 1% under the above operation condition. To simplify the audio system design in the notebook application and to enlarge the driving power, CXAR41277 supports the Bridge-Tied Load (BTL) mode for driving the speakers. For the low current consumption applications, the SHDN mode is supported to disable CXAR41277 when it is idle. The current consumption can be reduced to 150μA (typically). Amplifier gain is internally configured and controlled by two terminals (GAIN0, GAIN1). BTL gain settings of 6dB, 10dB, 15.6dB, 21.6dB are provided.

   产品特点 返回TOP

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„ Internal Gain Control, Which Eliminates External Gain-Setting Resistors „ Depop Circuitry Integrated 

„ Output Power at 1% THD+N, VDD=5V 

--2.0W/CH (typical) into a 4Ω Load 

--1.2W/CH (typical) into a 8Ω Load 

„ Bridge-Tied Load (BTL) Supported 

„ Fully differential Input 

„ Shutdown Control Available 

„ Surface-Mount Power Package 

„ Over-Temperature Protection Embedded 20-Pin TSSOP-P & 20-Pin TQFN 4X4

   应用范围 返回TOP

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„ Stereo Power Amplifiers for Notebooks or Desktop Computers 

„ Multimedia Monitors 

„ Stereo Power Amplifiers for Portable Audio Systems

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

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Stereo Audio Amplifier
Part NO.	VDD  (V) min	VDD  (V) max	POUT THD=1%  (W,Ohm)	POUT(mW) THD=10% (W,Ohm)	PSRR  (dB)	Gain  setting	Enable  Active	Note	Package
CXAR41277	4.5	5.5	2.0, 4	2.5, 4	68	Fixed/ADJ	High	BTL, De-pop	TSSOP-20(FD)
CXAR41278	--	6	2.0,   4	2.6,   4	65	ADJ	Low/High	BTL, Mute, De-pop,  POUT(max) Clamping	TSSOP-24(FD)/   QFN4X4-24
CXAR41279	3	5.5	1.2,   4	2.0,   4	68	Fixed/ADJ	Low	DC  volume control,  PC-Beep	TSSOP-28(FD)/   TQFN5X5-28
CXAR41280	4.5	5.5	1.9,   4	2.6,   4	50	Fixed	High	BTL,   SE, OTP	SOP-16(FD)
CXAR41281	3	5.5	1.5,   4	2.1,   3	--	ADJ	Low/High	BTL,   De-pop	TQFN3X3-16