CXAR41279桥梁捆绑荷载BTL立体声输入多路复用器提供静音和关机控制支持驱动扬声器的桥接负载BTL模式和驱动耳机的单端SE模式内部直流音量增益设置范围为0dB到-78dB

CXAR41279是一个立体声音频功率放大器在两个28针TSSOP和TQFN热垫封装。在5V电源电压下，桥连负载（BTL）模式下，可将2.0W连续均方根功率送入4Ω负载。在上述操作条件下，其THD小于1%。为了简化笔记本应用程序中的音频系统设计，CXAR41279支持驱动扬声器的桥接负载（BTL）模式和驱动耳机的单端（SE）模式。对于低电流消耗应用程序，支持关机模式以在CXAR41279空闲时禁用它。电流消耗可降低到2μA以下。内部直流音量增益设置范围为0dB到-78dB。我们可以激活内部的直流音量控制，设置模式引脚高，并设置音量值，以获得预期的直流音量增益。CXAR41279具有灵活的功能，用户可以通过增益选择引脚选择内部嵌入增益设置或外部增益。设置增益选择引脚低是激活内部增益设置，设置外部增益高。
Depop电路集成
·1%THD+N时的输出功率，VDD=5V
--2.0W/CH（典型）到4Ω负载
--1.3W/CH（典型）进入8Ω负载
·10%THD+N时的输出功率，VDD=5V
--2.6W/CH（典型）到4Ω负载
--1.6W/CH（典型）进入8Ω负载
最大输出功率夹紧电路集成
桥梁捆绑荷载（BTL）
·立体声输入多路复用器
提供静音和关机控制

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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The CXAR41279 is a stereo audio power amplifier in both 28pin TSSOP and TQFN thermal pad package. It can deliver 2.0W 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, CXAR41279 supports the Bridge-Tied Load (BTL) mode for driving the speakers, Single-End (SE) mode for driving the headphone. For the low current consumption applications, the Shutdown mode is supported to disable the CXAR41279 when it is idle. The current consumption can be reduced below 2μA. The internal DC volume gain setting is ranged from 0dB to -78dB. We can activate the internal DC volume control by setting the Mode pin high, and setting the Vol value to get the expected DC volume gain. The CXAR41279 is with the flexible for the user to select the internal embedded gain setting or external gains through the gain_sel pin. Setting the gain_sel pin low is to activate the internal gain settings, setting high for external gains.

   产品特点 返回TOP

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„ Depop Circuitry Integrated 

„ Output Power at 1% THD+N, VDD=5V 

--2.0W/CH (typical) into a 4Ω Load 

--1.3W/CH (typical) into a 8Ω Load 

„ Output Power at 10% THD+N, VDD=5V 

--2.6W/CH (typical) into a 4Ω Load 

--1.6W/CH (typical) into a 8Ω Load 

„ Maximum Output Power Clamping Circuitry Integrated 

„ Bridge-Tied Load (BTL) 

„ Stereo Input MUX 

„ Mute and Shutdown Control Available 

„ Surface-Mount Power Package 24-Pin TSSOP-P & 24-Pin QFN Available

   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