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TPA2050D4

更新时间： 2024-09-24 03:58:47
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德州仪器 - TI 放大器输入元件
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29页 919K
描述
1.4 W/CH STEREO CLASS-D AUDIO SUBSYSTEM WITH DirectPath⑩ HEADPHONE AMPLIFIER AND 2:1 INPUT MUX

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TPA2050D4 数据手册

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TPA2050D4  
www.ti.com....................................................................................................................................................................................................... SLOS544–JULY 2008  
1.4 W/CH STEREO CLASS-D AUDIO SUBSYSTEM WITH DirectPath™ HEADPHONE  
AMPLIFIER AND 2:1 INPUT MUX  
1
FEATURES  
DESCRIPTION  
23  
•
Stereo Class-D Amp:  
–
–
1.4 W into 8 Ω from 5.0 V (10% THD + N)  
1.25 W into 8 Ω from 5.0 V (1% THD + N)  
The TPA2050D4 features a stereo Class-D power  
amplifier along with a stereo DirectPath™ headphone  
amplifier. The TPA2050D4 has two stereo  
single-ended (SE) inputs that can be configured as  
one stereo differential input. Both input channels  
have a 32-step volume control and the DirectPath  
headphone amplifier has a 4-level gain control for  
coarse volume adjustment. All amplifiers have output  
short-circuit and thermal- overload protection.  
•
DirectPath™ Stereo Headphone Amplifier  
No Output Capacitors Required  
–
•
•
Gain Select for Headphone Amplifier  
Eight Programmable Maximum Headphone  
Voltage Limits  
•
Two Single-Ended or One Differential Stereo  
Input  
The Class-D amplifiers deliver 1.25 W into 8 Ω at 1%  
THD from a 5.0 V supply, and 700 mW from 3.6 V.  
The DirectPath headphone amplifier features an  
output voltage limiter to reduce the maximum output  
power to one of seven possible limits. The voltage  
limiter is programmed through the I2C interface.  
•
•
2:1 Input MUX with Mode Control  
32-Step Volume Control for Both Input  
Channels  
•
Independent Shutdown for Headphone and  
Class-D Amplifiers  
DirectPath eliminates the need for external DC-  
blocking output capacitors to the headphones. The  
built-in charge pump creates a negative supply  
voltage for the headphone amplifier, allowing a 0-V  
DC bias at the output.  
•
•
Short-Circuit and Thermal-Overload Protection  
±8 kV HBM ESD Protection on Headphone  
Outputs  
I2C™ Interface  
•
•
The DirectPath headphone amplifier gains are 0 dB  
(default), –6 dB, –12 dB, and –20 dB, selected  
through the I2C interface. This allows the headphone  
volume to be different from the loudspeaker volume if  
both are used simultaneously.  
25-Ball 2,61 mm × 2,61 mm WCSP  
APPLICATIONS  
•
•
•
•
Smart Phones / Cellular Phones  
Laptop Computers  
Portable Gaming  
Portable Media Players  
The TPA2050D4 has a 2:1 input MUX for audio  
source selection. The MUX has mode control which  
directs the input-to-output signal path. Mode and gain  
controls operate from  
interface.  
a 1.8 V  
compatible I2C  
SIMPLIFIED SYSTEM BLOCK DIAGRAM  
The voltage supply range for both the Class-D  
amplifiers and the headphone charge pump is 2.5 V  
to 5.5 V. The Class-D amplifiers use a combined 7  
mA and the headphone amplifier uses 10 mA of  
typical quiescent current. Total supply current  
reduces to less than 2µA.  
Left  
8 W Speaker  
(SE )  
Codec  
(MP3)  
Right  
(SE )  
TPA2050D4  
8 W Speaker  
Stereo Class-D  
plus  
DirectPath  
TM  
Left  
(SE )  
The TPA2050D4YZK is available in a 25-ball 2.61  
mm × 2.61 mm WCSP package.  
FM Tuner  
Stereo  
Headphone Jack  
Right  
(SE )  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
3
DirectPath is a trademark of Texas Instruments.  
I2C is a trademark of NXP Semiconductors.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008, Texas Instruments Incorporated  
1234567...29

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TPA2050D4 替代型号

型号 品牌 替代类型 描述 数据表
TPA6132A2 TI

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