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TPA6205A1_17

更新时间： 2024-11-21 02:58:27
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
26页 996K
描述
1.25-W Mono Fully Differential Audio Power Amplifier With 1.8-V Input logic Thresholds

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TPA6205A1_17 数据手册

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TPA6205A1  
ZQV  
DRB  
DGN  
www.ti.com  
SLOS490A–JULY 2006–REVISED AUGUST 2006  
1.25-W MONO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER WITH 1.8-V INPUT  
LOGIC THRESHOLDS  
FEATURES  
APPLICATIONS  
•
Designed for Wireless Handsets, PDAs, and  
other mobile devices  
•
1.25 W Into 8Ω From a 5-V Supply at  
THD = 1% (Typical)  
•
Compatible with Low Power (1.8V Logic) I/O  
Threshold control signals  
•
Shutdown Pin has 1.8V Compatible  
Thresholds  
•
•
•
Low Supply Current: 1.7mA Typical  
Shutdown Current < 10µA  
DESCRIPTION  
The TPA6205A1 is a 1.25-W mono fully differential  
amplifier designed to drive a speaker with at least  
8-Ω impedance while consuming less than 37 mm2  
(ZQV package option) total printed-circuit board  
(PCB) area in most applications. This device  
operates from 2.5 V to 5.5 V, drawing only 1.7 mA of  
quiescent supply current. The TPA6205A1 is  
available in the space-saving 2 mm x 2 mm  
MicroStar Junior™ BGA package, and the space  
saving 3 mm x 3 mm QFN (DRB) package.  
Only Five External Components  
– Improved PSRR (90 dB) and Wide Supply  
Voltage (2.5V to 5.5V) for Direct Battery  
Operation  
– Fully Differential Design Reduces RF  
Rectification  
– Improved CMRR Eliminates Two Input  
Coupling Capacitors  
– C(BYPASS) Is Optional Due to Fully  
Differential Design and High PSRR  
Features like 85-dB PSRR from 90 Hz to 5 kHz,  
improved RF-rectification immunity, and small PCB  
area makes the TPA6205A1 ideal for wireless  
handsets. A fast start-up time of 4 µs with minimal  
pop makes the TPA6205A1 ideal for PDA  
applications.  
•
•
•
Available in 3 mm x 3 mm QFN Package  
(DRB)  
Available in an 8-Pin PowerPAD™ MSOP  
(DGN)  
Avaliable in a 2 mm x 2 mm MicroStar  
Junior™ BGA Package (ZQV)  
APPLICATION CIRCUIT  
Actual Solution Size  
V
DD  
R
F
To Battery  
R
F
C
s
R
I
-
IN-  
C
V
_
+
O+  
S
(1)  
C
B
In From  
DAC  
5,25 mm  
R
I
V
O-  
+
IN+  
R
I
R
I
R
F
GND  
SHUTDOWN  
Bias  
Circuitry  
R
F
6,9 mm  
C BYPASS  
(
)
(Optional)  
Applies to the ZQV Packages Only  
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.  
PowerPAD, MicroStar Junior are trademarks of Texas Instruments.  
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 © 2006, Texas Instruments Incorporated  
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