TPA6205A1_15 Datasheet, PDF (1/28 Pages) Texas Instruments – 1.25-W MONO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER WITH 1.8-V INPUT LOGIC THRESHOLDS

ZQV
DRB
DGN
TPA6205A1
www.ti.com .............................................................................................................................................................. SLOS490B – JULY 2006 – REVISED JUNE 2008
1.25-W MONO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER WITH 1.8-V INPUT
LOGIC THRESHOLDS
1FEATURES
•2 1.25 W Into 8Ω From a 5-V Supply at
THD = 1% (Typical)
• Shutdown Pin has 1.8V Compatible
Thresholds
• Low Supply Current: 1.7mA Typical
• Shutdown Current < 10µA
• 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
• 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
APPLICATIONS
• Designed for Wireless Handsets, PDAs, and
other mobile devices
• Compatible with Low Power (1.8V Logic) I/O
Threshold control signals
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.
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.
R_F
In From
DAC
- ^RI
+ ^RI
R_F
SHUTDOWN
C_(BYPASS)
(Optional)
V_DD
IN- _{_}
V_O+
IN+ ₊
V_O-
GND
Bias
Circuitry
To Battery
C_s
(1)_CB
R_I
R_I
Actual Solution Size
R_F
C_S
5,25 mm
R_F
6,9 mm
Applies to the ZQV Packages Only
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.
PowerPAD, MicroStar Junior are trademarks of Texas Instruments.
2
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 © 2006–2008, Texas Instruments Incorporated