TPA2031D1 Datasheet, PDF (1/24 Pages) Texas Instruments – 2.5-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER

TPA2031D1
www.ti.com........................................................................................................................................................................................................ SLOS546 – MAY 2008
2.5-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
FEATURES
1
•2 Pin-to-Pin Compatibility with TPA2010D1
• 32 ms Start-up Time Eliminates CODEC
Click/Pop noise
• Maximum Battery Life and Minimum Heat
– Efficiency With an 8-Ω Speaker:
– 88% at 400 mW
– 2.8-mA Quiescent Current
– 0.5-µA Shutdown Current
• Only Three External Components
– Optimized PWM Output Stage Eliminates
LC Output Filter
– Improved PSRR (–75 dB) and Wide Supply
Voltage (2.5 V to 5.5 V) Eliminates Need for
a Voltage Regulator
– Fully Differential Design Reduces RF
Rectification and Eliminates Bypass
Capacitor
– Improved CMRR Eliminates Two Input
Coupling Capacitors
• Wafer Chip Scale Packaging (WCSP)
– NanoFree™ (YZF)
APPLICATIONS
• Ideal for Wireless or Cellular Handsets and
PDAs
DESCRIPTION
The TPA2031D1 is a 2.5-W high efficiency filter-free
class-D audio power amplifier in a 1,45 mm × 1,45
mm wafer chip scale package (WCSP) that requires
only three external components.
Features like 88% efficiency, –75-dB PSRR,
improved RF-rectification immunity, and 8 mm² total
PCB area make the TPA2031D1 class-D amp ideal
for cellular handsets. 32 ms start-up time allows the
TPA2031D1 to share the same GPIO
enable/shutdown control as the CODEC without
passing through the CODEC turn-on pop.
In cellular handsets, the earpiece, speaker phone,
and melody ringer can each be driven by the
TPA2031D1. The TPA2031D1 allows independent
gain while summing signals from separate sources,
and has a low 36 µV noise floor, A-weighted.
APPLICATION CIRCUIT
+ ^RI
Differential
Input
- ^RI
SHUTDOWN
Internal
Oscillator
To Battery
V_DD
C_S
IN-
_
+
IN+
PWM
H-
V_O+
Bridge
V_O-
Bias
Circuitry
GND
TPA2031D1
9-BALL
WAFER CHIP SCALE
YZF PACKAGE
TPA2031D1 DIMENSIONS
(TOP VIEW OF PCB)
IN+
GND
V_O-
A1
A2
A3
1,55 mm
V_DD
PV_DD
GND
1,40 mm
B1
B2
B3
IN- SHUTDOWN V_O+
C1
C2
C3
1,55 mm
1,40 mm
Note: Pin A1 is marked with a “0” for
Pb-free (YZF).
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.
NanoFree is a trademark 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 © 2008, Texas Instruments Incorporated