TPA2005D1DRBRG4 Datasheet, PDF (1/32 Pages) Texas Instruments – 1.4-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER

TPA2005D1
www.ti.com............................................................................................................................................................... SLOS369F – JULY 2002 – REVISED JULY 2008
1.4-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
FEATURES
1
•2 1.4 W Into 8 Ω From a 5 V Supply at
THD = 10% (Typ)
• Maximum Battery Life and Minimum Heat
– Efficiency With an 8-Ω Speaker:
– 84% at 400 mW
– 79% at 100 mW
– 2.8-mA Quiescent Current
– 0.5-µA Shutdown Current
• Capable of Driving an
8-Ω Speaker (2.5 V ≤ V_DD ≤ 5.5 V) and a
4-Ω Speaker (2.5 V ≤ V_DD ≤ 4.2 V)
• Only Three External Components
– Optimized PWM Output Stage Eliminates
LC Output Filter
– Internally Generated 250-kHz Switching
Frequency Eliminates Capacitor and
Resistor
– Improved PSRR (-71 dB at 217 Hz) 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
• Space Saving Package
– 3 mm × 3 mm QFN package (DRB)
– 2,5 mm × 2,5 mm MicroStar Junior™
BGA Package (ZQY)
– 3 mm x 5 mm MSOP PowerPAD™ Package
(DGN)
– TPA2010D1 Available in 1,45 mm × 1,45 mm
WCSP (YZF)
• Use TPA2006D1 for 1.8 V Logic Compatibility
on Shutdown Pin
APPLICATIONS
• Ideal for Wireless or Cellular Handsets and
PDAs
DESCRIPTION
The TPA2005D1 is a 1.4-W high efficiency filter-free
class-D audio power amplifier in a MicroStar Junior™
BGA, QFN, or MSOP package that requires only
three external components.
Features like 84% efficiency, -71-dB PSRR at 217
Hz, improved RF-rectification immunity, and 15 mm²
total PCB area make the TPA2005D1 ideal for
cellular handsets. A fast start-up time of 9 ms with
minimal pop makes the TPA2005D1 ideal for PDA
applications.
In cellular handsets, the earpiece, speaker phone,
and melody ringer can each be driven by the
TPA2005D1. The device allows independent gain
control by summing the signals from each function
while minimizing noise to only 48 µV_RMS.
The TPA2005D1 has short-circuit and thermal
protection.
APPLICATION CIRCUIT
To Battery
Internal
V_DD
Oscillator
C_S
+ ^RI IN–
V_O+
_
PWM
H–
Differential
Bridge
Input
– ^RI IN+
+
V_O–
R_I
SHUTDOWN
Bias
Circuitry
GND
R_I
TPA2005D1
Actual Solution Size
(MicroStar Junior BGA)
C_S
2.5 mm
6 mm
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.
MicroStar Junior, PowerPAD 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 © 2002–2008, Texas Instruments Incorporated