TPA2005D1-Q1 Datasheet, PDF (1/24 Pages) Texas Instruments – 1.4-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER

TPA2005D1-Q1
www.ti.com
SLOS474 – AUGUST 2005
1.4-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
FEATURES
• Qualification in Accordance With AEC-Q100 ⁽¹⁾
• Qualified for Automotive Applications
• Customer-Specific Configuration Control Can
Be Supported Along With Major-Change
Approval
• 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
• 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
(1) Contact factory for details. Q100 qualification data available
on request.
• Space Saving Package
– 3 mm x 3 mm QFN package (DRB)
– 2,5 mm x 2,5 mm MicroStar Junior™
BGA Package (ZQY)
– 3 mm x 5 mm MSOP PowerPAD™ Package
(DGN)
– TPA2010D1 Available in 1,45 mm x 1,45 mm
WCSP (YZF)
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.
APPLICATION CIRCUIT
To Battery
Internal
V_DD
Oscillator
C_S
+ ^RI IN–
_
PWM
H–
V_O+
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
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.
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 © 2005, Texas Instruments Incorporated