TPA2005D1-Q1_15 Datasheet, PDF (1/29 Pages) Texas Instruments – 1.4-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER

TPA2005D1-Q1
www.ti.com
SLOS474C – AUGUST 2005 – REVISED MARCH 2010
1.4-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
Check for Samples: TPA2005D1-Q1
FEATURES
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• Qualified for Automotive Applications
• 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-mA 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
• Space-Saving Packages
– 3 mm x 3 mm QFN package (DRB)
– 3 mm x 5 mm MSOP PowerPAD™ Package
(DGN)
DESCRIPTION
The TPA2005D1 is a 1.4-W high-efficiency filter-free
class-D audio power amplifier in a 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 mV_RMS.
APPLICATION CIRCUIT
+ ^RI
Differential
Input
– ^RI
SHUTDOWN
Internal
Oscillator
To Battery
V_DD
C_S
IN–
_
+
IN+
PWM
V_O+
H–
Bridge
V_O–
Bias
Circuitry
GND
TPA2005D1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
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