TPA2025D1 Datasheet, PDF (1/23 Pages) Texas Instruments – 2 W Constant Output Power Class-D Audio Amplifier with Class-G Boost Converter

YZG
TPA2025D1
www.ti.com
SLOS717A – AUGUST 2011 – REVISED FEBRUARY 2012
2 W Constant Output Power Class-D Audio Amplifier with Class-G Boost Converter and
Battery Tracking AGC
Check for Samples: TPA2025D1
FEATURES
1
• Built-In Enhanced Battery Tracking Automatic
Gain Control (AGC)
– Limits Battery Current Consumption
• 1.9 W into 8 Ω Load from 3.6 V Supply (1%
THD+N)
• Integrated Adaptive Boost Converter
– Increases Efficiency at Low Output Power
• Low Quiescent Current of 2 mA from 3.6 V
• Thermal and Short-Circuit Protection with
Auto Recovery
• 20 dB Fixed Gain
• Similar Performance to TPA2015D1
• Available in 1.53 mm × 1.982 mm,
0.5 mm pitch 12-ball WCSP Package
APPLICATIONS
• Cell Phones
• PDA, GPS
• Portable Electronics and Speakers
DESCRIPTION
The TPA2025D1 is a high efficiency Class-D audio
power amplifier with battery tracking AGC technology
and an integrated Class-G boost converter that
enhances efficiency at low output power. It drives up
to 1.9 W into an 8 Ω speaker (1% THD+N). With 85%
typical efficiency, the TPA2025D1 helps extend
battery life when playing audio.
The built-in boost converter generates a 5.75 V
supply voltage for the Class-D amplifier. This
provides a louder audio output than a stand-alone
amplifier directly connected to the battery. The battery
tracking AGC adjusts the Class-D gain to limit battery
current at lower battery voltage.
The TPA2025D1 has an integrated low-pass filter to
improve the RF rejection and reduce DAC
out-of-band noise, increasing the signal-to-noise ratio
(SNR).
The TPA2025D1 is available in a space saving
1.53 mm × 1.982 mm, 0.5 mm pitch WCSP
package (YZG).
SIMPLIFIED APPLICATION DIAGRAM
Connected to Supply
2.2 mH
2.2 mF
Aud+io
Inpu-t
Enable
AGC
VBAT
IN+
SW PVDD
BGND
IN-
TPA2025D1 OUT+
EN
AGC _AGND
OUT-
PGND
6.8 mF - 22 mF
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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.
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 © 2011–2012, Texas Instruments Incorporated