TAS2553_15 Datasheet, PDF (1/58 Pages) Texas Instruments – TAS2553 2.8-W Class-D Mono Audio Amplifier with Class-G Boost and Speaker Sense

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TAS2553
SLAS978B – SEPTEMBER 2013 – REVISED FEBRUARY 2014
TAS2553 2.8-W Class-D Mono Audio Amplifier with Class-G Boost and Speaker Sense
1 Features
•1 Analog or Digital Input Mono Boosted Class-D
Amplifier
• 2.8 W into 8 Ω Load from 3.6 V Supply (1%
THD+N)
• Efficiency of 86% at Rated Power
• I2S, Left-Justified, Right-Justified, DSP, PDM, and
TDM Input and Output Interface
• Input Sample Rates from 8 kHz to 192 kHz
• High Efficiency Class-G Boost Converter
– Automatically Adjusts Class-D Supply
• Built-In Speaker Sense
– Measures Speaker Current and Voltage
– Measures VBAT and VBOOST Voltages
• Built-In Automatic Gain Control (AGC)
– Limits Battery Current Consumption
• Adjustable Class-D Switching Edge-Rate Control
• Power Supplies
– Boost Input: 3.0 V to 5.5 V
– Analog: 1.65 V to 1.95 V
– Digital I/O: 1.5 V to 3.6 V
• Thermal and Short-Circuit Protection
• I²C Interface for Register Control
• Stereo Configuration Using Two TAS2553s
– I²C Address Select Terminal (ADDR)
• 2.855 mm x 2.575 mm, 0.4 mm Pitch 30-Ball
WCSP
2 Applications
• Mobile Phones
• PND
• Portable Audio Docks
• Tablets
• Gaming Devices
3 Description
The TAS2553 is a high efficiency Class-D audio
power amplifier with advanced battery current
management and an integrated Class-G boost
converter. The device constantly measures the
current and voltage across the load and provides a
digital stream of this information.
The Class-G boost converter generates the Class-D
amplifier supply rail. During low Class-D output
power, the boost improves efficiency by deactivating
and connecting VBAT directly to the Class-D amplifier
supply. When high power audio is required, the boost
quickly activates to provide significantly louder audio
than a stand-alone amplifier connected directly to the
battery.
The AGC automatically adjusts Class-D gain to
reduce battery current at end-of-charge voltages,
preventing output clipping, distortion and early system
shutdown. The fixed gain is adjustable via I²C. The
gain range is -7 dB to +24 dB in 1 dB steps.
In addition to a differential mono analog input, the
TAS2553 has built-in a 16-bit D/A converter used with
a digital input. Moving the D/A converter from the
digital host processor into the integrated amplifier
process provides better dynamic performance at
lower system cost. Additionally, since the PCB routing
is digital rather than analog, sensitivity to external
perturbations such as GSM frame-rate noise is
decreased at the system level.
Device Information
ORDER NUMBER PACKAGE
BODY SIZE
TAS2553YFF
WCSP (30)
2.855 mm x 2.575 mm
+
Audio
Input _-
PDM CLK
MCLK
I2S
4
I2C
3
Enable
VBAT
2.2 uH
2 SW
10 nF
VREG
VBOOST
PVDD
TAS2553
Ferrite bead
(opt.)
OUT+
OUT-
Ferrite bead
(opt.)
VSENSE+
VSENSE-
22 uF
+
To
- Speaker
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.