TPA2028D1 Datasheet, PDF (1/43 Pages) Texas Instruments – 3-W Mono Class-D Audio Amplifier with Fast Gain Ramp SmartGain™ AGC/DRC

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TPA2028D1
SLOS660C – JANUARY 2010 – REVISED OCTOBER 2015
TPA2028D1 3-W Mono Class-D Audio Amplifier With Fast Gain Ramp SmartGain™
AGC/DRC
1 Features
•1 Fast AGC Start-up Time: 5 ms
• Pinout Compatible with TPA2018D1
• Filter-Free Class-D Architecture
• 3 W Into 4 Ω at 5 V (10% THD+N)
• 880 mW Into 8 Ω at 3.6 V (10% THD+N)
• Power Supply Range: 2.5 V to 5.5 V
• Flexible Operation With/Without I²C™
• Programmable DRC/AGC Parameters
• Digital I²C™ Volume Control
• Selectable Gain from –28 dB to 30 dB in 1-dB
Steps (when compression is used)
• Selectable Attack, Release and Hold Times
• 4 Selectable Compression Ratios
• Low Supply Current: 1.8 mA
• Low Shutdown Current: 0.2 μA
• High PSRR: 80 dB
• AGC Enable/Disable Function
• Limiter Enable/Disable Function
• Short-Circuit and Thermal Protection
• Space-Saving Package
– 1.63 mm × 1.63 mm Nano-Free™ DSBGA
(YZF)
2 Applications
• Wireless or Cellular Handsets and PDAs
• Portable Navigation Devices
• Portable DVD Player
• Notebook PCs
• Portable Radio
• Portable Games
• Educational Toys
• USB Speakers
3 Description
The TPA2028D1 device is a mono, filter-free Class-D
audio power amplifier with volume control, fast gain
ramp SmartGain™, dynamic range compression
(DRC), and automatic gain control (AGC). It is
available in a 1.63 mm × 1.63 mm wafer chip-scale
package (DSBGA).
The DRC/AGC function in the TPA2028D1 device is
programmable through a digital I²C interface. The
DRC/AGC function can be configured to automatically
prevent distortion of the audio signal and enhance
quiet passages that are normally not heard. The
DRC/AGC can also be configured to protect the
speaker from damage at high power levels and
compress the dynamic range of music to fit within the
dynamic range of the speaker. The gain can be
selected from –28 dB to +30 dB in 1-dB steps. The
TPA2028D1 is capable of driving 3 W at 5 V into a
4-Ω load or 880 mW at 3.6 V into an 8-Ω load. The
device features hardware and software shutdown
controls and also provides thermal and short-circuit
protection. The TPA2028D1 has a faster AGC gain
ramp during start-up than TPA2018D1.
In addition to these features, a fast start-up time and
small package size make the TPA2028D1 an ideal
choice for cellular handsets, PDAs and other portable
applications.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPA2028D1
DSBGA (9)
1.63 mm x 1.63 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Application Diagram
To Battery
Analog
Baseband
or
CODEC
Digital
BaseBand
10 mF
PVDD
TPA2028D1
C_IN 1 mF
(Optional)
IN-
OUT+
IN+
I²C Clock
I²C Data
SCL
SDA
Master Enable _EN
OUT-
PGND
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.