
IN-
IN+
PGND
OUT+
OUT-
ToBattery
SDA
SCL
EN
MasterEnable
TPA2028D1
Digital
BaseBand
Analog
Baseband
or
CODEC
PVDD
10 F
m
C
1 F
(Optional)
IN
m
I CClock
2
I CData
2
SLOS660A
– JANUARY 2010 – REVISED MARCH 2011
3-W Mono Class-D Audio Amplifier with Fast Gain Ramp
SmartGain
AGC/DRC
1
FEATURES
DESCRIPTION
The TPA2028D1 is a mono, filter-free Class-D audio
23
Fast AGC Start-up Time: 5 ms
power amplifier with volume control, dynamic range
Pin-out Compatible with TPA2018D1
compression (DRC) and automatic gain control
Filter-Free Class-D Architecture
(AGC). It is available in a 1,63 mm x 1,63 mm wafer
chip-scale package (WCSP).
3 W Into 4
at 5 V (10% THD+N)
880 mW Into 8
at 3.6 V (10% THD+N)
The
DRC/AGC
function
in
the
TPA2028D1
is
programmable
via
a
digital
I2C
interface.
The
Power Supply Range: 2.5 V to 5.5 V
DRC/AGC function can be configured to automatically
Flexible Operation With/Without I2C
prevent distortion of the audio signal and enhance
Programmable DRC/AGC Parameters
quiet passages that are normally not heard. The
DRC/AGC can also be configured to protect the
Digital I2C
Volume Control
speaker from damage at high power levels and
Selectable Gain from
–28 dB to 30 dB in 1-dB
compress the dynamic range of music to fit within the
Steps (when compression is used)
dynamic range of the speaker. The gain can be
Selectable Attack, Release and Hold Times
selected from
–28 dB to +30 dB in 1-dB steps. The
TPA2028D1 is capable of driving 3 W at 5 V into 4
4 Selectable Compression Ratios
load or 880 mW at 3.6 V into 8 load. The device
Low Supply Current: 1.8 mA
features hardware and software shutdown controls
Low Shutdown Current: 0.2
μA
and also provides thermal and short-circuit protection.
The TPA2028D1 has faster AGC gain ramp during
High PSRR: 80 dB
start-up than TPA2018D1.
AGC Enable/Disable Function
In addition to these features, a fast start-up time and
Limiter Enable/Disable Function
small package size make the TPA2028D1 an ideal
Short-Circuit and Thermal Protection
choice for cellular handsets, PDAs and other portable
Space-Saving Package
applications.
– 1,63 mm × 1,63 mm Nano-Free WCSP
SIMPLIFIED APPLICATION DIAGRAM
(YZF)
APPLICATIONS
Wireless or Cellular Handsets and PDAs
Portable Navigation Devices
Portable DVD Player
Notebook PCs
Portable Radio
Portable Games
Educational Toys
USB Speakers
1
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.
2
Fast Gain Ramp SmartGain, Nano-Free are trademarks of Texas Instruments.
3
I2C is a trademark of NXP Semiconductors.
PRODUCTION DATA information is current as of publication date.
Copyright
2010–2011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.