TPA2028D1_15 Datasheet, PDF (1/39 Pages) Texas Instruments – 3-W Mono Class-D Audio Amplifier with Fast Gain Ramp SmartGain™ AGC/DRC

TPA2028D1
www.ti.com
SLOS660B – JANUARY 2010 – REVISED SEPTEMBER 2012
3-W Mono Class-D Audio Amplifier with Fast Gain Ramp SmartGain™ AGC/DRC
Check for Samples: TPA2028D1
FEATURES
1
•23 Fast AGC Start-up Time: 5 ms
• Pin-out 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™ WCSP
(YZF)
DESCRIPTION
The TPA2028D1 is a mono, filter-free Class-D audio
power amplifier with volume control, dynamic range
compression (DRC) and automatic gain control
(AGC). It is available in a 1,63 mm x 1,63 mm wafer
chip-scale package (WCSP).
The DRC/AGC function in the TPA2028D1 is
programmable via 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 4
Ω load or 880 mW at 3.6 V into 8 Ω load. The device
features hardware and software shutdown controls
and also provides thermal and short-circuit protection.
The TPA2028D1 has 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.
SIMPLIFIED APPLICATION DIAGRAM
APPLICATIONS
• Wireless or Cellular Handsets and PDAs
• Portable Navigation Devices
• Portable DVD Player
• Notebook PCs
• Portable Radio
• Portable Games
• Educational Toys
• USB Speakers
To Battery
Analog
Baseband
or
CODEC
Digital
BaseBand
10 mF
C_IN 1 mF
(Optional)
IN-
IN+
PVDD
TPA2028D1
OUT+
I²C Clock
I²C Data
SCL
SDA
Master Enable
EN
OUT-
PGND
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.
Fast Gain Ramp SmartGain, Nano-Free are trademarks of Texas Instruments.
2
I²C is a trademark of NXP Semiconductors.
3
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 © 2010–2012, Texas Instruments Incorporated