TPA2018D1 Datasheet, PDF (1/36 Pages) Texas Instruments – 3-W Mono Class-D Audio Amplifier with SmartGain AGC/DRC

TPA2018D1
www.ti.com ................................................................................................................................................................................................ SLOS592 – AUGUST 2009
3-W Mono Class-D Audio Amplifier with SmartGain™ AGC/DRC
FEATURES
1
•23 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
• Fast Start-up Time: 5 ms
• 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)
APPLICATIONS
• Wireless or Cellular Handsets and PDAs
• Portable Navigation Devices
• Portable DVD Player
• Notebook PCs
• Portable Radio
• Portable Games
• Educational Toys
• USB Speakers
DESCRIPTION
The TPA2018D1 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 WCSP
package.
The DRC/AGC function in the TPA2018D1 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
TPA2018D1 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.
In addition to these features, a fast start-up time and
small package size make the TPA2018D1 an ideal
choice for cellular handsets, PDAs and other portable
applications.
SIMPLIFIED APPLICATION DIAGRAM
To Battery
Analog
Baseband
or
CODEC
Digital
BaseBand
10 mF
PVDD
TPA2018D1
C_IN 1 mF
(Optional)
IN-
OUT+
IN+
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.
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 © 2009, Texas Instruments Incorporated