TPA6020A2 Datasheet, PDF (1/25 Pages) Texas Instruments – 2.8-W STEREO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER

TPA6020A2
www.ti.com
SLOS458B – JULY 2005 – REVISED AUGUST 2005
2.8-W STEREO FULLY DIFFERENTIAL AUDIO POWER AMPLIFIER
FEATURES
• Ideal for Notebook PCs
• Fully Differential Architecture and High
PSRR (-80 dB) Provide Excellent RF
Rectification Immunity
• 2.8 W Into 3 Ω From a 5-V Supply at
THD = 10% (Typical)
• Very Low Crosstalk:
– -100 dB Typical at 5 V, 3 Ω
• 2.5-V to 5.5-V Operating Range
• Low Supply Current:
– 8 mA Typical at 5 V
– Shutdown Current: 80-nA Typical
• Fast Startup (27 ms) With Minimal Pop
• Internal Feedback Resistors Reduce
Component Count
• Thermally Enhanced QFN Packaging
APPLICATIONS
• Notebook PCs
• LCD TVs
DESCRIPTION
The TPA6020A2 is a 2.8-W stereo bridge-tied load
(BTL) amplifier designed to drive stereo speakers
with at least 3-Ω impedance. The device operates
from 2.5 V to 5.5 V, drawing only 8 mA of quiescent
supply current. The feedback resistors are internal,
allowing the gain to be set with only two input
resistors per channel. The amplifier's fully differential
architecture performs with -80 dB of power supply
rejection from 20 Hz to 2 kHz, improved RF rectifi-
cation immunity, small PCB area, and a fast startup
time with minimal pop, making the TPA6020A2 ideal
for notebook PC applications.
APPLICATION CIRCUIT
In From
DAC
- ^RI
+ ^RI
40 kW
17 RIN- _{_}
16 RIN+ ₊
40 kW
19
RVDD
ROUT+ 1
ROUT- 3
To Supply
20-PIN QFN (RGW) PACKAGE
(TOP VIEW)
14
SHUTDOWN
100 kW
Bias
9 Circuitry
100 kW
C_(RBYPASS)
15
(See note A)
C_(LBYPASS)
11
GND
2, 5, Thermal Pad
In From
DAC
- ^RI
+ ^RI
40 kW
13 LIN- _{_}
12 LIN+ ₊
40 kW
LOUT+ 4
LOUT- 6
LVDD 7
To Supply
20 19 18 17 16
ROUT+ ¹
GND 2
ROUT- ³
LOUT+ 4
GND ⁵
15 RBYPASS
14 RS/D
13 LIN-
12 LIN+
11 LBYPASS
6 7 8 9 10
A. C_(LBYPASS) and C_(RBYPASS) are optional.
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.
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 © 2005, Texas Instruments Incorporated