TPA6021A4 Datasheet, PDF (1/26 Pages) Texas Instruments – 2-W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL

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2-W STEREO AUDIO POWER AMPLIFIER
WITH ADVANCED DC VOLUME CONTROL
TPA6021A4
SLOS465 – JUNE 2005
FEATURES
• 2 W Into 4-Ω Speakers With External Heatsink
• DC Volume Control With 2-dB
Steps from -40 dB to 20 dB
– Fade Mode
– -85-dB Mute Mode
• Differential Inputs
• 1-µA Shutdown Current (Typical)
• Headphone Mode
APPLICATIONS
• LCD Monitors
DESCRIPTION
The TPA6021A4 is a stereo audio power amplifier
that drives 2 W/channel of continuous RMS power
into a 4-Ω load when utilizing a heat sink. Advanced
dc volume control minimizes external components
and allows BTL (speaker) volume control and SE
(headphone) volume control.
The 20-pin DIP package allows for the use of a
heatsink which provides higher output power.
To ensure a smooth transition between active and
shutdown modes, a fade mode ramps the volume up
and down.
C_S
10 mF
Power Supply
1
PGND
2 _ROUT-
0.47 mF
3
PV_DD
20
ROUT+
19
SE/BTL
Right Positive
Differential Input Signal
C_{i 0.47 mF}
4
RIN+
Right Negative
C_i
0.47 mF
5
RIN-
Differential Input Signal
18
VOLUME
17
AGND
Left Negative
Differential Input Signal
V_DD
6
V_DD
0.47 mF
C_i
0.47 mF
7
LIN-
16
BYPASS
15
FADE
Left Positive ^Ci
Differential Input Signal
V_DD
Power Supply
0.47 mF
0.47 mF
8
LIN+
9 _PVDD
10
LOUT-
14
SHUTDOWN
13
NC
12
LOUT+
11
PGND
V_DD
100 kW
100 kW
In From DAC
or
Potentiometer
(DC Voltage)
C_(BYP)
0.47 mF
System
Control
Right
Speaker
C_O
330 mF
1 kW
Headphones
1 kW
C_O
330 mF
Left
Speaker
DC VOLUME CONTROL
30
20
10
0 ^{BTL Volume}
-10
-20
-30
-40
-50
-60
-70
-80
-90
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
Volume [Pin 18] - V
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