TPA0212
STEREO 2-W AUDIO POWER AMPLIFIER
WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL
SLOS284 NOVEMBER 1999
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Compatible With PC 99 Desktop Line-Out
Into 10-k
Load
D
Internal Gain Control, Which Eliminates
External Gain-Setting Resistors
D
2-W/Ch Output Power Into 3-
Load
D
Input MUX Select Terminal
D
PC-Beep Input
D
Depop Circuitry
D
Stereo Input MUX
D
Fully Differential Input
D
Low Supply Current and Shutdown Current
D
Surface-Mount Power Packaging
24-Pin TSSOP PowerPAD
TM
description
The TPA0212 is a stereo audio power amplifier in a 24-pin TSSOP thermally enhanced package capable of
delivering 2 W of continuous RMS power per channel into 3-
loads. This device minimizes the number of
external components needed, simplifying the design, and freeing up board space for other features. When
driving 1 W into 8-
speakers, the TPA0212 has less than 0.8% THD+N across its specified frequency range.
Included within this device is integrated depop circuitry that virtually eliminates transients that cause noise in
the speakers.
Amplifier gain is internally configured and controlled by way of two terminals (GAIN0 and GAIN1). BTL gain
settings of 2, 6, 12, and 24 V/V are provided, while SE gain is always configured as 1 V/V for headphone drive.
An internal input MUX allows two sets of stereo inputs to the amplifier. The HP/LINE terminal allows the user
to select which MUX input is active regardless of whether the amplifier is in SE or BTL mode. In notebook
applications, where internal speakers are driven as BTL and the line outputs (often headphone drive) are
required to be SE, the TPA0212 automatically switches into SE mode when the SE/BTL input is activated, and
this reduces the gain to 1 V/V.
The TPA0212 consumes only 6 mA of supply current during normal operation. A miserly shutdown mode
reduces the supply current to less than 150
A.
The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable only
in TO-220-type packages. Thermal impedances of approximately 35
C/W are readily realized in multilayer PCB
applications. This allows the TPA0212 to operate at full power into 8-
loads at an ambient temperature of 85
C.
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.
Copyright
1999, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
PWP PACKAGE
(TOP VIEW)
GND
GAIN0
GAIN1
LOUT+
LLINEIN
LHPIN
PV
DD
RIN
LOUT
LIN
BYPASS
GND
GND
RLINEIN
SHUTDOWN
ROUT+
RHPIN
V
DD
PV
DD
HP/LINE
ROUT
SE/BTL
PC-BEEP
GND
PowerPAD is a trademark of Texas Instruments Incorporated.
TPA0212
STEREO 2-W AUDIO POWER AMPLIFIER
WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL
SLOS284 NOVEMBER 1999
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
functional block diagram
ROUT+
+
+
R
MUX
Depop
Circuitry
Power
Management
+
+
L
MUX
RHPIN
RLINEIN
RIN
LHPIN
LLINEIN
LIN
ROUT
PVDD
VDD
BYPASS
SHUTDOWN
GND
LOUT+
LOUT
PC-
Beep
Gain/
MUX
Control
PC-BEEP
GAIN0
GAIN1
SE/BTL
HP/LINE
TPA0212
STEREO 2-W AUDIO POWER AMPLIFIER
WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL
SLOS284 NOVEMBER 1999
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
AVAILABLE OPTIONS
PACKAGED DEVICE
TA
TSSOP
(PWP)
40
C to 85
C
TPA0212PWP
The PWP package is available taped and
reeled. To order a taped and reeled part, add
the suffix R to the part number (e.g.,
TPA0212PWPR).
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
BYPASS
11
Tap to voltage divider for internal mid-supply bias generator
GAIN0
2
I
Bit 0 of gain control
GAIN1
3
I
Bit 1 of gain control
GND
1, 12,
13, 24
Ground connection for circuitry. Connected to the thermal pad.
LHPIN
6
I
Left channel headphone input, selected when SE/BTL is held high
LIN
10
I
Common left input for fully differential input. AC ground for single-ended inputs.
LLINEIN
5
I
Left channel line input, selected when SE/BTL is held low
LOUT+
4
O
Left channel positive output in BTL mode and positive output in SE mode
LOUT
9
O
Left channel negative output in BTL mode and high-impedance in SE mode
PC-BEEP
14
I
The input for PC Beep mode. PC-BEEP is enabled when a > 1-V (peak-to-peak) square wave is input
to PC-BEEP or PCB ENABLE is high.
HP/LINE
17
I
HP/LINE is the input MUX control input. When the HP/LINE terminal is held high, the headphone inputs
(LHPIN or RHPIN [6, 20]) are active. When the HP/LINE terminal is held low, the line BTL inputs (LLINEIN
or RLINEIN [5, 23]) are active.
PVDD
7, 18
I
Power supply for output stage
RHPIN
20
I
Right channel headphone input, selected when SE/BTL is held high
RIN
8
I
Common right input for fully differential input. AC ground for single-ended inputs.
RLINEIN
23
I
Right channel line input, selected when SE/BTL is held low
ROUT+
21
O
Right channel positive output in BTL mode and positive output in SE mode
ROUT
16
O
Right channel negative output in BTL mode and high-impedance in SE mode
SHUTDOWN
22
I
Places entire IC in shutdown mode when held low, except PC-BEEP remains active
SE/BTL
15
I
Hold SE/BTL low for BTL mode and hold high for SE mode.
VDD
19
I
Analog VDD input supply. This terminal needs to be isolated from PVDD to achieve highest performance.
TPA0212
STEREO 2-W AUDIO POWER AMPLIFIER
WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL
SLOS284 NOVEMBER 1999
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, V
DD
6 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
0.3 V to V
DD
+0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation
internally limited (see Dissipation Rating Table)
. . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
40
C to 85
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating junction temperature range, T
J
40
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
260
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DISSIPATION RATING TABLE
PACKAGE
TA
25
C
DERATING FACTOR
TA = 70
C
TA = 85
C
PWP
2.7 W
21.8 mW/
C
1.7 W
1.4 W
Please see the Texas Instruments document, PowerPAD Thermally Enhanced Package Application Report
(literature number SLMA002), for more information on the PowerPAD package. The thermal data was
measured on a PCB layout based on the information in the section entitled
Texas Instruments Recommended
Board for PowerPAD on page 33 of the before mentioned document.
recommended operating conditions
MIN
MAX
UNIT
Supply voltage, VDD
4.5
5.5
V
High level input voltage VIH
SE/BTL, HP/LINE
4
V
High-level input voltage, VIH
SHUTDOWN
2
V
Low level input voltage VIL
SE/BTL, HP/LINE
3
V
Low-level input voltage, VIL
SHUTDOWN
0.8
V
Operating free-air temperature, TA
40
85
C
electrical characteristics at specified free-air temperature, V
DD
= 5 V, T
A
= 25
C (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
|VOO|
Output offset voltage (measured differentially)
VI = 0, Av = 2 V/V
25
mV
PSRR
Power supply rejection ratio
VDD = 4 V to 5 V
77
dB
|IIH|
High-level input current
VDD = 5.5 V,
VI = VDD
900
nA
|IIL|
Low-level input current
VDD = 5.5 V,
VI = 0 V
900
nA
IDD
Supply current
BTL mode
6
8
mA
IDD
Supply current
SE mode
3
4
mA
IDD(SD)
Supply current, shutdown mode
150
300
A
TPA0212
STEREO 2-W AUDIO POWER AMPLIFIER
WITH FOUR SELECTABLE GAIN SETTINGS AND MUX CONTROL
SLOS284 NOVEMBER 1999
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
operating characteristics, V
DD
= 5 V, T
A
= 25
C, R
L
= 8
, Gain = 2 V/V, BTL mode
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
PO
Output power
THD = 1%,
RL = 4
f = 1 kHz,
1.9
W
THD + N
Total harmonic distortion plus noise
PO = 1 W,
f = 20 Hz to 15 kHz
0.75%
BOM
Maximum output power bandwidth
THD = 5%
>15
kHz
Supply ripple rejection ratio
f = 1 kHz,
CB = 0.47
F
BTL mode
68
dB
SNR
Signal-to-noise ratio
105
dB
V
Noise output voltage
CB = 0.47
F,
BTL mode
16
V RMS
Vn
Noise output voltage
B
,
f = 20 Hz to 20 kHz
SE mode
30
V RMS
ZI
Input impedance
See Table 1
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
vs Output power
1, 47, 1013,
1619, 21
THD+N
Total harmonic distortion plus noise
vs Frequency
2, 3, 8, 9, 14,
15, 20, 22
vs Output voltage
23
Vn
Output noise voltage
vs Bandwidth
24
Supply ripple rejection ratio
vs Frequency
25, 26
Crosstalk
vs Frequency
2729
Shutdown attenuation
vs Frequency
30
SNR
Signal-to-noise ratio
vs Frequency
31
Closed loop respone
3235
PO
Output power
vs Load resistance
36, 37
PD
Power dissipation
vs Output power
38, 39
PD
Power dissipation
vs Ambient temperature
40
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