Texas Instruments TPA4861EVM, TPA4861DR, TPA4861D Datasheet
TPA4861
1-W AUDIO POWER AMPLIFIER
SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
1-W BTL Output (5 V, 0.11 % THD+N)
D
3.3-V and 5-V Operation
D
No Output Coupling Capacitors Required
D
Shutdown Control (IDD = 0.6 µA)
D
Uncompensated Gains of 2 to 20 (BTL
Mode)
D
Surface-Mount Packaging
D
Thermal and Short-Circuit Protection
D
High Supply Ripple Rejection Ratio
(56 dB at 1 kHz)
D
LM4861 Drop-In Compatible
description
The TP A4861 is a bridge-tied load (BTL) audio power amplifier capable of delivering 1 W of continuous average
power into an 8-Ω load at 0.2% THD+N from a 5-V power supply in voiceband frequencies (f < 5 kHz). A BTL
configuration eliminates the need for external coupling capacitors on the output in most applications. Gain is
externally configured by means of two resistors and does not require compensation for settings of 2 to 20.
Features of the amplifier are a shutdown function for power-sensitive applications as well as internal thermal
and short-circuit protection. The TPA4861 works seamlessly with TI’s TPA4860 in stereo applications. The
amplifier is available in an 8-pin SOIC surface-mount package that reduces board space and facilitates
automated assembly .
Audio
Input
Bias
Control
V
DD
1 W
6
5
8
7
VO1
VO2
V
DD
1
2
34IN+
IN–
BYPASS
SHUTDOWN
VDD/2
C
I
R
I
R
F
C
S
C
B
–
+
–
+
GND
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 2000, 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
8
7
6
5
SHUTDOWN
BYPASS
IN+
IN–
V
O
2
GND
V
DD
VO1
D PACKAGE
(TOP VIEW)
TPA4861
1-W AUDIO POWER AMPLIFIER
SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
AVAILABLE OPTIONS
PACKAGED DEVICE
T
A
SMALL OUTLINE
†
(D)
–40°C to 85°C TPA4861D
†
The D package is available tape and reeled. To order a tape and
reeled part, add the suffix R to the part number (e.g., TP A4861DR).
Terminal Functions
TERMINAL
NAME NO.
I/O
DESCRIPTION
BYPASS 2 I
BYPASS is the tap to the voltage divider for internal mid-supply bias. This terminal should be connected
to a 0.1 µF – 1.0 µF capacitor when used as an audio power amplifier.
GND 7 GND is the ground connection.
IN– 4 I IN– is the inverting input. IN– is typically used as the audio input terminal.
IN+ 3 I IN+ is the noninverting input. IN+ is typically tied to the BYPASS terminal.
SHUTDOWN 1 I SHUTDOWN places the entire device in shutdown mode when held high (IDD ≤ 0.6 µA).
VO1 5 O VO1 is the positive BTL output.
VO2 8 O VO2 is the negative BTL output.
V
DD
6 VDD is the supply voltage terminal.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
‡
Supply voltage, VDD 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI –0.3 V to VDD +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, TJ –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
D 725 mW 5.8 mW/°C 464 mW 377 mW
recommended operating conditions
MIN MAX UNIT
Supply voltage, V
DD
2.7
5.5
V
p
VDD = 3 V
1.25
2.7
V
Common-mode input voltage, V
IC
VDD = 5 V
1.25
4.5
V
Operating free-air temperature, T
A
–40
85
°C
TPA4861
1-W AUDIO POWER AMPLIFIER
SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics at specified free-air temperature, VDD = 3.3 V (unless otherwise noted)
TPA4861
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
V
OO
Output offset voltage
See Note 1
20
mV
PSRR
Power supply rejection ratio (∆VDD/∆VOO)
VDD = 3.2 V to 3.4 V
75
dB
I
DD
Supply current
2.5
mA
I
DD(SD)
Supply current, shutdown
0.6
µA
NOTE 1: At 3 V < VDD < 5 V the dc output voltage is approximately VDD/2.
operating characteristics, VDD = 3.3 V, T
A
= 25°C, RL = 8 Ω
TPA4861
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
p
p
THD = 0.2%, f = 1 kHz,
AV = –2 V/V
400
mW
POOutput power, see Note 2
THD = 2%, f = 1 kHz,
AV = –2 V/V
500
mW
B
OM
Maximum output power bandwidth
Gain = –10 V/V ,
THD = 2%
20
kHz
B
1
Unity-gain bandwidth
Open Loop
1.5
MHz
pp
pp
BTL
f = 1 kHz,
CB = 0.1 µF
56
dB
Supply ripple rejection ratio
SE
f = 1 kHz,
CB = 0.1 µF
30
dB
V
n
Noise output voltage, see Note 3
Gain = –2 V/V
20
µV
NOTES: 2. Output power is measured at the output terminals of the device.
3. Noise voltage is measured in a bandwidth of 20 Hz to 20 kHz.
electrical characteristics at specified free-air temperature range, VDD = 5 V (unless otherwise
noted)
TPA4861
PARAMETER
TEST CONDITION
MIN TYP MAX
UNIT
V
OO
Output offset voltage
See Note 1
20
mV
PSRR
Power supply rejection ratio (∆VDD/∆VOO)
VDD = 4.9 V to 5.1 V
70
dB
I
DD
Supply current
3.5
mA
I
DD(SD)
Supply current, shutdown
0.6
µA
NOTE 1: At 3 V < VDD < 5 V the dc output voltage is approximately VDD/2.
operating characteristic, VDD = 5 V, T
A
= 25°C, RL = 8 Ω
TPA4861
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNIT
p
p
THD = 0.2%, f = 1 kHz,
AV = –2 V/V
1000
mW
POOutput power, see Note 2
THD = 2%, f = 1 kHz,
AV = –2 V/V
1100
mW
B
OM
Maximum output power bandwidth
Gain = –10 V/V ,
THD = 2%
20
kHz
B
1
Unity-gain bandwidth
Open Loop
1.5
MHz
pp
pp
BTL
f = 1 kHz,
CB = 0.1 µF
56
dB
Supply ripple rejection ratio
SE
f = 1 kHz,
CB = 0.1 µF
30
dB
V
n
Noise output voltage, see Note 3
Gain = –2 V/V
20
µV
NOTES: 2. Output power is measured at the output terminals of the device.
3. Noise voltage is measured in a bandwidth of 20 Hz to 20 kHz.
TPA4861
1-W AUDIO POWER AMPLIFIER
SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Table of Graphs
FIGURE
V
OO
Output offset voltage
Distribution
1,2
I
DD
Supply current distribution
vs Free-air temperature
3,4
ÁÁ
Á
THD+N
БББББББББ
Á
Total harmonic distortion plus noise
БББББББ
Á
vs Frequency
ÁÁ
Á
5,6,7,8,9,
10,11,15,
16,17,18
ÁÁÁБББББББББÁБББББББ
Á
vs Output power
ÁÁ
Á
12,13,14,
19,20,21
I
DD
Supply current
vs Supply voltage
22
V
n
Output noise voltage
vs Frequency
23,24
Maximum package power dissipation
vs Free-air temperature
25
Power dissipation
vs Output power
26,27
Maximum power output
vs Free-air temperature
28
p
p
vs Load resistance
29
Output power
vs Supply voltage
30
Open-loop gain
vs Frequency
31
k
SVR
Supply ripple rejection ratio
vs Frequency
32,33
TPA4861
1-W AUDIO POWER AMPLIFIER
SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 1
Number of Amplifiers
DISTRIBUTION OF TPA4861
OUTPUT OFFSET VOLTAGE
20
10
0
VOO – Output Offset Voltage – mV
25
15
5
VDD = 5 V
–4 –3 –2 –1 0 1 2 3 4 5 6
Figure 2
Number of Amplifiers
DISTRIBUTION OF TPA4861
OUTPUT OFFSET VOLTAGE
20
10
0
VOO – Output Offset Voltage – mV
25
15
5
–4 –3 –2 –1 0 1 2 3 4 5 6
VDD = 3.3 V
30
Figure 3
– Supply Current – mA
SUPPLY CURRENT DISTRIBUTION
vs
FREE-AIR TEMPERATURE
4
2.5
1.5
0.5
TA – Free-Air Temperature –°C
–40 25
3
2
1
VDD = 5 V
I
DD
3.5
85
5
4.5
Typical
Figure 4
– Supply Current – mA
SUPPLY CURRENT DISTRIBUTION
vs
FREE-AIR TEMPERATURE
3.5
2
1
0
TA – Free-Air Temperature –°C
–40 25
2.5
1.5
0.5
VDD = 3.3 V
I
DD
3
85
Typical
TPA4861
1-W AUDIO POWER AMPLIFIER
SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 5
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
FREQUENCY
20
10
1
0.1
0.01
100 1 k 10 k 20 k
f – Frequency – Hz
VDD = 5 V
PO = 1 W
AV = –2 V/V
RL = 8 Ω
CB = 0.1 µF
CB = 1 µF
THD+N – Total Harmonic Distortion Plus Noise – %
Figure 6
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
FREQUENCY
20
10
1
0.1
0.01
100 1 k 10 k 20 k
f – Frequency – Hz
VDD = 5 V
PO = 1 W
AV = –10 V/V
RL = 8 Ω
CB = 0.1 µF
CB = 1 µF
THD+N – Total Harmonic Distortion Plus Noise – %
Figure 7
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
FREQUENCY
20
10
1
0.1
0.01
100 1 k 10 k 20 k
f – Frequency – Hz
VDD = 5 V
PO = 1 W
AV = –20 V/V
RL = 8 Ω
CB = 0.1 µF
CB = 1 µF
THD+N – Total Harmonic Distortion Plus Noise – %
Figure 8
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
FREQUENCY
20
10
1
0.1
0.01
100 1 k 10 k 20 k
f – Frequency – Hz
VDD = 5 V
PO = 0.5 W
AV = –2 V/V
RL = 8 Ω
CB = 0.1 µF
CB = 1 µF
THD+N – Total Harmonic Distortion Plus Noise – %
TPA4861
1-W AUDIO POWER AMPLIFIER
SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 9
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
FREQUENCY
20
10
1
0.1
0.01
100 1 k 10 k 20 k
f – Frequency – Hz
VDD = 5 V
PO = 0.5 W
AV = –10 V/V
RL = 8 Ω
CB = 0.1 µF
CB = 1 µF
THD+N – Total Harmonic Distortion Plus Noise – %
Figure 10
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
FREQUENCY
20
10
1
0.1
0.01
100 1 k 10 k 20 k
f – Frequency – Hz
THD+N – Total Harmonic Distortion Plus Noise – %
VDD = 5 V
PO = 0.5 W
AV = –20 V/V
RL = 8 Ω
CB = 0.1 µF
CB = 1 µF
Figure 11
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
FREQUENCY
20
10
1
0.1
0.01
100 1 k 10 k 20 k
f – Frequency – Hz
THD+N – Total Harmonic Distortion Plus Noise – %
VDD = 5 V
AV = –10 V/V
Single Ended
RL = 8 Ω
PO = 250 mW
RL = 32 Ω
PO = 60 mW
Figure 12
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
OUTPUT POWER
0.02
10
1
0.1
0.01
0.1 1
PO – Output Power – W
THD+N – Total Harmonic Distortion Plus Noise – %
VDD = 5 V
AV = –2 V/V
RL = 8 Ω
f = 20 Hz
CB = 0.1 µF
2
CB = 1 µF
TPA4861
1-W AUDIO POWER AMPLIFIER
SLOS163B – SEPTEMBER 1996 – REVISED MARCH 2000
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 13
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
OUTPUT POWER
0.02
10
1
0.1
0.01
0.1 1
PO – Output Power – W
THD+N – Total Harmonic Distortion Plus Noise – %
VDD = 5 V
AV = –2 V/V
RL = 8 Ω
f = 1 kHz
2
CB = 0.1 µF
CB = 1 µF
Figure 14
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
OUTPUT POWER
0.02
10
1
0.1
0.01
0.1 1
PO – Output Power – W
THD+N – Total Harmonic Distortion Plus Noise – %
VDD = 5 V
AV = –2 V/V
RL = 8 Ω
f = 20 kHz
CB = 0.1 µF
2
CB = 1 µF
Figure 15
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
FREQUENCY
20
10
1
0.1
0.01
100 1 k 10 k 20 k
f – Frequency – Hz
THD+N – Total Harmonic Distortion Plus Noise – %
VDD = 3.3 V
PO = 350 mW
RL = 8 Ω
AV = –2 V/V
CB = 0.1 µF
CB = 1 µF
Figure 16
TOTAL HARMONIC DISTORTION PLUS NOISE
vs
FREQUENCY
20
10
1
0.1
0.01
100 1 k 10 k 20 k
f – Frequency – Hz
THD+N – Total Harmonic Distortion Plus Noise – %
VDD = 3.3 V
PO = 350 mW
RL = 8 Ω
AV = –10 V/V
CB = 1 µF
CB = 0.1 µF
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