APA4863
Stereo 2.2W Audio Power Amplifier
Features
•
•
•
•
Depop Circuitry Integrated
Thermal Shutdown Circuitry Integrated
Bridge-Tied Load (BTL) or Single-Ended
(SE) Modes Operation
Output Power at 1% THD+N, V
DD
=5V
- 2.2W/Ch (typ) into a 3
Ω
Load
- 1.8W/Ch (typ) into a 4
Ω
Load
- 1.2 W/Ch (typ) into a 8
Ω
Load
General Description
The APA4863 is a stereo bridge-tied audio power am-
plifier in various power packages , including SOP ,
TSSOP and TSSOP-P . When connecting to a 5V volt-
age supply , the APA4863 is capable of delivering
2.2W/1.8W/1.2W of continuous RMS power per chan-
nel into 3Ω/4Ω/8Ω bridge-tied loads with less than
1% THD+N respectively . When APA4863 operates
in the single-ended load , it is capable of delivering
90mW of continuous RMS power per channel into
32Ω load . The APA4863 simplifies design and frees
up board space for other features .
The APA4863 also served well in low-voltage appli-
cations , which provides 750mW (1% THD+N) per
channel into 4Ω loads with a 3.3V supply voltage .
Both of the depop circuitry and the thermal shutdown
protection circuitry are integrated in the APA4863 ,
that reduces pops and clicks noise during power up
and when using the shutdown mode and protects the
chip from being destroyed by over-temperature fail-
ure . To simplify the audio system design in note-
book computer applications , the APA4863 combines
a stereo bridge-tied loads mode for speaker drive and
a stereo single-end mode for headphone drive into a
single chip , where both modes are easily switched
by the HP-IN input control pin signal . For power sen-
sitive applications , the APA4863 also features a shut-
down function which keeps the supply current only
0.5 µA (typ.) .
•
•
•
Shutdown Control Mode, I
SD
= 0.5 µA
Output Power (SE) at 0.5% THD+N, V
DD
=5V
- 90mW/Ch (typ.) into a 32Ω Load
Various Power Packages Available
SOP, TSSOP, TSSOP-P
Applications
•
•
•
Stereo Audio Power Amplifier for Notebook
Computer
Portable Televisions
Portable and Desktop Computers
Ordering Information
APA4863
Handling Code
Temp. Range
Package Code
Package Code
K: SOP
O: TSSOP
Temp. Range
I : -40 to 85
°
C
Handling Code
TU : Tube
TR : Tape & Reel
R: TSSOP-P*
TY: Tray
* TSSOP-P is a standard TSSOP package with a thermal pad exposed on the bottom of the package.
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise
customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
1
www.anpec.com.tw
APA4863
Block Diagram
V
DD
C
S
0.1µF
4, 13
6
8
- IN A
+ IN A*
C
O
5
Audio
Input
R
F
C
1
1
µF
C
B
2.2µF
Audio
Input
V
DD
/ 2
50KΩ
- IN B
+ IN B*
R
1
C
1
1
µF
V
DD
20KΩ
R
F
20KΩ
Shutdown
HP-IN
2,7,15
To Control Pin on
Headphone Jack
16
100KΩ
GND
*
+INA and +INB pins are connected to Bypass pin inside the IC.
Absolute Maximum Ratings
(Over operating free-air temperature range unless otherwise noted.)
Symbol
V
DD
T
A
T
J
T
STG
T
S
V
ESD
Parameter
Supply Voltage
Operating Ambient Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Soldering Temperature,10 seconds
Electrostatic Discharge
Rating
6
-40 to 85
150
-65 to +150
260
-2000 to 2000
*1
Note: *1. Human body model : C=100pF, R=1500Ω, 3 positive pulses plus 3 negative pulses
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
2
+
100ΚΩ
1
-
+
9
-
11
20KΩ
+
-
10
Bypass
50ΚΩ
+ OUT A
3
+
20KΩ
20KΩ
20KΩ
- OUT B
20KΩ
20KΩ
+ OUT B
14
12
20KΩ
-
R
1
20KΩ
- OUT A
+
R
L
8Ω
100µF
1KΩ
Control
Pin
Ring
To HP-IN Circuit
Sleeve
Tip
C
O
Headphone Jack
+
100µF
R
L
8Ω
1KΩ
Unit
V
°C
°C
°C
°C
V
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APA4863
Recommended Operating Conditions
Min.
Supply Voltage, V
DD
Operating free-air V
DD
=5V,
temperature, T
A
250mW/Ch average
power
V
DD
=5V,
1.8 W/Ch average
power
Common mode
V
DD
=5 V
input voltage, V
ICM
V
DD
=3.3V
4-Ω stereo BTL drive, with
proper PCB design
4-Ω stereo BTL drive, with
proper PCB design and 300
CFM forced-air cooling
3
-20
Typ.
5
Max.
5.5
85
Unit
V
°C
-20
85
1.25
1.25
4.5
2.7
V
Dissipation Rating Table
Package
SO16 +
TSSOP ++
TSSOP-P ++
Air Flow
(CFM)
0
0
200
0
200
Thermal Resistance
°
θ
JA
(°C/W)
50
73.2
66.6
37.6
32.3
T
A
≤
25°C
°
2.5W
1.7W
1.8W
3.3W
3.8W
T
A
=70°C
°
1.6W
1.1W
1.2W
2.1W
2.4W
+ : The parameter is measured with the recommended copper heat sink pattern on an 2-layer PCB, 11.7 in
2
3.0×2.4 in
2
in PCB,
1oz. copper, 3.0×1.5 in
2
in coverage at Top-layer and Bottom-layer at 100% coverage (7.2in
2
).
++:The parameter is measured with the JEDEC standard test boards (multi-layer PCB).
Electical Characteristics
Electrical Characteristics for Entire IC
The following specifications apply for V
DD
= 5V unless otherwise noted. Limits apply for T
A
= 25°C
Symbol
V
DD
I
DD
I
SD
V
IH
V
IL
Parameter
Supply Voltage
Quiescent Power Supply
Current
Shutdown Current
Headphone High Input Voltage
Headphone Low Input Voltage
Test Conditions
APA4863
Min.
3
Typ.
9
5
0.5
Max.
5.5
13.5
7.5
Unit
V
mA
µA
V
V
IN
=0V, I
O
=0A, HP-IN=0V
V
IN
=0V, I
O
=0A, HP-IN=4V
V
PIN1
= V
DD
5
4
0.8
V
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
3
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APA4863
Electical Characteristics Cont.
Electrical Characteristics for BTL Mode Operation
The following specifications apply for V
DD
= 5V unless otherwise noted. Limits apply for T
A
= 25°C
Symbol
V
OS
P
O
Parameter
Output Offset Voltage
Output Power
Test Conditions
V
IN
=0V
THD=1%, f=1kHz
R
L
=3
Ω
R
L
=4
Ω
R
L
=8
Ω
APA4863
Typ.
5
2.2
1.8
1.2
Unit
mV
W
THD+N
RSRR
X
TALK
SNR
THD=10%, f=1kHz
R
L
=3
Ω
R
L
=4
Ω
R
L
=8
Ω
Total Harmonic Distortion + Noise A
VD
=2, f=1kHz
R
L
=4
Ω
, P
O
=1.8W
R
L
=8
Ω
, P
O
=1W
Power Supply Rejection Ratio
V
DD
=5V, V
RIPPLE
=200Mv
Rms
, R
L
=8
Ω
C
B
=2.2
µ
F
Channel Separation
f=1kHz , C
B
=2.2
µ
F, P
O
=1W, R
L
=8
Ω
Signal-to-Noise Ratio
V
DD
=5V, P
O
=1.1W, R
L
=8
Ω
2.7
2.3
1.5
0.3
0.15
64
90
95
%
dB
dB
dB
Electrical Characteristics for SE Mode Operation
The following specifications apply for V
DD
= 5V unless otherwise noted. Limits apply for T
A
= 25°C
Symbol
V
OS
P
O
Parameter
Output Offset Voltage
Output Power
Test Conditions
V
IN
=0V
THD=0.5%, f=1kHz, R
L
=32Ω
THD=1%,
f=1kHz, R
L
=8Ω
THD=10%,
f=1kHz, R
L
=8Ω
THD+N Total Harmonic Distortion A
V
= -1 , P
O
=75mW, f=1kHz, R
L
=32Ω
plus Noise
RSRR Power Supply Rejection V
RIPPLE
=200mV
RMS
, f=1kHz, C
B
=2.2µF, R
L
=8Ω
Ratio
X
TALK
Channel Separation
f=1kHz , C
B
=2.2µF, P
O
=32mW, R
L
=32Ω
SNR Signal-to-Noise Ratio
V
DD
=5V , P
O
=340mW, R
L
=8Ω
APA4863
Typ.
5
90
320
400
0.02
49
85
95
Unit
mV
mW
%
dB
dB
dB
Truth Table for Logic Inputs
Shutdown
Low
Low
High
High
HP-IN
Low
High
Low
High
APA4863 Mode
Bridge -Tied
Single-Ended
APA4863 Shutdown
APA4863 Shutdown
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
4
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APA4863
Pin Description
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
HP-IN
GND
+ OUT B
V
DD
- OUT B
- IN B
BYPASS
+ IN B
SHUTDOWN
GND
+ OUT A
V
DD
- OUT A
- IN A
GND
+ IN A
NC
NC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
HP-IN
GND
+ OUT B
V
DD
- OUT B
- IN B
BYPASS
+ IN B
NC
NC
SHUTDOWN
GND
+ OUT A
V
DD
- OUT A
- IN A
GND
+ IN A
Top View
for SOP
Top View
for TSSOP
SHUTDOWN
GND
+ OUT A
V
DD
- OUT A
- IN A
GND
+ IN A
GND
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
HP-IN
GND
+ OUT B
V
DD
- OUT B
- IN B
BYPASS
+ IN B
GND
GND
Thermal
Pad
Top View
for TSSOP-P
Bottom View
for TSSOP -P
Pin Description
Name
GND
V
DD
+ INA
- INA
+ OUT A
- OUT A
+ IN B
- IN B
+ OUT B
- OUT B
BYPASS
HP-IN
SHUTDOWN
I/O
I
I
I
O
O
I
I
O
O
I
I
Description
Ground connection of circuitry
Supply voltage input
Non-inverting input of channel A, connected to bypass pin inside the IC
Input pin of channel A
A channel + output in BTL mode, high impedance in SE mode
A channel - output in BTL mode, + output in SE mode
Non-inverting input of channel B, connected to bypass pin inside the IC
Input pin of channel B
B channel + output in BTL mode, high impedance in SE mode
B channel - output in BTL mode, + output in SE mode
Connect to voltage divider for internal mid-supply bias
Headphone control pin input, hold high for single-ended mode operation
Shutdown mode control pin input, places entire IC in shutdown mode
when held high, I
DD
= 0.5µA
Copyright
ANPEC Electronics Corp.
Rev. A.3 - Apr., 2001
5
www.anpec.com.tw
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