UNISONIC TECHNOLOGIES CO., LTD
LM4863
DUAL 2.2W AUDIO AMPLIFIER
PLUS STEREO HEADPHONE
FUNCTION
DESCRIPTION
CMOS IC
The UTC
LM4863
is a dual bridge-connected audio power
amplifier. It combines dual bridge speaker amplifiers and stereo
headphone amplifiers on one chip to simplify audio system design.
In addition, the headphone input pin allows the amplifiers to
operate in single-ended mode when driving stereo headphones.
The IC could deliver different power by packages as below (when
connected to a 5V supply with less than 1.0% THD+N.):
-
HTSSOP-20, 4Ω load: 2.2W
-
HTSSOP-20, 3Ω load: 2.5W(with forced-air cooled)
-
SOP/DIP
, 8Ω load: 1.1W.
The UTC
LM4863
features an externally controlled, low-power
consumption shutdown mode, a stereo headphone amplifier mode,
and thermal shutdown protection. It also utilizes circuitry to reduce
“clicks and pops” during device turn-on.
FEATURES
* “Click and pop” suppression circuitry
* Thermal shutdown protection circuitry
* Unity-gain stable
* Stereo headphone amplifier mode
ORDERING INFORMATION
Ordering Number
Lead Free
LM4863L-D16-T
-
-
Halogen Free
LM4863G-D16-T
LM4863G-S18-R
LM4863G-N20-R
Package
DIP-16
SOP-18
HTSSOP-20
Packing
Tube
Tape Reel
Tape Reel
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LM4863
MARKING
Packing
MARKING
CMOS IC
DIP-16
SOP-18
HTSSOP-20
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LM4863
PIN CONFIGURATION
DIP-16
SHUTDOWN
GND
+OUT A
V
DD
-OUT A
-IN A
GND
+IN A
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
GND
1
2
3
4
5
6
7
8
9
SOP-18
18
17
16
15
14
13
12
11
10
CMOS IC
HP-IN
GND
+OUT B
V
DD
-OUT B
-IN B
BYPASS
+IN B
GND
PIN DESCRIPTION
I/O
-
-
-
I
I
I
I
O
O
I
I
O
O
PIN DESCRIPTION
Supply voltage
Ground
Internal mid-supply bias reference bypassing
Entire IC into the shutdown mode when this pin connected
to the V
DD
Output mode select, connected to the V
DD
for SE mode or
GND for BTL mode
Non-inverting input of channel A, connected to BYPASS
pin inside the IC
Inverting input of channel A
Channel A + output in BTL mode, high impedance in SE
mode
Channel A - output in BTL mode, + output in SE mode
Non-inverting input of channel B, connected to BYPASS
pin inside the IC
Inverting input of channel B
Channel B + output in BTL mode, high impedance in SE
mode
Channel B - output in BTL mode, + output in SE mode
PIN NO.
PIN NAME
DIP-16 SOP-18
HTSSOP-20
4,13
4,15
4,17
V
DD
2,7,15 2,7,9,10,17 2,7,9,10,11,12,19
GND
10
12
14
BYPASS
1
16
8
6
3
5
9
11
14
12
1
18
8
6
3
5
11
13
16
14
1
20
8
6
3
5
13
15
18
16
SHUTDOWN
HP-IN
+INA
-INA
+OUTA
-OUTA
+INB
-INB
+OUTB
-OUTB
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LM4863
ABSOLUTE MAXIMUM RATINGS
PARAMETER
CMOS IC
SYMBOL
RATINGS
UNIT
Supply Voltage
V
DD
6.0
V
Recommended Supply Voltage Range
V
DD
2.0 ~ 5.5
V
Input Voltage
V
IN
-0.3 ~ V
DD
+0.3
V
Power Dissipation
P
D
Internally limited
Junction Temperature
T
J
+125
°С
Operating Temperature
T
OPR
-40 ~ +85
°С
Storage Temperature
T
STG
-65 ~ +150
°С
Note Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER
SYMBOL
SOP-18
DIP-16
HTSSOP-20
SOP-18
DIP-16
HTSSOP-20
θ
JA
RATINGS
90
63
90
2
20
2
UNIT
°С/W
°С/W
°С/W
°С/W
°С/W
°С/W
Thermal resistance (Junction to Ambient)
Thermal resistance (Junction to Case)
θ
JC
ELECTRICAL CHARACTERISTICS
(
Notes 1
)
(V
DD
=5V, T
A
=25°С, unless otherwise specified)
SYMBOL
V
DD
V
IH
V
IL
I
DD
I
SD
V
IN
=0V, I
OUT
=0A, HP-IN=0V
V
IN
=0V, I
OUT
=0A, HP-IN=4V
V
DD
applied to the SHUTDOWN pin
TEST CONDITIONS
MIM TYP MAX UNIT
2
4
6
2
11.5
5.8
0.7
5
2.5
2.2
3.2
2.7
1.1
1.5
0.34
0.3
%
R
L
=8Ω, P
OUT
=1W
0.3
67
90
98
dB
dB
dB
5.5
0.8
20
V
V
V
mA
μA
50
mV
W
PARAMETER
FOR ENTIRE IC
Supply Voltage
High
Headphone Input
Voltage
Low
Quiescent Power Supply Current
(Note 2)
Shutdown Current
FOR BRIDGED-MODE OPERATION
Output Offset Voltage
HTSSOP-20
V
O(OFF)
V
IN
=0V
THD=1%, f=1kHz
R
L
=3Ω
R
L
=4Ω
R
L
=3Ω
R
L
=4Ω
R
L
=8Ω
R
L
=8Ω
Output Power
(measured at the device
terminals)
P
OUT
DIP-16
SOP-18
HTSSOP-20
DIP-16
SOP-18
THD+N=10%, f=1kHz
THD=1%, f=1kHz
THD+N=10%, f=1kHz
THD+N=1%, f=1kHz, RL=32Ω
1.0
W
W
Total Harmonic
Distortion + Noise
20Hz≤f≤20kHz,
THD+N
A
VD
=2
PSRR
X
TALK
SNR
R
L
=4Ω, P
OUT
=2W
Power Supply Rejection Ratio
Channel Separation
Signal To Noise Ratio
V
DD
=5V, V
RIPPLE
=200mV
RMS
, R
L
=8Ω,
C
B
=1.0μF
f=1kHz, C
B
=1.0μF
V
DD
=5V, P
OUT
=1.1W, R
L
=8Ω
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LM4863
ELECTRICAL CHARACTERISTICS(Cont.)
SYMBOL
V
O(OFF)
TEST CONDITIONS
PARAMETER
FOR SINGLE-ENDED OPERATION
Output Offset Voltage
CMOS IC
MIM TYP MAX UNIT
V
IN
=0V
5
50
mV
75
85
THD=0.5%, f=1kHz, R
L
=32Ω
mW
Output Power
P
OUT
THD+N=1%, f=1kHz, R
L
=8Ω
340
THD+N=10%, f=1kHz, R
L
=8Ω
440
A
V
=-1, P
OUT
=75mW,20Hz≤f≤20kHz,
0.2
%
Total Harmonic Distortion + Noise
THD+N
R
L
=32Ω
Power Supply Rejection Ratio
PSRR C
B
=1.0μF, V
RIPPLE
=200mV
RMS,
f=1kHz
52
dB
Channel Separation
X
TALK
f=1kHz, C
B
=1.0μF
60
dB
Signal To Noise Ratio
SNR V
DD
=5V, P
OUT
=340mW, R
L
=8Ω
95
dB
Note:1
. All voltages are measured with respect to the ground (GND) pins, unless otherwise specified.
2. Depends on the offset voltage when a practical load is connected to the amplifier.
3. When driving 3Ω or 4Ω and operating on a 5V supply, the HTSSOP-20 package must be mounted to the
circuit board that has a minimum of 2.5 in
2
of exposed, uninterrupted copper area connected to the
exposed-DAP.
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