BL4863

BL4863
Dual 2.2W Audio Amplifier Plus Stereo Headphone Function
Features












Stereo headphone amplifier mode
Unity-gain stable
Power output at 5.0V, 1% THD+N, 3Ω
2.50 W (typ.)
Power output at 5.0V, 1% THD+N, 4Ω
2.20 W (typ.)
Power output at 5.0V, 1% THD+N, 8Ω
1.25 W (typ.)
Single-ended mode TND+N at 75mW into 32 Ω load 0.5% (max)
Ultra-low shutdown current
0.1 uA (typ.)
2.0V – 5.5V power operation range
Improved circuitry eliminates pop-click noise during turn-on and turn-off transitions
Thermal shutdown protection circuitry
External gain configuration capability
Exposed-DAP TSSOP20 package , DIP16 package SOP16 package
General Description
The BL4863 is a dual BTL connected Class-AB audio power amplifier designed for multimedia
monitors and other portable applications. It is capable of delivering 2.5 watts of continuous
average power to a 3Ω BTL load or 2.2 watts to a 4Ω BTL load with less than 1% distortion
(THD+N) from a 5VDC power supply. In addition, the HP-IN input pin allows the BL4863 to
operate in single-ended mode and drive stereo headphones.
The BL4863 was designed specifically to provide high quality output power with a minimal
amount of external components. With dual bridge speaker amplifiers and stereo headphone
amplifiers on one chip, it simplifies audio system design.
The BL4863 features an externally controlled shutdown mode, a stereo headphone driver mode,
and thermal shutdown protection. With special pop-click eliminating circuit, the BL4863
provides perfect pop-click characteristic during turn-on and turn-off transitions.
The BL4863 is unity-gain stable and can be configured by external gain-setting resistors.
Applications



Multimedia monitors
Portable and desktop computers
Portable televisions
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Total 11 Pages
BL4863
Pin Diagrams
SHUTDOWN
GND
+OUTA
VDD
-OUTA
-INA
GND
+INA
GND
GND
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
HP-IN
GND
+OUTB
VDD
-OUTB
-INB
BYPASS
+INB
GND
GND
Exposed-DAP TSSOP20
DIP16/SOP16
Pin Description
No.
Pin Name
I/O
Description
1
SHD
I
Shout-down Logical Control, ‘1’ is active.
2,7,10,11,19
GND
I/O
Ground
3
+OUTA
O
Positive Output (Channel A)
4,17
VDD1
I/O
Power
5
-OUTA
O
Negative Output (Channel A)
6
-INA
I
Negative Signal Input (Channel A)
8
+INA
I
Positive Signal Input (Channel A)
9,12
NC
/
Not Connected
13
+INB
I
Positive Signal Input (Channel B)
14
BP
I/O
Internal DC reference, Connected with Bypass
Capacitor.
15
-INB
I
Negative Signal Input (Channel B)
16
-OUTB
O
Negative Output (Channel B)
18
+OUTB
O
Positive Output (Channel B)
20
HP-IN
I
HP-IN Function Control, ‘1’ is active.
Order Information
Part Number
Package
Shipping
BL4863TS
TSSOP20
4000 pcs / Tape & Reel
BL4863PD
DIP16
Tube
BL4863SO
SOP16
Tube
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Total 11 Pages
BL4863
Typical Application Circuit
VDD
Rf=20KΩ
Cs=1uF
PIN 4 17
-INA
CO=100uF
Ri=20KΩ
-OUTA
Amp 1A
50KΩ
RL=8Ω
20KΩ
20KΩ
Amp 2A
+INA
1KΩ
Ci=1uF
20KΩ
Audio
input
HEADPHONE JACK
+OUTA
To HP_IN Circuit
CB=0.33uF
BP
+INB
Ci=1uF
RL=8Ω
20KΩ
-OUTB
Amp 1B
-INB
CO=100uF
1KΩ
Ri=20KΩ
VDD
100KΩ
+OUTB
20KΩ
Audio
input
20KΩ
50KΩ
Amp 2B
SHD
HP_IN
HP-DET
To Control Pin on
100KΩ
Headphone Jack
PIN 2 7 10 11 19
GND
Rf=20KΩ
** SHD and HP-IN Operation Logic Level truth table
SHD
HP-IN
OPERATION MODE
Low
Low
Bridged amplifiers
Low
High
Single-Ended amplifiers
High
Low
Shutdown
High
High
Shutdown
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Total 11 Pages
BL4863
Absolute Maximum Ratings
Operating Ratings
Supply Voltage
-0.3V to 6V
Input Voltage
-0.3V to VDD+0.3V
ESD Susceptibility (Human body model)
2000V
Junction Temperature
-40℃ to +150℃
Storage Temperature
-65℃ to +150℃
Thermal Resistance
θJC(TSSOP20)
41℃/W
Temperature Range
Supply Voltage
-40℃≦TA≦85℃
2.0V≦VDD≦5.5V
NOTE: Absolute Maximum Ratings indicate limits
beond which damage to the device may occur.
Operating Rating indicate conditions for which the
device is functional, but do not guarantee specific
performance limits.
Electrical Characteristics for Entire IC (VDD = 5V, TA = 25℃)
Symbol
VDD
IDD
ISD
Parameter
Conditions
Spec
Min.
Typ.
2.0
Power Supply Voltage
Max.
Units
5.5
V
Quiescent Power Supply
VIN = 0V, HP-IN = 0V, No Load
4.0
15
mA
Current
VIN = 0V, HP-IN = 5V, No Load
3.0
6
mA
Shutdown Current
VSHD = VDD
0.1
2
uA
VHPIH
Headphone Voltage Input High
VHPIL
Headphone Voltage Input Low
4.0
V
0.8
V
Electrical Characteristics for Bridge-Mode Operation (VDD = 5V, TA = 25℃)
Symbol
VOS
Parameter
Output Offset Voltage
Conditions
VIN = 0V
THD+N<=1%,
PO
Output Power
THD+N<=10%,
f=1KHz
THD+N
PSRR
Min.
Typ.
Max.
-50
5
50
3Ω Load
2.5
4Ω Load
2.2
8Ω Load
f=1KHz
Spec
1.0
Units
mV
1.25
32Ω Load
0.34
3Ω Load
3.2
4Ω Load
2.7
8Ω Load
1.5
W
Total Harmonic
20Hz≤f≤20kHz, PO = 2W, RL = 4Ω
0.3
Distortion + Noise
AVD = 2
PO = 1W, RL = 8Ω
0.3
VDDRIPPLE=0.2VRMS , f=1KHz, CB=1μ F
73
dB
Power Supply Rejection
Ratio
%
XTALK
Channel Separation
f=1KHz, CB=1μ F
90
dB
SNR
Signal to Noise Ratio
PO = 1.1W, RL = 8Ω
98
dB
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-4-
Total 11 Pages
BL4863
Electrical Characteristics for Single-Ended Operation (VDD = 5V, TA = 25℃)
Symbol
VOS
PO
THD+N
PSRR
Parameter
Output Offset Voltage
Output Power
Conditions
Min.
Typ.
Max.
VIN = 0V
-50
5
50
THD+N<=0.5%, f=1KHz, 32Ω Load
75
92
THD+N<=1%, f=1KHz, 8Ω Load
350
THD+N<=10%, f=1KHz, 8ΩLoad
450
Total Harmonic
20Hz≤f≤20kHz, AVD = -1,
Distortion + Noise
PO = 75mW, RL =32Ω
Power Supply Rejection
Ratio
Spec
Units
mV
mW
0.1
%
VDDRIPPLE=0.2VRMS , f=1KHz, CB=1μ F
70
dB
XTALK
Channel Separation
f=1KHz, CB=1μ F
80
dB
SNR
Signal to Noise Ratio
PO =340mW, RL = 8Ω
97
dB
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-5-
Total 11 Pages
BL4863
Typical Performance Characteristics
10
BL4863 THD+N vs Outpt
(VDD=5V, RL=8O, BTL
Power
Mode)
10
BL4863 THD+N vs
(VDD=5V,
RL=8O, Po=1W, BTL
Frequency
Mode)
20
KHz
1
KHz
20 Hz
1
1
TH
D+
N
(%
)
T
H
D+
N
(%
)
0.1
0.1
0.01
10m
10
0.01
0.1
OUTPUT POWER
(W)
1
2
BL4863 THD+N vs Outpt
(VDD=5V, RL=4O, BTL
Power
Mode)
10
100
1k
FREQUENCY
(Hz)
10k
20k
10k
20k
10k
20k
BL4863 THD+N vs
(VDD=5V,
RL=4O, Po=2W, BTL
Frequency
Mode)
20
KHz
1
KHz
20 Hz
1
1
TH
D+
N
(%
)
TH
D+
N
(%
)
0.1
0.01
10m
10
0.1
0.1
OUTPUT POWER
(W)
1
0.01
3
BL4863 THD+N vs Outpt
(VDD=5V, RL=3O, BTL
Power
Mode)
10
100
1k
FREQUENCY
(Hz)
BL4863 THD+N vs
(VDD=5V,
RL=3O, Po=2.2W, BTL
Frequency
Mode)
20
KHz
1
KHz
20 Hz
1
1
TH
D+
N
(%
)
TH
D+
N
(%
)
0.1
0.01
10m
0.1
0.1
OUTPUT POWER
(W)
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1
0.01
5
-6-
100
1k
FREQUENCY
(Hz)
Total 11 Pages
BL4863
10
BL4863 THD+N vs Outpt
(VDD=5V, RL=32O, SE
Power
Mode)
10
BL4863 THD+N vs
(VDD=5V,
RL=32O, Po=75mW, SE
Frequency
Mode)
20
KHz
1
KHz
20 Hz
1
1
TH
D+
N
(%
)
TH
D+
N
(%
)
0.1
0.1
0.01
10m
0.1
0.01
0.2
100
OUTPUT POWER
(W)
10
BL4863 THD+N vs Outpt
(VDD=3.3V,
RL=8O, BTL
Power
Mode)
10
1k
FREQUENCY
(Hz)
10k
20k
BL4863 THD+N vs
(VDD=3.3V,
RL=8O, Po=450mW, BTL
Frequency
Mode)
20
KHz
1
KHz
20 Hz
1
1
TH
D+
N
(%
)
TH
D+
N
(%
)
0.1
0.01
10m
10
0.1
0.1
OUTPUT POWER
(W)
0.01
1
BL4863 THD+N vs Outpt
(VDD=3.3V,
RL=4O, BTL
Power
Mode)
10
100
1k
FREQUENCY
(Hz)
10k
20k
BL4863 THD+N vs
(VDD=3.3V,
RL=4O, Po=750mW, BTL
Frequency
Mode)
20
KHz
1
KHz
20 Hz
1
1
TH
D+
N
(%
)
TH
D+
N
(%
)
0.1
0.01
10m
0.1
0.1
OUTPUT POWER
(W)
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1
0.01
2
-7-
100
1k
FREQUENCY
(Hz)
10k
20k
Total 11 Pages
BL4863
0
BL4863 Channel
(VDD=5V,
RL=8O, Po=1W, CB=1uF, BTL
Separation
Mode)
Channel B to Channel
BL4863 Channel
(VDD=5V,Separation
RL=3O, Po=75mW, CB=1uF, SE
0Mode)
Channel A to Channel
A
Channel A to Channel
B
B
Channel B to Channel
A
-20
-20
-40
-40
Ou
tp
ut
Le -60
vel
(d
B)
Ou
tp
ut
Le -60
vel
(d
B)
-80
-80
-100
-100
-120
20
100
1k
FREQUENCY
(Hz)
10k
-120
20
20k
Power Supply Rejection Ratio
(VDD=5V, RL=8Ω, Vripple=200mVp-p, CB=1uF)
-10
1m
SE Mode
BTL Mode
100
1k
FREQUENCY
(Hz)
10k
20k
BL4863 Noise
(VDD=5V, RL=8O,
Floor A-Weighted Filte, BTL
Mode)
Vo1+Vo
2
Vo1
-20
PSRR (dB)
-30
100µ
Ou
tp
ut
No
ise
Vo
lta
ge
(µ
V) 10µ
-40
-50
-60
-70
-80
20
8
100
1k
FREQUENCY (Hz)
10k
1µ
20
20k
100
1k
FREQUENCY
(Hz)
10k
20k
BL4863 Supply Current vs Supply
Voltage
7
6
5
SU
PP
LY4
C
U
R 3
RE
NT
(m2
A)
1
0
2
2.5
3
3.5
4
SUPPLY
VOLTAGE (V)
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4.5
5
5.5
-8-
Total 11 Pages
BL4863
Package Information
20 – 引脚模式的 TSSOP 封装
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-9-
Total 11 Pages
BL4863
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- 10 -
Total 11 Pages
BL4863
16 - 引脚模式的 SOP 封装
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- 11 -
Total 11 Pages