UTC386
LINEAR INTEGRATED CIRCUIT
YOUW ANG ELECTRONICS CO.LTD
1
LOW VOLTAGE AUDIO POWER
AMPLIFIER
DESCRIPTION
The UTC386 is a power amplifier designed for use
in low voltage consumer applications. The gain is
internally set to 20 keep the external part count low,
but the additional of external resistor and capacitor
between pin 1 and pin 8 will increase the gain to any
value up to 200.
FEATURES
*Battery operation
*Minimum external parts
*Wide supply voltage range:4V~12V
*Low quiescent current drain(4mA)
*Voltage gains:20~200
*Ground referenced input
*Self -centering output quiescent voltage
*low distortion
DIP-8
BLOCK DIAGRAM
6
VCC
4
GND
2
-Input
7
Bypass
8
Gain
1
Gain
15k
3
+Input
15k
15k
1.35k
150
50k
50k
1
2
3
4
5
6
7
8
5
Output
Gain
VCC
Output
GND
+Input
-Input
Gain
Bypass
UTC386
ABSOLUTE MAXIMUM RATINGS
(Ta=25
C
)
Characteristic
Symbol
Value
Unit
Supply Voltage
Vcc
15
V
Power Dissipation
Pd
660
mW
Input voltage
Vi
-0.4~+0.4
V
Operating Temperature
Topr
-20 to 70
C
Storage Temperature
Tstg
-40 to 125
C
UTC386
LINEAR INTEGRATED CIRCUIT
YOUW ANG ELECTRONICS CO.LTD
2
ELECTRICAL CHARACTERISTICS
(Vcc=6V,f=1kHz,Ta=25
C, All voltage referenced to GND unless otherwise specified)
Characteristic
Symbol
Test Condition
Min
Typ.
Max
Unit
Quiescent circuit current
I
CCQ
Vi=0
4
8
mA
Vcc=6V,R
L
=8
,THD=10%
250
325
mW
Output Power
Po
Vcc=9V,R
L
=16
,THD=10%
500
mW
Pin1 and pin 8 open
24
26
28
dB
Voltage Gain
G
V
10
F from pin 1 and pin 8
43
46
49
dB
Pin1 and pin 8 open
300
kHz
Bandwidth
BW
10
F fron pin 1 and pin 8
60
kHz
Total harmonic distortion
THD
Vcc=6V,R
L
=8
,Po=125mW,
f=1kHz, pin1 and pin 8 open
0.2
%
Power supply Volatge Rejection
Ratio
SVR
Vcc=6V,f=1kHz, C
bypass
=10
F,
pin1 and pin 8 open
30
dB
Input Resistance
Ri
Pin2 and pin 3 open
50
k
Input Bias current
I
BIAS
Pin1 and pin 8 open
250
nA
TYPICAL APPLICATION CIRUIT
UTC386
2
6
1
8
4
7
5
3
Vs
Vin
250
F
0.05
F
10
10k
Fig. 1 G
V
=20dB
UTC386
2
6
1
8
4
7
5
3
10
F
250
F
0.05
F
10
10k
Vin
Vs
bypass
Fig. 2 G
V
=200
PDF 
ZIP