LM386L-S08-R [UTC]
LOW VOLTAGE AUDIO POWER AMPLIFIER; 低电压音频功率放大器
| 型号： | LM386L-S08-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | LOW VOLTAGE AUDIO POWER AMPLIFIER |
| 文件： | 总7页 (文件大小：182K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO.,
LM386
LINEAR INTEGRATED CIRCUIT
LOW VOLTAGE AUDIO POWER
AMPLIFIER
SOP-8
ꢀ
DESCRIPTION
The UTC LM386 is a power amplifier, designed for use in low
TSSOP-8
voltage consumer applications. The gain is internally set to 20 to
keep external part count low, but the addition of an external
resistor and capacitor between pin 1 and pin 8 will increase the
gain to any value up from 20 to 200.
The inputs are ground referenced while the output
DIP-8
automatically biases to one-half the supply voltage.The quiescent
power drain is only 24 milliwatts when operating from a 6 voltage
supply, making the LM386 ideal for battery operation.
*Pb-free plating product number:LM386L
ꢀ
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:0.2%(Av =20,Vs=6V,RL=8Ω,Po=125mW,f=1kHz)
ꢀ
ORDERING INFORMATION
Order Number
Package
Packing
Normal
Lead Free Plating
LM386-S08-R
LM386-S08-T
LM386-P08-R
LM386-P08-T
LM386-D08-T
LM386L-S08-R
LM386L-S08-T
LM386L-P08-R
LM386L-P08-T
LM386L-D08-T
SOP-8
SOP-8
TSSOP-8
TSSOP-8
DIP-8
Tape Reel
Tube
Tape Reel
Tube
Tube
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co.,
1
QW-R107-007,F
LM386
LINEAR INTEGRATED CIRCUIT
ꢀ
PIN CONFIGURATION
Gain
8
Gain
1
2
3
4
-Input
+Input
7
6
5
Bypass
VCC
UTC LM386
GND
Output
ꢀ
BLOCK DIAGRAM
6
5
Vs
15K
7
BYPASS
15K
GAIN GAIN
8
1
15K
3
VOUT
150 1.35K
2
-INPUT
+INPUT
50K
50K
4
GND
UNISONIC TECHNOLOGIES CO., LTD
2
www.unisonic.com.tw
QW-R107-007. F
LM386
LINEAR INTEGRATED CIRCUIT
ꢀ
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VCC
RATINGS
15
UNIT
V
Supply Voltage
Input Voltage
VIN
-0.4V ~ +0.4V
1250
V
DIP-8
Power Dissipation
PD
mW
SOP-8
TSSOP-8
600
600
Operating Temperature
Junction Temperature
Storage Temperature
TOPR
TJ
0 ~ +70
+125
°C
°C
°C
TSTG
-40 ~ +150
Note:1. Absolute maximum ratings are stress ratings only and functional device operation is not implied. The device
could be damaged beyond Absolute maximum ratings.
2. The device is guaranteed to meet performance specifications within 0℃~70℃ operating temperature range
and assured by design from –20℃~85℃.
ꢀ
ELECTRICAL CHARACTERISTICS (Ta=25°C, unless otherwise specified.)
PARAMETER
SYMBOL
Vss
TEST CONDITIONS
MIN
4
TYP
MAX
12
UNIT
V
Operating Supply Voltage
Quiescent Current
IQ
Vss=6V, VIN=0
Vss=6V, RL=8Ω, THD=10%
Vss=9V, RL=8Ω, THD=10%
4
8
mA
mW
mW
dB
250
500
325
700
26
Output Power
POUT
Vss=6V, f=1kHz
10µF from pin 1 to pin 8
Vss=6V , Pin1 and pin 8 open
Voltage Gain
GV
BW
46
dB
Bandwidth
300
kHz
P
OUT=125mW, Vs=6V,f=1kHz
Total Harmonic Distortion
THD
0.2
%
RL=8Ω pin1 and pin 8 open
Vss=6V, f=1kHz, CBYPASS=10µF
pin1and pin 8 open, Referred to
output
Rejection Ratio
RR
50
dB
Input Resistance
Input Bias Current
RIN
50
kΩ
nA
IBIAS
Vss=6V Pin2 and pin 3 open
250
UNISONIC TECHNOLOGIES CO., LTD
3
www.unisonic.com.tw
QW-R107-007. F
LM386
LINEAR INTEGRATED CIRCUIT
ꢀ
APPLICATION NOTES
GAIN CONTROL
To make the LM386 a more versatile amplifier, two pins(1and 8) are provided for gain control. With pins 1 and 8
open the 1.35 kΩ resistor sets the gain at 20(26dB),If a capacitor is put from pin 1 to 8,bypassing the 1.35 kΩ
resistor, the gain will go up to 200(46dB).If a resistor is placed in series with the capacitor, the gain can be set to any
value from 20 to 200.Gain control can also be done by capacitively coupling a resistor (or FET) from pin 1 to ground.
Additional external components can be placed in parallel with the internal feedback resistors to tailor the gain and
frequency response for individual applications. For example we can compensate poor speaker bass response by
frequency shaping the feedback path. This is done with a series RC from pin 1 to 5 (paralleling the internal 15 kΩ
resistor). For 6 dB effective bass boost: R=15 kΩ, the lowest value for good stable operation is R=10 kΩ, if pin 8 is
open, If pins 1 and 8 are bypassed then R as low as 2 kΩ can be used. This restriction is because the amplifier is
only compensated for closed-loop gains greater than 9.
INPUT BIASING
The schematic shows that both inputs are biased to ground with a 50 kΩ resistor. The base current of the input
transistors is about 250nA, so the inputs are at about 12.5mW when left open. If the dc source resistance driving the
LM386 is higher than 250 kΩ it will contribute very little additional offset (about 2.5mW at the input, 50mW at the
output).If the dc source resistance is less than 10 kΩ,then shorting the unused input to ground will keep the offset
low (about 2.5mV at the input,50 mV at the output).For dc source resistances between these values we can
eliminate excess offset by putting a resistor from the unused input to ground, equal in value to the dc source
resistance. Of course all offset problems are eliminated if the input is capacitively coupled.
When using the LM386 with higher gains (bypassing the 1.35 kΩ resistor between pins 1 and 8)it is necessary to
bypass the unused input, preventing degradation of gain and possible instabilities. This is done with a 0.1µF
capacitor or a short to ground depending on the dc source resistance on the driven input.
ꢀ
TYPICAL APPLICATIONS CIRCUIT
Amplifier with Gain=20
Minimum Parts
Amplifier with Gain=200
10µF
Vs
Vs
+
6
2
6
2
3
-
-
1
1
250µF
250µF
+
8
+
8
5
5
VIN
7
VIN
7
3
0.05µF
10
0.05µF
+
+
10K
4
10K
4
BYPASS
10
Amplifier with Gain=50
Low Distortion Power Wienbridge Oscillator
390
Vs
-
1.2K
10µF
10µF
6
4
Vs
+
2
3
1
250µF
6
8
5
2
3
+
-
1
50µF
+
V
IN
7
8
5
10
ELDEMA
CF-S-2158
Vo
+
10K
4
R
L
BYPASS
0.01µF
0.05µF
0.05µF
+
7
3V-15mA
BYPASS
47K
f=1kHz
10
0.01µF
4.7K
UNISONIC TECHNOLOGIES CO., LTD
4
www.unisonic.com.tw
QW-R107-007. F
LM386
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL APPLICATIONS CIRCUIT(cont.)
Amplifier with Bass Boost
Square Ware Oscillator
Vs
Vs
BYPASS
6
30K
6
2
2
-
-
7
1
4
50µF
250µF
8
0.1µF
+
+
VO
VO
5
0.033µF
5
1
8
3
3
+
R
L
+
RL
10K
4
0.05µF
10K
10K
10Ω
1K
f=1kHz
AM Radio Power Amplifier
Vs
10µ F
Cc
R1 0.05µ F
10K
+
FROM
DETECTOR
6
2
FERRITE
BEAD
VOL
10K
-
1
C1
2200pF
250µ F
+
8
5
7
+
8Ω
SPEAKER
3
47
+
4
+
10µ F
0.05µ F
Note 1: Twist Supply lead and supply ground very tightly.
Note 2: Twist speaker lead and ground very tightly.
Note 3: Ferrite bead in Ferroxcube K5-001-001/3B with 3 turns of wire.
Note 4: R1C1 band limits input signals.
Note 5: All components must be spaced very closely to IC.
UNISONIC TECHNOLOGIES CO., LTD
5
www.unisonic.com.tw
QW-R107-007. F
LM386
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL CHARACTERISTICS
Power Supply Rejection Ratio(Referred
to the Output) vs Frequency
Quiescent Supply Current vs Supply Voltage
60
50
40
6
C7=50µF
5
4
3
V
s
=6V
Av=26dB
1µF
30
20
0.5µF
10µF
2
1
NO BYPASSCAPACITOR
10
0
10
100
1K
10K
100K
4
5
6
7
8
9
10 11 12
Frequency(Hz)
Supply Voltage(volts)
Frequency Response With Bass Boost
Peak-to -Peak Output Voltage Swing vs Supply Voltage
10
27
26
RL=∞
16
25
24
8
6
4
8
23
22
21
4
20
19
2
0
18
17
20 50 100 200 500 1K 2K 5K10K20K
4
5
6
7
8
9
10 11 12
Supply Voltage(volts)
Frequency(Hz)
Voltage Gain vs Frequency
Distortion vs Frequency
60
50
40
2.0
Vs=6V
=8Ω
OUT=125mW
Av=26dB(C1.8=0)
1.8
1.6
RL
C
1.8=10µF
P
1.4
1.2
1.0
0.8
C
1.8=0
30
20
0.6
0.4
10
0
0.2
0
100
1K
10K
100K
1M
20 50 100 200 500 1K 2K 5K10K20K
Frequency (Hz)
Frequency (Hz)
UNISONIC TECHNOLOGIES CO., LTD
6
www.unisonic.com.tw
QW-R107-007. F
LM386
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL CHARACTERISTICS(cont.)
Device Dissipaton vs Output Power -
Distortion vs Output Power
4ΩLoad
10
2.0
Vs=6V
=8Ω
f=1kHz
1.8
1.6
9
8
R
L
7
6
1.4
1.2
1.0
0.8
Vs=12V
Vs=9V
3% THD
LEVEL
5
4
0.6
0.4
3
2
10%
THD
0.2
0
1
Vs=6V
LEVEL
0
0
0.1
0.2
0.3
0.4
0.5
0.001
0.01
0.1
1.0
Power Output (Watts)
Output Power (W)
Device Dissipaton vs Output Power -
Device Dissipaton vs Output Power -16ΩLoad
1.0
8ΩLoad
2.0
1.8
3% THD
LEVEL
10%
THD
LEVEL
Vs=16V
1.6
1.4
0.8
Vs=16V
1.2
1.0
0.8
0.6
0.4
Vs=12V
Vs=12V
Vs=9V
10%
THD
LEVEL
0.6
0.4
0.2
0
Vs=9V
Vs=6V
3% THD
LEVEL
0.2
0
Vs=6V
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Output Power (W)
0 0.2 0.4 0.6 0.8 1.0
1.2 1.4 1.6 1.8 2.0
Output Power (W)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
7
www.unisonic.com.tw
QW-R107-007. F
相关型号：
LM386MMX-1
IC 0.325 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8, 0.118 INCH, MSOP-8, Audio/Video Amplifier
NSC
©2020 ICPDF网 联系我们和版权申明