SPWLM386D [SECOS]
Low Voltage Audio Power Amplifier; 低电压音频功率放大器
| 型号： | SPWLM386D |
| 厂家： | 
SECOS HALBLEITERTECHNOLOGIE GMBH |
| 描述： | Low Voltage Audio Power Amplifier |
| 文件： | 总6页 (文件大小：996K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SPWLM386D
Low Voltage Audio Power
Elektronische Bauelemente
Amplifier
RoHS Compliant Product
DIP-8
Description
D
GAUGE PLANE
The SPWLM386D is a power amplifier, designed for use in low
voltage consumer applications. The gain is internally set to 20
to keep external part count low, but the addittion 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 input are ground
referenced while the output automatically biases to one-half the
supply voltage. The quiescent power drain is only 24 millwatts
when operating from a 6 voltage supply, marking the SPWLM386D
ideal for battery operation.
Features
SEATING PLANE
b
Z
Z
* Ground Referenced Input
SECTION Z - Z
*
Low Quiescent Current Drain: 4mA
e
b
* Wide Supply Voltage Range: 4V~12V
* Voltage Gains: 20~200
Millimeter
Millimeter
Ω
* Low Distortion: 0.2% ( Av=20, Vs=6V, RL=8
, Po=125mW, f=1 kHz)
REF.
REF.
Min.
-
Max.
0.5334
-
Min.
0.203
9.017
6.096
7.620
Max.
0.279
10.16
7.112
8.255
A
A1
A2
b
b1
b2
b3
c
c1
D
E
E1
e
HE
L
* Self-Centering Output Quiescent Voltage
* Battery Operation
0.381
2.921
0.356
0.356
1.143
0.762
0.203
4.953
0.559
0.508
1.778
1.143
0.356
* Minimum External Parts
2.540 BSC
-
10.92
3.810
2.921
Applications
* Line Drivers
*
Power Converters
* Small Servo Drivers
* Intercoms
* Ultrasonic Drivers
* AM-FM Radio Amplifiers
* Portable Tape Player Amplifiers
* TV sound Systems
Equivalent Schematic and Connection Diagram
http://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 1 of 6
SPWLM386D
Low Voltage Audio Power
Elektronische Bauelemente
Amplifier
Abs olute Maximum R atings (Note 2)
P arameter
S ymbol
Value
15
1.25
Unit
V
W
V
к
к
к
Supply Voltage
VCC
Pd
Vi
Topr
Tstg
Tj
Power Dissipation
Input Voltage
Operating Temperature
Storage Temperature
Junction Temperature
-0.4 ~ +0.4
0 ~ 70
-65 ~ 150
150
Electrical Characteristics (T
A
=25к Note1, 2)
Parameter
Operating Supply Voltage
Quiescent Current
Symbol
VS
Test Conditions
Min
4
-
Typ. Max. Unit
-
12
8
V
IQ
VS=6V, VIN=0
4
mA
VS=6V, RL=8ꢀ, THD=10%
VS=9V, RL=8ꢀ, THD=10%
230
480
-
-
-
-
Output Power
PO
mW
VS=6V, f=1kHz
26
46
300
Voltage Gain
GV
BW
-
-
-
-
-
-
dB
kHz
%
10ꢁF form Pin1 to Pin8
Bandwidth
VS=6V, Pin1 to Pin8 open
PO=125mW, VS=6V, f=1kHz
RL=8ꢀ, Pin1 to Pin8 open
Total Harmonic Distortion
THD
0.2
Power Supply Rejection
Ration
VS=6V, f=1kHz, CBYPASS=10ꢁF Pin1
and Pin8 open, Referred to output
PSRR
-
50
-
dB
Input Resistance
Input Bias Current
RIN
IBIAS
-
-
50
250
-
-
kꢀ
nA
VS=6V, Pin2 to Pin3 open
Note1: All voltages are measured with respect to the ground pin, unless otherwise specified.
Note2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions
for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC
electrical specifications under particular test conditions which guarantee specific performance limits. This assumes that the device
is within the Operating Ratings.
Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device
performance.
Note3: For operation in ambient temperatures above 25к, the device must be derated based on a 150к maximum junction temperature
and 1) a thermal resistance of 107к/W, junction to ambient for the dual-in-line package and 2)a thermal resistance of 170 к/W for
the small outline package.
Application Hints
Gina Control
To make the SPWLM386D a more versatile amplifier, two pins (1 and 8) are provided for gain control. With pins 1 and 8 open the 1.35Kꢀ
resistor sets the gain at 20 (26dB),If a capacitor is put from pin 1 to 8,bypassing the 1.35kꢀ 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) prom 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 15kꢀ resistor). For 6 dB effective bass boost: R=15kꢀ, the lowest value for
good stable operation in R=10kꢀ, if pin 8 is open, If pins 1 and 8 are bypassed then R as low as 2kꢀ can be used. This restriction is
because the amplifier is only compensated for closed-loop gains greater than 9.
Input Biasing
The schematic show that both input are biased to ground with a 50kꢀ 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 SPWLM386D is higher than 250kꢀit will contribute
very little additional offset (about 2.5mW at the input, 50mW at the output). If the dc source resistance is less than 10k, then shorting the
unused input to ground will keep the offset low (about 2.5mW at the input, 50mW at the output). For dc source resistance 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 SPWLM386D with higher gains (bypassing the 1.35kꢀresistor between pin1 and 8) it is necessary to bypass the unused
input, preventing degradation of gain and possible instabilities. This is done with a 0.1ꢁF capacitor or a short to ground depending on the
dc source resistance on the driven input.
http://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 2 of 6
SPWLM386D
Low Voltage Audio Power
Elektronische Bauelemente
Amplifier
Typical Performance Characteristics
Fig 1. Quiescent Supply Current
vs. Supply Voltage
Fig 2. Power Supply Rejection Ratio
(Referred to the output) vs. Frequency
Fig 3. Peak-to-Peak Voltage Swing
vs. Supply Voltage
Fig 4. Voltage Gain vs. Frequency
Fig 5. Distortion vs. Frequency
Fig 6. Distortion vs. Output Power
ht tp://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 3 of 6
SPWLM386D
Low Voltage Audio Power
Elektronische Bauelemente
Amplifier
Fig 7. Device Dissipation
Fig 8. Device Dissipation
vs. Output Power -4Ө Load
vs. Output Power -8Ө Load
Fig 9. Device Dissipation
Fig 10. Frequency Response with
Bass Boost
http://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 4 of 6
SPWLM386D
Low Voltage Audio Power
Elektronische Bauelemente
Amplifier
Typical Applications
Amplifier with Gain=20
Minimum Parts
Amplifier with Gain=200
Amplifier with Gain=50
Low Distortion Power Wienbridge Oscillator
Amplifier with Bass Boost
Square Ware Oscillator
http://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 5 of 6
SPWLM386D
Low Voltage Audio Power
Elektronische Bauelemente
Amplifier
AM Radio Power Amplifier
Note4: Twist supply lead and supply ground very tightly.
Note5: Twist speaker lead and ground very tightly.
Note6: Ferrite bead in Ferroxcube K5-001-001/3B with 3 turns of wire.
Note7: R1C1 band limits input signals.
Note8: All components must be spaced very closely to IC.
ht tp://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 6 of 6
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