Sunday, October 25, 2009
The LM3875 is a high-performance audio power amplifier capable of delivering 56W of continuous average power to an 8 load. The performance of the LM3875, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe™) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, caused by shorts to the supplies, thermal runaway, and instantaneous temperature peaks.
This amplifier circuit is based on the standard non-inverted GainClone configuration. I did some calucaltions on the feedback resistor and other components in order to check the gain etc. Please find some more background on the calculations relevant for GainClones on the background section
Parameters IC LM3875
Output Current 6000 mA.
Offset Voltage max, 25C 10 mV.
Gain Bandwidth 8 MHz.
Supply Min 20 Volt.
Supply Max 84 Volt.
Supply Current Per Channel 30 mA.
PowerWise Rating 2 3750 uA/MHz.
Slew Rate 11 Volts/usec.
Input OutputType Not Rail to Rail.
Max Input Bias Current 1000 nA.
Special Features AvCl>10.
Function Op Amp.
Channels 1 Channels.
Temperature Min 0 deg C.
Temperature Max 70 deg C.
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Parameters IC LM3875Output Current 6000 mA.
Offset Voltage max, 25C 10 mV.
Gain Bandwidth 8 MHz.
Supply Min 20 Volt.
Supply Max 84 Volt.
Supply Current Per Channel 30 mA.
PowerWise Rating 2 3750 uA/MHz.
Slew Rate 11 Volts/usec.
Input OutputType Not Rail to Rail.
Max Input Bias Current 1000 nA.
Special Features AvCl>10.
Function Op Amp.
Channels 1 Channels.
Temperature Min 0 deg C.
Temperature Max 70 deg C.
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This audio power amplifier project is based on IC LM1875 . It is able to deliver up to 30W of power using an 8 ohm load and dual 30V DC power supplies. It is designed to operate with minimum external components with current limit and thermal shutdown protection features . Other features include high gain, fast slew rate, wide power supply range, large output voltage swing and high current capability.
The LM1875 has a smaller package than the TO-220 package used for the LM3875. As a result, the feedback resistor can not be connected the same way I did for the LM3875. On the positive side: The package does not contain many unused pins.
The LM1875 has a smaller package than the TO-220 package used for the LM3875. As a result, the feedback resistor can not be connected the same way I did for the LM3875. On the positive side: The package does not contain many unused pins.
Skema rangkaian 20 watt mono amplifier
The following components will be used:
- LM1875 Power OpAmp
- 4 capacitors BC 1000uF/50V
IC LM1875 description
The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications.
The LM1875 delivers 20 watts into a 4 /8 ohm load on ±25V supplies. Using an 8 ohm load and ±30V supplies, over 30 watts of power may be delivered. The amplifier is designed to operate with a minimum of external components. Device overload protection consists of both internal current limit and thermal shutdown.
The LM1875 design takes advantage of advanced circuit techniques and processing to achieve extremely low distortion levels even at high output power levels. Other outstanding features include high gain, fast slew rate and a wide power bandwidth, large output voltage swing, high current capability, and a very wide supply range. The amplifier is internally compensated and stable for gains of 10 or greater.
Features IC LM1875
• Up to 30 watts output power.
• AVO typically 90 dB.
• Low distortion: 0.015%, 1 kHz, 20 W.
• Wide power bandwidth: 70 kHz.
• Protection for AC and DC short circuits to ground.
• Thermal protection with parole circuit.
• High current capability: 4A.
• Wide supply range 16V-60V.
• Internal output protection diodes.
• 94 dB ripple rejection.
• Plastic power package TO-220.
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Thursday, October 22, 2009
There is Amplifier circuit based on STK400xx series. The amplifier circuit will give you good quality of sound unexpensive too since STK40xx series have low price. It is easy we make a power amplifier using only few external components. The STKxxxx amplifiers, for them we will find in enough eponymous stereo amplifiers , but also in enough activety loudspeakers.
Component list
R1-4................................. 1Kohm
R2.................................... 33Kohm
R3-8................................. 100ohm
R5.................................... 0.22ohm 5W
R6.................................... 10ohm 2W
R7.................................... 6,8ohm 2W
R9....................................12Kohm
R10..................................10Kohm
R11.................................. 680ohm
C1.................................... 560 pF 100V ceramic or mylar
C2-7................................. 1 uF 63V MKT
C3-12............................... 220 uF 63V
C4-5-10............................ 100 pF
C6-9................................ 47uF 63V
C8................................... 100 nF 100V MKT
C11................................. 1 nF 100V MKT
C13................................. 100 uF 25V
C14................................. 10pF 100V ceramic or mylar
L1................................... 3μH [15 turns of 1mm around R6] 100V ceramic or mylar
F1-2................................ 2A Fuse fast
IC1=STK4036.................. STK4044
STK40xx Series:
STK 4036 > Supply: ±35V - ±53,5V; Power (8R load): 50W.
STK 4038 > Supply: ±40V - ±58V; Power (8R load): 60W.
STK 4040 > Supply: ±43V - ±63V; Power (8R load): 70W.
STK 4042 > Supply: ±46V - ±67V; Power (8R load): 80W.
STK 4044 > Supply: ±51V - ±74V ; Power (8R load): 100V.
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Wednesday, October 21, 2009
There is a circuit uses a high quality audio amplifier IC TDA2050. The power amplifier can provide 32 watt rms into 4ohm load and 25 watt rms into 8ohm. The circuit features low harmonic and crossover distortion and a low external component count.
Voltage gain is 27dB as shown, but this can be changed by using a different value resistor for the feedback path (R4, currently 22k, between pins 2 and 4). The amplifier must not be operated at any gain less than 10 (20dB) as set by R4 and R5, as it will oscillate. In some cases, an inductor may be needed in series with the output to prevent instability with capacitive loads (10 turns of 0.5mm wire wound around a 10 Ohm 1W resistor). The most common capacitive load is the speaker cable itself, and 'audiophile' leads are often worse than standard grade cables in this respect.
The 1 Ohm resistor (R6) should be a 1W or 0.5W type, and all others should be 1/4W 1% metal film (as I always recommend). All electrolytic capacitors should be rated at 50V if at all possible, and the 100nF (0.1uF) caps for the supplies should be as close as possible to the IC to prevent oscillation. C1 should be a bipolar (non-polarised) electrolytic, or may be plastic film if you prefer.
The supply voltage should be about ±25 Volts at full load, which will let this little guy provide a maximum of 25 Watts (rated minimum output at 25°C). To enable maximum power, it is important to get the lowest possible case to heatsink thermal resistance. This will be achieved by mounting with no insulating mica washer, but be warned that the heatsink will be at the -ve supply voltage and will have to be insulated from the chassis.
Layout PCB Amplifier TDA2050
Parameter IC TDA 2050
Supply Voltage........................................... ±25 V.
Input Voltage............................................... VS.
Differential Input Voltage............................. ±15 V.
Output Peak Current (internally limited)........ 5 A.
Power Dissipation TCASE = 75°C.................. 25 W.
Storage and Junction Temperature............. -40 to 150 °C.
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Sunday, October 18, 2009
Here is a 22watt Audio amplifier circuit uses IC TDA2040. TDA2040 is a monolithic power amplifier IC intended for use as a high quality, class AB audio power amplifier. The TDA2040 is designed to operate from a split power supply and no electrical isolation is needed between the mounting tab and its heatsink. It provides a high output current and has very low harmonic and crossover distortion.
Note:
Use ± 20V DC for powering the circuit.The IC must be heatsinked.
Uses 4 Ohm Speaker
For optimum performance input and output must be separately grounded.
PCB layout amplifier TDA2040Parameters IC TDA1514A IC TDA 2040
Supply Voltage........................................ ± 20 V.
Input Voltage........................................... ± 20 V.
Differential Input Voltage......................... ± 15 V.
Output Peak Current (internally limited).... 4 A.
Power Dissipation at Tcase = 75 °C........... 25 W.
Storage and Junction Temperature......... – 40 to + 150 °C.
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Friday, October 16, 2009
This is 48 Watt Amplifier by IC TDA1514A. the IC TDA1514A supports mute and stand-by modes. I’ve never built this one, so I’ve got no suggestions concerning practical construction.
Note:
Use -25 V+25 V DC for powering the circuit.
The IC must be heatsinked.
For optimum performance input and output must be separately grounded.
The IC must be heatsinked.
For optimum performance input and output must be separately grounded.
The IC TDA1514A integrated circuit is a hi-fi power amplifier for use as a building block in radio, tv and other audio applications. The high performance of the IC meets the requirements of digital sources. The circuit is totally protected, the two output transistors both having thermal and SOAR protection. The circuit also has a mute function that can be arranged for a period after power-on with a delay time fixed by external components.
Parameters IC TDA1514A
Supply voltage range......................................Min ± 10 V, Max ±30 V.
Output power, VP = ± 23 V, RL = 4 Ohm..........48 Watt.
Closed loop voltage gain................................30DB.
Input resistance............................................20 KOhm.
Output current (repetitive peak)......................Max 8 A.
Storage temperature range............................-55 to + 150 °C.
Mute voltage................................................7.25 V.
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Here is High-Performance 56 Watt Audio Power Amplifier with Mute Circuit used IC LM3876. an output mute function which can be used to eliminate switch-on and switch-off "thumps" to the loudspeaker load. the circuit capable of delivering 56 Watt into 8ohm load. The output stage is protected against short circuit to ground or either supply rail. Protection against transients from inductive loads is also provided at the output stage via internal clamp diodes.
The IC LM3876 also contains thermal shut-down protection which comes into operation if the chip temperature exceeds its safe operating range, and under-voltage shut-down in the event it to operate properly. When S1 is closed switch-on / switch-off muting is enabled. Applications include self-powered speakers, surround-sound amplifiers and compact stereo systems.
Parameters IC LM3876
Power@ 4Ohms, 1% THD...................60 Watt.
Power@ 8Ohms, 1% THD..................45 Watt.
Power@ 8Ohms, 10% THD................56 Watt.
THD Conditions.................................Po=40W @ Vs=±35V.
User Supply........................................35 Volt.
Supply Range.....................................+24 - +84V.
Temperature Min...............................-20 deg C.
Temperature Max..............................85 deg C.
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Here is a circuit Bridge 19 watt amplifier using IC LA4440 from Sanyo.It uses very less components other than the IC LA4440.A very high quality circuit with respect to its cost.
Component List
U1...................IC LA4440
R1...................2K2
RV1.................Potensiometer
C1...................100nF
C2, C3............47uF
C4..................2u2
C5..................100uF 25V
C6..................2200uF 25V
C7, C8...........47uF 25V
SP1................4ohm 25W
the IC LA 4440 is wired as a bridge amplifier to deliver a 19 W Rms on a 4 Ohm speaker. The IC has built in thermal, over voltage and short circuit protection.The IC also incorporates a audio muting function,but that is not used here.
Note:
Use a 12 V DC/ 3 Ampere current power supply .
Don’t forget to fit a proper heat sink with IC.
Use a 4 Ohm speaker as.
Layout PCB Stereo 19 Watt Bridge Amplifier
IC Power LA4440
Data IC LA4440
Maximum supply voltage.............................18 V.
Allowable power dissipation Pd max............15 W.
Operating temperature Topr........................–20 to +75.
Storage temperature Tstg............................–40 to +150.
Voltage gain VG..........................................49.5 to 53.5.
Output power PO....................................... Stereo 06 W, Bridge 19 W.
Input resistance ri ............................. ....... 30kOhm.
Wednesday, October 14, 2009
This is 80Watt power amplifier OCL circuit using devices pillar is the integrated circuit LM12. This interesting routes many good bass and treble alive. If a friend is the CD therefore has a beautiful voice and Pre Tone Control is good that some will take something very magical.
Importantly should choose Power supply source, which has been fairly high voltage class 38Vdc GND 38V-3A is the current low level. To decorate the fines resulting from the size finely R4 2 ohm/4W Idle current about 30mA, or with the whole center just before. Almost forgotten friends should choose the material is good, good, especially IC LM12 and Transistor everyone.
Skema rangkaian 80 watt Amplifier LM12
The LM12 is a power op amp capable of driving ±25V at ±10A while operating from ±30V supplies. The monolithic IC can deliver 80W of sine wave power into a 4Ω load with 0.01% distortion. Power bandwidth is 60 kHz. Further, a peak dissipation capability of 800W allows it to handle reactive loads such as transducers, actuators or small motors without derating. Important features include:
- input protection
- controlled turn on
- thermal limiting
- overvoltage shutdown
- output-current limiting
- dynamic safe-area protection
The IC delivers ±10A output current at any output voltage yet is completely protected against overloads, including shorts to the supplies. The dynamic safe-area protection is provided by instantaneous peak-temperature limiting within the power transistor array.
The turn-on characteristics are controlled by keeping the output open-circuited until the total supply voltage reaches 14V. The output is also opened as the case temperature exceeds 150°C or as the supply voltage approaches the BVCEO of the output transistors. The IC withstands overvoltages to 80V.
The turn-on characteristics are controlled by keeping the output open-circuited until the total supply voltage reaches 14V. The output is also opened as the case temperature exceeds 150°C or as the supply voltage approaches the BVCEO of the output transistors. The IC withstands overvoltages to 80V.
Tuesday, October 13, 2009
This is circuit amplifier contains only an op-amp and four transistors (easily available from your electronics junk box). the op-amp used is uA 741 which produces the required gain.The four transistors are wired as complementary Darlington’s which produces the drive for the speaker.
Skema Rangkaian 12 volt Amplifier
The voltage drop across the resistors R2 and R3, are used as the input of the Darlington pairs . As the input current to the op-amp depends on the level of the signal op amp is amplifying the voltage drop across the resistors R2 and R3 will be proportional to the input signal.These voltage drops are given to the base of Darlington pairs. The amplification is stabilized as a result of the negative feedback from the junction of collectors of Q2 and Q4. The theory may seem little awkward for you.But its working good.Such a simple but stable circuit as this can produce a reasonable output of 12W on a 4 Ohm speaker.
IC Op-Amp UA741
The UA741 is a high performance monolithic operational amplifier constructed on a single silicon chip. The high gain and wide range of operating voltages provide superior performances in integrator, summing amplifier and general feedback applications. The internal compensation network (6dB/ octave) insures stability in closed loop circuits.
Data max Ic UA741
* Symbol Parameter UA741M UA741I UA741C Unit.
* Supply voltage (VCC) ±22 V.
* Differential Input Voltage (Vid ) ±30 V.
* Input Voltage (Vi ) ±15 V.
* Power Dissipation (Ptot) 500 mW.
* Storage Temperature Range (Tstg) -65 to +150 °C.
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Monday, October 12, 2009
This 4W Audio Amplifier circuit is powered by 2 pieces of transistor TIP41. The circuit is very simple and incorporates darlington output transistors that will provide more than enough output current than is needed to drive a 3-ohm speaker. The gain may be pre-set for a variety of input levels, making it suitable for amplifying computer and cassette-deck Line-output levels. The input level is also suitable for use with the TDA7000 receiver. All components are easily available and I will shortly be making this project available as a kit.
Supply voltage: 8 -15 volts
Output power: 5.4 Watts
I/P for full O/P: 30 -4000 mV (RMS)
Noise O/P no I/P: 0.0005 Volts RMS
Supply current (no-signal): 50 mA
Supply Current (Full O/P): 1.9 Amperes
3dB Frequency Response: 42 - 34000 Hertz
6dB Frequency Response: 21 - 62000 Hertz
Distortion at 2-watts: 0.01 % (Vgain=10)
Data transistor TIP 41
- Collector-Base Voltage (VCBO) : TIP41: 40V, TIP41A: 60V, TIP41B: 80V, TIP41C: 100V.
- Collector-Emitter Voltage (VCEO) : TIP41: 40V, TIP41A: 60V, TIP41B: 80V, TIP41C: 100V.
- Emitter-Base Voltage (VEBO): 5V.
- Collector Current (DC): 6A.
- Collector Current (Pulse): 10A.
- Base Current (IB): 2A.
- Collector Dissipation (TC=25°C): 65W.
- Collector Dissipation (Ta=25°C): 2W.
- Junction Temperature (TJ): 150 °C.
- Storage Temperature : - 65 ~ 150 °C.
- DC Current Gain (hFE ): Max 15 - 75.
Monday, October 5, 2009
This is a 5watt stereo power amplifier used IC BA5406. IC BA5406 contains two sets of AF power amplifiers. It delivers 5W x 2 into 3 ohm loads with a 12V supply. It has minimal power-on pop noise and has immunity to supply voltage drop. It also has minimal RF radiation.
Recommended supply voltage: 5-15V. Ideally the power supply should be able to deliver over 2.5 Amps. This means that a typical ‘cheap’ plugin power supply (wall wart) will not be good enough. The power supply leads should be as short as possible. Quiescent current 20-70mA, typically 40mA.
Recommended supply voltage: 5-15V. Ideally the power supply should be able to deliver over 2.5 Amps. This means that a typical ‘cheap’ plugin power supply (wall wart) will not be good enough. The power supply leads should be as short as possible. Quiescent current 20-70mA, typically 40mA.
Skema rangkaian 2 x 5 watt Amplifier IC BA5406 Description
The BA5406 is a monolithic dual OTL power amplifier containing two sets of high-power AF power amplifiers. The device delivers 5 watts x 2 into 30 loads with a 12V supply, or 2.8 watts x 2 into 30 loads with a 9V supply. The BA5406 features minimal power-on pop noise and immunity to supply voltage drop. With its minimal RF radiation, the device is ideally suited for use in stereo radio cassette recorders.
layout IC power BA5406
Features IC BA5406
Minimal power-on pop noise.
Immunity to supply voltage drop (operates down to Vcc=4.5V typ.).
Excellent channel balance.
Low distortion (THD=0.3% at PO=O.5W).
12.pin SIP package for mounting ease and saved space on a PC board.
Ripple filter input (pin 6) can also be used as a muting control input.
Symmetrical pin configuration facilitates art work.
Low thermal resistance of the package makes heat-sink design easy.
Built-in high-frequency phase compensation capacitor.
Minimal RF radiation allows for free system layout.
Amplifier power is a circuit of electronics that is used to strengthen the power (or energy in general). In the field of audio, amplifier will amplify the sound signal (which has been expressed in the form of electric current) on the input it into electric current is stronger at the output. The amount of strengthening is often known by the term gain. Value of the gain is expressed as a function of frequency is called the transfer function.
So the gain is the result of the power output (Pout) and power at the input to its function in the form of frequency. The size of the gain, (G) is usually the Decibel (dB).
2N3055 Power Amplifier
Skema 2N3055 Power Amplifier . The optimal supply voltage is around 30V, but this amp work from 24 to 32V. The maximal input voltage is around 0.8 - 1V. As you can see, in this design the components have a big tolerance, so you can build it almost of the components, which you find at home. The and transistors can be any NPN type power transistor, but do not use Darlington types. The output power is around 150 Watt.
So the gain is the result of the power output (Pout) and power at the input to its function in the form of frequency. The size of the gain, (G) is usually the Decibel (dB).
2N3055 Power Amplifier
Skema 2N3055 Power Amplifier . The optimal supply voltage is around 30V, but this amp work from 24 to 32V. The maximal input voltage is around 0.8 - 1V. As you can see, in this design the components have a big tolerance, so you can build it almost of the components, which you find at home. The and transistors can be any NPN type power transistor, but do not use Darlington types. The output power is around 150 Watt.
Skema Rangkaian 2N3055 Power Amplifiercapacitor C1 regulates the low frequencies (bass), as the capacitance grows, the low frequncies are getting louder.
capacitor C2 regulates the higher frequencies (treble), as the capacitance grows, the higher frequencies are getting quiter.
this is a class B amplifier, this means, that a current must flow through the end transistors, even if there is no signal on the input. This current can be regulated with the 500Ω trimmer resistor. As this current incrases, the sound of the amplifier gets better, but the end transistors are more heating. But if this current decrases, the transistors are not heating so much, but the sound gets worse.
capacitor C2 regulates the higher frequencies (treble), as the capacitance grows, the higher frequencies are getting quiter.
this is a class B amplifier, this means, that a current must flow through the end transistors, even if there is no signal on the input. This current can be regulated with the 500Ω trimmer resistor. As this current incrases, the sound of the amplifier gets better, but the end transistors are more heating. But if this current decrases, the transistors are not heating so much, but the sound gets worse.
Saturday, October 3, 2009
This is a circuit of 1 watt amplifier stereo using two IC LM386N. This circuit belongs to kitsrus.com and the kit is available there or at electronickits.com. This circuit only need 10mA current with best voltage supply is 6-12VDC. No heatsink required for normal usage.
the amplifier circuit only a few external components, the IC contains most of the necessary circuitry. C1, C5 are the input coupling capacitors, which block any DC that might be present on the inputs. C2, C9 maintain DC bias levels in the gain adjustment (feed back) circuit. C4 provides power supply decoupling, and C6, C8 are the output coupling capacitors. C10, R1 and C11, R2 act as zobel networks providing a high frequency load to maintain stability where loud speaker inductive reactance may become excessive. The pot provides adjustable input level attenuation.
layout 1 watt Amplifier stereo
the amplifier circuit only a few external components, the IC contains most of the necessary circuitry. C1, C5 are the input coupling capacitors, which block any DC that might be present on the inputs. C2, C9 maintain DC bias levels in the gain adjustment (feed back) circuit. C4 provides power supply decoupling, and C6, C8 are the output coupling capacitors. C10, R1 and C11, R2 act as zobel networks providing a high frequency load to maintain stability where loud speaker inductive reactance may become excessive. The pot provides adjustable input level attenuation.
layout 1 watt Amplifier stereolist Components :
Capacitors :
C1, C5 2.2 uF / 50Vecap
C2, C9 10 uF / 25V ecap
C3, C7 100 nF mono (104)
C4 100 uF / 16V ecap
C6, C8 470 uF / 16V ecap
C10, C11 47 nF mylar (473)
Resistors :
R1, R2 10 ohm (brown, black, black)
Pot 1 10k ohm dual gang log pot. (A)
Misc. :
Kit 115V2 Printed Circuit Board
IC 1, 2 LM386N Integrated Circuit
8 pin IC socket
2 pin header and jumper 2 sets
Specifications :
- D.C. input : 4 – 12 V at 200 – 500 mA max.
- Idle current : ~ 10 mA
- Power output : > 1 Watt max. @ 8 ohms, 12V DC, ~ 0.4 Watt RMS cont. per channel
- Freq. Resp. : ~ 40 Hz to 100 kHz, 8 ohm, < g="20"> 80 dB, (>90dBA) G = 20, > 60 dB, (>70 dBA) G = 200
- Sensitivity : > 100 mV, G=20, > 10 mV, G=200
- Input Z : ~ 10 k ohm.
This is an audio amplifier circuit which use IC TDA 7052 .There are only 5 external components. C1 is the input coupling capacitor, which blocks any DC that might be present on the input. C2 and C3 provide power supply decoupling, and R2 provides adjustable input level. This can be used as a volume control. The ideal supply voltage of this circuit is about 6-12V and no heatsink required.
List Components :
* C1 : 2.2uF electrolytic capacitor
* C2 : 100nF ceramic
* C3 : 100uF electrolytic
* R1 : 1K ohm resistor
* R2 : 10K ohm potentiometer
* Spindle for potentiometer
* TDA7052 Integrated Circuit
Specifications IC TDA7052 :
D.C. input : 3 – 15 V at <> 1 Watt @ 8 ohms maximum.
> 0.25 Watt RMS continuous
Freq. Resp. > 20 Hz – 20 kHz
~ 10 – 50 kHz, – 3dB
THD <> 70 dBA
Gain ~ 30 dB maximum.
Input Z ~ 10 k ohm.
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Friday, October 2, 2009
Amplifier power is a circuit of electronics that is used to strengthen the power (or energy in general). In the field of audio, amplifier will amplify the sound signal (which has been expressed in the form of electric current) on the input it into electric current is stronger at the output. The amount of strengthening is often known by the term gain. Value of the gain is expressed as a function of frequency is called the transfer function.
So the gain is the result of the power output (Pout) and power at the input to its function in the form of frequency. The size of the gain, (G) is usually the Decibel (dB).
So the gain is the result of the power output (Pout) and power at the input to its function in the form of frequency. The size of the gain, (G) is usually the Decibel (dB).
68 Watt Audio Amplifier LM3886
LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4 load and 38W into 8 with 0.1% THD+N from 20Hz-20kHz.
The performance of the LM3886, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe™) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks.
The LM3886 maintains an excellent signal-to-noise ratio of greater than 92dB with a typical low noise floor of 2.0µV. It exhibits extremely low THD+N values of 0.03% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%.
The performance of the LM3886, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe™) protection circuitry, puts it in a class above discrete and hybrid amplifiers by providing an inherently, dynamically protected Safe Operating Area (SOA). SPiKe protection means that these parts are completely safeguarded at the output against overvoltage, undervoltage, overloads, including shorts to the supplies, thermal runaway, and instantaneous temperature peaks.
The LM3886 maintains an excellent signal-to-noise ratio of greater than 92dB with a typical low noise floor of 2.0µV. It exhibits extremely low THD+N values of 0.03% at the rated output into the rated load over the audio spectrum, and provides excellent linearity with an IMD (SMPTE) typical rating of 0.004%.
Layout IC Power LM3886Notice:
- 68W cont. avg. output power into 4 at VCC = ±28V
- 38W cont. avg. output power into 8 at VCC = ±28V
- 50W cont. avg. output power into 8 at VCC = ±35V
- 135W instantaneous peak output power capability
- Signal-to-Noise Ratio >= 92dB
- An input mute function
- Output protection from a short to ground or to the supplies via internal current limiting circuitry
- Output over-voltage protection against transients from inductive loads
- Supply under-voltage protection, not allowing internal biasing to occur when |VEE| + |VCC| <= 12V, thus eliminating turn-on and turn-off transients
- 11-lead TO-220 package
- Wide supply range 20V - 94V.
mini audio amplifier using IC LM 386.This amplifier is much suitable for small game amplifying applications .The circuit has few components and works of a 12 Volt power supply.You can increase the supply voltage up to 18V for a bit more power, with out changing the components.But I would say 12V is OK. A 4 Ohm speaker can be used as load.Volume can be controlled by connecting a 10k pot at the audio input to the IC.
Skema rangkaian audio amplifier using IC LM 386
Component List:
C1 1 10uf Electrolytic Capacitor
C2 1 470uf Electrolytic Capacitor
C3 1 0.1uF Disc Capacitor
C4 1 2000uf Electrolytic Capacitor 2200uF
R1 1 2.2 Ohm Resistance (Anything Within 10% tolerance)
R3 1 220 Ohm Resistance (Anything Within 10% tolerance)
IC1 1 LM383 IC
IC LM386 Description
The LM386 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 addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.
The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 volt supply, making the LM386 ideal for battery operation.
The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 volt supply, making the LM386 ideal for battery operation.
IC LM386 Features
• Minimum external parts
• Wide supply voltage range: 4V-12V or 5V-18V
• Low quiescent current drain: 4mA
• Voltage gains from 20 to 200
• Ground referenced input
• Self-centering output quiescent voltage
• Low distortion: 0.2% (AV = 20, VS = 6V, RL = 8Ohm, PO = 125mW, f = 1kHz)
• Available in 8 pin MSOP package.
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Thursday, October 1, 2009
This Rangkaian audio Ampilifier is designed to be packed into a mini-speaker box 2, 4 and 8 ohms. This circuit is also equipped with a switch-Bass Booster. can be connected to the output line walkman, mini disc, iPod, CD Player, Computer and other similar devices is its headphone output line.
This circuit of the design without using the IC by using methods that seem somewhat out of date. ampilfier the supply voltage 12v. SW1 switch will produce bass-booster, but at the same time the volume should be increased to compensate for lost power at high frequency.
This circuit of the design without using the IC by using methods that seem somewhat out of date. ampilfier the supply voltage 12v. SW1 switch will produce bass-booster, but at the same time the volume should be increased to compensate for lost power at high frequency.
Skema rangkaian audio amplifier sederhana
in use later, R9 should be set carefully in order to reduce distortions in the sound that emerged. and of course have to make 2 pieces in the circuit to generate a stereo output from this circuit.list Component Of Audio Amplifier:
-P1: 10K Log.Potentiometer
-R1,R2: 33K 1/4W Resistors
-R3: 33R 1/4W Resistor
-R4: 15K 1/4W Resistor
-R5,R6: 1K 1/4W Resistors
-R7: 680R 1/4W Resistor
-R8: 120R 1/2W Resistor
-R9: 100R 1/2W Trimmer Cermet
-C1,C2: 10µF 63V Electrolytic Capacitors
-C3: 100µF 25V Electrolytic Capacitor
-C4,C7: 470µF 25V Electrolytic Capacitors
-C5: 47pF 63V Ceramic Capacitor
-C6: 220nF 63V Polyester Capacitor\
-C8: 1000µF 25V Electrolytic Capacitor
-D1: 1N4148 75V 150mA Diode
-Q1: BC560C 45V 100mA PNP Low noise High gain Transistor
-Q2: BC337 45V 800mA NPN Transistor
-Q3: TIP31A 60V 4A NPN Transistor
-Q4: TIP32A 60V 4A PNP Transistor
-SW1: SPST switch
-SPKR: 3-5 Watt Loudspeaker, 8, 4 or 2 Ohm impedance
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