Class B audio amplifier based on TDA1553

Here is the circuit of a Class B audio amplifier based on TDA1553. TDA1553 is a monolithic audio amplifier class B, containing 2 x 22 watt amplifier in bridge configuration load attached. The amplifier operates from 12V DC and develops intentionaly for car audio applications. The IC also has a lot of good features such as short circuit protection, protection of the load dump, reverse polarity protection, speaker protection, etc.

In the circuit, C5 and C4 are decoupling capacitors C3 input, while setting the delay for speaker protection. C1 and C2 are filter capacitors of the offer.

Notes :

• Assemble the circuit on a good quality PCB.
• Use 12V DC for powering the circuit.
• The circuit can deliver 22W per channel into 4 ohm speakers.
• Fit the IC with a proper heat sink.

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1000W ICs audio amplifier with PA03

This is a series of amplifiers are based on the most high-ic power that I have ever known. Because the output is issued up to 1000 watts with the impedance RL 4Ohm. Current supply 120mA, and 30A output current. Minimum input voltage of about 30V and a maximum voltage up to 150V. This is an audio amplifier that I have come across use ICs that maximum voltage up to 150V and output power up to 1000W , the scheme below gan.

Part List

Resistor

R1 = 10K

R2 = 10K

R3 = 220K

R4 = 0.18R 5W

R5 = 2.2R 2W

R6 = 0.18R 5W

Capacitor

C1 = 1uF

C2 = 1000uF

C3 = 68pF

C4 = 1000uF

Inductor

L1 = 4MH

IC

U1 = PA03

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100W Audio Amplifier with TDA7294

TDA7294 is an integrated, monolithic, Class AB audio amplifier designed precisely for Hi-Fi applications. The IC has a DMOS output stage and can deliver 100W RMS into an 8Ohm speaker at +/-38V dual supply.

In the circuit TDA7294 is configured to provide 100W output power into an 8Ohm loudspeaker at +/- 38V supply. C8 is the input coupling capacitor and the input is applied to the non-inverting input (Pin3) of the IC. C3 and C9 are power supply filter capacitors although C10 and C4 are bypass capacitors. C2 is the bootstrap capacitor.

RC network comprising of R1 and C1 improves the high frequency stability of the amplifier and as well prevents oscillations. R2 and C6 sets the mute time constant while R3 and C5 sets the standby time constant. S1 the mute switch and S2 are the standby switch. R5 is the input resistance and the amplifiers input impedance has a direct relationship to its value. R4 and R6 is employed for setting type closed loop gain and With the used value, gain is 30dB. C2 is a DC decoupling.

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18W Amplifier Schematic Circuit

18W Amplifier Schematic Circuit Part List

P1_____________22K Log. Potentiometer (Dual-gang for stereo)

R1______________1K 1/4W Resistor
R2______________4K7 1/4W Resistor
R3____________100R 1/4W Resistor
R4______________4K7 1/4W Resistor
R5_____________82K 1/4W Resistor
R6_____________10R 1/2W Resistor
R7_______________R22 4W Resistor (wirewound)
R8______________1K 1/2W Trimmer Cermet (optional)

C1____________470nF 63V Polyester Capacitor
C2,C5_________100µF 3V Tantalum bead Capacitors
C3,C4_________470µF 25V Electrolytic Capacitors
C6____________100nF 63V Polyester Capacitor

D1___________1N4148 75V 150mA Diode

IC1________TLE2141C Low noise, high voltage, high slew-rate Op-amp
Q1____________BC182 50V 100mA NPN Transistor
Q2____________BC212 50V 100mA PNP Transistor
Q3___________TIP42A 60V 6A PNP Transistor
Q4___________TIP41A 60V 6A NPN Transistor

J1______________RCA audio input socket

Power supply parts:

R9______________2K2 1/4W Resistor

C7,C8________4700µF 25V Electrolytic Capacitors

D2_____________100V 4A Diode bridge
D3_____________5mm. Red LED

T1_____________220V Primary, 15 + 15V Secondary, 50VA Mains transformer

PL1____________Male Mains plug

SW1____________SPST Mains switch

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150W LM12 based audio amplifier circuit with explanation

LM12 operational amplifier can output currents up to 10A. The LM12 in encapsulated in TO-3 with 4 pins, can support up to 800W and has enough internal protections to prevent slacks from over-currents or over-heating.
You can use LM12CL with 30 V maximum voltage or LM12C with 40V maximum.
The L1 coil has 40 turns 1mm copper, coiled over R4. If you use LM12CL it is recomended to have toroidal transformer 2 x 22V. The output must be between 7 and 12A. Filtering capacitors must have at least 20.000 uF.
LM12 must be mounted with screws on a big heatsink (=<1.5 C/W) and electric isolated form the heatsink

LM12 amplifier circuit diagram

LM12 amplifier PCB layout

More audio amplifier circuits…

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TDA2822 Integrated Amplifier Circuits General

General integrated amplifier circuit external components and need more larger heatsink. This paper presents a simple amplifier circuit, made easy. TDA2822 amplifier integrated circuits used in music players, portable DVD and other audio playback; power is not great but you can satisfy the requirements of the hearing, and the circuit is simple, good sound quality, wide voltage range of characteristics such as the amateur production Small amp better choice.

Circuit as shown in Figure 5-107.TDA2822M amp with an integrated circuit to a BTL, (the use of mono and stereo when two) external components only one resistance and two capacitors, with no heatsink, the playback results were satisfactory.
Selection and installation of components:
IC TDA2822M to 8 feet dual inline package, if available can not buy TDA2822 instead, TDA2822 and TDA2822M the same package, which difference is: TDA2822M from 3 V to 15 V can work, and the maximum operating voltage TDA2822 only 8V. TDA2822 must use the voltage dropped to 8 V below. Numerical informal request R1, 10 k generally choose the carbon film resistors. C1 choice of polyester 0.1 uF capacitor, C2 for 100 uF/16V the electrolytic capacitor.

Figure 5-108 its printed circuit board map.

As a simple circuit, the PCB can be engraved shovel role of the rule of law James Shuimo sandpaper or a small amount of water polishes kraft paper, water wash dry, apply a layer of rosin alcohol solution, stem directly after the solder components to the copper foil surface. Welding good after the inspection correct, then no access to speakers, connected to power, between the positive and negative output voltage should be less than 0.1 V. Connected to speakers, hand-touch input, the speaker should be given greater "Ong" sound. Then try to enter the sound signal. Circuit boards do not have to drilling,


Should be used Note: Because this amp for direct coupling, it can not be with DC input signal components. If a DC input signal components must be input in a series connection of around 4.7-10 uF capacitor separated, otherwise, they will have great DC current flow through speakers, so as fever burned. In practice, if 5-107 plans to conduct appropriate reforms are desirable effect.

To improve the circuit as shown in Figure 5-109.

In use found that the volume opened the largest TDA2822M fever when hot, can give TDA2822M produced a heatsink, generally shown in Figure 5-110. Heatsink can be thick lmm, long 38 mm, width of 25 mm made of aluminum plate. And in the heatsink on the reopening of 5-to 6-10 mm, width l mm the slot, then do along the dotted line into a hot film, "I" shape. When first installed heatsink on the release point in TDA2822M. Click 5-111 (a) use the thin Bangzha to bear. It should be noted that the TDA2822M the pin number written on the side of the heatsink, so as to avoid mistakes when welding. And heatsink, volume open only to the most warm, good cooling effect. This method can also be used for other small integrated circuit heat dissipation. Amp circuit caused by two Walkman stereo power continue, to promote two small speakers, good effect.

You can build on the stereo two-channel input circuit, the use of power when a small point, but has it.

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0 5 WATT MINI AMPLIFIER TDA1015T ELECTRONIC DIAGRAM

0,5 WATT MINI AMPLIFIER TDA1015T ELECTRONIC DIAGRAM

Chances are youll want this amplifier portable. Batteries do the trick fine, but you wont get much power out of a couple of 1.5V cells. Unfortunately the size of a decent amount of battery power will mean that the overall size of this amp will be much bigger and for that there are more benefits to be had using a device like the TDA7052 or TDA2822 for stereo.

Quick ref data of TDA1015T Chip

•     Supply voltage range: 3,6 to 12 V
•     Peak output current: 1 A
•     Output power: 0,5 W
•     Voltage gain power amplifier: 29 dB
•     Voltage gain preamplifier: 23 dB
•     Total quiescent current: 22 mA
•     Operating ambient temperature range: -25 to +150 °C
•     Storage temperature range: -55 to + 150 °C

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Nmos Power Amplifier Series Part 2

Power Amplifier with quasi complementary model is the final power amplifier with the transistors of the same type (N all) or (P all), not using transistor pairs. Connecting post part 1, in section 2 is still to review mosfet power amplifier.

Nmos350 / Nmos500

Two output stage configurations capable of delivering up to 350 watts or up to 500 watts into a 4 ohm load.

 Schema Diagram

 Layout Nmos350

Layout Nmos500

Power Supply

Final Set up And Adjustment

No attempt should be made to set up or test a power amplifier module that is not correctly mounted
on a heatsink. Make sure the main power supply is fused and the work area is clear. First check all
your work and make sure the output devices are insulated from heatsink. The set up is done without
an input or a load connected to the power amplifier.
1. Check the power supply is operating correctly and verify the rail voltages. Switch the power
supply off and check with a multimeter that the rail capacitors have discharged.
2. Correctly connect the ground, positive and negative leads to the power amp module.
3. Remove the PCB fuses and replace with 100 ohm 5 watt resistors. Connect a multimeter
that is set to the 20 volt scale across the positive rail 100 ohm resistor.
4. Check that the power supply connections are correct one last time and switch on. If the
multimeter reading goes off-scale, turn off immediately and find the problem. Check also the
100 ohm 5 watt resistors; they may have gone open cct.
5. If everything seems ok adjust VR2 to set the output stage bias current, by measuring the
voltage across the positive rail resistor. Adjust for a reading of 3 volts per output FET pair. I.e.
For a 6 FET board set for a voltage of 9 volts. This equates to a bias current of 30mA per
FET pair or 90 mA total. For a 10 FET board set for a voltage of 15 volts.
6. If everything seems ok, check the output offset voltage and adjust VR1 to achieve an offset of
less than 10 mV.
7. All being well switch off, back off the bias control trimmer (VR2) and replace the 100 ohm
resistors with 10 ohm 1 watt resistors. Switch on again and re-adjust VR2 to get 0.3 volts per
per FET pair across the positive rail 10 ohm resistor.
8. Switch off, remove the resistors and put the fuses back in. Switch on, re-check the offset
voltage and adjust with VR1 if necessary.
The amp module is ready, connect the input and output and enjoy.

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100W Hi End Audio Amplifier SymAsym5

Symasym5_3
Symasym5, is a "cute" power amplifier, designed with quality but still low price in mind. This resulted in a ClassAB BJT amplifier, using only TO92 transistors for input and VAS, with a reasonable part count. The topology used is well known and consist of a single diffamp for input, plus a 2nd diffamp with current mirror for VAS. This is followed by normal darlington EF outputstage using modern high beta devices. The circuit uses large amounts of feedback over the whole audioband and an unconventional feedback compensation scheme.
Right now symasym is designed to be driven directly from a CD/DVD-player, simply place a 22k poslog stereo pot between player and symasym. (as voltage divider)

Update

The at least change is to reduce C14 from 22pF to 10pF, but i recommend to follow Pavels advice.

I recommend C14 with 10pF also for MJLs, this increases safety margin.

Do not forget to read Pavels Review! A very promising evaluation of the qualities to be expected from symasym. Thanks Pavel !

Another update are the resistors R31/32 to be increased from 22ohm to 47ohm.

Symasym5_3 is an update of v5.2, with an improved board layout concerning power gnd, resulting in lower thd for high frequencies, giving more clarity in sound. The Page for symasym5_2 still exists.

If the gain is too high because symasym is driven from preamp, R30 can be increased from 499ohms to 1k, but in this case R16/19 (22 or 33 ohms, not on schematic, REs to Q1/2) are required to keep feedback at same level and

Some Specs

• THD: ~0.005% (measured) simd: 0.002%
• Power into 8ohm: 60 watts
• Power into 4ohm: 100 watts
• Gain: 32dB (~1:40)  full output at 0.7v input (0.5v rms)
• Feedback: 57dB
• GainBandWidth: ~400Mhz
• Slewrate: ~20v/us (symetrical)
• Supply voltage: +/- 36v
• Biasing: 55ma, ~12mv across a single 0.22 ohm
• Measurings: RMAA Symasym5  The measuring setup itself is far from perfect, but gives a good idea !
• Frequency response: 3.2hz to 145khz (-1db) using 4.7uf input cap
• Phaseshift at 10khz: <3°
• More will follow !

Schematic

Part List

Transistors:

Device	Qty	Value	Notes
Q1,Q2	2	MPSA18	can be substituted by BC550C (pins reversed !)
Q7,Q8	2	BC546B	or maybe 2n5551 (pins reversed !)
Q3,Q9	2	2N5551	OnSemi/Fairchild/Philips
Q4,Q5,Q12	3	2N5401	OnSemi/Fairchild/Philips
T1	1	BD139	or bd135, bd135-16
U$5	1	MJE15030	OnSemi
U$6	1	MJE15031	OnSemi
U$3	1	MJL3281A	OnSemi
U$4	1	MJL1302A	OnSemi

Capacitors:

Device	Qty	Value	Notes
C14	1	10pF (has been 22pF)	Mica
C2,C7	2	100pF	Mica
C3,C4	2	330pF	Mica
C18	1	47nF	Wima MKS2
C5, C6, C10, C11, C16, C17, C20	7	100nF	Wima MKS2
C1	1	10uF (4.7uF also fits)	Wima MKS2
C8,C9	2	100uF	Electrolytic 63v (at least 40v)
C19	1	470uF	Electrolytic 16v
C12,C13	2	1000uF	Electrolytic 63v (at least 40v)

Resistors:

Device	Qty	Value	Notes
R27,R28	2	0R22	5Watts
R1, R3	2	1R2	2Watts metal film
R4	1	4R7	2Watts metal film
R7	1	10	2Watts metal film
R2	1	10	250mW metal film
R8, R9	2	22	250mW metal film
R31, R32	2	47 (have been 22)	250mW metal film
R26	1	33	250mW metal film
R10	1	68	250mW metal film
R15,R17	2	150	250mW metal film
R11	1	220	250mW metal film
R24,R30	2	499 (or 500)	250mW metal film
R5,R6	2	680	250mW metal film
R13,R23	2	2k	250mW metal film
R12,R14,R29	3	22k	250mW metal film
R18,R20	2	47k	250mW metal film
R22	1	1k pot	Piher, small (470ohm might be better)

Miscellaneous:

Device	Qty	Value	Notes
F1,F2	2	2.5T Fuse	Slow blow
F1,F2	2	---	Fuse holder
L1	1	---	0.6mm isolated (enamelled) copper wire wounded around R7 forming the output coil.

Recomended Part

• All resistors are standard metal film 250mW except: R1/3/4/7, these are 2W metal film, and the 0.22ohm beeing 5W.
  Around R7 is wounded a 0.6mm isolated (enamelled) copper wire forming the output coil. (~12 windings)
  For c19 i used 470uf/16v, all other electrolytics 63v. The 10/100/330pF should be mica-caps.
  The 100nf and 47nf is recommended to be Wima MKS2 (or better), also for C1 i suggest Wima MKS2, 4.7uf is enough.
  For Trimpot i use a Piher. The MPSA18 can be substituted by BC550C, for all other parts i do not recommend changes, especially the feedback network (r29/30) should be kept unchanged, feedback compensation is very delicate for this circuit !
• Be careful when substituting the MPSA18 with BC550C, the pinout is reversed between these 2 transistors !!!
• The bias is adjusted via the trimpot (R22). Recommended bias is 55ma, resulting in 12mv across a single 0.22ohms or 24mv across both 0.22ohms. Connect a DMM to the upper wires of these resistors and adjust trimpot until DMM reads wanted voltage.

Symasym5 biasing: (for debugging)

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20 Watt Class A Power Amplifier Circuit

A single-ended Class-A amplifier is essentially one where there is only one active driven output device. The passive "load" may be a resistor, an inductor (or transformer) or - as in this amplifier - a current sink. Of the three basic options, the current sink offers the highest linearity for the lowest cost, so is the ideal choice.

Some esoteric (some might say idiosyncratic) designs use inductors or 1:1 transformers, but these are bulky and very expensive. Unless made to the utmost standards of construction, they will invariably have a negative effect on the sound quality, since the losses are frequency dependent and non-linear.

This amp uses the basic circuitry of the 60W power amp (see Index), but modified for true Class-A operation - it should be pretty nice! This amp has been built by several readers, and the reports I have received have been very positive.

With simulations, everything appears to be as expected, but although I have yet to actually build it and test it out thoroughly, no-one has had any problems so far. Using +/-20 Volt supplies - either conventional, regulated or using a capacitance multiplier, it should actually be capable of about 22 W before clipping, but expect to use a big heatsink - this amp will run hot.

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Stereo High Power Audio Amplifier

This is a stereo amplifier circuit which has a high output power and excellent sound quality. Amplifier circuit has a very high gain output stage resulting in the deterioration of signal noise distance. This amplifier circuit having an output power of more than 400 Watt x 2 (Stereo) with the speaker impedance 4 Ohm - 8 Ohm. Power supply voltage circuit to supply this high power amplifier with maximum - + 75 Volt DC. Heres the scheme of High Power Amplifier :

High Power Amplifier Circuit Diagram

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IC Amplifier with HA13118 Diagram

IC amplifier 18 watt circuit is an IC digit HA13118 Hitachi powerfully. with the intention of the IC yearn for take place integrated amplifiers, categorize AB. And this cycle is to assistance a association circuit. to the same degree a answer, growth toll up to 55 dB. And pressure from 8-18 volt the current 1-2 amps, with not as much of than 0.2% distortion by 1W. And response. frequencies from 30 Hz-30 kHz.

IC Amplifier with HA13118 Circuit Diagram

As entering the power supply circuit, and paid into the audio input. The audio is through VR1 adjusts the level of the audio sign. And pass the C1 coupling signal. The C2 eliminate the interference. From the audio signal to come to pass sent through to the input pin on pin 3 of IC1. so as to this circuit to circuit modish the form of conduit circuits otherwise expansion of the not here navigation. And restore channels laid back, to follow a elevated watt power. The observations from the pin 15 which is the output of absent channel speakers are connected to individual fringe. And the other side of the speakers are connected to the output of pin 8, which is the output of the right. The C7 and C8 acting reaction hint to the circuit’s frequency response is better. The C9, C10, R1 and R2 willpower wait on unconcerned the campaign. And C11, C12 serve to filter the light as it should be to prevent several din shock.

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Condenser Pre Amplifier LM 1458

This is a simple preamplifier circuit for electret condenser microphone.
using a LM1458 dual op amp IC. The circuit takes the audio signal rom the condenser microphone and amplifier it, so you can use the microphone as the input to some device which wouldn’t normally accept microphone level signals .

Schematic Circuit of Microphone Electret

Condenser Pre Amplifier

The circuit requires a 6-9 volt supply. Output of the microphone amplifier can be made variable by connecting a 10kΩ potentiometer . Circuit’s gain can be increased by men perbesar the value of 47K, depending on the input sensitivity of the main amplifier system. The microphone should be housed in a small round enclosure.



List componet of condenser pre-amp mic circuit

Q1,Q2    : LM1458 Op-Amp
R1,R2,R3 : 4.7k ohm resistor
R4, R5   : 10k ohm resistor
R6,R7    : 47k ohm resistor
C1,      : 0.22uF ceramic capacitor
C2       : 1uF ceramic capacitor


Absolute maximum ratings of LM 1458 IC
Supply Voltage               :  ±18V
Power Dissipation            : 400 mW
Differential Input Voltage   : ±30V
Input Voltage                : ±15V
Output Short-Circuit Duration: Continuous

Operating Temperature Range  : 0°C to +70°C
Storage Temperature Range    : −65°C to +150°C
Lead Temperature             :(Soldering, 10 sec.) 260°C

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3000W Stereo Power Amplifier Circuit

Circuit Power Amplifier has a power output of up to 1500W RMS power amplifier circuit is often used to power sound systems keperlun for outdor. In the final image can be seen a series of power amplifiers using 10 sets of power transistors for the ending.

This power amplifier circuit using a transistor amplifier from the front, signal splitter, driver and power amplifier. Current consumption required is quite large power amplifier that is 15-20 A 1500W power amplifier circuits for this. Supply voltage needed by the power of this amplifier is the optimal working order symmetrical 130VDC (130VDC-130VDC ground). 1500W amplifier circuit below is a picture series of mono, stereo if you want to make it necessary to make two copies of the circuit. For more details can be viewed directly image the following 1500W power amplifier circuit.

The series of High Power Amplifier 1500W With Transistor

Click Image to view larger

In the above series of power amplifer 1500W is equipped to control a DC Offset function to set the power amplifier is turned on at the moment and with no input signal then the output should be 0VDC. Then also equipped with a flow regulator to the power amplifier bias. Final part of this power amplifier requires adequate cooling to absorb the heat generated. Power amplifier is not equipped with a speaker protector, therefore it is necessary diapsang protector on the speaker output so that when the power amplifier is not the case turned on the beat to the speaker that can damage the speaker.

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High HiFi Power Amplifier with MOSFET

Circuit amplifier "High Power HiFi Power Amplifier With MOSFET" is capable of giving the output power to the load speakers 240Watt and 380Watt 8Ohm to load 4Ohm speakers.

Voltage source to a series of power amplifiers "High Power HiFi Power Amplifier With MOSFET" This is a CT 25V 50V 25V to 50V CT of transformer CT. In making this power amplifier needs to be installed heatsinks on the power amplifier (MOSFET) in order to avoid excessive heat. The series of power supply to power amplifer can use the transformer 5A-20A and 35A mounted diode bridge and capacitors for a minimum of 2x 10.000uF electrolit. Details for the power amplifier circuit can be seen in the following figure.

High Power Series HiFi Power Amplifier With MOSFET can modify to increase power output by doubling the final power amplifier is based on the diiginkan. Power generated from doubling the final power amplifier will also double its power output of power amplifier circuit "High Power HiFi Power Amplifier With MOSFET" it.

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Stereo amplifier 3W 3W using ic BA5406

IC number is BA5406 IC stereo audio amplifier size 3 watt + 3 watt.The circuit is small and easy to create.Suitable for expanding the use of music in a private room.Or may be used in any trial.
When raising the power supply 12 volts to this circuit.Input the left and the right to access the input pin, to pin 5 and pin 8 of IC.The signal through the C1 and C2 are coupling signal.To prevent DC, to interfere in the circuit.Then the amplifier IC is not a return phase.Exit output, Pin 2 and Pin 11.And the output signal out of each channel, left and right through C9 and C10.Add to block DC and low frequency stability.Then went out to the speakers.The C7 and C8 are connected to pins 3 and pin 10 of IC, respectively.The pin 3 and pin 10 is pin Boot Strap will help to gain a better.The C5 and C6 are connected to pins 6 and Pin 7.A pin Filter, the C5 and C6 serve cut noise from the IC.

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HA 13118 bassed 18W audio amplifier circuit and explanation

This audio amplifier circuit diagram is a class AB audio power amplifier based on the Hitachi HA13118 audio integrated circuit . The Hitachi HA13118 audio amplifier circuit provide a high power output from a low voltage supply using the bridge tied load method, and a high gain of 55dB. This audio amplifier is ideal for audio applications where the input signal has a very low level .

The Hitachi HA13118 audio amplifier circuit can provide a maximum 18W power in a 4 ohms load using 18 volts DC power Supply but also can be obtained various output power : > 5W RMS on 8 ohm load using 18V DC supply , > 6W RMS on 4 ohm load using 12V DC supply .

Other specifications for this amplifier are :

S/N ratio : > 70 dB , THD <0.2% @ 1w , freq. response : ~ 30 hz to 30 khz, input level : <25 mv , input impedance ~ 30 k ohm .

For the Hitachi HA13118 audio amplifier circuit you will need a power supply that will provide a DC voltage between 8 and 18Vand at least 1 to 2 Amps.

If you want to obtain the maximum output power you will need a power supply that will provide 18 volts DC at more than 2 A , and if you will use a 4 ohms speaker .

The construction of this power supply is very simple and is require few external components .

Be careful when soldering the IC not to use excessive heat. If it’s possible use some heat sink compound between the heat sink & the IC .

If you need volume control or to attenuate the input signal you can connect a logarithmic potentiometer at the input pin .

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