Showing posts with label stereo. Show all posts
Showing posts with label stereo. Show all posts
Wednesday, November 19, 2014
TA8210AH Stereo Car Power Amplifier
IC TA8210AH By using this you can apply a series of audio power amplifier is the car audio system. In general, all the speakers in the car using a subwoofer speaker, and woofer. Because the car is not big room so the sound is being required is not too high.
Audio amplifier circuit can work at a minimum voltage 12-volt DC, if supplied under voltage 12-volt amplifier work will be less than the maximum. This amplifier output power up to 200W or 2 x 100W stereo with 8 ohm impedance.
Audio amplifier circuit can work at a minimum voltage 12-volt DC, if supplied under voltage 12-volt amplifier work will be less than the maximum. This amplifier output power up to 200W or 2 x 100W stereo with 8 ohm impedance.
Part List :
R1 =1K
R2 =50K trim
R3 =1K
R4 =50K trim
R5 =680R
R6 =680R
R7 =150K
R8 =2R2
R9 =2R2
R10=2R2
R11=2R2
Capacitor
C1 =1uF
C2 =1uF
C3 =47uF
C4 =47uF
C5 =100n/400V
C6 =220uF
C7 =220uF
C8 =100n/400V
C9 =100n/400V
C10=100n/400V
Intregated Circuit
IC1=TA8210AH
Connector
X2-3=in R
X2-2=gnd
X2-1=in L
X1-1,X1-2=Out R
X1-3,X1-4=Out L
Monday, October 27, 2014
200W Stereo High Power Amplifier LM3886
This audio amplifier designed uses two LM3886 per channel, in parallel circuit, based on the PA100 parallel amplifier detailed in National Semiconductors application note - AN1192. This amplifier can deliver about 50W into a 8-ohm speaker and 100W into a 4-ohm speaker. This is a stereo amplifier and therefore 4 LM3886s are used.
The LM3886 circuit is in a non-inverted configuration, so the input impedance is determined by the input resistor R1, i.e. 47k. The 680 ohm and 470pF resistor capacitor filter network is used to filter out the high frequency noise at the RCA input. The 220pF C4 and C8 capacitors are used to shot out the high frequency noise at the LM3886 input pins.I used high quality audio grade capacitors at several locations: 1uF Auricap at the input for DC blocking, 100uF Blackgate for C2 and C6, and 1000uF Blackgate at the supply filter.
The PCB is designed in a way that the power ground is separated from the signal ground, as you can see from the below layout. The signal ground is located in the middle and surrounded by the power ground. There is a thin trace near C5 connecting them. The PCB layout is done by using PADS PowerPCB 5.0. I think it is a powerful layout software.
Amplifier Printed Circuit Board (PCB)
Amplifier Power Supply
The power supply used is a regulated power supply. I used 10000uF per rail before the LT1083 regulator. After the regulator, I have 100uF on the regulator board. The advantage of using regulator is that the power supply ripple voltage is removed. If power regulation is not used, I can hear very little 50/100Hz hum from the speaker.
The high current MUR860 diode is used to ensure high current flow. The voltage regulator used is LT1083, it can provide about 8A of current. Transformer used here is a 500VA 2x 25V. The power supply is then regulated by 2 LT1083, after the regulation, the voltage is 30V.
I did some DC measurement and the result is quite good, I got 7 mV of DC offset at the speaker terminal. The voltage difference between the output of the 2 chips is less then 1 mV.
The sound of this amplifier is similar to my LM3875 amplifier, which is very clean and detail. It has no hum, no hiss and no noise. Compared to the LM3875 Gainclone, this amp can deliver twice the power to my 4-ohm speaker, and it improves the dynamics and bass punch a lot.
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| LM3886 Power Amplifier Schematics |
The PCB is designed in a way that the power ground is separated from the signal ground, as you can see from the below layout. The signal ground is located in the middle and surrounded by the power ground. There is a thin trace near C5 connecting them. The PCB layout is done by using PADS PowerPCB 5.0. I think it is a powerful layout software.
Amplifier Printed Circuit Board (PCB)
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| Amplifier Printed Circuit Board Bottom |
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| Amplifier Printed Circuit Board Top |
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| Amplifier Printed Circuit Board |
The power supply used is a regulated power supply. I used 10000uF per rail before the LT1083 regulator. After the regulator, I have 100uF on the regulator board. The advantage of using regulator is that the power supply ripple voltage is removed. If power regulation is not used, I can hear very little 50/100Hz hum from the speaker.
The high current MUR860 diode is used to ensure high current flow. The voltage regulator used is LT1083, it can provide about 8A of current. Transformer used here is a 500VA 2x 25V. The power supply is then regulated by 2 LT1083, after the regulation, the voltage is 30V.
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| Power Supply Recomended |
The sound of this amplifier is similar to my LM3875 amplifier, which is very clean and detail. It has no hum, no hiss and no noise. Compared to the LM3875 Gainclone, this amp can deliver twice the power to my 4-ohm speaker, and it improves the dynamics and bass punch a lot.
Sunday, September 21, 2014
Stereo Tube Power Amplifier Schematic
This is the schema diagram of stereo tube power amplifier. It applies 3 types of tube that are 2 6SF5 GT high-mu triodes, 1 5Y3 GT vacuum rectifier, and 2 6K6 power beam amplifiers. The Audio input can be from any two-channel line level device such as a television, CD player, or VCR. It is of the tube type, using only 5 tubes total with no more than about 45 Watts power consumption from the outlet.
Components List:
R1,R10,R13 = 2.2M Ohm Potensiometer
R2 = 470K Ohm
R3 = 1M Ohm
R4 = 220K Ohm
R5 = 330 Ohm 2W Resistor
R6 = 220K Ohm
R7 = 2.2M Ohm
R8 = 1M Ohm
R9 = 720 Ohm 20W Resistor
R11 = 33K Ohm
R12 = 22K Ohm
C1,C9 = 4nF 400V Capacitor
C2 = 50nF 600V Capacitor
C3 = 20uF/25V
C4 = 10nF 400V Capacitor
C5 = 200pF 400V Ceramic Disc Capacitor
C6,C7 = 15uF 450V Capacitor
C8 = 15uF 400V Capacitor
T1 = 117V Primary, 350VCT Secondary, 6.3V Secondary, 6.3V Secondary
T2 = 7600 Ohm Primary, 4 or 8 Ohm Secondary
SW1 = SPST Switch
SP1,SP2 = 12" or smaller, 4 or 8 ohm speakers
MISC = 5 tube sockets, 2 RCA jacks, PC board or chassis, wire, knobs, etc.
Stereo Tube Power Amplifier Circuit Notes:
- C8 is for radio interference suppression and may be omitted.
- The 6V6 GT tube may be substituted for the 6K6 to lower power requirements.
- The 5Y3 GT tube should be mounted in a vertical position and be well ventilated. The 6K6 and 6SF5 tubes can be mounted in any position.
- The power supply portion of this unit may be used for anything requiring 290-320v DC up to about 3 amperes.
- Controls should have an audio taper.
Thursday, September 18, 2014
1 W Home Stereo Amplifier Wiring diagram Schematic
This is a one watt home stereo amplifier module project using the KA2209 IC from Samsung, which is equivalent to the TDA2822. It operates from 3-12V DC & will work from a battery since the dormant current drain is low. It requires no heat sink for normal use. The input & output are both ground referenced. Maximum output will be obtained with a 12V power supply & 8 ohm speaker, however it is suitable for driving headphones from a supply as low as 3V.
The Specifications of the home stereo amplifier :
The Specifications of the home stereo amplifier :
D.C. input : 3 – 12 V at 200 – 500 mA max
Idle current : approx. 10 mA
Power output : > 1 Watt max. 4-8 ohms, 12V DC
Freq. Resp. : approx. 40 Hz to 200 kHz, 8 ohm, G=10
THD : < 1 % @ 750 mW, 4-8 ohm, 12V
Gain : approx. x10 (20 dB) OR x100 (40dB)
S/N ratio : > 80 dB, G = 20 dB
Sensitivity : < 300 mV, G = 20 dB
Input Impedance : approx. 10 k ohm
Idle current : approx. 10 mA
Power output : > 1 Watt max. 4-8 ohms, 12V DC
Freq. Resp. : approx. 40 Hz to 200 kHz, 8 ohm, G=10
THD : < 1 % @ 750 mW, 4-8 ohm, 12V
Gain : approx. x10 (20 dB) OR x100 (40dB)
S/N ratio : > 80 dB, G = 20 dB
Sensitivity : < 300 mV, G = 20 dB
Input Impedance : approx. 10 k ohm
Description
The gain is adjustable from ten to 100, i.e. twenty to 40 dB. Start with feedback resistors R1 and R3 of 1k ohm, this will give a gain of ten which ought to be adequate for most applications. In case you need more gain, you can remove resistors R1 and R3.This will give a gain of about 100, or 40 dB.The input attenuation can be adjusted by the potentiometer which can be used as a volume control. The IC gain ought to be kept as low as necessary to accomplish full output, with the in put potentiometer and your signal source at maximum.
1 W Home Stereo Amplifier Circuit Diagram
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1 W Home Stereo Amplifier Circuit Diagram
Voltage Gain = 1+ R1/R2 = 1+R3/R4, however the maximum gain with no outside feedback is about 100, or 40dB. (GdB = 20log Gv)
This will keep the signal to noise ratio as high as feasible. Additional gain provided by the amplifier will reduce the S/N ratio by a similar amount, since the input noise figure is constant. Other values for R1 and R3 of between 1k and 10k ohm can be used if an intermediate gain level is necessary.
This will keep the signal to noise ratio as high as feasible. Additional gain provided by the amplifier will reduce the S/N ratio by a similar amount, since the input noise figure is constant. Other values for R1 and R3 of between 1k and 10k ohm can be used if an intermediate gain level is necessary.
If driving a pair of headphones, you may also need a 100 ohm resistor in series with each output to reduce the output level, depending on headphone impedance & sensitivity. Make positive you start with the volume right down to check. Numerous headphones may be driven from the amplifier in the event you wish, since most headphones have at least 16 ohm impedance, or more often 32 ohm.
There are only a few outside parts, the IC contains most of the necessary schemary. R1,R2 and R3,R4 are the feedback resistors. C1 provides power supply decoupling. C2 and C3 are the input coupling capacitors, which block any DC that might-be present on the inputs. C4,C5 block DC in the feed back schema from the inverting inputs, and C6,C7 are the output coupling capacitors. C8, R5 and C9,R6 act as Nobel networks providing a high frequency load to maintain stability at frequencies where loud speaker inductive reactant may become excessive. The pot provides adjustable input level attenuation.
Monday, September 15, 2014
TDA1521 TDA1521Q 12W Stereo Amplifier
This is a stereo audio amplifier schema that provides 12W output power on each audio channel. This simple schema is built on a single integrated schema of TDA1521 / TDA1521Q, and only supported by few external components.
TDA1521/TDA1521Q is a dual high-fidelity audio amplifier encapsulated in a plastic 9-leads. The device is specially designed for power supply applications (eg, stereo TV and radio). A heatsink is needed to prevent overheating the IC.
TDA1521/TDA1521Q features:
Download the TDA1521/TDA1521Q Datasheet Here
Here continue read..
TDA1521/TDA1521Q is a dual high-fidelity audio amplifier encapsulated in a plastic 9-leads. The device is specially designed for power supply applications (eg, stereo TV and radio). A heatsink is needed to prevent overheating the IC.
TDA1521/TDA1521Q features:
- Requires very few external components
- Low offset voltage between output and ground
- Input muted during power-on and off
- (no switch-on or switch-off clicks)
- Hi-fi according to IEC 268 and DIN 45500
- Excellent gain balance between channels
- Short-schema-proof
- Thermally protected
Download the TDA1521/TDA1521Q Datasheet Here
Thursday, September 4, 2014
BA5406 Stereo Amplifier Circuit
BA5406{is a monolithic integrated stereo amplifier from ROHM semiconductors. It will deliver 5W per channel into a 4 ohm loudspeaker at 9V supply. Amplifiers based on BA5406 doesnt need an output coupling transformer and can be operated from single supply.
In the circuit diagram, BA5406 is configures to deliver 5×2 watts into 4 ohm loudspeakers at a supply voltage of 9V. Capacitor C3 is a power supply filter capacitor. C11 and C12 are input DC decoupling capacitors for the left and right channels.
C3 and R2 forms a Zobel network for the left output while C6 & R3 forms the same for the correct channel. Purpose of the Zobel network is to cut back oscillations and improve high frequency stability of the amplifier. Potentiometers R5 and R6 serves as the volume control for the left and right channels. CapacitorsC4 and C8 couple the outputs of the amplifier to the speakers. C9 and C10 are noise filtering capacitors. C1 and C5 are bootstrap capacitors for the left and right channels.
In the circuit diagram, BA5406 is configures to deliver 5×2 watts into 4 ohm loudspeakers at a supply voltage of 9V. Capacitor C3 is a power supply filter capacitor. C11 and C12 are input DC decoupling capacitors for the left and right channels.
C3 and R2 forms a Zobel network for the left output while C6 & R3 forms the same for the correct channel. Purpose of the Zobel network is to cut back oscillations and improve high frequency stability of the amplifier. Potentiometers R5 and R6 serves as the volume control for the left and right channels. CapacitorsC4 and C8 couple the outputs of the amplifier to the speakers. C9 and C10 are noise filtering capacitors. C1 and C5 are bootstrap capacitors for the left and right channels.
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