Sunday, November 15, 2009
Bronchi unharnessing it is realised with the help of networking of two resistances 33KW and 330W and a capacitor 100mF, which finally ensures factor of aid equal with 100. Finally, at the same time with the exit exists networking RC (0,1mF - 4,7 Ohm) that it attends to the minimisation of phenomenon crossover. The amplifier can be supplied from a line of double polarity. Still it can function under a wide region of tendencies (±10V as ±28V). The requirements of current depend from the force of expense and it can they begin from 120mA up to 1A. It is very important the catering to be sufficiently unharnessing, so that is avoided imports of annoying noises.
Gambar PCB Amplifier stereo STK465Saturday, November 14, 2009
The TDA 2009 IC has also built in features such as short circuit protection,thermal protection, overload protection etc using very low external components.The most interesting factor I see about this IC is that it require no dual supply.
Notes:
Fit a proper size heat sink to TDA 2009
All capacitors in this circuit must be rated above 25 V.
The TDA2009Ais class AB dual Hi-Fi Audio power amplifier assembled in Multiwatt [ package, specially designed for high quality stereo application as Hi-Fi and music centers.
Supply Voltage...................................... 28 V
Io Output Peak Current (repetitive f . 20 Hz)....... 3.5 A
Io Output Peak Current (non repetitive, t = 100 ms). 4.5 A
Ptot Power Dissipation at Tcase = 90 °C............. 20 W
Tstg, Tj Storage and Junction Temperature........... – 40, + 150.
Notes
- Use 18V DC for powering this circuit.
- TDA2003 must be fitted with a heat sink.
This circuit designed as per the datasheet from the manufacturer and found to be working fine. Capacitor C7 performs the job of input DC decoupling.R2 and R3 is used to set the gain of the amplifier.C3 and R1 determines the upper cut off frequency.C6 and R4 and meant for increasing stability at high frequencies. Capacitor C5 couples the output to the speaker.
Pin TDA 2003Absolute Maximum Rating IC TDA 2003
Peak supply voltage (50ms)............ 40 V
DC supply voltage..................... 28 V
Operating supply voltage.............. 18 V
Output peak current (repetitive)...... 3.5 A
Output peak current (non repetitive).. 4.5 A
Power dissipation at Tcase = 90°C..... 20 W
Tj Storage and junction temeperature...-40 to 150 °C.
Friday, November 13, 2009
Isolation Triac Driver Circuit - Resistive Load
Isolation Triac Driver Circuit - Inductive Load with Sensitive Gate Triac (IGT ≤15 mA)
Isolation Triac Driver Circuit - the “hot” side of the line is switched and the load connected to the cold or ground side.
OPTOISOLATORS TRIAC DRIVER OUTPUT
DESCRIPTION
The MOC301XM and MOC302XM series are optically
isolated triac driver devices. These devices contain a
AlGaAs infrared emitting diode and a light activated silicon
bilateral switch, which functions like a triac. They
are designed for interfacing between electronic controls
and power triacs to control resistive and inductive loads
for 115/240 VAC operations.
FEATURES
• Excellent IFT stability IR emitting diode has low degradation
• High isolation voltage minimum 5300 VAC RMS
• Underwriters Laboratory (UL) recognizedFile #E90700
• Peak blocking voltage
-250V-MOC301XM
-400V-MOC302XM
• VDE recognized
-Ordering option V
Isolation Triac Driver Circuit - Resistive Load
Isolation Triac Driver Circuit - Inductive Load with Sensitive Gate Triac (IGT ≤15 mA)
Isolation Triac Driver Circuit - the “hot” side of the line is switched and the load connected to the cold or ground side.
OPTOISOLATORS TRIAC DRIVER OUTPUT
DESCRIPTION
The MOC301XM and MOC302XM series are optically
isolated triac driver devices. These devices contain a
AlGaAs infrared emitting diode and a light activated silicon
bilateral switch, which functions like a triac. They
are designed for interfacing between electronic controls
and power triacs to control resistive and inductive loads
for 115/240 VAC operations.
FEATURES
• Excellent IFT stability IR emitting diode has low degradation
• High isolation voltage minimum 5300 VAC RMS
• Underwriters Laboratory (UL) recognizedFile #E90700
• Peak blocking voltage
-250V-MOC301XM
-400V-MOC302XM
• VDE recognized
-Ordering option V
Thursday, November 12, 2009
List Component
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
Note:
- Q3 and Q4 should be cooler or heatsink.
- Good Grounding very influential, if not better then the grounding of the power amplifier hum will be heard. Ground A1, P1, C2, C3 & C4 are connected to a ground point, while the ground is connected at point C6 output ground.
Friday, November 6, 2009
There is a 6 watt Stereo Amplifier based IC LA4440. This circuit very simple because uses very less components other than the IC LA4440.
Features IC4440:
Built-in 2 channels (dual) enabling use in stereo and bridge amplifier applications.
Dual : 6Watt *2 (typ.)Bridge : 19Watt (typ.)
Minimun number of external parts required.
Small pop noise at the time of power supply ON/OFF and good starting balance.
Good ripple rejection : 46dB (typ.)
Good channel separation.
Small residual noise (Rg=0).
Low distortion over a wide range from low frequencies to high frequencies.
Easy to design radiator fin.
Built-in audio muting function.
Built-in protectors.
a. Thermal protector
b. Overvoltage, surge voltage protector
c. Pin-to-pin short protector
Pin
2 IN 1
3 Preamp. GND
4 Audio Muting
5 DC
6 IN2
7 NF2
8 Power AMP GND2
9 B.S2
10 OUT2
11 Vcc
12 OUT1
13 B.S1
14 Power AMP GND1
