The TDA 2050 is a monolithic integrated circuit in Pentawatt package, intended for use as an audio class AB audio amplifier. Thanks to its high power capability the TDA2050 is able to provide up to 35W true rms power into 4 ohm load @ THD = 10%, VS = ±18V, f = 1KHz and up to 32W into 8 ohm load @ THD = 10%, VS = ±22V, f = 1KHz. Moreover, the TDA 2050 delivers typically 50W music power into 4 ohm load over 1 sec at VS=
22.5V, f = 1KHz.
The high power and very low harmonic and crossover distortion (THD = 0.05% typ, @ VS = ±22V, PO = 0.1 to 15W, RL=8ohm, f = 100Hz to 15KHz) make the device most suitable for both HiFi and high class TV sets
- High output power
- (50w music power IEC 268.3 rules)
- High operating supply voltage (50v)
- Single or split supply operations
- Very low distortion
- Short circuit protection (out to Gnd)
- Thermal shutdown
SHORT CIRCUIT PROTECTION
The TDA 2050 has an original circuit which limits the current of the output transistors. The maximum output current is a function of the collector emitter voltage; hence the output transistors work within their safe operating area. This function can therefore be considered as being peak power limiting rather than simple current limiting.
It reduces the possibility that the device gets damaged during an accidental short circuit from AC output to ground.
The presence of a thermal limiting circuit offers the following advantages:
1)An overload on the output (even if it is permanent), or an above limit ambient temperature
can be easily tolerated since the Tj cannot be higher than 150°C.
2)The heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no possibility of device damage due to high junction temperature. If for
any reason, the junction temperature increases up to 150°C, the thermal shutdown simply reduces the power dissipation and the current consumption.
Schematic of Amplifier with TDA2050
List of components for assembly of the amplifier tda2050
|C1||2.2µF – Electrolytic or polyester capacitor|
|C2||100µF – Electrolytic capacitor|
|C3, C7||1000µF – Electrolytic capacitor|
|C4||22µF – Electrolytic capacitor|
|C5||100nF (104) – Ceramic capacitor|
|C6||0.47µF – Polyester capacitor|
|INPUT||Connector Audio Input|
|POWER||Connector Power supply|
|Output||Connector Audio Output|
|R1, R2, R3, R5||22k|
|R6||2.2 Ohms /1 Watt|
- The power supply for this circuit should be 12 to 45 volts / 2 amps
- Requires a heatsink and the power supply must be DC voltage. You can use notebook power supply
- Capacitor voltage
- Power supply < 18V = Capacitors 25V
- Power supply < 25V = Capacitors 35V
- Power supply < 40V = Capacitors 50V
- Power supply 40 at 45V = Capacitors 63V
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