This circuit is a 2X12 watt Hi-Fi Power amplifier circuit using IC TDA 2616 from Phillips. This circuit very Simple and robust circuit using very less components makes the circuit ideal for a portable power amplifier. The circuit delivers 12 W power on 8 Ohm speaker for each channel at +/- 12 V dual supply.
- Capacitors except C10 & C9 are ceramic.
- Capacitors Electrolic must be rated 50V.
- Use a well regulated and filtered +/- 12 V dual power supply that is able to provide at least 2 A continuous current.
IC TDA2616 is a stereo power amplifier IC comes in a 9-lead single-in-line (SIL9) plastic power package (SOT131). This IC is specially designed for mains fed amplifier circuits, such as stereo radio,tape and television .The IC has good gain balance of both channels and Hi-fi in accordance with IEC 268 and DIN 45500 standards.
IC TDA 2616 DESCRIPTION
The TDA2616 is a hi-fi stereo amplifier designed for mains fed applications, such as stereo radio and TV. The circuit is optimally designed for symmetrical power supplies, but is also well-suited to asymmetrical power supply systems. An output power of 2 � 12 W (THD = 0.5%) can be
delivered into an 8 Wload with a symmetrical power supply of �16 V. The gain is internally fixed at 30 dB, thus offering a low gain spread and a very good gain balance between the two amplifiers (0.2 dB). A special feature is the input mute circuit. This circuit disconnects the non-inverting inputs when the supply voltage drops below �6 V, while the amplifier still retains its DC operating adjustment. The circuit features suppression of unwanted signals at the inputs, during switch-on and switch-off. The mute circuit can also be activated via pin 2. When a current of 300 mA is present at pin 2, the circuit is in the mute condition. The device is provided with two thermal protection circuits. One circuit measures the average temperature of the crystal and the other measures the momentary temperature of the power transistors. These control circuits attack at temperatures in excess of +150 �C, so a crystal operating temperature of max. +150 �C can be used without extra distortion.
delivered into an 8 Wload with a symmetrical power supply of �16 V. The gain is internally fixed at 30 dB, thus offering a low gain spread and a very good gain balance between the two amplifiers (0.2 dB). A special feature is the input mute circuit. This circuit disconnects the non-inverting inputs when the supply voltage drops below �6 V, while the amplifier still retains its DC operating adjustment. The circuit features suppression of unwanted signals at the inputs, during switch-on and switch-off. The mute circuit can also be activated via pin 2. When a current of 300 mA is present at pin 2, the circuit is in the mute condition. The device is provided with two thermal protection circuits. One circuit measures the average temperature of the crystal and the other measures the momentary temperature of the power transistors. These control circuits attack at temperatures in excess of +150 �C, so a crystal operating temperature of max. +150 �C can be used without extra distortion.
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