A simple 100W TDA7294 amplifier
There are quite a few varieties of budget amplifiers, and this is one of them. The scheme is very simple and contains only one chip, several resistors and capacitors. Characteristics of the amplifier is quite serious, with such a small cost. Output power reaches 100 watts at maximum power. Absolutely clean output is 70 W.These amplifiers work well in pairs, so make these two and you will get a simple stereo amplifier.More detailed characteristics of the amplifier and switching circuits can be found in the datasheet on the TDA7294 microcircuit. It is advisable to choose a power supply for the amplifier one and a half times more powerful, so consider.
Characteristics of an amplifierMore detailed characteristics of an amplifier on a TDA7294:
- Bipolar power with a midpoint of 12 to 40 V.
- F o. - 20-20000 Hz
- R out. Max. (power supply + - 40V, Rн = 8 Ohms) - 100 W.
- R out. Max. (power supply + - 35V, Rн = 4 Ohms) - 100 W.
- To garm. (Pv = 0.7 P max) - 0.1%.
- Uin - 700 mV
Amplifier circuit for TDA7294
Amplifier PCBPicture arrangement of elements:
Power supplyThe power supply is full of the classic circuit with a transformer 150 watts. I recommend taking a ring-core transformer, as it is more powerful, smaller and emits a minimum of network interference and electromagnetic background of alternating voltage. Filtering capacitors for each arm 10,000 uF.
Date: 09.10.2018, 12:35 / Views: 55585
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