UZCH based on the A2030 chip (2x180 W). Scheme, description

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UZCH on the A2030 chip (2x180 watts). Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Transistor power amplifiers

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The A2030 chip, in my opinion, is the best integrated power amplifier currently available. It is far ahead of other integrated amplifiers on the market in such important indicators as output power and harmonics. The proposed stereo UCH based on the A2030 has a low harmonic coefficient and high output power.

UZCH parameters

Output power, W
- at Рн=4 Ohm 2х180
- at Rн=8 Ohm 2х90
Harmonic coefficient,% no more than 1
Supply voltage, V ± 22

(click to enlarge)

A preamplifier, tone, volume and balance controls are assembled on the DA1 chip. Resistors R1 and R2 are used to adjust the volume and balance, respectively, and R3 and R4 are used to adjust the tone. Next, the AF signal goes to the DA3, DA4 microcircuits, which "rock" the transistors VT1 ... VT4. They should be installed on heat sinks. Diodes VD1...VD4 can be any medium power. The received high power AF signal is fed to the load VA1 (VA2). The loudspeaker power must be at least 200 watts at 4 ohms and at least 100 watts at 8 ohms.

This UZCH can be used in discos, for scoring large areas or halls.

Author: S. Sych; Publication: cxem.net

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