TDA2030A 데이터 시트보기 (PDF) - Unisonic Technologies

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TDA2030A

18W HI-FI AUDIO AMPLIFIER AND 35W DRIVER

Unisonic Technologies 

TDA2030A

LINEAR INTEGRATED CIRCUIT

„ POWER SUPPLY

Using monolithic audio amplifier with non regulated supply correctly. In any working case it must provide a supply

voltage less than the maximum value fixed by the IC breakdown voltage.

It is essential to take into account all the working conditions, in particular mains fluctuations and supply voltage

variations with and without load. The UTC TDA2030A(Vsmax=44V) is particularly suitable for substitution of the

standard IC power amplifiers(with Vsmax=36V) for more reliable applications.

An example, using a simple full-wave rectifier followed by a capacitor filter, is shown in the table and in the

diagram of Fig. 10.

A regulated supply is not usually used for the power output stages because of its dimensioning must be done

taking into account the power to supply in signal peaks. They are not only a small percentage of the total music

signal, with consequently large overdimensioning of the circuit.

Even if with a regulated supply higher output power can be obtained(Vs is constant in all working conditions),the

additional cost and power dissipation do not usually justify its use. using non-regulated supplies, there are fewer

designee restriction. In fact, when signal peaks are present, the capacitor filter acts as a flywheel supplying the

required energy.

In average conditions, the continuous power supplied is lower. The music power/continuous power ratio is greater

in case than for the case of regulated supplied, with space saving and cost reduction.

Fig. 10 DC characteristics of 50W non-regulated supply

36

34

Ripple

4

220V

32

2

VoUT

30

3300 F

Vout

0

28

0 0.4 0.8 1.2 1.6 2.0

IoUT(A)

Mains(220V)

+20%

+15%

+10%

-10%

-15%

-20%

Secondary Voltage

28.8V

27.6V

26.4V

24V

21.6V

20.4V

19.2V

Io=0

43.2V

41.4V

39.6V

36.2V

32.4V

30.6V

28.8V

DC Output Voltage(Vo)

Io=0.1A

42V

40.3V

38.5V

35V

31.5V

29.8V

28V

Io=1A

37.5V

35.8V

34.2V

31V

27.8V

26V

24.3V

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

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QW-R107-005,C

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