TDA2030

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

13 of 13

www.unisonic.com.tw

QW-R107-004,D

SHORT CIRCUIT PROTECTION

The UTC TDA2030 has an original circuit which limits the current of the output transistors. This function can 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.

THERMAL SHUT-DOWN

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

supported since the Tj can not be higher than 150

°C

2).The heatsink can have a smaller factor of safety compared with that of a congenital circuit, There is no

possibility of device damage due to high junction temperature increase up to 150

°C, the thermal shut-down

simply reduces the power dissipation and the current consumption.

APPLICATION SUGGESTION

The recommended values of the components are those shown on application circuit of Fig.14. Different values can

be used. The following table can help the designer.

COMPONENT

RECOMMENDED

VALUE

PURPOSE

LARGER THAN

RECOMMENDED VALUE

SMALLER THAN

RECOMMENDED

VALUE

R1

22K

Ω

Closed loop gaon

setting.

Increase of Gain

Decrease of Gain

R2

680

Ω

Closed loop gaon

setting.

Decrease of Gain

Increase of Gain

R3

22K

Ω

Non inverting input

biasing

Increase of input impedance

Decrease of input

impedance

R4

1

Ω

Frequency stability

Danger of oscillation at high

frequencies with inductive

loads.

R5

≈3R2

Upper frequency cutoff

Poor high frequencies

attenuation

Danger of oscillation

C1

1

µF

Input DC decoupling

Increase of low

frequencies cutoff

C2

22

µF

Inverting DC

decoupling

Increase of low

frequencies cutoff

C3,C4

0.1

µF

Supply voltage bypass

Danger of oscillation

C5,C6

100

µF

Supply voltage bypass

Danger of oscillation

C7

0.22

µF

Frequency stability

Larger bandwidth

C8

≈1/(2π*B*R1)

Upper frequency cutoff smaller bandwidth

Larger bandwidth

D1,D2

1N4001

To protect the device

against output voltage

spikes.

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.