TEA2025A

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 8

www.unisonic.com.tw

QW-R107-012.C



APPLICATION INFORMATION(Cont.)

OUT

IN

R1

R1

R2

R2

R4

R3

OUT

Figure 2

Output Capacitors

The low cut off frequency due to output capacitor depending on the load is given by:

Pop Noise

(Figure 3)

Most amplifiers similar to UTC TEA2025A need external resistors between DC outputs and ground in order to

optimize the pop on/off performance and crossover distortion.

OUT

800

Figure 3

The UTC TEA2025A solution allows to save components because of such resistors (800 ohm) are included into

the chip.

Stability

A good layout is recommended in order to avoid oscillations. Generally the designer must pay attention on the

following points:

- Short wires of components and short connections.

- No ground loops.

- Bypass of supply voltage with capacitors as nearest as possible to the supply I. C. pin. The low value (poliester)

capacitors must have good temperature and frequency characteristics.

- No sockets.

The heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device

reduced.