6/10

Figure 13. Maximum power

dissipation vs. supply voltage

(sine wave operation)

Figure 14. Maximum allowable

power dissipation vs. ambient

temperature

Figure 15. Typical values of

values of frequency reponse

(B)

Figure 16. Typical application

circuit

Figure 17. P.C. board and component layout for the circuit of

fig. 16 (1 : 1 scale)

APPLICATION INFORMATION

BUILT-IN PROTECTION SYSTEMS

Load dump voltage surge

The TDA 2003 has a circuit which enables it to

withstand a voltage pulse train, on pin 5, of the type

shown in fig. 19.

If the supply voltage peaks to more than 40V, then

an LC filter must be inserted between the supply

and pin 5, in order to assure that the pulses at pin

5 will be held within the limits shown in fig. 18.

A suggested LC network is shown in fig. 19. With

this network, a train of pulses with amplitude up to

120V and width of 2 ms can be applied at point A.

This type of protection is ON when the supply

voltage (pulsed or DC) exceeds 18V. For this reason

the maximum operating supply voltage is 18V.

TDA2003