Application information

TDA2005

20/25

Doc ID 1451 Rev 6

Figure 33.

Bridge amplifier circuit suited for low-gain applications (GV = 34 dB)

Figure 34.

Example of muting circuit

4.1

Built-in protection systems

4.1.1

Load dump voltage surge

The TDA2005 has a circuit which enables it to withstand voltage pulse train, on Pin 9, of the

type shown in Figure 36. If the supply voltage peaks to more than 40 V, then an LC filter

must be inserted between the supply and pin 9, in order to assure that the pulses at pin 9

will be held within the limits shown.

A suggested LC network is shown in Figure 35. With this network, a train of pulses with

amplitude up to 120 V and width of 2 ms can be applied at point A. This type of protection is

ON when the supply voltage (pulse or DC) exceeds 18 V. For this reason the maximum

operating supply voltage is 18 V.