TDA2003A

Application information

Doc ID 018796 Rev 4

13/19

Figure 22.

Voltage gain bridge configuration

Figure 23.

Suggested LC network circuit

3.1.2

Short-circuit (AC and DC conditions)

The TDA2003A can withstand a permanent short-circuit on the output for a supply voltage

up to 16 V.

3.1.3

Polarity inversion

High current (up to 5 A) can be handled by the device with no damage for a longer period

than the blow-out time of a quick 1 A fuse (normally connected in series with the supply).

This feature is added to avoid destruction if, during fitting to the car, a mistake on the

connection of the supply is made.

3.1.4

Open ground

When the radio is in the ON condition and the ground is accidentally opened, a standard

audio amplifier will be damaged. On the TDA2003A, protection diodes are included to avoid

any damage.

3.1.5

Inductive load

A protection diode is provided between pin 4 and 5 (see the internal schematic diagram) to

allow use of the TDA2003A with inductive loads. In particular, the TDA2003A can drive a

coupling transformer for audio modulation.

3.1.6

DC voltage

The maximum operating DC voltage on the TDA2003A is 18 V, however the device can

withstand a DC voltage up to 28 V with no damage. This could occur during winter if two

batteries were connected in series to crank the engine.