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TDA2003 Datasheet(PDF) 7 Page - STMicroelectronics |
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TDA2003 Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 10 page ![]() Short-circuit (AC and DC conditions) The TDA 2003 can withstand a permanent short- circuit on the output for a supply voltage up to 16V. Polarity inversion High current (up to 5A) can be handled by the device with no damage for a longer period than the blow-out time of a quick 1A fuse (normally con- nected 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. 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 TDA 2003 pro- tection diodes are included to avoid any damage. Inductive load A protection diode is provided between pin 4 and 5 (see the internal schematic diagram) to allow use of the TDA 2003 with inductive loads. In particular, the TDA 2003 can drive a coupling transformer for audio modulation. DC voltage The maximum operating DC voltage on the TDA 2003 is 18V. However the device can withstand a DC voltage up to 28V with no damage. This could occur during winter if two batteries were series connected to crank the engine. Thermal shut-down The presence of a thermal limiting circuit offers the following advantages: 1) an overload on the output (even if it is perma- nent), oran excessive ambient temperature can be easily withstood. 2) the heat-sink can have a smaller factor com- pared with that of a conventionalcircuit. There is no device damage in the case of ex- cessive junction temperature: all that happens is that Po (and therefore Ptot) and Id are reduced. Figure 20. Output power and dr a in cu r re n t vs . c ase temperature (RL =4 Ω) Figure 21. Output power and dr ai n cur re nt vs . c as e temperature (RL =2 Ω) Figure 18. Figure 19. 7/10 TDA2003 |
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