DescriptionThe TDA2004A is a class B dual audio power amplifier in MULTIWATT package specifically designed for car radio applications, stereoamplifiers are
easily designed using this device that provides a high current capability (up to 3.5A) and that can drive very low impedance loads (down to 1.6W ).
- Low distortion
- Low noise
- High reliability of the chip and of the package with additional safety during operation thanks to protections against
- Space and cost saving
BUILT–IN PROTECTION SYSTEMS
Load dump voltage surge
The TDA2004 A has a circuit which enables it to with stand a voltage pulse train, on pin 9. 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. With this network,a train of pulse with amplitudeup to 120 V and with of 2 ms can be applied to point A. This type of protection is ON when the supply voltage (pulse orDC) exceeds18 V. For this reason the maximum operating supply voltage is 18 V.
High current (up to 10 A) can be handled by the device with no damage for a longer period than the blow-out time of a quick 2 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.
Open GroundWhen the ratio is the ON condition and the ground is accidentally opened, a standard audio amplifier will be damaged.On the TDA2004A protection diodes are included to avoid any damage.
A protection diode is provided to allow use of the TDA2004A with inductive loads.
DC VoltageThe maximum operating DC voltage on the TDA2004A is 18 V. However the device can withstand a DC voltage up to 28V with no damage.This could occur during winter if two batteries are series connectedo crank the engine.
Thermal Shut-DownThe presence of a thermal limiting circuit offers the following advantages :
- an overload on the output(even if it is permanent), or an excessive ambient temperature can be easily withstood
- the heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device damage in the case of excessive junction temperature ; all that happens is the PO (and therefore Ptot) and Id are reduced.