24 W BTL or 2 x 12 W stereo car radio power amplifier

The TDA1515BQ is a monolithic integrated class-B output amplifier in a 13-lead single in-line (SIL) plastic power package. The device is primarily developed for car radio applications, and also to drive low-impedance loads (down to 1,6?). At a supply voltage VP= 14,4 V, an output power of 24 W can be delivered into a 4?BTL (Bridge Tied Load), or, when used as stereo amplifier, it delivers 2×12 W into 2?or 2×7 W into 4?.

Special features are:

? flexibility in use?mono BTL as well as stereo

? high output power

? low offset voltage at the output (important for BTL)

? large usable gain variation

? very good ripple rejection

? internal limited bandwidth for high frequencies

? low stand-by current possibility (typ. 1 μA), to simplify required switches; TTL drive possible

? low number and small sized external components

? high reliability.

The following currently required protections are incorporated in the circuit. These protections also have positive influence on reliability in the applications.

? load dump protection

? a.c. and d.c. short-circuit safe to ground up to VP=18 V

? thermal protection

? speaker protection in bridge configuration

? SOAR protection

? outputs short-circuit safe to ground in BTL

? reverse polarity safe.