This part is a kind of semiconductor called TDA8510J.
Function of this product has 26 W BTL and 2 x 13 W SE power amplifiers.
Manufacturers : NXP
Image and pinout :

Some of the text within the PDF file :
INTEGRATED CIRCUITS DATA SHEET TDA8510J 26 W BTL and 2 × 13 W SE power amplifiers Preliminary specification Supersedes data of 1999 Jun 14 File under Integrated Circuits, IC01 1999 Dec 14 Philips Semiconductors Preliminary specification 26 W BTL and 2 × 13 W SE power amplifiers FEATURES • Requires very few external components • High output power • Low output offset voltage (BTL channel) • Fixed gain • Diagnostic facility (distortion, short-circuit and temperature detection) • Good ripple rejection • Mode select switch (operating, mute and standby) • AC and DC short-circuit safe to ground and to VP • Low power dissipation in any short-circuit condition • Thermally protected • Reverse polarity safe QUICK REFERENCE DATA SYMBOL General VP IORM Iq(tot) Istb BTL c [ ... ]
TDA8510J PDF Datasheet Download
