STA550

STA550 70+70W STEREO s POWER AMPLIFIER s s s s s s s s s MONOCHIP BRIDGE STEREO AMPLIFIER FOR BASH® ARCHITECTURE 55+55W OUTPUT POWER @ RL = 4/8 Ω, THD = 0.5% 70+70W OUTPUT POWER @ RL = 4/8 Ω, THD = 10% HIGH DYNAMIC PREAMPLIFIER INPUT STAGES EXTERNAL PROGRAMMABLE FEEDBACK TYPE COMPRESSORS AC COUPLED INPUT TO CLASS AB BRIDGE OUTPUT AMPLIFIER PRECISION RECTIFIERS TO DRIVE THE DIGITAL CONVERTER ON-OFF SEQUENCE/ TIMER WITH MUTE AND STANDBY PROPORTIONAL OVER POWER OUTPUT CURRENT TO LIMIT THE DIGITAL CONVERTER ABSOLUTE POWER BRIDGE OUTPUT FLEXIWATT27 s s s s s TRANSISTOR POWER PROTECTION ABSOLUTE OUTPUT CURRENT LIMIT INTEGRATED THERMAL PROTECTION POWER SUPPLY OVER VOLTAGE PROTECTION FLEXIWATT POWER PACKAGE WITH 27 PIN BASH® LICENCE REQUIRED DESCRIPTION The STA550 is a fully integrated power module designed to implement a BASH® amplifier when used in conjunction with STABP01 digital processor. BLOCK DIAGRAM +VS GND -VS OUT_ PRE1 TRK_1 PWR_INP1 + IN_PRE1 COMPRESSOR ∆G ABSOLUTE VALUE BLOCK CD+1 +2 OUT1+ -1 OUT1- OUTPUT BRIDGE ATT_REL1 V/l CD-1 CD+ PEAK/2 DETECTOR Ict VOLTAGE PROTECTION S1 SOA DETECTOR PROT. TRK_OUT THRESH THERMAL PROTECTION TURNON/OFF SEQUENCE Ict STBY/MUTE S1 PEAK/2 DETECTOR ATT_REL2 V/l CD+2 COMPRESSOR +2 ∆G + -1 ABSOLUTE VALUE BLOCK OUT2OUT2+ IN_PRE2 OUTPUT BRIDGE CD-2 OUT_ PRE2 TRK_2 PWR_INP2 D01AU1263 July 2003 1/16 STA550 DESCRIPTION (continued) Notice that normally only one Digital Converter is needed to supply a stereo or m...