STMicroelectronics STA550
The STA550 is a fully integrated power module designed to implement a BASH® amplifier when used in conjunction with STABP01 digital processor.| Part No. | STA550 |
|---|---|
| Datasheet | STA550 Download |
| Manufacturer |  STMicroelectronics |
| Description | 70 + 70W STEREO BASH POWER AMPLIFIER |
| Buy | Stock & Price |
DESCRIPTION
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 STA550DESCRIPTION
(continued) Notice that normally only one Digital Converter is needed to supply a stereo or multi-channel amplifier system, therefore most of the functions implemented in the circuit have summing outputs The signal circuits are biased by fixed negative and positive voltages referred to Ground. Instead the final stages of the output amplifiers are supplied by two external voltages that are following the audio signal . In this way the headroom for the output transistors is kept at minimum level to obtain a high efficiency power amplifier.
