This power stereo amplifier works with dual polarity / symmetrical power supply. Since based to the datasheet, the negative supply range is only -22V max, then you may use +/- 20V up to +/-22V supply. Don’t forget to mount a heatsink on the power IC STA550 to prevent overheating.  With the features of this IC is owned, produced the audio output will not disappoint.

About STA550:
The STA550 is a fully integrated power module designed to implement a BASH® amplifier when used in conjunction with STABP01 digital processor.

Features:

• Monochip bridge stereo amplifier for bash® architecture
• 55+55w output power @ rl = 4/8Ω, thd = 0.5%
• 70+70w output power @ rl = 4/8Ω, 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 transistor power protection
• Absolute output current limit
• Integrated thermal protection
• Power supply over voltage protection
• Flexiwatt power package with 27 pin

Download STA550 Datasheet for 70W power stereo amplifier circuit reference.
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