ST Dual/Quad Power Amplifier - STA540

The STA540 from STMicro is a 4-channel, class AB audio amplifier designed for high quality sound applications. The four independent channels makes this amplifier a great choice for a number of projects, with needs ranging from four speakers stereo (F/R) to two-speaker bridge solutions. The chip accepts a voltage supply ranging from 8 to 22VDC and has very high output power capability.

This chip comes in a staggered-lead Multiwatt-15 package.

Features:

• High output power capability
• Standby function (CMOS compatible)
• Minimum external components count:
  
  • no bootstrap capacitors
  • no Boucherot cells
  • internally fixed gain 20 dB
• No audible pop during standby operations
• Diagnostic facilities:
  • clip detector
  • output to GND short-circuit detector
  • output to VS short-circuit detector
  • soft short-circuit check at turn-on
  • thermal shutdown warning
• Output AC/DC short circuit protection
• Soft short-circuit check at turn-on
• Thermal cutoff/limiter to prevent chip from overheating

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