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Dual/Quad Power Amplifier - STA540

Dual/Quad Power Amplifier - STA540
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Description: 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. While our breakout board for the L298N isn't designed for it specifically, it will breakout out all pins of the STA540 to a more standard single row of 0.1" pitch headers. Also, keep an eye out for some upcoming amplifier products based on this chip!

It works great with the 6400BG Heatsink!


  • 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


SKU COM-09557
Stock On Backorder
Ships In 1 to 2 weeks.
Weight 0.43 oz
Price: $4.95
Qty Out of stock
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JST Jumper 4 Wire Assembly
Flex Sensor 2.2"
Jumper Wire - 0.1", 5-pin, 6"
EL Tape - Green (1M)
Resistor 10k Ohm 1/4 Watt
SparkFun Parts Box - Small (magnetic)
RFID Reader ID-12LA (125 kHz)
TSSOP-14 (0.65 mm pitch) Stainless Steel Stencil
LED Holder - 10mm
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