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4 x 13 W dual/quad power amplifier
  • active Active

The STA540 is a 4-channel, class-AB audio amplifier designed for high quality sound applications.

The amplifiers have single-ended outputs with integrated short-circuit protection, thermal protection and diagnostic functions.

The chip is housed in the 15-pin Multiwatt ECOPACK®Pb-free package which is RoHS (2002/95/EC) compliant.

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Errata Sheet
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Key Features

  • High output power capability
  • 2x 38 W into 4 Ω at 18 V, 1 kHz, 10% THD
  • 2x 34 W into 8 Ω at 22 V, 1 kHz, 10% THD
  • 2x 24W into 4Ω at 14.4 V, 1 kHz, 10% THD
  • 2x 15 W into 8 Ω at 16 V, 1 kHz, 10% THD
  • 4x 13 W into 2 Ω at 15 V, 1 kHz, 10% THD
  • 4x 11 W into 4 Ω at 18 V, 1 kHz, 10% THD
  • 4x 7 W into 4 Ω at 14.4 V, 1 kHz, 10% THD
  • Minimum external components count:
  • no bootstrap capacitors
  • no Boucherot cells
  • internally fixed gain 20 dB
  • Standby function (CMOS compatible)
  • 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
  • Protection
  • Output AC/DC short circuit
  • Soft short-circuit check at turn-on
  • Thermal cutoff/limiter to prevent chip from overheating
  • High inductive loads
  • ESD

Circuit Diagram

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS5467: 4 x 13 W dual/quad power amplifier
6.0 338 KB

Related Tools and Software

Related Tools and Software

Part Number Description
STSW-AUDIO001 SW Demos-Audio Power Amplifiers, Class AB <5V-TS4956

Sample & Buy

Part Number Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STA540ActiveMW 15LTube_Free Samples2.13Distributor reported inventory date: 2016-02-09
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA1166500

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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