40 V, 3.5 A quad power half-bridge digital audio amplifier

The STA518 is a monolithic quad half-bridge stage in multipower BCD technology. The device can be used also as dual bridge or reconfigured, by connecting the CONFIG pin to the Vddpin, as a single bridge with double current capacity.

The device is particularly designed to make the output stage of a stereo all-digital high-efficiency (DDX™) amplifier capable of delivering an output power of 24 W x 4 channels @ THD = 10% at VCC30 V into a 4 Ω load in single-ended configuration.

It can also deliver 50 + 50 W @ THD = 10% at VCC29 V as output power into an 8 Ω load in BTL configuration and 70 W @ THD = 10% at VCC34 V into 8 Ω in a single paralleled BTL configuration.

The input pins have a threshold proportional to the VLpin voltage.

Key Features

  • Multipower BCD technology
  • Minimum input output pulse width distortion
  • 200 mΩ RdsON complementary DMOS output stage
  • CMOS-compatible logic inputs
  • Thermal protection
  • Thermal warning output
  • Undervoltage protection
  • Short-circuit protection


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Description Version Size
DS3981 DS3981: 40 V, 3.5 A quad power half bridge 6.0 600 KB
Description Version Size
AN3340 AN3340: Loudspeaker characterization and compensation 1.3 3 MB


型号 Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STA51813TR PowerSSO 36 Tape And Reel -40 90 Active 2.485 1000 NEC EAR99 MALAYSIA MORE INFO No availability reported, please contact our Sales office

(*) 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


型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STA51813TR ActivePowerSSO 36IndustrialEcopack2 0

(**) The Material Declaration forms available on st.com 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.