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

Circuit Diagram

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Technical Documentation

Product Specifications
Description Version Size
DS3981 DS3981: 40 V, 3.5 A quad power half bridge 6.0 600 KB
Application Notes
Description Version Size
AN3340 AN3340: Loudspeaker characterization and compensation 1.3 3 MB
Support & Community

Sample & Buy

Part Number 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

Quality & Reliability

Part Number 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.