Low voltage operation, high sound quality quad BTL output power amplifier with st-by and mute inputs, clip and offset detection

The STPA001 is a breakthrough MOSFET technology class AB audio power amplifier designed for high power car radio. The fully complementary P-Channel/N-Channel output structure allows a rail to rail output voltage swing which, combined with high output current and minimized saturation losses sets new power references in the car-radio field, with unparalleled distortion performances.

The STPA001 can operate down to 6V and this makes the IC compliant to the most recent OEM specifications for low voltage operation (so called 'start-stop' battery profile during engine stop), helping car manufacturers to reduce the overall emissions and thus contributing to environment protection.

Key Features

  • Multipower BCD technology
  • High output power capability:
    • 4 x 50 W/4 Ω Max.
    • 4 x 28 W/4 Ω @ 14.4 V, 1 kHz, 10 %
    • 4 x 72 W/2 Ω Max.
  • MOSFET output power stage
  • 2 Ω driving capability
  • Hi-Fi class distortion
  • Low output noise
  • High immunity to RF noise injection
  • Standby function
  • Mute function
  • Automute at min. supply voltage detection
  • Low external component count
  • Internally fixed gain (26 dB)
  • Protections:
    • Output short circuit to GND, to Vs, across the load
    • Very inductive loads
    • Overrating chip temperature with soft thermal limiter
    • Output DC offset detection
    • Load dump
    • Fortuitous open GND
    • Reversed battery
    • ESD
    • Capable to operate down to 6 V (e.g. “Startstop”)


Technical Documentation

Product Specifications
Description Version Size
DS8990 DS8990: 4 x 50 W MOSFET quad bridge power amplifier 7.0 634 KB

Publications and Collaterals

Description Version Size
Car-audio power amplifiers 1.0 1 MB
Selection Guides
Description Version Size
Power amplifiers and voltage regulators 750 KB

Tools and Software

Evaluation Tools
Product Evaluation Tools
Support & Community

Sample & Buy

Part Number Marketing Status Quantity Unit Price (US$) * Package Packing Type ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STPA001A Active 1000 5.2 FLEXIWATT FM2 27 Tube NEC EAR99 CHINA MORE INFO No availability reported, please contact our Sales office
STPA001H Active 1000 5.72 FLEXIWATT 25 HB Tube NEC EAR99 CHINA MORE INFO No availability reported, please contact our Sales office
STPA001AH Active 1000 5.7 FLEXIWATT 27 HB Tube NEC EAR99 CHINA 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**
STPA001A ActiveFLEXIWATT FM2 27AutomotiveEcopack2
STPA001 ActiveFLEXIWATT FM2 25AutomotiveEcopack2
STPA001H ActiveFLEXIWATT 25 HBAutomotiveEcopack2
STPA001AH ActiveFLEXIWATT 27 HBAutomotiveEcopack2 0 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.