STPA008-4WX

Overview

The STPA008-4WX is a Class-AB MOSFET quad bridge power amplifier designed for automotive audio applications. It delivers up to 50 W per channel into 4 Ω loads and supports 2 Ω driving capability. The device operates from a supply voltage range of 6 V to 18 V, ensuring compatibility with start-stop systems. Key electrical parameters include an internal fixed gain of 26 dB and operation within a temperature range of -40 °C to +105 °C. It features rail-to-rail output swing and meets AEC-Q100 automotive qualification standards.

Feature Summary

• Fully complementary P-Channel/N-Channel MOSFET output structure enabling rail-to-rail voltage swing
• High immunity to GSM noise injection and RF interference, reducing external component requirements
• Integrated protection mechanisms including thermal limiting, DC offset detection, and load dump handling
• Automotive-grade reliability compliant with AEC-Q100 standards for harsh environment operation

Applications

• High-power car radio systems requiring multi-channel audio amplification
• Vehicles equipped with start-stop engine technology operating at low voltages
• Hybrid vehicle audio architectures demanding robust power delivery
• Automotive infotainment clusters needing high sound quality with minimal distortion

Procurement Notes

Verify the specific suffix (e.g., 4WX) against the manufacturer's current datasheet to confirm package type and pinout configuration. Ensure the procurement source provides valid AEC-Q100 certification documentation. Confirm that the ordering part number matches the required Flexiwatt-V-25 or Flexiwatt-25 package variant specified in the design schematic. Cross-reference the RoHS compliance status with the latest ECOPACK2 environmental declarations.

Selection Notes

Select this component when designing automotive audio systems requiring high output power without digital signal processing interfaces. It is suitable for applications where analog input is preferred over digital DSP connections. Consider its ability to drive low impedance loads if speaker configurations demand high current. Evaluate the thermal management requirements based on the 50 W per channel output capability and the chosen enclosure type.

Part Context

The STPA008 belongs to STMicroelectronics' specialized portfolio of intelligent analog automotive power amplifiers. This series focuses on delivering Hi-Fi class distortion performance while maintaining high efficiency compared to standard designs. The product line addresses the evolving needs of modern vehicles, particularly those integrating hybrid engines and advanced connectivity features that introduce electromagnetic interference challenges.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the official STMicroelectronics replacement guide or contact technical support for qualified alternatives. Verify compatibility with existing PCB footprints and thermal dissipation constraints before considering any cross-referenced components.