STA540

Overview

The STA540 is a four-channel, class-AB audio power amplifier designed for high-quality sound applications. It features single-ended outputs housed in a 15-pin Multiwatt ECOPACK package compliant with RoHS standards. The device provides high output power capability, including 2x 38 W into 4 Ω at 18 V and 4x 13 W into 2 Ω at 15 V, both measured at 1 kHz with 10% THD. It operates with internally fixed gain of 20 dB and requires no bootstrap capacitors or Boucherot cells. Standby functionality is CMOS compatible, ensuring no audible pop during transitions.

Feature Summary

• Integrated short-circuit protection against output to ground and supply, along with thermal shutdown warning and soft short-circuit check at turn-on.
• Diagnostic facilities include clip detection and output short-circuit monitoring for system reliability.
• Designed for minimal external component count by eliminating the need for bootstrap capacitors and Boucherot cells.

Applications

• High-quality automotive audio systems
• Multi-channel home theater setups
• Professional audio equipment requiring robust protection

Procurement Notes

Verify the specific ordering code matches the required package variant, as the STA540 utilizes a 15-pin Multiwatt ECOPACK Pb-free configuration. Confirm that the application voltage levels align with the specified performance data, such as 18 V for maximum dual-channel power. Ensure design compatibility with the internally fixed 20 dB gain and standby control logic requirements before finalizing procurement specifications.

Selection Notes

Select this component when a quad-channel solution is required without complex external biasing networks. It is suitable for designs needing integrated diagnostic feedback and robust protection mechanisms. Consider its power ratings relative to the load impedance and supply voltage to ensure operation within the specified thermal and electrical limits defined in the datasheet.

Part Context

STMicroelectronics offers a wide portfolio of class-AB audio amplifiers, including mono, stereo, and multichannel solutions. The STA540 represents their quad-channel offering, assembled in a Multiwatt15 package. This series supports both single-ended and BTL operating modes, catering to diverse high-fidelity audio requirements across various consumer and automotive sectors.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.