STA508

Overview

The STA508 is a monolithic quad half-bridge output stage manufactured in Multipower BCD technology. It is designed for stereo All-Digital High Efficiency (DDX) amplifiers, delivering 80W per channel at 10% THD with an 8Ω load and 35V supply. In single BTL configuration, it provides a peak of 160W at 10% THD with a 4Ω load and 35V supply. The device features complementary DMOS outputs with 200mΩ Rds(on), under-voltage protection, thermal warning, and thermal protection. Input thresholds are proportional to the VL pin voltage, and logic inputs are CMOS compatible.

Feature Summary

• Monolithic quad half-bridge architecture utilizing Multipower BCD technology for high efficiency and integration.
• Complementary DMOS output stage with low on-resistance to minimize distortion and maximize power delivery.
• Configurable operation modes including dual bridge, single bridge with double current, and half bridge via CONFIG pin.
• Integrated protection mechanisms including under-voltage protection, thermal warning output, and thermal shutdown.

Applications

• Stereo All-Digital High Efficiency (DDX) amplifier output stages
• High-power audio systems requiring configurable bridge-tied-load configurations
• Professional audio equipment needing robust thermal and electrical protection

Procurement Notes

Verify the specific package type and tape/reel specifications against the manufacturer's official datasheet before ordering. Ensure that the design environment supports the required voltage levels and thermal management capabilities associated with the Multipower BCD technology. Confirm compatibility with digital amplifier architectures requiring input thresholds proportional to supply voltage.

Selection Notes

Select the STA508 when designing high-power digital audio amplifiers requiring flexible bridge configurations. Its ability to operate as a dual bridge, single bridge with doubled current, or half bridge allows for versatile system design. The integrated protections simplify thermal management and enhance reliability in demanding audio applications.

Part Context

The STA508 belongs to STMicroelectronics' portfolio of power output stages designed for digital audio applications. It leverages Multipower BCD technology to combine high-voltage DMOS performance with control logic integration. This component addresses the need for efficient, high-power audio solutions with built-in safety features and configurable topology support.

Replacement Considerations

No publicly confirmed substitute part numbers are available in the provided documentation. Designers should consult STMicroelectronics technical support for potential alternatives if this component is discontinued or unavailable.

FAQ

How does the STA508 handle different bridge configurations?

The device can be reconfigured by connecting the CONFIG pin to Vdd. This allows it to operate as a single bridge with double current capability or as a half bridge (Binary mode) with half current capability, in addition to its standard dual bridge operation.

What protection features are included in the STA508?

The STA508 includes under-voltage protection, a thermal warning output, and thermal protection to safeguard the device during operation in harsh environments or under fault conditions.