STA501A

Overview

The STA501A is a monolithic dual half-bridge output stage built on Multipower BCD technology, designed for mono All-Digital High Efficiency (DDX) amplifiers. It delivers 50W at THD=10% into an 8Ω load with a 30V supply. Key electrical parameters include a 45V maximum DC supply voltage, 200mΩ typical RdsON for complementary DMOS outputs, and a 3.5A short-circuit current limit. The device features CMOS-compatible logic inputs with thresholds proportional to the VL pin voltage, operating within a 0 to 70°C temperature range.

Feature Summary

• Complementary DMOS output stage with low on-resistance
• Integrated thermal protection and warning output
• Under-voltage protection circuitry
• CMOS compatible logic inputs

Applications

• Output stage for mono All-Digital High Efficiency (DDX) amplifiers
• Audio power amplifier systems requiring high efficiency
• Dual half-bridge driver applications in consumer electronics

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors due to obsolete status. Confirm package integrity for PowerSO36 SLUG UP configuration. Check revision history for any specific manufacturing lot variations. Ensure compatibility with existing DDX amplifier designs before integration. Validate supply chain sources for genuine parts only.

Selection Notes

Select this component for designs requiring a robust dual half-bridge solution with integrated protections. Consider the 45V absolute maximum rating and 30V typical operating voltage when designing power supplies. Evaluate thermal management requirements given the junction-to-case resistance. Ensure input logic levels match the VL pin voltage specifications for proper switching behavior.

Part Context

The STA501A belongs to STMicroelectronics' Multipower BCD technology family, specifically engineered for audio power applications. It serves as a dedicated output stage driver, replacing discrete MOSFET solutions with a monolithic integrated approach. This design simplifies PCB layout while providing enhanced reliability through built-in fault detection mechanisms like thermal warning and under-voltage lockout.

Replacement Considerations

This product is listed as obsolete. No direct public substitute part numbers are confirmed in the datasheet. Designers should consult STMicroelectronics for current equivalent recommendations or alternative components suitable for DDX amplifier output stages.