STMicroelectronics STA510FTR

Overview

STA510FTR from STMicroelectronics is a monolithic quad half-bridge power stage in Multipower BCD technology, designed as the output stage for FFX® all-digital Class-D audio amplifiers. It delivers 100 W + 100 W into 6 Ω stereo BTL loads at VCC = 36 V and THD = 10%, supports reconfiguration to single-BTL mode (200 W into 3 Ω), and features 150 mΩ RDS(on) complementary DMOS outputs with thermal warning and undervoltage protection.

For engineers reviewing the STA510FTR datasheet, STA510FTR pinout, STA510FTR application, or STA510FTR equivalent, this device is selected for high-efficiency audio output stages requiring precise deadtime control, CMOS-compatible logic inputs, thermal fault signaling, and flexible bridge configuration (quad half-bridge, dual full-bridge, or single high-current BTL).

Technical Context

The STA510FTR implements four independent half-bridge channels with matched P/N-channel DMOS outputs, each supporting up to 5.5 A continuous current and 44 V absolute max supply. Its input threshold scales with VL voltage (2.7–5 V), enabling compatibility with diverse logic families while maintaining low pulse-width distortion (25–40 ns min pulse width).

Thermal management is integrated via dedicated TH-WAR (130 °C warning) and thermal shutdown (150 °C) with 25 °C hysteresis, plus open-drain FAULT and TRI-STATE pins for system-level fault handling and Hi-Z safe state control. Configuration flexibility is achieved through the CONFIG pin, enabling binary-mode (OUT1A=OUT1B, OUT2A=OUT2B) operation when tied to VDD.

Key Specifications

Pinout & Package

Packaged in PowerSSO36 (slug-up) with exposed thermal pad for low 1–2.5 °C/W junction-to-case resistance, enabling high-power dissipation in compact audio amplifier designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad half-bridge audio output applications.

Compared with TAS5630PHDR and IRS2092SPBF, the STA510FTR uniquely integrates thermal warning, reconfigurable topology, and matched 150 mΩ DMOS in a single PowerSSO36 package-reducing total solution size by 60% and eliminating external thermal sensing components.

Availability

STA510FTR is available at Aetrix Electronics and suitable for home audio amplifiers, automotive infotainment systems, and professional PA equipment requiring stable component supply, long-lifecycle support, and production-ready thermal reliability.

Supply support for STA510FTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in analog, power, microcontrollers, and digital audio technologies for industrial, automotive, and consumer markets.

The STA510FTR belongs to ST's FFX® Class-D audio power stage family, engineered specifically for high-efficiency, low-EMI digital audio amplification with integrated protection and flexible bridge configuration.

FAQ

What is the recommended minimum output filter for STA510FTR in stereo BTL mode driving 6 Ω loads?

The datasheet specifies an optimized 6 Ω BTL filter using 15 µH inductors, 680 nF main capacitor, 100 nF damping capacitors, and 4.7 Ω damping resistor (Table 13). This configuration suppresses resonant peaks under no-load conditions-critical for production-line testing-and maintains THD+N <0.1% at 100 W output.

How does the CONFIG pin affect channel pairing and current capability?

When CONFIG is tied to VDD, OUT1A mirrors OUT1B and OUT2A mirrors OUT2B, effectively combining each pair into a single high-current half-bridge. This doubles per-channel current capability (to 11 A peak) and enables 200 W mono BTL operation into 3 Ω-verified at VCC = 36 V and THD = 10% in Figure 7.

Can STA510FTR operate safely without a speaker load connected?

Yes-but only with the optimized output filter (Table 13 or 14). The theoretical filter lacks sufficient differential-mode damping under no-load conditions, risking voltage overshoot beyond the 44 V absolute maximum rating. ST explicitly recommends the optimized filter for production test environments where speakers may be disconnected.

What is the purpose of the VL pin, and how should it be biased?

VL sets the reference for all logic input thresholds (VIN-High = VL/2 + 300 mV; VIN-Low = VL/2 – 300 mV). It must be connected to a stable 2.7–5 V supply-typically the same rail as the controlling DSP or PWM generator. No external filtering is required; VL directly configures input hysteresis and noise immunity.