STMicroelectronics STA510F

Overview

STA510F from STMicroelectronics is a monolithic quad power half-bridge driver 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), thermal warning output, and undervoltage protection.

For engineers reviewing the STA510F datasheet, STA510F pinout, STA510F application, or STA510F equivalent, key selection considerations include its 44 V absolute max supply, 5.5 A overcurrent threshold, CONFIG-pin reconfigurability between quad/dual/single-BTL modes, and compatibility with FFX® controller ICs such as STA311B.

Technical Context

The STA510F integrates four independent half-bridge stages with complementary DMOS outputs, each controlled by CMOS-compatible logic inputs referenced to VL voltage. Its input threshold scales with VL (e.g., VIN-H = VL/2 + 300 mV), enabling flexible interface with 2.7–5 V logic systems.

It implements dynamic deadtime control (50 ns typ. at 4.5 A), thermal shutdown at 150 °C with 25 °C hysteresis, and open-drain FAULT/TH-WAR outputs with defined logic thresholds. The CONFIG pin enables hardware-selectable topology: quad half-bridge, dual full-bridge, or single high-current BTL via internal output pairing.

Key Specifications

Pinout & Package

Packaged in PowerSSO36 (slug-up) with exposed thermal pad for high-power dissipation; 36-pin surface-mount package optimized for audio amplifier PCB layouts requiring low-inductance power paths and thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TAS5381A and IRS2092S, the STA510F uniquely combines 44 V operation, hardware-configurable topology, VL-referenced logic, and dual thermal signaling - making it optimal for FFX®-based digital audio systems requiring design flexibility and thermal intelligence.

Availability

STA510F is available at Aetrix Electronics and suitable for home audio amplifiers, automotive infotainment systems, and professional PA modules requiring stable component supply, long-lifecycle support, and production-ready thermal performance.

Supply support for STA510F 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 power management, analog, microcontrollers, and automotive ICs.

The STA510F belongs to ST's FFX® Class-D audio driver family, engineered specifically to serve as the high-efficiency, high-fidelity output stage for digital audio amplifiers targeting consumer, automotive, and professional markets.

FAQ

What is the purpose of the CONFIG pin on the STA510F?

The CONFIG pin selects operational topology: when left unconnected, the device operates as quad half-bridge; when tied to VDD (pins 21/22), it pairs OUT1A/OUT1B and OUT2A/OUT2B to form two high-current full-bridges - enabling single-BTL mode delivering 200 W into 3 Ω. This hardware reconfiguration eliminates need for external logic or firmware changes.

How does the thermal warning (TH-WAR) output differ from the FAULT output?

TH-WAR is an open-drain advisory signal that goes low at 130 °C junction temperature, allowing system-level thermal derating before shutdown. FAULT is also open-drain but asserts at 150 °C (thermal shutdown) or during overcurrent/UVLO events. Both require external pull-up resistors; TH-WAR provides early warning, while FAULT indicates immediate fault condition requiring action.

Can the STA510F be used with logic supplies other than 3.3 V?

Yes - input thresholds scale with VL voltage: VIN-H = VL/2 + 300 mV and VIN-L = VL/2 – 300 mV. Supported VL range is 2.7–5 V, confirmed by Table 7 (e.g., at VL = 2.7 V, thresholds are 0.7 V / 1.5 V). This allows direct interface with 2.7 V, 3.3 V, or 5 V controllers without level shifters.

What is the significance of the PSSO36 (slug-up) package for thermal performance?

The PSSO36 package features an exposed thermal pad on the underside ("slug-up") that must be soldered to a large copper pour on the PCB. With R_θJC as low as 1 °C/W, this construction enables efficient heat transfer from the die to the board, sustaining 5.5 A continuous output per half-bridge without external heatsinks - critical for compact, fanless audio amplifier designs.