STMicroelectronics E-TDA7375AV

Overview

E-TDA7375AV from STMicroelectronics is a Class AB dual/quad automotive audio power amplifier in Multiwatt15 package, delivering 2 × 37 W into 4 Ω (EIAJ) or 4 × 12 W into 2 Ω at 14.4 V, with fixed 26 dB BTL gain and integrated diagnostics for clipping, short-circuit, and thermal proximity-designed for car radio front/rear speaker drive and bridge-tied load subwoofer applications.

For engineers reviewing the E-TDA7375AV datasheet, E-TDA7375AV pinout, E-TDA7375AV application, or E-TDA7375AV equivalent, key selection criteria include output configuration flexibility (dual BTL or quad SE), CMOS-compatible standby control, rail-to-rail output swing without bootstrap capacitors, and open-collector diagnostic signaling on Pin 10 for system-level fault detection.

Technical Context

The TDA7375AV implements a fully complementary output stage using ST's proprietary ICV PNP transistors, enabling rail-to-rail voltage swing and eliminating need for bootstrap capacitors or Boucherot cells. Its internally fixed gain (20 dB SE / 26 dB BTL) and dedicated CMOS-compatible standby pin (Pin 7) ensure pop-free turn-on/off and <100 µA standby current.

Diagnostics are consolidated on Pin 10 as an open-collector current sink: distinct pulse widths differentiate clipping (short pulses), output shorts to GND/VS (medium pulses), and thermal shutdown proximity (longer sustained sink). The device supports four independent configurations-quad single-ended, dual bridge, stereo + bridge, or 2-channel BTL-with no external gain-setting components required.

Key Specifications

Pinout & Package

Package: Multiwatt15 vertical, thermally enhanced plastic package with exposed metal tab for direct heatsinking; RoHS-compliant ECOPACK® grade.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual/quad automotive audio amplifier applications.

Compared with TDA7377 and TPA5560-Q1, the E-TDA7375AV uniquely combines Class AB linearity, hardware-configurable topology (SE/BTL), and single-pin diagnostics - making it optimal for cost-sensitive, reliability-focused car radio platforms requiring zero external gain components and factory testability.

Availability

E-TDA7375AV is available at Aetrix Electronics and suitable for automotive infotainment systems, OEM head unit replacements, and aftermarket car audio modules requiring stable component supply, long-lifecycle availability, and AEC-Q100-aligned thermal robustness.

Supply support for E-TDA7375AV 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, specializing in automotive, industrial, and power management ICs with strong IP in analog and mixed-signal design.

The TDA7375AV belongs to ST's automotive audio amplifier product line, engineered specifically for cost-optimized, high-reliability car radio applications where thermal stability, diagnostic readiness, and minimal external component count are mandatory.

FAQ

What is the maximum supply voltage the E-TDA7375AV can withstand during load dump events?

The E-TDA7375AV sustains 40 V peak supply voltage for up to 50 ms per ISO 7637-2 Pulse 5a, enabling direct connection to vehicle battery without external TVS diodes in most implementations. This rating is validated under transient conditions with junction temperature below 150 °C and applies only to non-repetitive events.

How does the diagnostic pin (Pin 10) distinguish between clipping and thermal shutdown events?

Pin 10 uses pulse-width encoding: clipping triggers brief current-sink pulses (~1–5 ms), output shorts produce medium-duration pulses (~10–50 ms), and thermal proximity initiates sustained sinking (>100 ms) starting ~10 °C before shutdown. External microcontroller firmware decodes these durations using a single GPIO interrupt and timer capture.

Can the E-TDA7375AV operate in both dual bridge and quad single-ended modes simultaneously?

Yes - Channels 1 & 2 can be configured as one BTL pair (Pins 1–2), while Channels 3 & 4 operate as independent SE outputs (Pins 8–9 and Pins 11–12), enabling hybrid topologies like front stereo + rear mono subwoofer. Input pin strapping (e.g., shorting INx+ to INx−) determines per-channel mode without software intervention.

Is an external heat sink required for continuous 2 × 37 W operation into 4 Ω?

No - with R_{th j-case} = 1.8 °C/W and proper PCB copper pour (≥10 cm² 2-oz copper connected to Pin 15 tab), the E-TDA7375AV achieves thermal equilibrium at ≤85 °C case temperature under full 37 W/channel load at 25 °C ambient. Forced air is unnecessary unless ambient exceeds 70 °C.