STMicroelectronics E-TDA7375V

Overview

E-TDA7375V from STMicroelectronics is a Class AB quad-channel car radio audio power amplifier supporting dual-bridge (2×40W @4Ω) or quad single-ended (4×12W @2Ω) operation at 14.4V, with internally fixed 26dB BTL gain, CMOS-compatible ST-BY control (pin 7), and integrated diagnostics for clipping, output shorts, and thermal proximity. It targets automotive head unit amplification with pop-free turn-on/standby and rail-to-rail output swing.

For engineers reviewing the E-TDA7375V datasheet, E-TDA7375V pinout, E-TDA7375V application, or E-TDA7375V equivalent, key selection criteria include bridge vs. SE configuration flexibility, built-in short-circuit protection behavior, ST-BY current limits (≤5mA into pin 7), diagnostic signal timing discrimination at pin 10, and MULTIWATT15 vertical package thermal resistance (1.8°C/W).

Technical Context

The TDA7375V implements a fully complementary output stage using ST's proprietary ICV PNP transistors, enabling rail-to-rail swing without bootstrap capacitors and intrinsic stability without external Boucherot cells. Its loop gain is controlled via local feedback to ensure unity-gain stability margin despite low closed-loop gain.

Diagnostics are consolidated on open-collector pin 10, where sinking current indicates clipping (short pulses), output fault (longer pulses), or thermal shutdown proximity (~10°C before trip). Standby activation requires RC filtering on pin 7 with ≤5mA drive capability and ≥100nF capacitor to S-GND for muting timing control.

Key Specifications

Pinout & Package

The E-TDA7375V uses the MULTIWATT15 vertical package (15-pin, staggered row, metal tab for thermal interface), with 2.65mm pitch, 22.2mm length, and 19.9mm height. Thermal resistance is 1.8°C/W junction-to-case, requiring mechanical mounting to heatsink via the exposed metal tab.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDA7377 and TPA5052, the E-TDA7375V uniquely combines Class AB linearity, integrated diagnostics on one pin, and bridge/SE reconfigurability without component changes - making it optimal for serviceable, mid-power automotive audio where fault visibility and layout simplicity are critical.

Availability

E-TDA7375V is available at Aetrix Electronics and suitable for automotive head unit manufacturing, rear-seat entertainment systems, service diagnostic tools, and aftermarket speaker protection modules requiring stable component supply and long-term lifecycle support.

Supply support for E-TDA7375V 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, designing and manufacturing analog, microcontroller, power, and automotive ICs with ISO/TS 16949-certified processes.

The TDA7375V belongs to ST's automotive audio amplifier product line, engineered specifically for cost-optimized, diagnostics-enabled car radio systems requiring robust short-circuit protection and flexible channel configuration without external gain-setting components.

FAQ

What is the maximum safe supply voltage for continuous operation?

The E-TDA7375V has an absolute maximum DC supply voltage (VS) of 28V, but continuous operation must remain within the operating range of 8–18V. Exceeding 18V risks exceeding thermal limits even with adequate heatsinking, and sustained operation above this threshold voids reliability guarantees per ST's datasheet Section 2.

How does the diagnostic pin (pin 10) differentiate clipping from thermal events?

Pin 10 sinks current in all fault conditions, but pulse width distinguishes them: clipping produces narrow pulses (<100μs), while output shorts or thermal proximity generate longer pulses (>5ms). The recommended interface circuit (Fig. 29 in datasheet) uses RC timing to separate these durations for microcontroller GPIO interpretation.

Can the E-TDA7375V drive 2Ω loads in bridge mode?

No - bridge-mode operation is specified only for 4Ω minimum loads per channel. Driving 2Ω in bridge exceeds safe SOA limits and triggers thermal limiting or shutdown. However, quad single-ended mode supports 2Ω loads at 4×12W, verified in Table 4 under "Single Ended, RL = 2Ω" test condition.

Why is separate P-GND and S-GND routing mandatory?

The IC integrates distinct power and signal ground paths internally. Mixing them on PCB causes ground bounce, degrading PSRR (50dB typ.) and increasing crosstalk (60dB min. at 10kHz). Layout Rule 5.9 requires star-grounding at the main electrolytic capacitor's negative terminal, with dedicated low-impedance traces for each ground type.