STMicroelectronics TDA7376PD

Overview

TDA7376PD from STMicroelectronics is a dual-channel Class-AB bridge-tied-load (BTL) audio power amplifier in PowerSO36 package, designed for automotive radio main amplification. It delivers 2 × 35 W into 4 Ω at 14.4 V/1 kHz/10% THD (EIAJ), supports 2 Ω loads, features differential inputs, fixed 26 dB gain, and integrated clipping detection with programmable THD threshold.

For engineers reviewing the TDA7376PD datasheet, TDA7376PD pinout, TDA7376PD application, or TDA7376PD equivalent, key selection criteria include rail-to-rail output swing without bootstrap capacitors, CMOS-compatible mute/standby control, soft thermal limiting, short-circuit protection across load/supply/ground, and distortion detection via open-collector CD-OUT pin.

Technical Context

The device employs a fully complementary PNP/NPN output stage enabling true rail-to-rail voltage swing and eliminating external bootstrap components. Its differential input pairs accept both single-ended and differential signals, delivering ≥60 dB common-mode rejection ratio and ≥80 dB crosstalk suppression at 1 kHz.

Internal protections include short-circuit detection (out-to-ground, out-to-VCC, across load), overtemperature limiting with thermal foldback, load-dump tolerance up to 50 V peak, fortuitous open-ground immunity, loudspeaker DC current blocking, and ESD protection. The programmable clipping detector uses an external resistor divider on THDSET to set distortion threshold from 3.5% to >10% THD.

Key Specifications

Pinout & Package

Package: PowerSO36 (slug-up), thermally enhanced exposed die pad for direct heatsink mounting; R_{th j-case} = 2 °C/W max.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDA7377B and TPA5560DAP, the TDA7376PD offers optimal balance of analog fidelity, integrated protection, and design simplicity for cost-sensitive car radio platforms-delivering verified 35 W/channel without external bootstrap or filtering components.

Availability

TDA7376PD is available at Aetrix Electronics and suitable for automotive infotainment systems, OEM radio replacements, and aftermarket audio boosters requiring stable component supply, long-lifecycle support, and AEC-Q100-aligned manufacturing traceability.

Supply support for TDA7376PD 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 automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 qualified processes.

The TDA7376PD belongs to ST's automotive audio amplifier product line, engineered specifically for cost-effective, thermally robust, and noise-immune analog amplification in space-constrained car radio designs.

FAQ

What is the minimum supply voltage required for functional operation of the TDA7376PD?

The TDA7376PD operates down to 8 V DC supply voltage, with automute activation below this threshold to prevent distorted output during cold-crank conditions. Full-rated output power (35 W/channel) is guaranteed at 14.4 V, and the device withstands transient peaks up to 50 V for 50 ms without damage.

How does the THDSET pin configure the clipping detection threshold?

The THDSET pin accepts a DC voltage (0.5–2.5 V) generated by an external resistor divider from VCC; Figure 3 in the datasheet maps this voltage to a corresponding THD threshold (e.g., 1.0 V ≈ 5.5% THD). The CD-OUT pin sinks current when instantaneous output distortion exceeds that preset level.

Can the TDA7376PD drive 2 Ω speakers reliably, and what thermal considerations apply?

Yes-the device is rated for 2 × 25 W into 2 Ω at 14.4 V/1 kHz/10% THD and includes a soft thermal limiter that progressively reduces output current above 140 °C junction temperature. PCB copper area under the TAB must exceed 400 mm² with 2 oz copper for sustained 2 Ω operation.

What is the purpose of separating PWGND and SGND pins, and how should they be routed?

PWGND pins carry high-current return paths from output stages (up to 6 A peak), while SGND provides a quiet reference for input and bias circuitry. They must connect to a single-point star ground on the PCB, with PWGND tied to the thermal pad and SGND routed away from power traces to prevent noise coupling into differential inputs.