STMicroelectronics TDA75613LV

Overview

TDA75613LV from STMicroelectronics is a quad-channel Class SB automotive audio power amplifier in Flexiwatt27 (vertical) package, delivering 4 × 45 W max into 4 Ω at 14.4 V with 10% THD, full I²C diagnostics, SSR (Speaker Safety Routine), and operation down to 6 V for start-stop systems. It integrates MOSFET/DMOS output stage, independent short-circuit protection per channel, and selectable 30 dB / 16 dB gain for line-output noise optimization.

For engineers reviewing the TDA75613LV datasheet, TDA75613LV pinout, TDA75613LV application, or TDA75613LV equivalent, key selection criteria include low-voltage robustness (6–18 V), I²C-configurable diagnostics (DC/AC load detection, clipping threshold), thermal warning thresholds (125–160 °C), and SSR-enabled DC offset shutdown - all critical for OEM-grade car radio and infotainment amplifier design.

Technical Context

The TDA75613LV implements ST's patented Class SB architecture, combining high-efficiency switching control with linear output stages to reduce dissipation by >30% versus Class AB under typical audio program conditions. Its diagnostic engine performs turn-on, permanent, and AC load detection via dedicated I²C registers and analog monitoring pins (CD, SVR).

SSR executes real-time DC offset measurement at each speaker output during startup and normal operation; if >±2.5 V is detected, it forces mute and reports fault over I²C. The device supports dual operating modes: high-power amplifier mode (2–4 Ω loads) and low-noise line-driver mode (330 Ω open-load detection), configurable via I²C or hardware pins (CK/DATA/ADSEL).

Key Specifications

Pinout & Package

Package: Flexiwatt27 (vertical), thermally enhanced TO-220 variant with exposed metal tab (Pin 1) for direct heatsink mounting. R_{th j-case} = 1 °C/W enables high-power operation with minimal thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TDA75613LV, TDA75614 trades start-stop compatibility for higher output power, while MAX9768B sacrifices diagnostic depth and DC safety for superior noise performance and smaller footprint - making TDA75613LV the optimal choice for OEM-compliant, fault-resilient 6–18 V systems.

Availability

TDA75613LV is available at Aetrix Electronics and suitable for automotive infotainment head units, start-stop vehicle audio systems, and aftermarket DSP integration platforms requiring stable component supply, long-lifecycle support, and AEC-Q100-aligned reliability.

Supply support for TDA75613LV 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 broad manufacturing and qualification capabilities.

The TDA75613LV belongs to ST's TDA7xxx automotive audio amplifier family, engineered specifically for OEM-grade car radios demanding integrated diagnostics, low-voltage resilience, and speaker-level safety - not generic audio amplification.

FAQ

What is the minimum supply voltage for full 4×45 W output?

The TDA75613LV delivers its rated 4×45 W maximum output only at ≥14.4 V supply. At 6 V (start-stop condition), it sustains 4×5 W into 4 Ω with 10% THD. Full power requires VS ≥13.5 V per ST's electrical characteristics table (PO = 45 W at Vs = 15.2 V, RL = 4 Ω, THD = 10%).

How does SSR interact with I²C diagnostics during startup?

SSR performs autonomous DC offset measurement at each output prior to enabling playback; if >±2.5 V is detected, it forces immediate mute and sets I²C register bits (DB1[7:0]) indicating channel-specific fault. This occurs before any I²C command execution, ensuring hardware-level safety independent of firmware.

Can the TDA75613LV drive 2 Ω loads continuously?

Yes - it supports 2 Ω loads up to 64 W max per channel (at 14.4 V, 10% THD), with built-in current limiting and thermal foldback. However, continuous 2 Ω operation requires strict thermal management: R_{th j-case} ≤1 °C/W and case temperature maintained below 70 °C per absolute maximum ratings.

Is I²C communication required to use basic amplifier functions?

No - all core functions (standby/mute, gain selection, clipping detection) operate via hardware pins (STBY, CK, DATA, CD). I²C is optional and used only for advanced diagnostics, fault logging, and fine-grained configuration (e.g., custom thermal thresholds, AC load sensitivity).