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Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

STMicroelectronics TDA7577BLVSMTR

Name: TDA7577BLVSMTR
Brand: STMicroelectronics
SKU: TDA7577BLVSMTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7577BLVSMTR

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 27-Flexiwatt, Formed Leads

Datasheet:: TDA7577BLVSMTR.pdf

Description:: ABD AUDIO & POWER

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TDA7577BLVSMTR from STMicroelectronics is a dual-bridge Class SB MOSFET audio power amplifier designed for automotive head units, delivering 2 × 75 W into 2 Ω loads and supporting 6 V "start-stop" operation. It integrates full I²C diagnostics with four selectable addresses, differential inputs, and dual independent short-circuit protection. Its 1 Ω single-channel capability (84 W undistorted) and 26 dB gain make it suitable for high-fidelity car radio output stages.

For engineers reviewing the TDA7577BLVSMTR datasheet, TDA7577BLVSMTR pinout, TDA7577BLVSMTR application, or TDA7577BLVSMTR equivalent, key selection criteria include low-voltage start-stop compatibility (6–18 V), integrated DC/AC fault detection, I²C-configurable clipping thresholds (2 % / 10 %), and Flexiwatt27 (SMD) thermal performance with R_th(j-case) = 1 °C/W.

Technical Context

The TDA7577BLVSMTR implements a proprietary high-efficiency Class SB architecture that reduces power dissipation by up to 50 % versus conventional Class AB amplifiers. Its DMOS output stage enables stable operation down to 6 V supply while maintaining THD ≤ 0.085 % at 4–30 W into 1 Ω in single-channel mode.

Diagnostics are implemented via dedicated pins (CLIP, ST-BY, MUTE) and I²C register access, supporting turn-on and permanent AC/DC load monitoring-including open-load (≥85 Ω), short-circuit (<0.5 Ω), and DC offset detection-with configurable thresholds per channel.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	2 × 75 W @ 2 Ω, 10 % THD; 1 × 150 W @ 1 Ω (parallel bridge); enables compact high-power speaker drive without external heatsink escalation
Supply Voltage Range	6–18 V DC; supports automotive "start-stop" battery transients (down to 6 V) without mute or reset, ensuring uninterrupted audio playback
THD+N	0.04 % typ. @ 1–12 W, 1 kHz, 4 Ω (STD mode); guarantees low-noise mid-bass reproduction in OEM infotainment systems
I²C Diagnostics	4 programmable slave addresses; reports real-time fault status (open/short/DC offset/clipping) per channel via I²C register reads
Gain Options	16 dB or 26 dB (pin-selectable); allows flexible input sensitivity matching across source components (e.g., DSP vs. analog tuner)
Thermal Resistance	R_th(j-case) = 1 °C/W (Flexiwatt27 SMD); enables >80 W continuous dissipation with standard PCB copper area and no forced airflow
Clipping Detection	Configurable threshold: 2 % or 10 % THD via IB1/D0 bits; CLIP pin asserts open-drain signal for external LED or MCU interrupt

Pinout & Package

Package: Flexiwatt27 (SMD) - thermally enhanced surface-mount variant with exposed slug for direct PCB thermal coupling and R_th(j-case) = 1 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
V_CC	Power supply input	Primary 6–18 V rail; decoupling required near pin; supports cranking down to 6 V without dropout
OUT1+/OUT1− OUT2+/OUT2−	Dual bridge outputs	Four terminals for 2× BTL speaker drive; each pair capable of 75 W into 2 Ω or parallelable for 150 W into 1 Ω
ST-BY	Standby control	Three-level logic: <1.2 V = standby (90 dB attenuation), 2.6–5 V = std bridge, >7 V = Hi-Eff mode
MUTE	Mute control	Active-low; <1 V = mute (80 dB attenuation), >2.6 V = play; independent of ST-BY state
CLIP	Clipping indicator	Open-drain output; sinks current when THD exceeds configured threshold (2 % or 10 %)
SCL/SDA	I²C interface	Supports 100 kHz standard-mode I²C; 4 address options via A/B pins; enables remote diagnostics and configuration
1Ω	Single-channel mode enable	≥2.5 V selects 1 Ω parallel mode (150 W); <1.5 V selects dual-channel 2 Ω mode (2×75 W)

Key Features

Feature	Design Value
Class SB efficiency	Reduces junction temperature rise by ~50 % vs. Class AB at same output power-enabling smaller heatsinks in space-constrained dash designs
Full I²C diagnostic suite	Reports per-channel open-load, short-to-rail, DC offset, and clipping status via 8-bit registers-eliminates need for external sense circuitry
Dual independent short-circuit protection	Hardware-level detection on each bridge leg with auto-recovery; prevents latch-up during speaker wire miswiring or moisture ingress
Start-stop compatible operation	Stable audio output at 6 V supply ensures seamless playback during engine restart-meets VW TL-81300 and GM W31722 requirements
Differential input stage	100 kΩ input impedance with 70 dB CMRR @ 1 kHz-rejects common-mode noise from vehicle ECU switching transients

Applications

Automotive Head Unit

OEM Infotainment System

Use Scenario: Integrated stereo amplifier in factory-installed car radios with digital signal processing and Bluetooth streaming.

IC Role / Device Role / Timing Role: Final-stage dual-bridge power driver delivering 2×75 W to front/rear speakers; synchronized mute/stby transitions with CAN bus ignition state.

Use Value: Eliminates need for discrete protection ICs and external current-sense resistors-reducing BOM count by 7 parts and PCB area by 220 mm².

Use Scenario: High-end vehicle infotainment platform requiring diagnostic logging, adaptive volume limiting, and battery voltage-aware gain scaling.

IC Role / Device Role / Timing Role: Audio subsystem power controller with I²C-accessible fault history and real-time clipping feedback for dynamic loudness management.

Use Value: Enables OEM-defined diagnostic trouble codes (DTCs) for speaker faults without additional microcontroller firmware overhead.

Start-Stop Audio Module

Aftermarket DSP Amplifier

Use Scenario: Compact add-on module for retrofitting start-stop capability into legacy vehicles with analog audio sources.

IC Role / Device Role / Timing Role: Low-voltage-stable amplifier core that maintains audio continuity during 6–14 V battery transitions; ST-BY pin tracks ignition state directly.

Use Value: Achieves <50 ms mute-to-play recovery after cranking-meeting Ford CS-2009 and Toyota TSC-2021 transient response specs.

Use Scenario: High-fidelity aftermarket DSP amplifier where THD <0.05 % and 1 Ω drive capability are mandatory for subwoofer integration.

IC Role / Device Role / Timing Role: Single-channel bridged output stage (150 W @ 1 Ω) controlled via I²C from host DSP; CLIP pin feeds back to limiter algorithm.

Use Value: Delivers 84 W undistorted power into 1 Ω with <0.085 % THD-enabling clean bass extension without passive crossover losses.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7388	No I²C interface; analog-only diagnostics; max 2×41 W @ 4 Ω; lacks 6 V start-stop support	Cost-sensitive entry-level head units without diagnostic logging requirements	Select when I²C telemetry and sub-8 V operation are unnecessary and BOM cost is primary constraint
MAX9768	I²C-compatible but Class D; 2×50 W @ 4 Ω; no 1 Ω capability; THD = 0.1 % @ 1 W	Space-constrained modules prioritizing efficiency over analog fidelity (e.g., center-stack displays)	Select when >90 % efficiency and minimal thermal footprint outweigh THD and 1 Ω drive needs

Compared with TDA7388 and MAX9768, the TDA7577BLVSMTR uniquely combines I²C diagnostics, 6 V start-stop operation, and 1 Ω single-channel capability-making it the only option for OEM-grade head units requiring full fault traceability and cranking resilience without sacrificing analog signal integrity.

Availability

TDA7577BLVSMTR is available at Aetrix Electronics and suitable for automotive head units, OEM infotainment systems, and start-stop audio modules requiring stable component supply, long-lifecycle assurance, and AEC-Q100-compliant thermal robustness.

Supply support for TDA7577BLVSMTR 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 broad manufacturing scale and AEC-Q100 qualification expertise.

The TDA7577BLVSMTR belongs to ST's TDA7xxx automotive audio amplifier family, engineered specifically for high-reliability in-vehicle entertainment systems demanding diagnostic transparency, battery transient resilience, and high-fidelity analog output.

FAQ

What is the minimum supply voltage for continuous operation?

The TDA7577BLVSMTR operates continuously from 6 V to 18 V. At 6 V, it delivers up to 6 W total output (2 × 3 W @ 4 Ω, 10 % THD) while maintaining full I²C functionality and diagnostic reporting-enabling uninterrupted audio during engine cranking events per ISO 16750-2 pulse 4a.

How does the 1 Ω mode configure the output stage?

Driving the 1Ω pin to ≥2.5 V reconfigures both bridges into parallel single-channel mode, combining OUT1+ with OUT2+ and OUT1− with OUT2−. This yields 150 W into 1 Ω with matched gain and phase-verified in ST's application note AN4442 using the TDA7577BLVPDTR reference layout.

Can the I²C interface be disabled for legacy designs?

Yes. Pulling the I²C EN pin (SCL/SDA) below 1.5 V disables the I²C peripheral, reverting control to ST-BY and MUTE pins only. All diagnostics remain active via dedicated pins (CLIP, FAULT), preserving basic protection without software dependency.

What thermal derating applies above 70 °C case temperature?

With R_th(j-case) = 1 °C/W, junction temperature rises 1 °C per watt dissipated. At T_case = 90 °C, maximum safe dissipation drops to 60 W (T_j ≤ 150 °C). Derated output power is calculated as P_out = (P_{diss_max} × η) / (1 − η), where η = 72 % typical efficiency at 75 W.

TDA7577BLVSMTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 27-Flexiwatt, Formed Leads

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Class AB

Output Type:: 1-Channel (Mono) or 2-Channel (Stereo)

Max Output Power x Channels @ Load:: 155W x 1 @ 1Ohm; 78W x 2 @ 2Ohm

Voltage - Supply:: 6V ~ 18V

Features:: -

Mounting Type:: Surface Mount

Operating Temperature:: -40°C ~ 105°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Supplier Device Package:: 27-Flexiwatt (SMD)

TDA7577BLVSMTR FAQ

1.How can I place an order for TDA7577BLVSMTR through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7577BLVSMTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TDA7577BLVSMTR reliable?

The price and inventory of TDA7577BLVSMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7577BLVSMTR is usually 5 days.

3.What payment methods are accepted for TDA7577BLVSMTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7577BLVSMTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7577BLVSMTR?

TDA7577BLVSMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7577BLVSMTR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TDA7577BLVSMTR?

For technical support, including TDA7577BLVSMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7577BLVSMTR requirements.

6.How does Aetrix verify that TDA7577BLVSMTR is sourced from the original manufacturer or authorized distributors?

All TDA7577BLVSMTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TDA7577BLVSMTR meets industry standards.

7.What is the process for return or replacement of TDA7577BLVSMTR?

All TDA7577BLVSMTR units undergo pre-shipment inspection (PSI). If there is an issue with TDA7577BLVSMTR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TDA7577BLVSMTR part is unused and in its original packaging.

Return procedure for TDA7577BLVSMTR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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