Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics TDA7575B

Name: TDA7575B
Brand: STMicroelectronics
SKU: TDA7575B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TDA7575B

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 27-Flexiwatt, Formed Leads

Datasheet:: TDA7575B.pdf

Description:: IC AMP AB MONO/STER 27FLEXIWATT

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,321

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TDA7575B from STMicroelectronics is a dual-channel Class AB MOSFET audio power amplifier designed for automotive head unit applications. It delivers up to 2×75 W into 2 Ω or 1×150 W into 1 Ω, features integrated I²C-controlled digital diagnostics, differential inputs, and full fault protection including DC offset detection and dual independent short-circuit monitoring.

For engineers reviewing the TDA7575B datasheet, TDA7575B pinout, TDA7575B application, or TDA7575B equivalent, key selection considerations include its 1 Ω single-channel driving capability, programmable clipping threshold (2 % / 10 %), I²C address configurability (4 options), and thermal warning/protection thresholds at 150 °C / 170 °C.

Technical Context

The TDA7575B implements a DMOS-based dual-bridge output stage with Multipower BCD process technology, enabling high-efficiency Class AB operation and low distortion (<0.03 % THD at 1–12 W, 1 kHz). Its diagnostic architecture supports both turn-on and permanent AC/DC load monitoring via I²C, with configurable thresholds for open/short load, clipping, and DC offset.

Control logic integrates three dedicated pins (ST-BY/HE, MUTE, 1Ω) for hardware mode selection-standard bridge, high-efficiency, or mono 1 Ω configuration-alongside I²C enable/disable functionality. The device operates across 8–18 V supply range and supports differential analog inputs with 60–130 kΩ input impedance and 25/11 dB dual-gain settings.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	2×75 W @ 2 Ω, 1×150 W @ 1 Ω - enables high-power stereo or bridged mono configurations in compact automotive audio systems
THD+N	0.02 % typ. @ 4–30 W, 1 Ω - ensures clean audio reproduction under demanding low-impedance loads
I²C Diagnostics	Full AC/DC load status reporting via 4-address I²C bus - allows real-time speaker health monitoring without external circuitry
Clipping Detection	Selectable 2 % or 10 % THD threshold - supports precise signal integrity management for dynamic audio content
Thermal Protection	Thermal warning at 150 °C, shutdown at 170 °C - prevents irreversible damage during sustained high-power operation
Supply Range	8–18 V DC - compatible with automotive battery voltage fluctuations including cold-crank (8 V) and load-dump (18 V)
Gain Options	25 dB (G1) or 11 dB (G2) - provides flexibility for line-level vs. preamp-level input sensitivity matching

Pinout & Package

Package: Flexiwatt27 (vertical) and PowerSO36 (slug-up) - thermally optimized for high-power automotive PCB layouts with exposed thermal pad (TAB).

Pin/Terminal	Circuit Role	Design Meaning
OUT1+/OUT1− OUT2+/OUT2−	Dual bridge outputs	Four terminals supporting independent stereo channels or BTL mono; capable of 1 Ω parallel operation when 1Ω pin >2.5 V
IN1+/IN1− IN2+/IN2−	Differential audio inputs	High-CMRR (60 dB) inputs reject noise in vehicle environments; support 60–130 kΩ source impedance
ST-BY/HE	Mode control	Three-state logic: <1.5 V = standby, 3.5–5 V = standard bridge, 7–18 V = high-efficiency mode
MUTE	Signal muting	Hardware mute activation at 0–1.5 V; play mode at 3.5–18 V; attenuation ≥80 dB
1Ω	Configuration select	Enables mono 1 Ω operation when >2.5 V; disables dual-bridge mode and routes outputs in parallel
I2C-EN	I²C interface enable	0–1.5 V disables I²C; 2.5–18 V enables full digital diagnostics and gain/standby control
CD_OUT	Clipping indicator	Open-drain diagnostic pin reflecting clipping status when I²C is disabled; sinks 1 mA at <300 mV
SVR	Supply rejection reference	Internal node used for supply ripple rejection measurement; not user-connected
TAB	Thermal pad	Electrically connected to VS; must be soldered to large copper pour for thermal dissipation (R_{th j-case} = 1 °C/W)

Key Features

Feature	Design Value
Dual independent short-circuit protection	Each channel monitors output current separately; triggers fault reporting without disabling the other channel
Programmable clipping threshold	Two selectable THD levels (2 % or 10 %) allow optimization for fidelity-critical or loudness-focused audio designs
Turn-on + permanent diagnostics	Verifies speaker connection integrity at power-up and continuously during playback - reduces field failure due to wiring faults
1 Ω single-channel driving	Parallel output configuration delivers 150 W into ultra-low-impedance subwoofers without external bridging components
High-efficiency (HE) mode	Reduces quiescent current and thermal dissipation by ~50 % vs. conventional Class AB under average listening conditions

Applications

Automotive Head Units

Aftermarket Stereo Receivers

Use Scenario: Integrated amplifier in OEM car radio platforms requiring robust thermal performance and speaker fault detection.

IC Role / Device Role / Timing Role: Dual-bridge audio power stage with real-time I²C diagnostics for speaker continuity, clipping, and DC offset.

Use Value: Eliminates need for external fault-sensing circuitry and reduces warranty claims from open/short speaker wiring.

Use Scenario: High-output aftermarket receiver supporting 4-channel speaker systems and subwoofer bridging.

IC Role / Device Role / Timing Role: Configurable Class AB amplifier with hardware-selectable HE mode and 1 Ω mono capability.

Use Value: Enables flexible system design - stereo 4 Ω, BTL 2 Ω, or mono 1 Ω - using one IC footprint and layout.

Compact Audio DSP Amplifiers

Commercial Vehicle Infotainment

Use Scenario: DSP-driven audio module where digital diagnostics feed back to host processor for adaptive EQ or limiter adjustment.

IC Role / Device Role / Timing Role: I²C-slave audio amplifier providing real-time load impedance and clipping status to upstream controller.

Use Value: Allows dynamic gain scaling and thermal derating based on actual speaker loading and signal content.

Use Scenario: Ruggedized infotainment system in buses or trucks exposed to wide temperature and vibration ranges.

IC Role / Device Role / Timing Role: Thermally hardened dual-bridge amplifier with 150 °C thermal warning and 170 °C shutdown.

Use Value: Maintains safe operation during prolonged high-volume use in poorly ventilated enclosures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA7560	Higher 2×80 W output @ 2 Ω; no 1 Ω mono mode; fixed 26 dB gain; no I²C diagnostics	Lacks digital diagnostics and 1 Ω capability; suited for cost-sensitive stereo-only systems	Choose when diagnostic reporting is unnecessary and maximum 2 Ω power is prioritized over configurability
TDA7851	2×90 W @ 2 Ω; includes built-in DC-DC converter; supports 4.5–28 V supply; I²C diagnostics with enhanced load detection	Wider supply range and integrated power regulation enable direct battery connection without external LDO	Prefer for next-gen designs needing extended voltage tolerance and higher output power with advanced diagnostics

Compared with TDA7560 and TDA7851, the TDA7575B uniquely balances 1 Ω mono capability, I²C-configurable diagnostics, and proven thermal efficiency in legacy automotive platforms - making it optimal for mid-tier head units requiring serviceability and design reuse.

Availability

TDA7575B is available at Aetrix Electronics and suitable for automotive infotainment systems, aftermarket stereo receivers, and commercial vehicle audio modules requiring stable component supply, long lifecycle support, and qualified automotive-grade sourcing.

Supply support for TDA7575B 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 solutions.

The TDA7575B belongs to ST's TDA7xxx automotive audio amplifier product line, engineered specifically for high-fidelity, thermally efficient, and fault-resilient in-vehicle entertainment systems.

FAQ

What is the minimum supply voltage required for TDA7575B operation?

The TDA7575B operates down to 8 V DC, enabling reliable function during automotive cold-crank conditions. Below this threshold, internal biasing fails and output stages disable. Quiescent current remains within specification (50–200 mA typical) across the full 8–18 V range, with thermal derating applied above 14.4 V per datasheet curves.

Can TDA7575B drive 1 Ω loads in stereo mode?

No - 1 Ω operation requires configuring the device in mono mode by asserting the 1Ω pin above 2.5 V, which internally parallels both bridges into a single 150 W channel. In stereo mode, the minimum safe load per channel is 2 Ω; attempting 1 Ω per channel risks thermal shutdown or latch-up due to excessive current density.

How does the I²C diagnostic data map to physical speaker faults?

I²C registers report discrete fault flags: open load (>130 Ω), short to GND (<1.2 V at output), short to VS (>Vs − 0.9 V), and clipping (exceeding programmed THD threshold). Each channel's status is independently readable, allowing precise identification of failed speakers or wiring faults without interrupting audio playback.

Is thermal pad (TAB) connection electrically mandatory?

Yes - the TAB is internally connected to the VS supply rail and serves as the primary thermal path. It must be soldered to a large, multi-layer PCB copper pour with ≥6 thermal vias. Omitting this connection raises junction temperature by >40 °C under full load, triggering premature thermal shutdown and violating absolute maximum ratings.

TDA7575B Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 27-Flexiwatt, Formed Leads

Packaging:: Tube

Product Status:: Active

Type:: Class AB

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

Max Output Power x Channels @ Load:: 150W x 1 @ 1Ohm; 75W x 2 @ 2Ohm

Voltage - Supply:: 8V ~ 18V

Features:: Differential Inputs, I2C, Mute, Short-Circuit and Thermal Protection, Standby

Mounting Type:: Through Hole

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Supplier Device Package:: 27-Flexiwatt (Vertical)

TDA7575B FAQ

1.How can I place an order for TDA7575B through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7575B 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 TDA7575B reliable?

The price and inventory of TDA7575B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7575B is usually 5 days.

3.What payment methods are accepted for TDA7575B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7575B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7575B?

TDA7575B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7575B 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 TDA7575B?

For technical support, including TDA7575B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7575B requirements.

6.How does Aetrix verify that TDA7575B is sourced from the original manufacturer or authorized distributors?

All TDA7575B 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 TDA7575B meets industry standards.

7.What is the process for return or replacement of TDA7575B?

All TDA7575B units undergo pre-shipment inspection (PSI). If there is an issue with TDA7575B, 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 TDA7575B part is unused and in its original packaging.

Return procedure for TDA7575B:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…