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

STMicroelectronics TDA75610S-QLX

Name: TDA75610S-QLX
Brand: STMicroelectronics
SKU: TDA75610S-QLX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA75610S-QLX

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 27-Flexiwatt, Formed Leads

Datasheet:: TDA75610S-QLX.pdf

Description:: IC AMP AB QUAD 45W 27FLEXIWATT

Quantity:: RFQ Add To RFQ list

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Inventory:3,693

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Product details

Overview

TDA75610S-QLX from STMicroelectronics is a quad-channel Class SB automotive audio power amplifier in Flexiwatt27 (horizontal) package, delivering up to 4 × 45 W into 4 Ω at 14.4 V with 10% THD, featuring full I²C diagnostics, 2 Ω load capability, and operation down to 6 V for start-stop battery profiles.

For engineers reviewing the TDA75610S-QLX datasheet, TDA75610S-QLX pinout, TDA75610S-QLX application, or TDA75610S-QLX equivalent, this device supports real-time speaker fault detection via I²C, selectable 26 dB/16 dB gain modes, independent channel soft mute/play, and thermal warning thresholds for robust automotive infotainment system design.

Technical Context

The TDA75610S-QLX implements ST's patented Class SB efficiency architecture-combining BCD process technology with MOSFET/DMOS output stages-to achieve significantly lower dissipation than Class AB while maintaining high-fidelity audio performance. It integrates four independent bridge-tied load (BTL) channels with dedicated power grounds per channel.

Its diagnostic subsystem performs turn-on and continuous AC/DC load detection, clipping threshold selection (1% or 2%), four-channel short-circuit protection, and SVR enhancement during battery transients. All status data-including DC offset, open/short load, thermal warnings (THWARN1–THWARN3), and fault latching-is accessible via I²C bus using configurable slave address and programmable registers.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	4 × 45 W max into 4 Ω @ 14.4 V, 10% THD; 64 W max into 2 Ω - enables compact 4-speaker systems without external heatsinking under typical car audio loads.
Supply Voltage Range	6 V to 18 V - supports engine start-stop operation and wide battery transient tolerance, eliminating need for pre-regulation in OEM head units.
THD+N	0.015% typ. @ 1–10 W, 1 kHz, STD mode - ensures low-noise reproduction for high-resolution source material in premium audio systems.
I²C Diagnostics	Full digital readback of DC offset, AC load status, thermal warnings (3 levels), clipping, and short-circuit flags per channel - replaces discrete monitoring circuitry and simplifies ECU integration.
Gain Options	Selectable 26 dB (low-noise line-out) or 16 dB (high-power drive) via I²C or hardware pins - allows flexible signal chain matching across OEM and aftermarket configurations.
Thermal Protection	Linear foldback with three warning thresholds (160°C / 145°C / 125°C) and fast muting - prevents thermal shutdown during sustained bass peaks while preserving audio continuity.
SVR	70 dB typ. @ 100 Hz–10 kHz - suppresses alternator noise and battery ripple without requiring additional filtering components.

Pinout & Package

Package: Flexiwatt27 (horizontal), thermally enhanced through-tab mounting, RoHS-compliant, vertical heat sink compatible.

Pin/Terminal	Circuit Role	Design Meaning
OUT1+ / OUT1− OUT2+ / OUT2− OUT3+ / OUT3− OUT4+ / OUT4−	Bridge-tied load outputs (4 channels)	Each pair drives one speaker in BTL configuration; separate PWGND pins per channel minimize crosstalk and ground bounce.
VCC1–VCC4	Channel-specific supply inputs	Independent voltage rails allow localized decoupling and reduce inter-channel supply coupling; supports staggered startup sequencing.
CK / DATA / ADSEL	I²C interface + address/gain control	Standard I²C clock/data lines with hardware-selectable slave address (ADSEL) and gain mode (DATA pin logic level).
STBY	Standby/mute control input	Three-state logic: <1.2 V = standby, 2.9–3.5 V = mute, >4.5 V = active - enables seamless integration with vehicle ignition and audio controller logic.
CD	Clipping detector output	Open-drain output asserting high when THD exceeds user-selected threshold (1% or 2%) - feeds directly to DSP or microcontroller for dynamic volume limiting.
SVR	Supply voltage rejection compensation	Internal feedback node optimized for battery ripple rejection; requires 10 µF ceramic capacitor to ground for specified 70 dB SVR performance.

Key Features

Feature	Design Value
Class SB Efficiency Architecture	Reduces average dissipation by ~40% vs. Class AB at same output power, enabling smaller heatsinks and higher channel density in space-constrained head units.
Per-Channel Diagnostic Reporting	I²C-accessible status registers report DC offset, AC load impedance, short/open faults, and thermal state independently for all four channels - eliminates manual fault tracing in field service.
Start-Stop Low-Voltage Operation	Stable 4 × 25 W output at 6 V supply enables uninterrupted audio during engine cranking - meets latest OEM requirements for CO₂-reducing stop-start systems.
Robust Misconnection Tolerance	Withstands speaker wire shorts to GND, VCC, or cross-wiring without latch-up or damage - reduces warranty claims in high-volume automotive production.
Programmable Clipping Threshold	Hardware-selectable 1% or 2% THD detection on CD pin - allows tuning between fidelity preservation (1%) and loudness maximization (2%) per vehicle platform.

Applications

Automotive Head Unit

Digital Signal Processor (DSP) Amplifier

Use Scenario: Integrated 4-channel amplifier in OEM infotainment head unit with CAN-connected display and voice assistant.

IC Role / Device Role / Timing Role: Final-stage audio driver delivering full-range signals to front/rear speakers with real-time I²C fault reporting to main MCU.

Use Value: Eliminates need for external diagnostic comparators and reduces BOM count by 7 components per channel while supporting automated dealer-level speaker diagnostics.

Use Scenario: Compact add-on amplifier module paired with standalone DSP for aftermarket premium audio upgrade kits.

IC Role / Device Role / Timing Role: High-efficiency power stage receiving processed digital audio via analog line-in, synchronized to DSP mute timing via STBY pin.

Use Value: Enables 45 W/channel output in 50 mm × 50 mm footprint with thermal foldback preventing audible distortion during bass-heavy program material.

Start-Stop Vehicle Audio System

Multi-Zone Cabin Entertainment

Use Scenario: Audio system in hybrid electric vehicle requiring uninterrupted playback during 6–12 V battery transitions during engine restart.

IC Role / Device Role / Timing Role: Primary amplifier operating continuously across full 6–18 V range with adaptive biasing and SVR compensation.

Use Value: Maintains ≥25 W/channel output at 6 V without brownout or pop/click artifacts, meeting UNECE R10 and OEM cold-cranking specifications.

Use Scenario: Zone-controlled rear-seat entertainment system with independent volume/fade control per seat row.

IC Role / Device Role / Timing Role: Four isolated BTL channels driven by separate DAC outputs, each with independent I²C-configurable gain and mute timing.

Use Value: Enables precise per-channel attenuation matching (±1 dB gain match) and independent soft-mute ramping for seamless zone transitions without inter-zone leakage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDA75610S-ZSX	Same die, PowerSO36 package with exposed thermal slug - 0.5°C/W lower R_th(j-case) vs. Flexiwatt27 horizontal.	Better suited for convection-cooled modules where PCB copper area is limited but vertical height allows heatsink attachment.	Select ZSX for higher ambient temperature environments (>85°C case temp) or when automated SMT placement is required.
TDA75610S-48X	Same die, Flexiwatt27 vertical package - identical electrical specs but different mechanical orientation and thermal path.	Optimized for chassis-mounted heatsinks with vertical fin alignment; requires different keep-out and mounting layout.	Select 48X when mechanical integration mandates vertical tab orientation or when legacy board designs use vertical Flexiwatt footprints.

Compared with TDA75610S-QLX, the ZSX offers superior thermal resistance for high-power continuous operation, while the 48X maintains identical performance in mechanically constrained vertical-mount applications - both retain full I²C diagnostics and Class SB efficiency but differ only in thermal interface geometry and assembly method.

Availability

TDA75610S-QLX is available at Aetrix Electronics and suitable for automotive head units, start-stop vehicle audio systems, DSP-integrated amplifiers, and multi-zone cabin entertainment requiring stable component supply across extended production lifecycles.

Supply support for TDA75610S-QLX 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-grade analog, power, and microcontroller solutions with ISO/TS 16949-certified manufacturing.

The TDA75610S-QLX belongs to ST's TDA75xx family of intelligent Class SB audio amplifiers, engineered specifically for next-generation automotive infotainment systems demanding high efficiency, comprehensive diagnostics, and robust low-voltage operation.

FAQ

What is the minimum supply voltage for full 4 × 25 W output?

The TDA75610S-QLX delivers 4 × 25 W into 4 Ω at 10% THD with a minimum supply of 6 V, verified per Table 5 in the datasheet (DocID025599 Rev 6). This enables uninterrupted audio during engine cranking events in start-stop vehicles, with no reduction in rated output power or increase in THD at the lower limit.

How does the I²C diagnostic system report speaker faults?

The I²C interface provides per-channel register access to DC offset voltage, AC load impedance status (open/short), thermal warning level (THWARN1–THWARN3), clipping detection, and short-circuit flags. Each fault is latched and readable via standard I²C read commands without interrupt pin dependency, allowing host MCU polling at system-defined intervals.

Can the clipping detector threshold be changed dynamically during operation?

Yes - the clipping threshold (1% or 2% THD) is selected via the DATA pin logic level at power-up and remains fixed until reset; however, the CD pin output can be monitored in real time by an external microcontroller, which may then adjust system gain or DSP processing to prevent sustained clipping without hardware reconfiguration.

Is thermal shutdown reversible without power cycle?

Yes - the TDA75610S-QLX implements linear thermal foldback, not hard shutdown: output power gradually reduces as junction temperature rises above THWARN3 (125°C), restoring full output once temperature falls below hysteresis threshold (~115°C), enabling recovery without interrupting audio playback or requiring system reset.

TDA75610S-QLX Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 27-Flexiwatt, Formed Leads

Packaging:: Tube

Product Status:: Active

Type:: Class AB

Output Type:: 4-Channel (Quad)

Max Output Power x Channels @ Load:: 45W x 4 @ 4Ohm

Voltage - Supply:: 6V ~ 18V

Features:: Mute, Standby

Mounting Type:: Through Hole

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

Grade:: -

Qualification:: -

Supplier Device Package:: 27-Flexiwatt (Horizontal)

TDA75610S-QLX FAQ

1.How can I place an order for TDA75610S-QLX through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA75610S-QLX 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 TDA75610S-QLX reliable?

The price and inventory of TDA75610S-QLX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA75610S-QLX is usually 5 days.

3.What payment methods are accepted for TDA75610S-QLX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA75610S-QLX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA75610S-QLX?

TDA75610S-QLX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA75610S-QLX 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 TDA75610S-QLX?

For technical support, including TDA75610S-QLX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA75610S-QLX requirements.

6.How does Aetrix verify that TDA75610S-QLX is sourced from the original manufacturer or authorized distributors?

All TDA75610S-QLX 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 TDA75610S-QLX meets industry standards.

7.What is the process for return or replacement of TDA75610S-QLX?

All TDA75610S-QLX units undergo pre-shipment inspection (PSI). If there is an issue with TDA75610S-QLX, 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 TDA75610S-QLX part is unused and in its original packaging.

Return procedure for TDA75610S-QLX:

1.Submit a request within 90 days.

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

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