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

STMicroelectronics TDA75610S-48X

Name: TDA75610S-48X
Brand: STMicroelectronics
SKU: TDA75610S-48X
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA75610S-48X

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 27-Flexiwatt, Formed Leads

Datasheet:: TDA75610S-48X.pdf

Description:: IC AMP AB QUAD 45W 27FLEXIWATT

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TDA75610S-48X from STMicroelectronics is a quad-channel Class SB automotive audio power amplifier in vertical Flexiwatt27 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 (64 W max), and operation down to 6 V for start-stop systems.

For engineers reviewing the TDA75610S-48X datasheet, TDA75610S-48X pinout, TDA75610S-48X application, or TDA75610S-48X equivalent, this device supports independent front/rear soft mute/play, selectable 26 dB/16 dB gain, DC/AC load detection, clipping threshold selection (2%/10%), and linear thermal shutdown with three warning levels - critical for robust car radio and infotainment system design.

Technical Context

The TDA75610S-48X implements ST's patented Class SB architecture - a hybrid efficiency topology combining BCD process MOSFET output stages with adaptive biasing to reduce quiescent dissipation while maintaining low THD (<0.05% at 1–10 W, STD mode). It integrates four independent bridge outputs with DMOS power transistors and dedicated PWGND pins per channel for precise current sensing and short-circuit protection.

Its diagnostic engine operates via I²C bus (address selectable via ADSEL) and reports real-time status including DC offset, AC load impedance, clipping events, and thermal warnings (THWARN1–THWARN3 at 160°C/145°C/125°C). The SVR pin enables advanced battery transient suppression during cranking, and the STBY pin supports hardware-controlled standby/mute with defined voltage thresholds (0–1.2 V standby, 2.9–3.5 V mute, >4.5 V active).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	4 × 45 W max @ 14.4 V, 4 Ω, 10% THD - enables high-fidelity rear/surround speaker drive without external heatsink escalation
Supply Range	6–18 V - supports full "start-stop" battery profile (engine-off 6 V hold-up) and withstands 50 V peak transients (t ≤ 50 ms)
THD+N	0.015% typ. @ 1–10 W, 1 kHz, STD mode - ensures clean mid-bass reproduction with minimal intermodulation distortion
I²C Diagnostics	Full readback of DC offset, AC load state, clipping, thermal warnings, and short-circuit flags per channel - eliminates need for external sense circuitry
Thermal Protection	Linear foldback with three programmable junction temperature warnings (125°C/145°C/160°C) and fast muting - prevents thermal runaway while preserving audio continuity
Clipping Detection	Selectable 2% or 10% THD threshold via IB1 bit - allows dynamic headroom monitoring for DSP-based loudness control or limiter activation
SVR Rejection	70 dB typ. @ 100 Hz–10 kHz - suppresses alternator whine and battery ripple without requiring additional LC filtering

Pinout & Package

Package: Flexiwatt27 (vertical), thermally enhanced through-tab mounting; 27-pin single-row leadframe with exposed metal tab for PCB heat sinking (R_{th j-case} = 1 °C/W).

Pin	Circuit Role	Design Meaning
1 (TAB)	Thermal pad / GND	Primary heat path to PCB copper; must be soldered to large thermal pad for safe 85 W dissipation
22 (OUT4+)	Channel 4 positive output	Bridge output terminal; paired with Pin 23 (OUT4−) to drive RR speaker in BTL configuration
23 (CK)	I²C clock / HE enable	Configures high-efficiency mode when pulled high; doubles as SCL for diagnostics and configuration
25 (PWGND4)	Channel 4 power ground	Dedicated low-inductance return for OUT4±; isolates switching noise from signal ground (Pin 29)
26 (DATA)	I²C data / gain select	Serves as SDA; logic level sets gain: high = 26 dB, low = 16 dB - enables line-output noise optimization
27 (ADSEL)	I²C address select / disable	Defines slave address (0x2A or 0x2B); grounded = I²C enabled, open = disabled (legacy analog-only mode)
4 (OUT2−)	Channel 2 negative output	Completes BTL pair with Pin 17 (OUT2+) for LR speaker; supports 2 Ω loads with current limiting
2 (STBY)	Hardware standby/mute control	Voltage thresholds define state: <1.2 V = standby (90 dB attenuation), 2.9–3.5 V = mute (80 dB), >4.5 V = active
16 (CD)	Clipping detector output	Open-drain flag asserted when THD exceeds selected threshold (2% or 10%); drives external LED or MCU interrupt
11 (SVR)	Supply voltage rejection control	Enables internal compensation for battery transients; improves pop/click suppression during cranking events

Key Features

Feature	Design Value
Class SB Efficiency	Reduces average dissipation by ~40% vs. Class AB under typical program material - extends thermal margin and enables smaller heatsinks
Per-Channel Short-Circuit Protection	Four independent current-sense circuits detect shorts to GND, VCC, or speaker opens - prevents latch-up and enables safe fault recovery
DC Offset Detection	Monitors output DC bias on all four channels; triggers I²C alert if >±80 mV - protects speakers from damaging DC current
Start-Stop Compatibility	Stable operation at 6 V supply with full 45 W/channel capability - meets OEM requirements for engine-off audio playback in hybrid/EV platforms
I²C Load Diagnostics	Reports real-time AC impedance magnitude per channel (e.g., 4 Ω OK, 2 Ω OK, open, short) - enables automated speaker health logging

Applications

Automotive Head Unit

Aftermarket Infotainment System

Use Scenario: Integrated 4-channel amplifier in OEM head unit with digital signal processing and vehicle network integration.

IC Role / Device Role / Timing Role: Primary audio power stage driving front/rear speakers; I²C interface synchronizes diagnostics with CAN gateway firmware.

Use Value: Eliminates need for discrete fault monitoring circuitry and reduces BOM count by consolidating protection, diagnostics, and efficiency control in one IC.

Use Scenario: Compact aftermarket stereo supporting Bluetooth streaming, USB playback, and steering wheel controls.

IC Role / Device Role / Timing Role: Quad-bridge output driver with hardware STBY control for ignition-synchronized power sequencing.

Use Value: Enables silent boot-up and seamless mute/unmute transitions using I²C-configurable soft-play timing (25–50 ms).

Start-Stop Audio System

Compact Rear-Seat Entertainment

Use Scenario: Audio subsystem in hybrid vehicle that maintains playback during engine stop/start cycles.

IC Role / Device Role / Timing Role: Low-voltage operational amplifier core; SVR pin actively compensates for 6–14 V battery swings without audio dropout.

Use Value: Delivers uninterrupted 5 W/channel output at 6 V - satisfies EU CO₂ emission compliance for idle-stop functionality.

Use Scenario: Dual-zone rear-seat entertainment module powering two independent speaker pairs.

IC Role / Device Role / Timing Role: Independent front/rear soft-mute control via I²C registers - enables zone-specific audio muting without MCU intervention.

Use Value: Reduces software overhead by offloading mute timing and gain switching to hardware registers (IB1/D0 bits).

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 (36-pin, slug-up); R_{th j-case} = 1 °C/W but requires different PCB layout and thermal via pattern	Better suited for space-constrained layouts where vertical height is limited; less compatible with legacy Flexiwatt27 sockets	Select for new designs prioritizing automated SMT assembly and lower profile; verify thermal pad stencil design per ST AN4622
TDA75610S-8ZX	Same die, Flexiwatt27 SMD variant; identical electrical specs but surface-mount leads require reflow profile adjustment	Designed for high-volume automated production; lacks through-hole mechanical stability for vibration-prone environments	Prefer for cost-sensitive consumer-grade modules; avoid in heavy-duty truck or off-road applications without conformal coating

Compared with TDA75610S-48X, the ZSX offers superior thermal routing in low-profile boards but demands more complex PCB stackup, while the 8ZX simplifies manufacturing at the expense of mechanical ruggedness - the 48X remains optimal for serviceable, vertically mounted automotive head units requiring field-replaceable modules.

Availability

TDA75610S-48X is available at Aetrix Electronics and suitable for automotive head units, start-stop audio systems, aftermarket infotainment modules, and compact rear-seat entertainment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for TDA75610S-48X 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-48X belongs to ST's TDA75xx family of intelligent Class SB audio amplifiers, engineered specifically for next-generation automotive infotainment systems demanding integrated diagnostics, ultra-low-voltage operation, and high power density in compact packages.

FAQ

What is the maximum continuous output power per channel into 2 Ω?

The TDA75610S-48X delivers up to 64 W per channel into 2 Ω loads at 14.4 V with 10% THD, enabled by its DMOS output stage and four independent short-circuit protections. This rating assumes proper PCB thermal design (≥200 cm² copper area under TAB) and ambient temperature ≤40°C. Derating applies above 70°C case temperature per Figure 33 in the datasheet.

How does the I²C diagnostic bus report speaker faults?

The I²C interface provides byte-level status registers (DB1–DB4) indicating DC offset, AC load impedance, clipping, and thermal warnings per channel. For example, DB1 bit D0 reports CH1 short-to-GND, while DB2 bits D6/D7 encode CH2 load state (open, 4 Ω, 2 Ω, short). No external components are needed - all sensing is internal and calibrated at wafer test.

Can the TDA75610S-48X operate without I²C connection?

Yes - tying ADSEL high disables I²C and configures the device for analog-only operation with fixed 26 dB gain, default mute timing, and basic STBY control. All protection features (thermal foldback, short-circuit, clipping detection) remain fully functional; only diagnostic reporting and programmable features (gain, soft-mute, HE mode) are unavailable.

What is the purpose of the SVR pin, and how should it be connected?

The SVR pin connects to the main battery rail (not filtered VCC) and enables internal compensation for supply transients during engine cranking. It must be routed with low-inductance trace directly to the battery feed point. When active, it improves supply ripple rejection by 10–15 dB below 1 kHz, reducing audible alternator noise without adding external capacitors or ferrites.

TDA75610S-48X 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 (Vertical)

TDA75610S-48X FAQ

1.How can I place an order for TDA75610S-48X through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA75610S-48X 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-48X reliable?

The price and inventory of TDA75610S-48X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA75610S-48X is usually 5 days.

3.What payment methods are accepted for TDA75610S-48X?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA75610S-48X transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA75610S-48X?

TDA75610S-48X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA75610S-48X 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-48X?

For technical support, including TDA75610S-48X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA75610S-48X requirements.

6.How does Aetrix verify that TDA75610S-48X is sourced from the original manufacturer or authorized distributors?

All TDA75610S-48X 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-48X meets industry standards.

7.What is the process for return or replacement of TDA75610S-48X?

All TDA75610S-48X units undergo pre-shipment inspection (PSI). If there is an issue with TDA75610S-48X, 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-48X part is unused and in its original packaging.

Return procedure for TDA75610S-48X:

1.Submit a request within 90 days.

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

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