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

STMicroelectronics TDA7565

Name: TDA7565
Brand: STMicroelectronics
SKU: TDA7565
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TDA7565

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 27-Flexiwatt, Formed Leads

Datasheet:: TDA7565.pdf

Description:: IC AMP AB QUAD 59W 27FLEXIWATT

Quantity:: RFQ Add To RFQ list

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Inventory:2,576

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Product details

Overview

TDA7565 from STMicroelectronics is a quad-channel Class-AB automotive audio power amplifier with integrated step-up DC/DC converter in Flexiwatt27 package. It delivers up to 4 × 59 W into 4 Ω at 14.4 V supply with PWM boost (17.5 V), supports I²C-controlled gain selection (12 dB / 26 dB), hardware mute, and full fault protection including four independent short-circuit detectors. It is engineered for OEM car radio systems requiring stable audio output during start-stop battery profiles.

For engineers reviewing the TDA7565 datasheet, TDA7565 pinout, TDA7565 application, or TDA7565 equivalent, key selection considerations include its integrated voltage converter operation (15–18.5 V programmable output), I²C-configurable clipping detection thresholds (1 % / 10 % THD), thermal foldback at 155–185 °C, and compliance with low-voltage cranking down to 6.5 V.

Technical Context

The TDA7565 integrates a non-switching high-efficiency analog power stage using DMOS output transistors and a synchronous buck-boost switching converter controlled via I²C. Its four independent bridge outputs are fully protected with DC offset detection, thermal warning (165 °C), and per-channel short-circuit sensing.

I²C interface enables dynamic configuration of gain mode (26 dB / 12 dB), high-efficiency vs. standard operating mode, converter enable/disable, regulated voltage selection (15/16.5/17.5/18.5 V), and switching frequency (90–470 kHz). Standby current is ≤ 50 µA; total quiescent drain current is 250–300 mA (converter off) or 350 mA (converter on).

Key Specifications

Parameter	Value and Actual Design Meaning
Output Power	4 × 59 W max @ Vs = 14.4 V + PWM = 17.5 V, 4 Ω load - enables loud, distortion-free audio under start-stop battery dip
THD+N	0.03 % typ. @ 1–12 W, 1 kHz - ensures high-fidelity reproduction without audible distortion
Supply Voltage Range	8–18 V (converter off); 6.5–7.5 V min. startup threshold - sustains operation during engine cranking
I²C Interface	Standard-mode (≤ 400 kHz), 7-bit address with R/W bit - allows microcontroller-based system-level control and diagnostics
Thermal Protection	Foldback activation at 155–185 °C; thermal warning flag at 165 °C - prevents latch-up and enables graceful shutdown
Clipping Detection	Selectable 1 % or 10 % THD threshold via I²C - provides real-time signal integrity monitoring for automatic volume limiting
Gain Options	26 dB (low-noise line-out) or 12 dB (high-power speaker drive) per channel - supports dual-path audio routing

Pinout & Package

Package: Flexiwatt27 (vertical, ECOPACK® compliant), 27-pin thermally enhanced power package with exposed metal tab for heatsink mounting. Thermal resistance junction-to-case is ≤ 1 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27	See Figure 2 (top view): includes VS, VCC1/VCC2, GNDs (S_GND, AC_GND, PW_GND), IN/OUT pairs for LF/RF/LR/RR, I²C (SDA/SCL), MUTE, CLK, DATA, and TAB (thermal pad)	Pin 27 is MUTE input (threshold 1.5 V); pins 1–4 and 21–24 are channel inputs; pins 5–8 and 17–20 are corresponding bridge outputs; TAB is electrically connected to PW_GND and requires low-thermal-resistance heatsinking

Key Features

Feature	Design Value
Integrated Step-Up Converter	Programmable 15–18.5 V output with selectable 90–470 kHz switching frequency - eliminates external boost IC and reduces BOM count
Per-Channel Protection	Four independent short-circuit detectors + DC offset detection (±2.5 V range) - enables channel-isolated fault recovery without global shutdown
I²C Configurable Gain	26 dB (low-noise preamp output) or 12 dB (speaker driver) per channel - supports flexible signal chain architecture
Start-Stop Compliance	Operates continuously down to 6.5 V supply with no pop/click - meets latest OEM cranking profile requirements (e.g., VW TL 81315)
Low Quiescent Current	≤ 50 µA standby current - minimizes battery drain during vehicle ignition-off state

Applications

OEM Car Radio Head Unit

Start-Stop Audio System

Use Scenario: Integrated infotainment head unit with 4-speaker layout and digital audio source.

IC Role / Device Role / Timing Role: Quad-channel analog output stage driving front/rear speakers; I²C-managed gain, mute, and converter enable.

Use Value: Eliminates need for external boost converter and discrete protection circuitry, reducing PCB area by ~35 % and component count by ≥12 parts.

Use Scenario: Vehicle audio system operating during engine stop at traffic lights with battery voltage dropping to 6.5 V.

IC Role / Device Role / Timing Role: Maintains uninterrupted audio playback via internal voltage converter supplying regulated 17.5 V to output stage.

Use Value: Prevents audible pop/click artifacts and maintains ≥85 % rated output power during cranking events lasting up to 500 ms.

Automotive Aftermarket Amplifier

Diagnostics-Enabled Audio Module

Use Scenario: Compact 4-channel aftermarket amplifier with remote level control and thermal management.

IC Role / Device Role / Timing Role: Primary power amplification and real-time thermal/fault reporting via I²C status registers (DB1–DB4).

Use Value: Enables firmware-driven thermal derating and channel-specific fault logging without external ADC or comparator circuits.

Use Scenario: Audio subsystem requiring automated DC offset validation and clipping event logging.

IC Role / Device Role / Timing Role: Performs on-demand offset detection (via IB1 D5) and reports clipping status (DB1 D5) and short-circuit flags (DB1–DB4 D1).

Use Value: Reduces production test time by 40 % through integrated self-test capability instead of external oscilloscope-based verification.

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
TDA7561	No integrated voltage converter; fixed 26 dB gain; lower max output (4 × 45 W @ 14.4 V)	Suitable only for conventional 12 V systems without start-stop support	Select when cost sensitivity outweighs cranking resilience and converter integration is unnecessary
TDA7851	Higher PSRR (70 dB), wider bandwidth (100 kHz), but no I²C-configurable clipping threshold or offset detection	Targeted at premium audio systems prioritizing SNR and transient response over diagnostic features	Prefer when THD < 0.01 % and 20 Hz–20 kHz flat response are mandatory, and diagnostics are handled externally

Compared with TDA7561 and TDA7851, the TDA7565 uniquely combines start-stop compliance, per-channel I²C diagnostics, and programmable converter output-making it the only option supporting OEM-level cranking robustness *and* embedded fault visibility in a single chip.

Availability

TDA7565 is available at Aetrix Electronics and suitable for automotive infotainment head units, start-stop compliant audio modules, and diagnostics-enabled amplifier designs requiring stable component supply across extended temperature ranges (−40 °C to +105 °C).

Supply support for TDA7565 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 quality certifications (AEC-Q100, ISO/TS 16949).

The TDA7565 belongs to ST's TDA7xxx automotive audio amplifier family, designed specifically to meet stringent OEM requirements for low-voltage cranking resilience, integrated diagnostics, and reduced system-level BOM complexity in modern car radios.

FAQ

What is the minimum supply voltage required to start the TDA7565?

The TDA7565 has a guaranteed startup threshold of 6.5 V (typical 7 V, max 7.5 V) when the voltage converter is enabled. Below this, the device remains in reset and will not initialize its internal logic or output stage, ensuring reliable behavior during deep battery sag events typical in start-stop systems.

How does the integrated voltage converter affect thermal design?

The converter operates at 90–470 kHz and contributes ~10–15 % additional power dissipation versus converter-off operation. With R_{th j-case} ≤ 1 °C/W, heatsink design must accommodate up to 80 W total P_tot at T_case = 70 °C - requiring ≥ 12 cm² copper area (2 oz) or active cooling for sustained 4 × 59 W output.

Can the TDA7565 be used without I²C control?

Yes - default power-on configuration enables all four channels at 26 dB gain, converter disabled, and mute inactive. However, critical functions like converter enable, gain switching, clipping detection, and fault readback require I²C communication; standalone operation forfeits start-stop compliance and diagnostic capabilities.

What is the purpose of the two separate ground pins (S_GND and AC_GND)?

S_GND (signal ground) routes low-current analog reference paths for inputs and I²C; AC_GND (audio ground) carries high-current return paths for output stages and converter switching. Separating them prevents coupling of switching noise into sensitive analog nodes, maintaining >50 dB supply rejection ratio (SVR) across 100 Hz–10 kHz.

TDA7565 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 27-Flexiwatt, Formed Leads

Packaging:: Tube

Product Status:: Obsolete

Type:: Class AB

Output Type:: 4-Channel (Quad)

Max Output Power x Channels @ Load:: 59W x 4 @ 4Ohm

Voltage - Supply:: 8V ~ 18V

Features:: 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)

TDA7565 FAQ

1.How can I place an order for TDA7565 through Aetrix?

Please submit a Request for Quotation (RFQ) for TDA7565 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 TDA7565 reliable?

The price and inventory of TDA7565 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7565 is usually 5 days.

3.What payment methods are accepted for TDA7565?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7565 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TDA7565?

TDA7565 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TDA7565 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 TDA7565?

For technical support, including TDA7565 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7565 requirements.

6.How does Aetrix verify that TDA7565 is sourced from the original manufacturer or authorized distributors?

All TDA7565 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 TDA7565 meets industry standards.

7.What is the process for return or replacement of TDA7565?

All TDA7565 units undergo pre-shipment inspection (PSI). If there is an issue with TDA7565, 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 TDA7565 part is unused and in its original packaging.

Return procedure for TDA7565:

1.Submit a request within 90 days.

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

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