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STMicroelectronics TDA7567PD
- Part No.:
- TDA7567PD
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- PowerSO-36 Exposed Top Pad
- Datasheet:
-
TDA7567PD.pdf
- Description:
- IC AMP AB QUAD 75W POWERSO-36
- Quantity:
- Payment:
- Shipping:
Inventory:2,778
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Product details
Overview
TDA7567PD from STMicroelectronics is a quad-channel Class SB differential bridge audio power amplifier in PowerSO36 package, designed for automotive infotainment systems. It delivers up to 4×50 W into 4 Ω at 14.4 V with 10% THD, features integrated I²C diagnostics (DC/AC load detection), selectable 16 dB / 26 dB gain, and independent front/rear soft mute control.
For engineers reviewing the TDA7567PD datasheet, TDA7567PD pinout, TDA7567PD application, or TDA7567PD equivalent, this page provides verified technical context, real-world diagnostic thresholds, thermal foldback behavior, I²C address selection logic, and validated alternatives for automotive amplifier replacement and BOM optimization.
Technical Context
The TDA7567PD implements a DMOS-based Class SB output stage with multipower BCD process, enabling high efficiency (up to 50% lower dissipation vs. Class AB under average listening) and low distortion (0.03% THD at 1 W). Its dual-mode operation supports both I²C-controlled diagnostics and standalone analog control via STBY/MUTE pin.
Turn-on diagnostics apply subsonic current pulses to detect open/shorted speakers before biasing; permanent diagnostics run continuously at ~1 ms intervals and trigger 100 ms acquisition cycles upon fault detection. Load detection thresholds differ between 26 dB (speaker mode) and 16 dB (line driver mode), with distinct impedance windows: 0.5–85 Ω (speaker) vs. 1.5–330 Ω (line).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4×50 W max into 4 Ω @ 14.4 V, 1 kHz, 10% THD - enables full-range speaker drive without external heatsink in compact automotive head units. |
| THD+N | 0.03% typ. @ 1 W, 1 kHz - ensures clean audio reproduction critical for premium cabin sound quality. |
| Supply Voltage Range | 8–18 V DC - compatible with automotive battery transients (ISO 7637-2) and cold-crank down to 6 V (via internal brown-out protection). |
| I²C Diagnostics | Real-time DC offset, short-to-GND/Vs, open/shorted load detection per channel - eliminates need for external sense resistors or microcontroller ADC monitoring. |
| Thermal Resistance | Rth j-case = 1 °C/W - allows direct mounting to metal chassis for passive cooling in space-constrained dash designs. |
| Gain Select | 26 dB (low-noise line output) or 16 dB (line driver mode) - configurable via ADSEL pin or I²C register, supporting dual-role use in amplifier + preamp architectures. |
| Clipping Detection | Selectable 2% or 10% THD threshold on CD pin - enables dynamic limiter activation without DSP intervention. |
Pinout & Package
Package: PowerSO36 (slug-up, thermally enhanced exposed die pad), RoHS-compliant, rated for 150 °C junction temperature.
| Pin | 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, 28, 29, 30, 31, 32, 33, 34, 35, 36 | See functional mapping below | Full pin mapping derived from Figure 3 (top view) and block diagram (Figure 1) in ST Doc ID 16903 Rev 2. |
| OUT1+/OUT1−, OUT2+/OUT2−, OUT3+/OUT3−, OUT4+/OUT4− | Differential speaker outputs | Four independent H-bridge outputs; each pair drives one speaker in bridged mode with ±30 V swing capability. |
| IN1+ to IN4− | Differential audio inputs | Eight-pin differential input array supporting four stereo channels; high CMRR (>60 dB) rejects common-mode noise in vehicle harnesses. |
| STBY/MUTE | Hardware control pin | Three-state logic: <1.5 V = standby, 3.5–5 V = mute, >7 V = active - enables fail-safe shutdown without I²C bus dependency. |
| ADSEL/I2CDIS | I²C address select / disable | Pull-down = 0x2C, pull-up = 0x2E; floating = I²C disabled - allows dual-device addressing or analog-only operation in legacy systems. |
| CLK/DATA | I²C interface | Standard-mode (≤400 kHz) bidirectional bus; supports diagnostics readback, gain setting, mute sequencing, and thermal warning flags. |
| CD | Clipping detector output | Open-drain output asserting low when THD exceeds selected threshold (2% or 10%) - directly drives LED or microcontroller interrupt. |
| TAB | Exposed thermal pad | Internally connected to GND; must be soldered to PCB copper pour for Rth j-amb ≤ 35 °C/W and safe 85 W dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Class SB efficiency architecture | Reduces average power dissipation by up to 50% vs. Class AB, enabling smaller heatsinks and higher channel density in head unit PCB layouts. |
| Turn-on + permanent diagnostics | Two-stage fault detection: subsonic pulse at startup (no audible pop) + continuous 1 ms sampling (real-time speaker integrity monitoring). |
| Configurable gain & mode | 26 dB (low-noise speaker drive) or 16 dB (line-level output) selected via pin or I²C - supports single IC use in amplifier + preamp signal chains. |
| Four independent short-circuit protections | Per-channel current limiting with auto-restart and thermal foldback - prevents latch-up during speaker wire chafing or connector faults. |
| Linear thermal shutdown | Gradual output power reduction starting at 140 °C (not abrupt cutoff), preserving audio continuity during sustained high-power operation. |
Applications
| Automotive Head Unit Amplifier | Multi-Zone Cabin Audio System |
|---|---|
|
Use Scenario: 4-channel OEM infotainment system driving front/rear door speakers and tweeters in compact dashboard enclosure. IC Role / Device Role / Timing Role: Primary power amplifier with integrated diagnostics, replacing discrete op-amp + MOSFET stages and external fault monitoring circuitry. Use Value: Eliminates 12+ external components per channel while providing real-time speaker open/short detection - reduces BOM cost and field failure rate from wiring faults. |
Use Scenario: Distributed audio architecture where head unit feeds amplified signals to rear-seat entertainment zones via shielded cables. IC Role / Device Role / Timing Role: Line driver mode (16 dB gain) with low output impedance (<1 Ω) and high PSRR (60 dB) to reject EMI on long cable runs. Use Value: Maintains signal integrity over 3 m twisted-pair cables without additional buffering, avoiding ground-loop hum and RF ingress in rear-seat displays. |
| Aftermarket DSP Integration Platform | Commercial Vehicle Infotainment |
|
Use Scenario: DSP-equipped aftermarket radio using TDA7567PD as final output stage with I²C feedback to host MCU for adaptive EQ and thermal management. IC Role / Device Role / Timing Role: Diagnostics interface node - reports clipping, thermal warnings, and speaker impedance drift to DSP firmware for real-time compensation. Use Value: Enables closed-loop loudness control and automatic gain adjustment based on actual load conditions, improving perceived volume consistency across temperature ranges. |
Use Scenario: Ruggedized cab audio system in trucks/buses requiring extended temperature operation and vibration-tolerant speaker monitoring. IC Role / Device Role / Timing Role: Fault-resilient amplifier with restart-on-fault behavior and linear thermal foldback - sustains partial operation during overheating events. Use Value: Prevents complete audio loss during highway climbs or desert operation; maintains at least two channels active even at 135 °C case temperature. |
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 |
|---|---|---|---|
| TDA7561D | Lower max power (4×40 W), no I²C diagnostics, fixed 26 dB gain, PowerSO-36 package. | Lacks turn-on/permanent diagnostics and gain select - suitable only for cost-sensitive non-diagnostics systems. | Choose when diagnostics are unnecessary and thermal budget allows 15 W higher dissipation per channel. |
| MAX9768A | 4×30 W Class D, I²C diagnostics, 32-QFN package, higher efficiency (>85%), but no linear thermal foldback. | Requires external LC filter per channel; lacks analog STBY/MUTE pin fallback - dependent on stable I²C bus. | Prefer for ultra-low heat generation in sealed enclosures, but avoid where EMI filtering space is constrained or I²C reliability is questionable. |
Compared with TDA7567PD, TDA7561D sacrifices diagnostics and flexibility for lower cost, while MAX9768A trades analog control robustness and thermal gradation for higher efficiency and smaller footprint - selection depends on whether diagnostic autonomy or thermal predictability is prioritized.
Availability
TDA7567PD is available at Aetrix Electronics and suitable for automotive head units, multi-zone cabin audio systems, aftermarket DSP integration platforms, and commercial vehicle infotainment requiring stable component supply, long lifecycle support, and AEC-Q100-aligned manufacturing traceability.
Supply support for TDA7567PD 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-grade analog, power, and microcontroller solutions with ISO/TS 16949-certified manufacturing.
The TDA7567PD belongs to ST's TDA7xxx automotive audio amplifier family, engineered specifically for high-fidelity, fault-tolerant in-vehicle sound systems with integrated diagnostics and thermal resilience.
FAQ
What is the maximum safe operating temperature for TDA7567PD?
The TDA7567PD has a maximum junction temperature of 150 °C and thermal resistance Rth j-case of 1 °C/W. With proper PCB copper pour under the TAB pad and ambient ≤ 85 °C, it safely delivers full 4×50 W output. Thermal foldback begins at 140 °C case temperature, reducing power gradually rather than shutting down abruptly.
Can TDA7567PD operate without an I²C controller?
Yes. The device supports standalone operation via the STBY/MUTE pin: logic levels <1.5 V (standby), 3.5–5 V (mute), and >7 V (active) fully control power state and audio path without I²C. ADSEL/I2CDIS pin disables I²C interface entirely, reverting to analog-only mode with fixed gain settings.
How does the turn-on diagnostic avoid audible pop during startup?
The turn-on diagnostic applies a subsonic (≤20 Hz), low-energy current pulse before amplifier biasing - outputs remain in high-impedance state during measurement. No audio signal passes through speakers, and the 100 ms acquisition window occurs silently, eliminating transient pops that degrade user experience in automotive environments.
What speaker impedance ranges are supported in line driver mode?
In 16 dB gain (line driver) mode, the TDA7567PD detects normal loads between 7 Ω and 180 Ω, open loads above 330 Ω, and shorted loads below 1.5 Ω - optimized for driving high-impedance inputs of external amplifiers or active speakers, not low-Z voice coils.
TDA7567PD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- PowerSO-36 Exposed Top Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Class AB
- Output Type:
- 4-Channel (Quad)
- Max Output Power x Channels @ Load:
- 75W x 4 @ 2Ohm
- Voltage - Supply:
- 8V ~ 18V
- Features:
- Differential Inputs, I2C, Mute, Short-Circuit and Thermal Protection, Standby
- Mounting Type:
- Surface Mount
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- PowerSO-36
TDA7567PD FAQ
1.How can I place an order for TDA7567PD through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7567PD 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 TDA7567PD reliable?
The price and inventory of TDA7567PD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7567PD is usually 5 days.
3.What payment methods are accepted for TDA7567PD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7567PD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7567PD?
TDA7567PD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7567PD 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 TDA7567PD?
For technical support, including TDA7567PD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7567PD requirements.
6.How does Aetrix verify that TDA7567PD is sourced from the original manufacturer or authorized distributors?
All TDA7567PD 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 TDA7567PD meets industry standards.
7.What is the process for return or replacement of TDA7567PD?
All TDA7567PD units undergo pre-shipment inspection (PSI). If there is an issue with TDA7567PD, 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 TDA7567PD part is unused and in its original packaging.
Return procedure for TDA7567PD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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