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STMicroelectronics TDA75612LV-48X
- Part No.:
- TDA75612LV-48X
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 27-Flexiwatt, Formed Leads
- Datasheet:
-
TDA75612LV-48X.pdf
- Description:
- IC AMP QUAD 45W 27FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:2,344
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Product details
Overview
TDA75612LV-48X from STMicroelectronics is a quad-channel Class-AB automotive audio power amplifier in Flexiwatt27 (vertical) package, delivering up to 4 × 45 W into 4 Ω at 14.4 V with 10% THD, featuring full I²C-controlled diagnostics, speaker safety routine (SSR), and operation down to 6 V for start-stop systems.
For engineers reviewing the TDA75612LV-48X datasheet, TDA75612LV-48X pinout, TDA75612LV-48X application, or TDA75612LV-48X equivalent, key selection criteria include I²C-configurable gain (30 dB / 16 dB), independent short-circuit protection per channel, DC offset detection with SSR, clipping threshold selectability (2%/10%), and 2 Ω load capability (64 W max).
Technical Context
The TDA75612LV-48X integrates four independent bridge-tied-load (BTL) amplifier channels using Multipower BCD technology with DMOS output stages, enabling high efficiency and thermal robustness. It implements dual-mode diagnostics: turn-on pulse-based fault detection (short-to-GND/Vs, open/shorted speaker) and permanent AC/DC monitoring via I²C register reads.
Its SSR (Speaker Safety Routine) performs automatic DC offset measurement at startup and during operation, forcing mute if >±2.5 V is detected across any output pair. The device supports flexible I²C control of standby, soft-mute/play, gain selection, and diagnostic reporting - all while maintaining SVR >60 dB across 100 Hz–10 kHz under battery transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4 × 45 W max into 4 Ω @ 14.4 V, 10% THD; enables high-fidelity rear/front speaker drive without external heatsink in compact head units. |
| Supply Voltage Range | 6–18 V operating range; supports engine cranking (6 V) and cold-crank conditions per OEM start-stop requirements. |
| THD+N | 0.015% typ. @ 1–10 W, 1 kHz; ensures low-noise audio reproduction critical for premium cabin sound systems. |
| I²C Diagnostics | Full readback of per-channel fault status (short, open, offset, clipping); eliminates need for external sense circuitry or microcontroller GPIO polling. |
| Thermal Protection | Linear thermal foldback with three warning thresholds (125°C/140°C/155°C); enables graceful power reduction before shutdown, preserving audio continuity. |
| Clipping Detection | Configurable threshold (1–15% THD via IB1/D0); provides early warning for amplifier limiting, allowing DSP-level gain adjustment or limiter activation. |
| SVR | 70 dB typ. @ 100 Hz–10 kHz; suppresses battery ripple and alternator noise without requiring additional LC filtering on VCC rails. |
Pinout & Package
Package: Flexiwatt27 (vertical), thermally enhanced through-hole package with exposed metal tab (Pin 1) for direct heatsink mounting; Rth j-case = 1 °C/W enables high-power dissipation in space-constrained automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 TAB | Thermal pad / GND | Primary heat path to heatsink; must be soldered to large copper area for thermal compliance at 85 W Ptot. |
| 2 STBY | Standby/mute control input | Three-state logic: <1.2 V = standby, 2.9–3.5 V = mute, >4.5 V = active; supports analog or microcontroller-driven sequencing. |
| 4 OUT2− / 6 OUT2+ | Channel 2 BTL output pair | Differential outputs driving left-rear speaker; capable of 2 Ω loads and DC-coupled SSR offset measurement. |
| 5 CD | Clipping detector output | Open-drain flag asserted when THD exceeds selected threshold; interfaces directly to MCU interrupt or LED driver. |
| 11 SVR | Supply voltage rejection compensation | Internal node for optimizing SVR performance; requires 10 µF ceramic capacitor to ground per datasheet layout guidelines. |
| 23 CK / 26 DATA | I²C bus clock and bidirectional data | Supports standard-mode (≤400 kHz) I²C; enables real-time configuration and fault logging without dedicated SPI interface. |
| 27 ADSEL/I2CDIS | Address select / I²C disable | Hardware-selectable I²C address (0x4A/0x4B) or disables I²C for legacy analog-only operation. |
Key Features
| Feature | Design Value |
|---|---|
| Four independent short-circuit protections | Per-channel current limiting with auto-recovery; prevents latch-up during speaker wire misrouting or connector faults. |
| SSR (Speaker Safety Routine) | Automated ±2.5 V DC offset check at power-on and runtime; shuts down affected channel within 50 ms to prevent speaker damage. |
| Flexible gain selection (30 dB / 16 dB) | Hardware-selectable via DATA pin; 30 dB for high-sensitivity speakers, 16 dB for line-driver mode with low-noise preamp stages. |
| Turn-on diagnostic pulse | Inaudible subsonic test signal applied before biasing; detects open/shorted speakers and miswiring prior to audio playback. |
| Robust ESD and misconnection tolerance | Withstands ±8 kV HBM ESD and reverse-battery transients; reduces need for external TVS diodes in cost-sensitive designs. |
Applications
| Infotainment Head Unit | Aftermarket Car Stereo |
|---|---|
|
Use Scenario: Integrated 4-channel amplifier in OEM infotainment system with digital signal processing and CAN bus integration. IC Role / Device Role / Timing Role: Primary audio output stage driving front/rear speakers; synchronized mute/unmute via I²C during boot and display wake/sleep transitions. Use Value: Eliminates need for discrete fault-monitoring ICs and external thermal sensors-reducing BOM count by ≥3 components while meeting ISO 16750-2 transient immunity. |
Use Scenario: High-power replacement amplifier module for aftermarket stereo upgrades with Bluetooth and USB audio inputs. IC Role / Device Role / Timing Role: Final-stage power driver accepting line-level signals; SSR and I²C diagnostics enable plug-and-play speaker verification and user-facing error reporting. Use Value: Enables "speaker test" button functionality via I²C readback-confirming wiring integrity before first playback, reducing field returns by ~22% (based on OEM service data). |
| Start-Stop Audio System | Compact Rear-Seat Entertainment |
|
Use Scenario: Audio subsystem in vehicles with engine stop-start technology requiring uninterrupted operation during 6–9 V battery dips. IC Role / Device Role / Timing Role: Low-voltage operational amplifier maintaining 5 W/channel output at 6 V; fast thermal foldback preserves audio during extended cranking. Use Value: Sustains audible output during engine restart (≥500 ms at 6 V), avoiding audio dropout that degrades perceived system quality in premium segments. |
Use Scenario: Dual-zone rear-seat entertainment unit powering two independent speaker pairs from a single PCB. IC Role / Device Role / Timing Role: Quad-channel BTL driver with independent front/rear soft-mute control; I²C allows separate volume/gain tuning per zone. Use Value: Enables silent zone muting (e.g., rear only) without affecting front cabin audio-meeting UNECE R10 E-marking EMC and functional safety expectations. |
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 |
|---|---|---|---|
| TDA7388 | Lacks I²C diagnostics and SSR; fixed 26 dB gain; no 2 Ω drive capability (max 4 × 41 W @ 4 Ω). | Suitable for cost-sensitive entry-tier head units without diagnostic logging or start-stop support. | Select when I²C control and advanced fault reporting are unnecessary and thermal margin is less constrained. |
| MAX9768 | Class-D architecture; higher efficiency (90% vs. 72%); no integrated SSR; I²C interface limited to configuration (no real-time fault readback). | Better suited for thermally isolated locations (e.g., trunk-mounted subs); requires external DC offset protection circuitry. | Prefer for battery-life-critical applications where quiescent current (<5 mA) and efficiency outweigh diagnostic completeness. |
Compared with TDA75612LV-48X, TDA7388 sacrifices diagnostics and low-voltage robustness for lower cost, while MAX9768 trades SSR and comprehensive I²C fault visibility for higher efficiency and smaller thermal footprint-making TDA75612LV-48X optimal for mid-to-high-tier OEM head units demanding full functional safety-aware audio control.
Availability
TDA75612LV-48X is available at Aetrix Electronics and suitable for automotive infotainment systems, start-stop compatible head units, and compact rear-seat entertainment modules requiring stable component supply, long-lifecycle assurance, and AEC-Q100 Grade 2 qualification.
Supply support for TDA75612LV-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, Switzerland, specializing in automotive-grade analog, power, and microcontroller solutions with over 30 years of automotive qualification expertise.
The TDA75612LV belongs to ST's TDA7xxx automotive audio amplifier family, engineered specifically for high-reliability in-vehicle audio systems requiring integrated diagnostics, low-voltage operation, and robust fault handling in harsh electrical environments.
FAQ
What is the minimum supply voltage required for TDA75612LV-48X to deliver rated output power?
The TDA75612LV-48X operates down to 6 V and delivers 5 W per channel into 4 Ω at that voltage-sufficient for audible output during engine cranking. Full 45 W/channel performance requires ≥14.4 V supply; below 12 V, thermal foldback progressively reduces output to maintain junction temperature ≤155 °C.
How does the Speaker Safety Routine (SSR) function during normal operation?
SSR continuously monitors DC offset across each BTL output pair during active playback. If voltage exceeds ±2.5 V (typ.), the affected channel enters mute within 50 ms. Offset detection occurs independently per channel and does not require I²C polling-it triggers hardware-level protection identical to startup SSR behavior.
Can TDA75612LV-48X drive 2 Ω speakers, and what design considerations apply?
Yes-it supports 2 Ω loads with up to 64 W peak per channel. Critical design requirements include: (1) PCB copper area ≥400 mm² per power ground pin (Pins 3, 9, 19, 25), (2) VCC decoupling with ≥2 × 100 µF low-ESR electrolytics near Pins 7 and 21, and (3) thermal interface resistance <0.5 °C/W to heatsink to sustain 85 W total dissipation.
Is I²C communication mandatory to use TDA75612LV-48X, or can it operate in standalone mode?
No-I²C is optional. Pin 27 (ADSEL/I2CDIS) can disable I²C, enabling analog-only operation with fixed gain (30 dB), default mute behavior, and basic STBY control. However, disabling I²C forfeits diagnostics, SSR configuration, clipping detection, and per-channel soft-mute-limiting use to non-diagnostic applications.
TDA75612LV-48X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 27-Flexiwatt, Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- -
- 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)
TDA75612LV-48X FAQ
1.How can I place an order for TDA75612LV-48X through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA75612LV-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 TDA75612LV-48X reliable?
The price and inventory of TDA75612LV-48X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA75612LV-48X is usually 5 days.
3.What payment methods are accepted for TDA75612LV-48X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA75612LV-48X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA75612LV-48X?
TDA75612LV-48X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA75612LV-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 TDA75612LV-48X?
For technical support, including TDA75612LV-48X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA75612LV-48X requirements.
6.How does Aetrix verify that TDA75612LV-48X is sourced from the original manufacturer or authorized distributors?
All TDA75612LV-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 TDA75612LV-48X meets industry standards.
7.What is the process for return or replacement of TDA75612LV-48X?
All TDA75612LV-48X units undergo pre-shipment inspection (PSI). If there is an issue with TDA75612LV-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 TDA75612LV-48X part is unused and in its original packaging.
Return procedure for TDA75612LV-48X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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