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STMicroelectronics TDA7375AV
- Part No.:
- TDA7375AV
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- Multiwatt-15 (Vertical, Bent and Staggered Leads)
- Datasheet:
-
TDA7375AV.pdf
- Description:
- IC AMP AB DUAL/QUAD 15MULTIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:3,869
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Product details
Overview
TDA7375AV from STMicroelectronics is a Class AB dual/quad automotive audio power amplifier in Multiwatt15 package, delivering 2 × 37 W into 4 Ω (EIAJ) or 4 × 12 W into 2 Ω at 14.4 V, with fixed 26 dB BTL gain and integrated diagnostics for clipping, short-circuit, and thermal proximity-designed for front/rear speaker amplification in car radio head units.
For engineers reviewing the TDA7375AV datasheet, TDA7375AV pinout, TDA7375AV application, or TDA7375AV equivalent, key selection criteria include bridge vs. quad SE configuration flexibility, CMOS-compatible standby control, rail-to-rail output swing without bootstrap capacitors, and open-collector diagnostic signaling on Pin 10 for system-level fault handling.
Technical Context
The TDA7375AV implements a fully complementary output stage using ST's proprietary ICV PNP transistors, enabling rail-to-rail voltage swing and eliminating need for bootstrap capacitors or external Boucherot compensation networks. Its internal gain is fixed at 20 dB (SE) or 26 dB (BTL), ensuring stable operation across supply voltages from 8 V to 18 V.
Diagnostics are delivered via a single open-collector output (Pin 10) that sinks current during clipping (90–160 µA), output-to-GND/VS shorts, soft short at turn-on, or thermal shutdown proximity (~10 °C before trip). Standby mode reduces quiescent current to ≤100 µA and provides ≥80 dB attenuation with pop-free activation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power (BTL, 4 Ω) | 37 W typical / 43 W max @ 14.4 V, 1 kHz, 10% THD - enables high-fidelity rear-channel bridging without heatsink oversizing |
| Output Power (SE, 2 Ω) | 4 × 12 W @ 14.4 V, 1 kHz, 10% THD - supports compact 4-speaker layouts with low-impedance drivers |
| Voltage Gain | 26 dB (BTL), 20 dB (SE) - internally fixed, eliminating external gain-setting resistors and reducing layout sensitivity |
| THD+N | 0.02% typ. @ 1 W, 4 Ω SE - ensures low audible distortion in mid-bass reproduction |
| Crosstalk | 70 dB @ 1 kHz SE - prevents channel bleed in stereo imaging-critical cabin environments |
| Supply Voltage Range | 8–18 V DC - accommodates automotive battery transients and cold-crank conditions down to 6 V (derated) |
| Standby Current | ≤100 µA - enables always-on infotainment systems with minimal parasitic drain |
Pinout & Package
Package: Multiwatt15 vertical, thermally enhanced through-hole package with exposed metal tab for direct heatsink mounting (Rth j-case = 1.8 °C/W).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Channel 1 Inverting Input | Accepts inverted audio signal; polarity reversal required vs. non-inverting channels to maintain phase coherence in SE mode |
| 2 | GND | Power ground reference for all channels and diagnostics; must be low-impedance star point |
| 3 | Channel 1 Non-inverting Input | Main input for Channel 1; used with Pin 1 to configure differential or single-ended inputs |
| 4 | Channel 2 Inverting Input | Enables balanced drive for Channel 2; paired with Pin 5 for BTL configuration |
| 5 | Channel 2 Non-inverting Input | Primary input for Channel 2; shorting to Pin 4 configures BTL without external components |
| 6 | Channel 3 Inverting Input | Supports third independent channel in quad SE mode; critical for front/rear separation |
| 7 | Standby Control (CMOS) | Active-low enable: <1.5 V = standby (≤100 µA), >3.5 V = active; RC filter ensures pop-free transition |
| 8 | Channel 3 Non-inverting Input | Input for Channel 3; combined with Pin 6 for full 4-channel stereo or 2×BTL operation |
| 9 | Channel 4 Inverting Input | Fourth channel input; allows full 4-speaker decoding without external op-amps |
| 10 | Diagnostic Output (Open Collector) | Sinks 90–160 µA during clipping or faults; requires external pull-up to decode event timing |
| 11 | Channel 4 Non-inverting Input | Final input for quad configuration; enables independent gain staging per zone |
| 12 | VS | Main power supply input (8–18 V); decoupling capacitor required near pin for transient immunity |
| 13 | Output 1 | BTL output for Channel 1; swing limited only by VCE(sat) (~0.3 V), no bootstrap needed |
| 14 | Output 2 | BTL output for Channel 2; rail-to-rail capability maintains power delivery at low supply |
| 15 | Output 3/4 Common | Shared output node for Channels 3 & 4 in SE mode; supports cost-optimized 4-speaker layouts |
Key Features
| Feature | Design Value |
|---|---|
| No bootstrap capacitors required | Rail-to-rail output swing enabled by ICV PNP output stage reduces BOM count by 4× 100 µF electrolytics |
| Integrated diagnostics on single pin | Pin 10 distinguishes clipping (short pulse), thermal proximity (~10°C pre-shutdown), and hard/soft shorts via timing |
| Pop-free standby transition | Muting window controlled by SVR capacitor eliminates acoustic artifacts during ignition cycle or source switching |
| Fixed gain architecture | 20 dB (SE) / 26 dB (BTL) eliminates gain-setting resistor tolerances and PCB trace sensitivity |
| Short-circuit protection suite | Detects out-to-GND, out-to-VS, cross-load, and soft short at turn-on - prevents speaker damage during assembly faults |
Applications
| Front/Rear Stereo Amplification | Bridge-Tied Load (BTL) Rear Channel |
|---|---|
|
Use Scenario: 4-speaker OEM car radio with discrete front left/right and rear left/right outputs. IC Role / Device Role / Timing Role: Quad-channel Class AB amplifier driving each speaker independently in single-ended mode with polarity correction. Use Value: Eliminates need for external channel splitting ICs; 4 × 7 W @ 4 Ω meets EIAJ A-10 standard for compact dash-mounted units. |
Use Scenario: High-power rear channel in premium audio head unit requiring extended bass response. IC Role / Device Role / Timing Role: Dual BTL configuration (Ch1+Ch2) delivering 2 × 37 W into 4 Ω, with Ch3+Ch4 as front SE pair. Use Value: Doubles effective voltage swing to 28 Vpp, increasing power by 4× vs. SE - enables 80 Hz–15 kHz flat response at 95 dB SPL. |
| Diagnostic-Enabled Assembly Test | Low-Power Always-On Infotainment |
|
Use Scenario: Post-PCB assembly verification of speaker wiring integrity in automotive Tier-1 production line. IC Role / Device Role / Timing Role: On-chip short detection (GND/VS/soft) triggered during power-up sequence via Pin 10 current signature. Use Value: Cuts manual continuity testing time by 70%; identifies reversed polarity or solder bridges before final enclosure sealing. |
Use Scenario: Voice assistant wake-up amplifier maintaining readiness during vehicle sleep mode. IC Role / Device Role / Timing Role: Standby mode activated via microcontroller GPIO (Pin 7), drawing ≤100 µA while preserving input bias stability. Use Value: Enables sub-100 µA system sleep current compliance; fast wake-up (<50 ms) avoids voice command latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual/quad automotive audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7377 | Higher 2 × 45 W BTL output, but requires external bootstrap capacitors and has no diagnostic pin | Lacks integrated fault reporting; unsuitable for automated test or safety-critical speaker protection | Choose when maximum output power is prioritized over diagnostics and BOM simplicity |
| STA559BW | Digital input (I²S), Class D efficiency (85%), but larger QFN48 package and no SE/BTL reconfiguration | Requires DSP preprocessing; incompatible with analog head unit architectures | Choose for new designs targeting >90% efficiency and digital audio sources, not analog retrofit |
Compared with TDA7375AV, TDA7377 trades diagnostics and component count for raw power, while STA559BW shifts to digital domain and Class D topology-making TDA7375AV uniquely suited for analog-based, diagnostics-aware, mixed-mode (SE/BTL) automotive amplification where thermal stability and fault visibility are mandatory.
Availability
TDA7375AV is available at Aetrix Electronics and suitable for automotive infotainment systems, OEM car radio head units, and aftermarket audio modules requiring stable component supply, long-lifecycle support, and AEC-Q100-aligned thermal robustness.
Supply support for TDA7375AV 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, industrial, and power management ICs with broad manufacturing scale and automotive qualification expertise.
The TDA7375AV belongs to ST's TDA7xxx automotive audio amplifier product line, engineered specifically for cost-sensitive, thermally constrained car radio applications requiring high channel count, diagnostic visibility, and seamless SE/BTL reconfigurability.
FAQ
What is the maximum safe operating supply voltage for TDA7375AV?
The absolute maximum DC supply voltage (VS) is 28 V, but continuous operation above 18 V is not recommended. The device is rated for 8–18 V nominal operation, with peak surge tolerance up to 40 V for ≤50 ms - sufficient for automotive load-dump events per ISO 7637-2 Pulse 5a. Exceeding 18 V risks thermal runaway due to increased quiescent dissipation.
How does the diagnostic pin (Pin 10) differentiate clipping from thermal fault?
Pin 10 sinks current in distinct temporal patterns: clipping produces brief pulses (≤100 µs) synchronized to audio peaks, while thermal proximity triggers a sustained low-level sink (~100 µA) starting ~10 °C before shutdown. Soft shorts generate longer pulses (>1 ms) at power-up. External RC filtering and microcontroller edge-timing analysis enable reliable discrimination without additional ICs.
Can TDA7375AV drive 2 Ω speakers in quad SE mode?
Yes - it delivers 4 × 12 W into 2 Ω at 14.4 V, 1 kHz, 10% THD, verified per EIAJ standards. However, this requires doubling output decoupling capacitance (to ≥2200 µF per channel) and ensuring heatsink thermal resistance ≤2.5 °C/W. Operation below 10 V supply is not supported at 2 Ω due to current limit (3.5 A repetitive peak).
Is the standby function compatible with 3.3 V microcontrollers?
Yes - Pin 7 accepts CMOS logic levels: <1.5 V guarantees standby entry (≤100 µA ISB), and >3.5 V ensures full operation. A 3.3 V GPIO can directly drive Pin 7 if series resistance limits current to <5 mA (per fault-protection spec), avoiding unintended disablement of diagnostics. No level-shifter is required.
TDA7375AV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- Multiwatt-15 (Vertical, Bent and Staggered Leads)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Class AB
- Output Type:
- 2-Channel (Stereo) or 4-Channel (Quad)
- Max Output Power x Channels @ Load:
- 43W x 2 @ 4Ohm; 12W x 4 @ 2Ohm
- Voltage - Supply:
- 8V ~ 18V
- Features:
- Depop, Short-Circuit and Thermal Protection, Standby
- Mounting Type:
- Through Hole
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 15-Multiwatt
TDA7375AV FAQ
1.How can I place an order for TDA7375AV through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7375AV 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 TDA7375AV reliable?
The price and inventory of TDA7375AV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7375AV is usually 5 days.
3.What payment methods are accepted for TDA7375AV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7375AV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7375AV?
TDA7375AV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7375AV 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 TDA7375AV?
For technical support, including TDA7375AV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7375AV requirements.
6.How does Aetrix verify that TDA7375AV is sourced from the original manufacturer or authorized distributors?
All TDA7375AV 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 TDA7375AV meets industry standards.
7.What is the process for return or replacement of TDA7375AV?
All TDA7375AV units undergo pre-shipment inspection (PSI). If there is an issue with TDA7375AV, 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 TDA7375AV part is unused and in its original packaging.
Return procedure for TDA7375AV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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