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STMicroelectronics TDA7387EP
- Part No.:
- TDA7387EP
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 25-Flexiwatt, Formed Leads
- Datasheet:
-
TDA7387EP.pdf
- Description:
- IC AMP AB QUAD 41W 25FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:188
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Product details
Overview
TDA7387EP from STMicroelectronics is a 4-channel Class AB audio power amplifier in Flexiwatt25 vertical exposed-pad package, delivering up to 41 W per channel into 4 Ω at 14.4 V supply, with fixed 26 dB gain, integrated standby/mute functions, and automotive-grade thermal operation (–30 °C to +85 °C). It targets high-end car radio head units requiring compact, low-component-count audio output stages.
For engineers reviewing the TDA7387EP datasheet, TDA7387EP pinout, TDA7387EP application, or TDA7387EP equivalent, key selection criteria include its rail-to-rail output swing without bootstrap capacitors, automute on undervoltage detection, thermal limiter behavior, and Flexiwatt25 mechanical mounting constraints for heatsink integration.
Technical Context
The TDA7387EP uses a fully complementary PNP/NPN output stage enabling rail-to-rail voltage swing and eliminating external bootstrap capacitors. Its internal SVR (Supply Voltage Rejection) block biases all inputs and AC-GND (Pin 16) at Vs/2, ensuring zero DC current through feedback networks and enabling high PSRR (65 dB typ. at 100 Hz).
Protection architecture includes short-circuit tolerance to GND, VS, and across load; survival under load dump (50 V peak, 50 ms), reversed battery, and fortuitous open GND; plus soft thermal limiting above 150 °C junction temperature. Muting and standby are CMOS-compatible with defined threshold voltages (1.5 V logic-low, 3.5 V logic-high).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4 × 41 W max into 4 Ω @ 14.4 V, enabling full-range driving of OEM car speakers without external boost. |
| THD+N | 0.04 % typ. @ 4 W, 1 kHz - meets high-fidelity automotive audio requirements below audible distortion threshold. |
| Voltage Gain | 26 dB fixed internal gain - eliminates external gain-setting resistors and reduces layout sensitivity. |
| Supply Range | 14.4 V nominal, 18 V max continuous, 50 V peak (50 ms) - supports wide automotive battery transients including load dump. |
| Thermal Resistance | Rth j-case = 1.3 °C/W - enables 80 W dissipation at 70 °C case temperature, critical for sealed head unit enclosures. |
| Input Impedance | 70–100 kΩ - compatible with standard preamp outputs and allows direct coupling via 0.1 µF AC-coupling caps (flow ≈ 16 Hz). |
| Standby Current | 15 µA max - ensures negligible battery drain during vehicle ignition-off periods. |
Pinout & Package
Package: Flexiwatt25 vertical exposed pad (EP), 25-pin single-in-line (SIL) with metal tab thermally and electrically connected to Pin 1 (GND). Exposed pad must be soldered to PCB copper pour for thermal conduction and EMI shielding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Power Ground / Tab | Mechanically tied to heat slug; must connect to cleanest power ground near supply filter caps for thermal and noise control. |
| 2, 8, 18, 24 | Channel-Specific Power Grounds | Separate GND returns per channel minimize crosstalk and ground loop interference in multi-channel layout. |
| 3, 9, 19, 25 | Outputs (CH1–CH4) | Class AB rail-to-rail outputs; drive 4 Ω speakers directly; no bootstrap required due to complementary topology. |
| 4, 10, 20, 26 | Inverting Inputs | Internally biased at Vs/2 via SVR; require matched input coupling caps (±10 % tolerance) for optimal common-mode rejection. |
| 5, 11, 21, 27 | Non-Inverting Inputs | Ground-referenced audio inputs; accept ±8 Vpk signals without clipping or distortion degradation. |
| 16 | AC-GND | Common reference node for all four amplifiers' inverting inputs; connects to signal GND near input caps to suppress common-mode noise. |
| 22 | Mute Control | CMOS-compatible input; 1.5 V threshold; sourcing ~10 µA - limits series R to ≤70 kΩ to ensure reliable mute activation. |
| 23 | Standby Control | CMOS-compatible input; 1.5 V threshold; <15 µA standby current - enables microcontroller or discrete transistor control with RC filtering for pop-free transitions. |
Key Features
| Feature | Design Value |
|---|---|
| No external compensation required | Stable into standard 4 Ω car speakers without output R-C snubbers - reduces BOM count and board area by ≥3 components per channel. |
| Automute on undervoltage | Activates mute when supply drops below threshold - prevents speaker thump during engine cranking or brownout conditions. |
| Soft thermal limiter | Gradual power reduction above 150 °C junction temperature - avoids abrupt shutdown and maintains audio continuity during thermal stress. |
| Integrated SVR biasing | Internal Vs/2 generation for inputs and AC-GND - eliminates need for external bias dividers and improves PSRR by 15 dB over discrete solutions. |
| Exposed pad thermal interface | Direct metal slug contact to PCB copper - achieves 1.3 °C/W junction-to-case resistance, enabling 80 W dissipation in constrained head unit space. |
Applications
| OEM Car Radio Head Unit | Aftermarket Infotainment System |
|---|---|
|
Use Scenario: Integrated 4-channel audio output stage in factory-installed dashboard radios with space-constrained metal enclosure. IC Role / Device Role / Timing Role: Final power amplification stage driving front/rear speakers; operates continuously during vehicle runtime with thermal cycling from –30 °C to +85 °C ambient. Use Value: Eliminates 16 external components (bootstrap caps, gain resistors, compensation networks) versus discrete op-amp + MOSFET designs, reducing PCB area by >35 %. |
Use Scenario: Modular audio amplifier board in plug-and-play infotainment kits supporting Android Auto and Apple CarPlay. IC Role / Device Role / Timing Role: Quad-channel line-level to speaker-level conversion; synchronized mute/standby controlled by MCU GPIO with RC-filtered edges. Use Value: CMOS-compatible control pins enable direct interfacing with 3.3 V microcontrollers without level shifters, cutting system component count. |
| Compact Rear-Seat Entertainment | Marine Audio Distribution |
|
Use Scenario: Low-profile amplifier module mounted behind rear seatback powering dual-zone headphone-free audio zones. IC Role / Device Role / Timing Role: High-efficiency Class AB output with soft thermal limiting - sustains 25 W/channel average power under sustained cabin temperatures up to 70 °C. Use Value: Exposed pad package allows direct thermal coupling to aluminum chassis, achieving 2× higher power density than SO-24 alternatives. |
Use Scenario: Waterproof audio hub distributing amplified signals to cockpit, cabin, and deck speakers in marine vessels with salt-humidity exposure. IC Role / Device Role / Timing Role: Robust output stage surviving 50 V load dump transients and reversed battery events common in marine battery switching. Use Value: Built-in protections eliminate need for external TVS diodes and reverse-polarity MOSFETs, simplifying conformal coating and sealing design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel automotive audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7388 | Same Flexiwatt25 EP package; 45 W/channel into 4 Ω; higher quiescent current (220 mA vs. 180 mA typ.) | Requires larger heatsink due to +10 % power dissipation; better suited for premium systems needing margin above 41 W | Select when peak output power >41 W is mandatory and thermal headroom permits higher Iq. |
| TPA5560QPHPRQ1 | 4-channel Class D; 50 W/channel; 90 % efficiency; QFN-56 package; requires external gate drivers and LC filters | Lower thermal load but adds 8+ external passive components per channel; incompatible pinout and control logic | Select only when system-level efficiency >85 % is prioritized over BOM simplicity and layout compactness. |
Compared with TDA7387EP, TDA7388 offers higher output headroom at the cost of increased thermal demand, while TPA5560QPHPRQ1 trades component count and layout simplicity for efficiency - making TDA7387EP optimal for cost-sensitive, space-constrained OEM head units where Class AB fidelity and integration outweigh raw efficiency targets.
Availability
TDA7387EP is available at Aetrix Electronics and suitable for OEM car radio head units, aftermarket infotainment systems, and marine audio distribution modules requiring stable component supply, long-lifecycle support, and automotive-qualified thermal performance.
Supply support for TDA7387EP 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, designing and manufacturing analog, microcontroller, power, and automotive ICs for industrial, consumer, and automotive markets.
The TDA7387EP belongs to ST's automotive audio amplifier product line, engineered specifically for high-fidelity, thermally robust, and component-minimized car radio output stages - balancing Class AB sound quality with production-ready integration.
FAQ
What is the maximum safe operating supply voltage for TDA7387EP?
The absolute maximum DC supply voltage is 28 V, but continuous operation above 18 V is not recommended. For automotive environments, it is rated for 50 V peak (50 ms) load dump transients. Sustained operation at 14.4 V nominal ensures optimal thermal performance and longevity within the specified –30 °C to +85 °C ambient range.
Can TDA7387EP drive 2 Ω speakers?
No - the device is characterized and protected for 4 Ω minimum loads. Driving 2 Ω loads exceeds safe operating area limits, triggering thermal shutdown or causing permanent damage due to excessive current (peak >5.5 A) and power dissipation beyond 80 W. External current-limiting circuitry is not supported in the datasheet.
How does the automute function respond to supply voltage sag?
The automute activates when supply voltage falls below a built-in threshold (~10–11 V), muting all channels to prevent audible thumps during engine cranking. It is independent of the external mute pin (Pin 22) and re-enables automatically once Vs rises above the release threshold, with no software or external timing required.
Is the exposed pad on TDA7387EP electrically isolated or grounded?
The exposed pad is internally connected to Pin 1 (power ground) and must be soldered to a PCB copper pour tied to the cleanest power ground point - typically near the main supply filter capacitors. It is not isolated and serves both thermal conduction and EMI shielding functions; floating the pad degrades thermal performance and increases noise susceptibility.
TDA7387EP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 25-Flexiwatt, Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Class AB
- Output Type:
- 4-Channel (Quad)
- Max Output Power x Channels @ Load:
- 41W x 4 @ 4Ohm
- Voltage - Supply:
- -
- Features:
- -
- Mounting Type:
- Through Hole
- Operating Temperature:
- -30°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 25-Flexiwatt (Vertical)
TDA7387EP FAQ
1.How can I place an order for TDA7387EP through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7387EP 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 TDA7387EP reliable?
The price and inventory of TDA7387EP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7387EP is usually 5 days.
3.What payment methods are accepted for TDA7387EP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7387EP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7387EP?
TDA7387EP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7387EP 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 TDA7387EP?
For technical support, including TDA7387EP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7387EP requirements.
6.How does Aetrix verify that TDA7387EP is sourced from the original manufacturer or authorized distributors?
All TDA7387EP 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 TDA7387EP meets industry standards.
7.What is the process for return or replacement of TDA7387EP?
All TDA7387EP units undergo pre-shipment inspection (PSI). If there is an issue with TDA7387EP, 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 TDA7387EP part is unused and in its original packaging.
Return procedure for TDA7387EP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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