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STMicroelectronics TDA7387EPAG
- Part No.:
- TDA7387EPAG
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 25-Flexiwatt, Formed Leads
- Datasheet:
-
TDA7387EPAG.pdf
- Description:
- IC AMP AB QUAD 41W 25FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:2,586
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Product details
Overview
TDA7387EPAG from STMicroelectronics is a quad-channel Class AB audio power amplifier in Flexiwatt25 vertical exposed pad package, delivering up to 4 × 41 W into 4 Ω loads at 14.4 V supply. It integrates standby/mute functions, internal 26 dB fixed gain, and protection against output short circuits, thermal overload, load dump, reversed battery, and ESD - designed specifically for high-end automotive head units.
For engineers reviewing the TDA7387EPAG datasheet, TDA7387EPAG pinout, TDA7387EPAG application, or TDA7387EPAG equivalent, key selection criteria include rail-to-rail output swing without bootstrap capacitors, ±8 Vpk input tolerance, 0.04% THD at 4 W, SVR of 65 dB, and –40 °C to +105 °C operating range for under-dash automotive deployment.
Technical Context
The TDA7387EPAG uses a fully complementary PNP/NPN output stage enabling rail-to-rail voltage swing and eliminating external bootstrap capacitors. Its AC-GND (Pin 16) is internally biased at Vs/2 via a dedicated Supply Voltage Rejection (SVR) block, shared across all four channels to minimize common-mode noise and simplify biasing.
All inputs are ground-compatible with ±8 Vpk signal handling capability; low-frequency cutoff is 20 Hz (min) and high-frequency cutoff is 75 kHz (typ), supporting full-range audio reproduction. Muting and standby control are CMOS-compatible with defined threshold voltages (1.5 V logic-low, 3.5 V logic-high) and sub-15 µA standby current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4 × 41 W max into 4 Ω @ 14.4 V - enables loud, distortion-limited audio in compact car radio PCBs without forced-air cooling. |
| THD+N | 0.04% typ @ 4 W, 1 kHz - ensures high-fidelity playback with minimal harmonic corruption in mid-bass and vocal bands. |
| Supply Voltage Range | –40 °C to +105 °C operation with 14.4 V nominal, 18 V continuous, 50 V peak (50 ms) - supports cold-crank and load-dump transients in automotive 12 V systems. |
| Voltage Gain | 26 dB fixed internal gain - eliminates external feedback resistors and reduces layout sensitivity to gain drift or mismatch. |
| Input Impedance | 70–100 kΩ - compatible with standard preamp outputs and allows direct coupling with minimal loading on source stages. |
| Cross Talk | 70 dB min @ 1 kHz - maintains channel separation critical for stereo imaging and surround-sound decoding in multi-zone head units. |
| SVR | 65 dB typ @ 100 Hz - suppresses alternator ripple and battery noise without requiring oversized input coupling capacitors. |
Pinout & Package
Package: Flexiwatt25 vertical exposed pad (EPAG suffix), thermally enhanced with integrated metal slug for direct heatsink mounting; Rth j-case = 1.3 °C/W enables >40 W/channel dissipation with moderate heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tab) | Power Ground / Thermal Pad | Mechanically tied to exposed metal slug; must connect to cleanest power ground near supply filter caps for optimal thermal conduction and noise immunity. |
| 2, 8, 18, 24 | Channel Power Grounds | Individual GND returns per channel reduce inter-channel crosstalk and ground bounce in multi-amplifier layouts. |
| 3, 9, 19, 25 | Outputs (CH1–CH4) | Class AB rail-to-rail outputs capable of ±12 V swing @ 14.4 V supply; no bootstrap required due to complementary topology. |
| 4, 10, 20, 26 | Inverting Inputs | Internally referenced to AC-GND (Pin 16); require matched input coupling caps (±10% tolerance) for optimal SVR and pop suppression. |
| 5, 11, 21, 27 | Non-inverting Inputs | Ground-compatible; accept ±8 Vpk signals directly - simplifies interface with DSP or DAC output stages without level-shifting. |
| 12 | AC-GND | Common bias reference for all four amplifiers; connects to Vs/2 via SVR block - must tie C5 capacitor to signal ground near audio inputs. |
| 13 | Standby Input | CMOS-compatible; <1.5 V = standby (µA-level current draw), >3.5 V = active - requires RC filtering to prevent audible turn-on/off transients. |
| 22 | Mute Input | CMOS-compatible; <1.5 V = mute (90 dB attenuation), >3.5 V = play - sourcing ~10 µA; series R ≤ 70 kΩ required to avoid false unmute. |
| 14, 15, 23 | Supply Pins (VS) | Dual VS pins per two channels (14/15 for CH1+CH2; 23 for CH3+CH4) reduce supply impedance and improve channel isolation. |
| 16 | SVR Capacitor Terminal | Connects to C6 (≥10 µF); controls ON/OFF timing sequence and ripple rejection - must tie to signal ground, not power ground. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Eliminates need for external bootstrap capacitors - reduces BOM count by ≥4 parts per channel and PCB area by >15 mm². |
| Integrated thermal limiter | Soft-clamping response above 150 °C junction temperature - prevents abrupt shutdown and preserves audio continuity during sustained high-power operation. |
| Automute at low supply | Activates mute when VS drops below 9 V - suppresses brown-out distortion and protects speakers during engine cranking. |
| No external compensation | Stable into standard 4 Ω car speakers without output Zobel networks - simplifies layout and avoids stability risks from parasitic trace inductance. |
| Reversed battery protection | Withstands –14 V applied to VS pin - enables safe installation in vehicles with incorrect battery polarity without external diode protection. |
Applications
| Automotive Head Unit | Aftermarket Stereo Receiver |
|---|---|
|
Use Scenario: Integrated 4-channel amplifier in OEM or Tier-1 infotainment head unit with digital audio inputs and DSP-based EQ. IC Role / Device Role / Timing Role: Final-stage power driver delivering full-range audio to front/rear speakers; operates synchronously with system power sequencing via STANDBY pin. Use Value: 41 W/channel output enables loudness compliance with EU vehicle noise regulations while maintaining <0.05% THD at rated power. |
Use Scenario: Compact 4×50 W amplifier module in plug-and-play aftermarket receiver replacing factory radio. IC Role / Device Role / Timing Role: Drop-in audio power solution accepting analog RCA inputs; mute/standby controlled by microcontroller GPIOs. Use Value: Exposed pad thermal design allows conduction cooling onto chassis - eliminates need for bulky heatsinks in space-constrained dash enclosures. |
| Multi-Zone Cabin Audio | Compact Rear-Seat Entertainment |
|
Use Scenario: Independent zone amplification for front/rear seat audio routing in premium vehicles with personalized volume control. IC Role / Device Role / Timing Role: Channel-isolated power stage with dedicated power grounds (Pins 2/8/18/24) minimizing inter-zone crosstalk. Use Value: 70 dB cross talk enables discrete audio zones without perceptible bleed-through - critical for rear-seat video playback with independent volume. |
Use Scenario: Low-profile amplifier board mounted behind rear headrests powering dual 4 Ω speakers in compact entertainment systems. IC Role / Device Role / Timing Role: High-efficiency Class AB driver optimized for 12 V battery operation with automute during ignition-off transitions. Use Value: 15 µA standby current extends battery life during vehicle sleep mode - meets ISO 16750-2 quiescent current requirements. |
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 pinout, 4 × 45 W rating, improved THD (0.03% @ 4 W), higher SVR (70 dB), but wider 0.5 mm pitch requiring PCB rework. | Requires updated layout for 2.54 mm → 2.03 mm pin spacing; better suited for new designs targeting lower distortion and higher PSRR. | Select TDA7388 only if redesigning PCB and prioritizing THD/SVR over drop-in compatibility. |
| TPA5560QPHPRQ1 | 4 × 40 W Class D, 90% efficiency, smaller QFN package, but requires external LC filters and gate drivers - no pin compatibility. | Enables fanless operation and reduced thermal mass, yet increases BOM cost and layout complexity versus TDA7387EPAG's simplicity. | Choose TPA5560QPHPRQ1 only when thermal envelope or efficiency is primary constraint and Class D switching noise is acceptable. |
Compared with TDA7387EPAG, TDA7388 offers marginal power/THD gains at layout cost, while TPA5560QPHPRQ1 trades simplicity and analog fidelity for efficiency and size - making TDA7387EPAG optimal for cost-sensitive, layout-constrained Class AB automotive upgrades.
Availability
TDA7387EPAG is available at Aetrix Electronics and suitable for automotive head units, aftermarket stereo receivers, multi-zone cabin audio systems, and compact rear-seat entertainment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TDA7387EPAG 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 including AEC-Q100.
The TDA7387EPAG belongs to ST's TDA7xxx automotive audio amplifier family, engineered specifically for high-reliability, high-output car radio applications where thermal robustness, supply transient immunity, and low-noise analog performance are mandatory.
FAQ
What is the maximum safe operating temperature for TDA7387EPAG?
The TDA7387EPAG has a junction temperature limit of 150 °C and an operational ambient range of –40 °C to +105 °C. Its Flexiwatt25 vertical exposed pad package achieves 1.3 °C/W junction-to-case thermal resistance, enabling reliable operation at 41 W/channel with a heatsink maintaining case temperature ≤70 °C - verified per Table 3 in the official datasheet.
Can TDA7387EPAG drive 2 Ω speakers?
No - the TDA7387EPAG is specified and characterized only for 4 Ω and higher loads. Driving 2 Ω loads exceeds absolute maximum output current ratings (5.5 A non-repetitive peak) and risks triggering thermal shutdown or permanent damage, as confirmed in Section 2.1 Absolute Maximum Ratings and Figure 8 (output power vs. supply voltage).
Is external compensation required for stability?
No external compensation is required. The TDA7387EPAG is intrinsically stable into standard 4 Ω car speakers per its internal compensation design, as explicitly stated in Section 3.4 Stability and layout considerations and validated in Figure 3 (standard test circuit) - eliminating need for output R-C snubbers or Zobel networks.
How does the automute function respond to supply voltage drops?
The automute activates when supply voltage falls below 9 V (typical), attenuating output by ≥80 dB to suppress distortion during engine cranking. This behavior is implemented via internal voltage detection circuitry and is documented in Section "Automute at min. supply voltage detection" under Features and Table 4 (electrical characteristics).
TDA7387EPAG 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:
- 18V
- Features:
- Mute, Standby
- Mounting Type:
- Through Hole
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 25-Flexiwatt (Vertical)
TDA7387EPAG FAQ
1.How can I place an order for TDA7387EPAG through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7387EPAG 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 TDA7387EPAG reliable?
The price and inventory of TDA7387EPAG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7387EPAG is usually 5 days.
3.What payment methods are accepted for TDA7387EPAG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7387EPAG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7387EPAG?
TDA7387EPAG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7387EPAG 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 TDA7387EPAG?
For technical support, including TDA7387EPAG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7387EPAG requirements.
6.How does Aetrix verify that TDA7387EPAG is sourced from the original manufacturer or authorized distributors?
All TDA7387EPAG 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 TDA7387EPAG meets industry standards.
7.What is the process for return or replacement of TDA7387EPAG?
All TDA7387EPAG units undergo pre-shipment inspection (PSI). If there is an issue with TDA7387EPAG, 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 TDA7387EPAG part is unused and in its original packaging.
Return procedure for TDA7387EPAG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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