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STMicroelectronics STPA002CD-48X
- Part No.:
- STPA002CD-48X
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 27-Flexiwatt, Formed Leads
- Datasheet:
-
STPA002CD-48X.pdf
- Description:
- IC AMP AB QUAD 85W 27FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:3,544
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Product details
Overview
STPA002CD-48X from STMicroelectronics is a quad-channel Class AB MOSFET audio power amplifier in Flexiwatt27 package, designed for automotive infotainment systems. It delivers up to 52 W per channel into 4 Ω at 14.4 V (10 % THD), operates down to 6 V supply, and integrates offset detection (OD), clipping diagnostics (CD-DIAG), standby, mute, and robust protection against load dump, reverse battery, and thermal overload.
For engineers reviewing the STPA002CD-48X datasheet, STPA002CD-48X pinout, STPA002CD-48X application, or STPA002CD-48X equivalent, key selection criteria include low-voltage start-stop compatibility (6–18 V), 2 Ω load driving capability, integrated DC offset and clipping detection, and OEM-compliant protection architecture for hybrid vehicle battery transients.
Technical Context
The STPA002CD-48X implements four independent Class AB amplifier channels with internally fixed 26 dB gain and no external compensation required. Its input stage is ground-referenced with 45–65 kΩ impedance, and SVR pin provides internal VCC/4 reference for biasing and ripple rejection.
Protection logic includes real-time output DC offset detection (±1 V threshold), soft thermal limiting with 150 °C junction limit, and fault recovery via three-state output during short circuits to GND, Vs, or across loads. Clipping detection (CD-DIAG) operates reliably down to 7 V supply and triggers at ≥1 % THD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4 × 52 W max into 4 Ω @ 14.4 V, 10 % THD - enables high-fidelity rear/surround speaker drive without external heatsink oversizing |
| Supply Range | 6–18 V DC - supports stop-start and hybrid vehicle battery transitions without mute or pop artifacts |
| THD+N | 0.01 % typ. @ 4 W, 4 Ω - meets Hi-Fi distortion requirements for premium car audio front-stage amplification |
| Channel Gain | 26 dB ±1 dB - eliminates need for external gain-setting resistors and reduces BOM count |
| Input Impedance | 45–65 kΩ - ensures stable interface with standard preamp outputs and minimizes loading effects |
| SVR Rejection | 70 dB typ. @ 100 Hz - suppresses alternator ripple and maintains clean audio under engine load |
| Thermal Resistance | 1 °C/W junction-to-case - enables direct mounting to chassis or compact heatsink for 200 W total dissipation |
Pinout & Package
STPA002CD-48X uses the Flexiwatt27 (vertical) thermally enhanced package with exposed metal slug (TAB) for low thermal resistance. Pin numbering follows top-view layout with 27 leads including dedicated power grounds per channel and diagnostic pins OD and CD-DIAG.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB (Pin 1 & 27) | Thermal slug / GND | Primary heat path to heatsink; must be electrically connected to system ground for safety and thermal performance |
| OD (Pin 2) | Offset detector output | Open-drain signal asserting when differential output exceeds ±1 V - used for speaker protection and fault logging |
| CD-DIAG (Pin 26) | Clipping diagnostics | Active-low open-drain output indicating ≥1 % THD - enables real-time audio quality monitoring and dynamic headroom management |
| ST-BY (Pin 5) | Standby control | Logic-compatible input (threshold 1.2 V OFF / 2.6 V ON); requires RC filter for pop-free entry/exit |
| MUTE (Pin 22) | Mute control | Logic-compatible input (threshold 1.2 V MUTE / 2.6 V PLAY); must be sequenced before ST-BY transitions |
| SVR (Pin 11) | Supply voltage reference | Internal VCC/4 reference node; capacitor here sets startup/shutdown timing and improves PSRR |
| OUT1+ to OUT4− (Pins 6,9,10,17–20,21,23,24) | Differential outputs | Four fully independent bridge-tied-load (BTL) outputs - each pair drives one speaker without external coupling capacitors |
Key Features
| Feature | Design Value |
|---|---|
| Integrated DC offset detection | Monitors output differential voltage in real time; asserts OD pin if >±1 V - prevents speaker damage from DC faults |
| Clipping diagnostics with CD-DIAG | Guaranteed operation down to 7 V supply; outputs active-low flag at ≥1 % THD - enables adaptive volume limiting |
| No external bootstrap or compensation | Internally compensated with fixed 26 dB gain - eliminates 4–6 passive components per channel and reduces PCB area |
| Stop-start & hybrid battery compliance | Operates continuously at 6 V with graceful automute below threshold - meets Ford, GM, and VW low-voltage OEM specs |
| Comprehensive fault protection | Short-to-GND/Vs/across-load, overtemperature (soft limiter), reverse battery, load dump (50 V/50 ms), and open-GND detection |
Applications
| Automotive Infotainment Head Unit | Premium Rear Seat Entertainment |
|---|---|
Use Scenario: Integrated 4-channel amplifier in OEM head unit powering front left/right and rear left/right speakers. IC Role / Device Role / Timing Role: Primary audio power stage delivering full-range signals with <0.01 % THD+N and seamless operation during engine cranking (6–16 V transients). Use Value: Eliminates need for external protection ICs and gain-setting networks while maintaining AEC-Q100 reliability and OEM qualification. | Use Scenario: Compact amplifier module in rear-seat DVD player driving dual-zone headphones or seatback speakers. IC Role / Device Role / Timing Role: Quad BTL output stage with integrated mute/standby sequencing and SVR-controlled pop-free startup. Use Value: Reduces bill-of-materials by 12+ passives vs. discrete solutions and enables single-supply 12 V design without DC-blocking caps. |
| Hybrid Vehicle Audio System | Aftermarket Car Stereo Amplifier |
Use Scenario: Audio subsystem in plug-in hybrid EV handling rapid battery voltage surges (e.g., 12 V → 16 V in <10 ms on engine start). IC Role / Device Role / Timing Role: Robust power amplifier with fast-responding automute and clipping detection to suppress transient artifacts during battery topology switches. Use Value: Sustains uninterrupted playback without audible pops - validated per ISO 16750-2 load dump and ISO 7637-2 pulse 5a/b. | Use Scenario: High-power 4-channel amplifier board in aftermarket stereo supporting 2 Ω speaker loads and loudness optimization. IC Role / Device Role / Timing Role: Output stage with 85 W/channel into 2 Ω and integrated offset detection to prevent voice coil burnout during impedance mismatch. Use Value: Enables safe 2 Ω operation without external current-sense circuitry - simplifies thermal design and improves reliability margin. |
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 | Quad Class AB, 45 W/ch into 4 Ω, no integrated clipping detection, requires external compensation | Lacks CD-DIAG and automute; lower PSRR (60 dB) and higher quiescent current (250 mA typ.) | Choose when cost sensitivity outweighs diagnostic capability and thermal efficiency |
| TPA5560QPHPRQ1 | Quad Class D, 50 W/ch into 4 Ω, 90 % efficiency, but requires external gate drivers and LC filters | Higher efficiency but larger solution size; no integrated offset detection or SVR-based pop suppression | Prefer for battery-constrained systems where thermal density matters more than analog simplicity |
Compared with TDA7388 and TPA5560QPHPRQ1, STPA002CD-48X uniquely combines Class AB linearity, integrated diagnostics (OD/CD-DIAG), 6 V operational floor, and zero-external-compensation architecture - making it optimal for space-constrained, high-reliability OEM audio modules requiring minimal support circuitry.
Availability
STPA002CD-48X is available at Aetrix Electronics and suitable for automotive infotainment head units, premium rear-seat entertainment systems, hybrid vehicle audio subsystems, and aftermarket high-fidelity car stereo amplifiers requiring stable component supply across extended temperature and voltage ranges.
Supply support for STPA002CD-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, industrial, and power management ICs with broad AEC-Q100 qualified portfolios.
The STPA series targets high-reliability automotive audio applications, emphasizing robustness against battery transients, integrated protection, and simplified system design for OEM and Tier-1 infotainment platforms.
FAQ
What is the minimum supply voltage for continuous operation?
The STPA002CD-48X operates continuously down to 6 V DC supply. Below this threshold, automute activates to protect speakers, and the device resumes playback automatically once voltage returns above 5.5 V. This behavior is validated per ISO 16750-2 and supports modern stop-start vehicle architectures without external supervision circuitry.
How does the CD-DIAG pin function in system-level diagnostics?
CD-DIAG is an open-drain output that pulls low when THD exceeds 1 %, enabling microcontroller polling or interrupt-driven response. It remains functional down to 7 V supply and provides real-time insight into amplifier headroom usage - allowing dynamic volume limiting or equalizer adjustment to maintain fidelity during high-output conditions.
Can STPA002CD-48X drive 2 Ω speakers safely?
Yes - it delivers up to 55 W per channel into 2 Ω at 14.4 V (10 % THD) with built-in protection against excessive current, thermal runaway, and DC offset. The MOSFET output stage and soft thermal limiter ensure safe sustained operation without external current-sense resistors or foldback circuitry.
What is the role of the SVR pin beyond startup timing?
SVR serves three critical roles: (1) internal VCC/4 reference for input biasing, (2) node for capacitor-based supply ripple rejection (improving PSRR by 70 dB at 100 Hz), and (3) half-supply generator for output stage common-mode voltage - collectively enabling pop-free transitions and stable operation across wide battery fluctuations.
STPA002CD-48X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 27-Flexiwatt, Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Class AB
- Output Type:
- 4-Channel (Quad)
- Max Output Power x Channels @ Load:
- 85W x 4 @ 2Ohm
- Voltage - Supply:
- 6V ~ 18V
- Features:
- Mute, Standby
- Mounting Type:
- Through Hole
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 27-Flexiwatt (Vertical)
STPA002CD-48X FAQ
1.How can I place an order for STPA002CD-48X through Aetrix?
Please submit a Request for Quotation (RFQ) for STPA002CD-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 STPA002CD-48X reliable?
The price and inventory of STPA002CD-48X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPA002CD-48X is usually 5 days.
3.What payment methods are accepted for STPA002CD-48X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPA002CD-48X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPA002CD-48X?
STPA002CD-48X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPA002CD-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 STPA002CD-48X?
For technical support, including STPA002CD-48X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPA002CD-48X requirements.
6.How does Aetrix verify that STPA002CD-48X is sourced from the original manufacturer or authorized distributors?
All STPA002CD-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 STPA002CD-48X meets industry standards.
7.What is the process for return or replacement of STPA002CD-48X?
All STPA002CD-48X units undergo pre-shipment inspection (PSI). If there is an issue with STPA002CD-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 STPA002CD-48X part is unused and in its original packaging.
Return procedure for STPA002CD-48X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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