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STMicroelectronics STPA003HSD-48X
- Part No.:
- STPA003HSD-48X
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 27-Flexiwatt, Formed Leads
- Datasheet:
-
STPA003HSD-48X.pdf
- Description:
- IC AMP AB QUAD 85W 27FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:3,287
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Product details
Overview
STPA003HSD-48X from STMicroelectronics is a quad-channel Class AB MOSFET audio power amplifier in Flexiwatt27 package, designed for automotive head units. It delivers up to 4 × 52 W into 4 Ω and 4 × 85 W into 2 Ω at 14.4 V, operates down to 6 V for start-stop battery profiles, and integrates an on-board 0.4 A high-side driver. Its primary circuit role is high-fidelity multi-channel amplification with integrated protection and low-voltage resilience in car radio systems.
For engineers reviewing the STPA003HSD-48X datasheet, STPA003HSD-48X pinout, STPA003HSD-48X application, or STPA003HSD-48X equivalent, key selection considerations include 2 Ω load capability, GSM noise immunity, automute at low supply voltage (4.5–5.5 V), thermal limiter behavior, and HSD pin functionality for external load control - all critical for robust automotive audio design.
Technical Context
The STPA003HSD-48X implements four independent Class AB output stages with MOSFET power transistors, internally fixed 26 dB gain, and no external compensation required. Its SVR pin establishes internal bias references (VCC/4), enables pop-noise-free startup/shutdown via programmable timing, and enhances supply ripple rejection.
Protection architecture includes output short-circuit detection (to GND, Vs, across load), DC offset sensing (±2.3 V threshold), load-dump tolerance (50 V peak, 50 ms), reversed-battery resilience, and soft thermal limiting triggered above 150 °C junction temperature - all implemented without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 4 × 52 W @ 14.4 V, 4 Ω, 10 % THD - sufficient for premium 4-speaker OEM car audio systems without heatsink oversizing |
| Low-Voltage Operation | Functional down to 6 V - maintains audio playback during engine cranking and start-stop cycles without mute-induced gaps |
| THD+N | 0.01 % typ. @ 4 W, 4 Ω - meets Hi-Fi distortion requirements for front-stage amplification |
| Supply Rejection | 70 dB typ. @ 100 Hz - suppresses alternator ripple and GSM burst interference in vehicle electrical environment |
| High-Side Driver | 0.4 A continuous, 0.25 V dropout - directly drives external relays or LED indicators without buffer stage |
| Thermal Resistance | 1 °C/W junction-to-case - enables compact heatsink design with predictable thermal margin at 85 W max dissipation |
| Input Impedance | 55 kΩ typ. - compatible with standard preamp outputs and minimizes loading on source stages |
Pinout & Package
STPA003HSD-48X uses the Flexiwatt27 vertical package with exposed metal slug (TAB) for thermal conduction. Pin 1 is TAB (case ground); pins 2–27 follow standardized top-view layout per STMicroelectronics DS10473 Rev 2 Figure 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB (Pin 1 & 27) | Thermal slug / case ground | Primary heat path to heatsink; must be electrically connected to system ground for safety and thermal performance |
| HSD (Pin 26) | High-side driver output | Open-collector NPN output rated 0.4 A; sinks current to drive external loads like relay coils or status LEDs |
| OUT1+ to OUT4− (Pins 4,6,9,10,17,19,21,23,24) | Quad bridge outputs | Eight terminals forming four fully independent BTL channels; each pair drives one speaker without shared ground constraints |
| VCC (Pins 7,20) | Main power supply inputs | Dual VCC pins reduce IR drop and improve current sharing under high-output conditions (e.g., 4 × 55 W @ 2 Ω) |
| SVR (Pin 11) | Supply voltage reference | Sets internal bias points (VCC/4), controls startup timing via external capacitor, and improves ripple rejection |
| MUTE (Pin 22) | Digital mute control input | Active-low TTL/CMOS-compatible input; requires RC filter (≤0.5 V/ms slew) to prevent click/pop during transitions |
| ST-BY (Pin 5) | Standby mode control | Active-high input (threshold 2.2 V); quiescent current drops to ≤2 µA when asserted, enabling ultra-low-power sleep |
Key Features
| Feature | Design Value |
|---|---|
| No external compensation required | Internally compensated for stability with 2 Ω loads - eliminates risk of oscillation and reduces BOM count by ≥3 passive components |
| Automute at low supply | Triggers muting when Vs falls below 4.5–5.5 V - prevents distortion and speaker damage during brown-out events |
| DC offset detection | Monitors differential output voltage; asserts OD pin if >±2.3 V - enables speaker protection against catastrophic failure |
| GSM noise immunity | 70 dB SVR @ 100 Hz + optimized layout - rejects pulsed RF interference from cellular modules without shielding |
| Fortuitous misconnection resilience | Withstands reversed battery, load dump (50 V), open GND, and inductive kickback - reduces need for external TVS/fuses |
Applications
| Automotive Head Unit Amplifier | OEM Infotainment System |
|---|---|
Use Scenario: 4-channel audio output stage in factory-installed car stereo with digital signal processor front-end. IC Role / Device Role / Timing Role: Final power stage delivering amplified analog signals to door/tweeter speakers; synchronized mute/standby with MCU-controlled boot sequence. Use Value: 2 Ω drive capability supports modern high-sensitivity speakers; low-voltage operation ensures uninterrupted playback during engine restart. |
Use Scenario: Integrated amplifier module in Tier-1 infotainment head unit supporting Android Auto and Apple CarPlay. IC Role / Device Role / Timing Role: Quad-channel Class AB amplifier with HSD pin driving status LEDs and relay-based antenna switching. Use Value: On-chip protections eliminate need for discrete overvoltage/overcurrent circuits; 26 dB fixed gain simplifies calibration and reduces firmware tuning effort. |
| Start-Stop Compatible Audio System | Hi-Fi Rear-Seat Entertainment |
Use Scenario: Audio subsystem in hybrid/electric vehicles where battery voltage dips to 6 V during engine-off phases. IC Role / Device Role / Timing Role: Primary amplifier maintaining audio continuity across 100–500 ms cranking transients; automute prevents clipping artifacts. Use Value: Confirmed operation at 6 V without pop/noise - meets OEM "silent cranking" requirements without external LDO support. |
Use Scenario: Dual-zone rear-seat entertainment system with independent volume control per channel. IC Role / Device Role / Timing Role: Four independent amplifiers driving left/right front and left/right rear speakers; OD pin monitors each channel for fault isolation. Use Value: 0.01 % THD+N at 4 W enables clean midrange reproduction; 60 dB crosstalk at 1 kHz prevents channel bleed in immersive audio playback. |
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 | Class AB, 4 × 41 W @ 14.4 V/4 Ω, no integrated HSD, requires external bootstrap capacitors | Lacks on-board high-side driver and low-voltage automute; needs additional protection ICs for load dump | Choose when cost sensitivity outweighs integration benefits and board space allows discrete HSD + protection circuitry |
| STA559BW | Digital input Class D, 4 × 70 W @ 14.4 V/2 Ω, integrated DSP, but higher EMI and requires LC output filters | Higher efficiency (≥85 %) but introduces switching noise; unsuitable for analog-source-only designs | Prefer for new designs prioritizing thermal efficiency and digital audio processing; avoid if analog input path and EMI control are mandatory |
Compared with TDA7388, STPA003HSD-48X reduces component count via integrated HSD and automute while improving low-voltage robustness; versus STA559BW, it avoids EMI filtering complexity and delivers lower THD in analog-domain systems requiring legacy signal chain compatibility.
Availability
STPA003HSD-48X is available at Aetrix Electronics and suitable for automotive head units, OEM infotainment systems, and start-stop compatible audio subsystems requiring stable component supply across extended production lifecycles.
Supply support for STPA003HSD-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, specializing in automotive, industrial, and power management solutions with broad IP portfolio and AEC-Q100 qualified product lines.
The STPA series targets high-reliability automotive audio applications, emphasizing robustness against battery transients, integrated protection, and seamless integration into OEM head unit architectures.
FAQ
What is the function of the HSD pin on STPA003HSD-48X?
The HSD (High-Side Driver) pin is an open-collector NPN output capable of sinking up to 0.4 A. It is used to drive external loads such as relay coils, status LEDs, or antenna switches. Its 0.25 V typical dropout enables efficient low-side switching without additional driver transistors, and it remains functional even during standby mode.
Can STPA003HSD-48X drive 2 Ω speakers reliably?
Yes - STPA003HSD-48X is explicitly rated for 2 Ω loads, delivering 4 × 85 W maximum and 4 × 55 W at 10 % THD with 14.4 V supply. Its MOSFET output stage, enhanced thermal design (1 °C/W Rth j-case), and protection against very inductive loads ensure safe continuous operation into 2 Ω without external current limiting.
How does the automute feature respond to supply voltage drops?
The automute function activates when supply voltage falls within 4.5–5.5 V (typ.), muting all four channels to prevent distorted output and speaker damage. This threshold is internally fixed and does not require external resistor dividers. Muting occurs before the amplifier enters undervoltage lockout, preserving signal integrity during transient brown-outs.
Is an external compensation capacitor required for stability?
No - STPA003HSD-48X is internally compensated for unity-gain stability across its full operating range, including 2 Ω loads and wide supply voltage (6–18 V). The datasheet confirms no external compensation or bootstrap capacitors are needed, reducing PCB area and eliminating tuning variables in production.
STPA003HSD-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, Short-Circuit and Thermal Protection, Standby
- Mounting Type:
- Through Hole
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 27-Flexiwatt (Vertical)
STPA003HSD-48X FAQ
1.How can I place an order for STPA003HSD-48X through Aetrix?
Please submit a Request for Quotation (RFQ) for STPA003HSD-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 STPA003HSD-48X reliable?
The price and inventory of STPA003HSD-48X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPA003HSD-48X is usually 5 days.
3.What payment methods are accepted for STPA003HSD-48X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPA003HSD-48X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPA003HSD-48X?
STPA003HSD-48X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPA003HSD-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 STPA003HSD-48X?
For technical support, including STPA003HSD-48X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPA003HSD-48X requirements.
6.How does Aetrix verify that STPA003HSD-48X is sourced from the original manufacturer or authorized distributors?
All STPA003HSD-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 STPA003HSD-48X meets industry standards.
7.What is the process for return or replacement of STPA003HSD-48X?
All STPA003HSD-48X units undergo pre-shipment inspection (PSI). If there is an issue with STPA003HSD-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 STPA003HSD-48X part is unused and in its original packaging.
Return procedure for STPA003HSD-48X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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