My Inquiry
My Account
STMicroelectronics STPA003CD-48X
- Part No.:
- STPA003CD-48X
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- 27-Flexiwatt, Formed Leads
- Datasheet:
-
STPA003CD-48X.pdf
- Description:
- IC AMP AB QUAD 85W 27FLEXIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:1,949
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STPA003CD-48X from STMicroelectronics is a quad-channel Class AB audio power amplifier in Flexiwatt27 package, designed for automotive head units with integrated high-side driver and clipping diagnostics. It delivers up to 55 W per channel into 2 Ω at 14.4 V (10% THD), operates down to 6 V for start-stop battery profiles, and features on-chip DC offset detection, automute, and robust protection against load dump, reversed battery, and thermal overload.
For engineers reviewing the STPA003CD-48X datasheet, STPA003CD-48X pinout, STPA003CD-48X application, or STPA003CD-48X equivalent, key selection criteria include its 2 Ω drive capability, 26 dB fixed gain, CD-DIAG pin for real-time clipping feedback, low-voltage operation stability, and integrated protections eliminating external bootstrap or compensation components.
Technical Context
The STPA003CD-48X implements four independent MOSFET-based Class AB output stages with shared power grounds (PW-GND) and dual supply rails (VCC pins 7 & 21). Its SVR pin establishes internal bias references (VCC/4), enables pop-noise-free startup/shutdown via external capacitor timing, and enhances supply ripple rejection by >70 dB at 100 Hz.
Control logic integrates dual-level mute (AM attenuation ≥80 dB) and standby (ISB ≤2 µA), with automute triggered at VS < 4.5 V. The CD-DIAG pin (Pin 26) provides open-collector clipping indication at THD ≥1%, enabling real-time audio integrity monitoring without external comparators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 55 W/ch into 2 Ω @ 14.4 V, 1 kHz, 10% THD - supports high-SPL mid-bass drivers without external heatsink derating |
| Supply Range | 6–18 V DC - sustains full audio playback during engine cranking (≥6 V) and load dump transients (≤50 V pk/50 ms) |
| Fixed Gain | 26 dB ±0.5 dB - eliminates external gain-setting resistors and ensures channel-to-channel matching within ±1 dB |
| THD+N | 0.01% typ. @ 4 W, 4 Ω - meets Hi-Fi distortion requirements for front-stage amplification in premium car audio |
| SVR | 70 dB min. @ 100 Hz - suppresses alternator ripple without LC filters, reducing BOM cost and PCB area |
| CD-DIAG Threshold | 1% THD activation - provides precise clipping onset detection for DSP-based dynamic range control |
| Rth j-case | 1 °C/W max. - enables direct slug-to-heatsink mounting for thermal management in compact enclosures |
Pinout & Package
STPA003CD-48X uses the Flexiwatt27 vertical package (27-pin, slug-down), with thermal slug (TAB) electrically connected to PW-GND. Pin 26 is dedicated to CD-DIAG functionality (open-collector output), distinguishing it from OD/HSD variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 27 | TAB | Thermal slug tied to PW-GND - primary heat path to heatsink; requires soldered thermal pad contact |
| 2 | OD/HSD | Offset detector or high-side driver output - not used in CD variant; left unconnected |
| 3, 8, 18, 24 | PW-GND1–4 | Per-channel power ground returns - minimizes crosstalk by separating current paths for each amplifier |
| 4, 6, 10, 19, 21, 23 | OUTx±, OUT4±, MUTE | Differential speaker outputs + mute control - supports bridged-tied-load (BTL) configuration per channel |
| 5, 22 | ST-BY, VCC | Standby enable and dual VCC inputs - allows independent rail sequencing and fault-isolated power domains |
| 11–12, 15–16 | IN1–IN4 | High-impedance (55 kΩ typ.) ground-referenced inputs - accepts line-level signals without level-shifting circuitry |
| 26 | CD-DIAG | Clipping diagnostic open-collector output - sinks current when THD ≥1%, enabling microcontroller-triggered gain reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CD-DIAG pin | Real-time clipping detection at 1% THD threshold enables adaptive DSP gain control without external comparators or ADC sampling |
| 2 Ω load drive capability | Delivers 55 W/ch into 2 Ω loads at 14.4 V - supports high-current subwoofer and midrange drivers in space-constrained automotive modules |
| Automute at low voltage | Mutes amplifier when supply drops below 4.5–5.5 V - prevents audible distortion during engine cranking and maintains signal integrity |
| No external compensation | Internally compensated design eliminates need for external phase-compensation capacitors - reduces BOM count and layout sensitivity |
| Robust misconnection protection | Withstands reversed battery, load dump (50 V/50 ms), and GND open faults - meets OEM AEC-Q100 stress requirements without add-on TVS |
Applications
| Automotive Head Unit Amplifier | Start-Stop Compatible Infotainment |
|---|---|
|
Use Scenario: 4-channel OEM car radio with digital signal processing and speaker protection algorithms. IC Role / Device Role / Timing Role: Primary audio power stage delivering full-range output to front/rear speakers with real-time clipping feedback to DSP. Use Value: CD-DIAG pin enables closed-loop gain adjustment before audible distortion occurs, extending speaker lifespan and improving perceived loudness. |
Use Scenario: Compact infotainment system in hybrid vehicles requiring uninterrupted audio during engine stop/start cycles. IC Role / Device Role / Timing Role: Quad amplifier maintaining playback continuity down to 6 V supply while suppressing pop noise via SVR-controlled soft-start. Use Value: Low-voltage operation and automute prevent audio dropouts and transient artifacts during 12 V battery transitions typical of start-stop systems. |
| Hi-Fi Automotive Audio Module | Protected Mid-Range Power Stage |
|
Use Scenario: Premium audio upgrade module with THD-sensitive tweeter/midrange drivers. IC Role / Device Role / Timing Role: High-fidelity Class AB amplifier providing 0.01% THD+N at 4 W into 4 Ω with ultra-low output noise (40 µV A-weighted). Use Value: Hi-Fi distortion performance and 70 dB SVR eliminate need for post-amplifier filtering, preserving signal integrity in critical listening positions. |
Use Scenario: Mid-power amplifier stage driving 2 Ω coaxial speakers in entry-level vehicle platforms. IC Role / Device Role / Timing Role: Robust 2 Ω-capable output stage with integrated short-circuit, overtemperature, and DC offset protection. Use Value: On-die protections replace discrete protection ICs and sense resistors, reducing component count by ≥7 parts per channel and improving field reliability. |
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 |
|---|---|---|---|
| TAS5414QPHPRQ1 | Class D, 45 W/ch into 2 Ω, 90% efficiency, no CD-DIAG pin | Better thermal performance in sealed enclosures but higher EMI requiring ferrite filters | Select for efficiency-critical designs where board space permits EMI mitigation; avoid if analog clipping feedback is required |
| TPA6205A1QDGQRQ1 | Class AB, 2.1 W/ch into 8 Ω, SOIC-8, no diagnostics or 2 Ω drive | Limited to low-power rear-seat entertainment; lacks automotive-grade protections | Use only for auxiliary audio zones with non-critical reliability; insufficient for main head unit amplification |
Compared with TAS5414QPHPRQ1 and TPA6205A1QDGQRQ1, the STPA003CD-48X uniquely combines Class AB fidelity, 2 Ω drive, CD-DIAG diagnostics, and comprehensive automotive protections in a single Flexiwatt27 package-enabling simplified, high-reliability head unit designs without trade-offs in audio quality or system robustness.
Availability
STPA003CD-48X is available at Aetrix Electronics and suitable for automotive infotainment systems, start-stop compatible head units, and premium car audio modules requiring stable component supply across extended temperature ranges (-40°C to +105°C) and long production lifecycles.
Supply support for STPA003CD-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 solutions with broad AEC-Q100 qualification coverage.
The STPA series targets high-reliability automotive audio applications, emphasizing robustness against battery transients, low-voltage operation, and integration of diagnostics to reduce system-level complexity in modern infotainment architectures.
FAQ
What is the function of the CD-DIAG pin on STPA003CD-48X?
The CD-DIAG pin (Pin 26) is an open-collector output that asserts low when total harmonic distortion exceeds 1% at the output. It enables real-time clipping detection without external circuitry, allowing microcontrollers to dynamically adjust DSP gain or trigger visual/audio alerts. Its saturation voltage is ≤0.4 V at 1 mA sink current, ensuring clean logic-level interfacing.
Can STPA003CD-48X operate safely with a 2 Ω speaker load?
Yes-STPA003CD-48X is fully rated for continuous 2 Ω operation, delivering 55 W per channel at 14.4 V (10% THD) and 40 W at 1% THD. Its MOSFET output stage, integrated thermal limiter, and short-circuit protection (to GND, Vs, and across loads) ensure safe operation without external current-sensing or foldback circuits.
How does the SVR pin improve audio performance?
The SVR pin sets internal bias points (VCC/4), controls startup/shutdown timing via external capacitor, and enhances supply ripple rejection (>70 dB at 100 Hz). A minimum 10 µF capacitor on SVR ensures pop-noise-free transitions; the internal 3 kΩ/100 kΩ resistor switching enables fast initial charge to VCC/4, reducing mute-to-audio delay to <100 ms.
What protection features are integrated into STPA003CD-48X?
STPA003CD-48X integrates eight protection mechanisms: output short-circuit to GND/Vs/across load, very inductive load tolerance, soft thermal limiting (150°C junction max), DC offset detection (±2.3 V threshold), load dump survival (50 V/50 ms), fortuitous open GND, reversed battery immunity, and ESD protection per AEC-Q100. No external protection components are required.
STPA003CD-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)
STPA003CD-48X FAQ
1.How can I place an order for STPA003CD-48X through Aetrix?
Please submit a Request for Quotation (RFQ) for STPA003CD-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 STPA003CD-48X reliable?
The price and inventory of STPA003CD-48X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPA003CD-48X is usually 5 days.
3.What payment methods are accepted for STPA003CD-48X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPA003CD-48X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STPA003CD-48X?
STPA003CD-48X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STPA003CD-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 STPA003CD-48X?
For technical support, including STPA003CD-48X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPA003CD-48X requirements.
6.How does Aetrix verify that STPA003CD-48X is sourced from the original manufacturer or authorized distributors?
All STPA003CD-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 STPA003CD-48X meets industry standards.
7.What is the process for return or replacement of STPA003CD-48X?
All STPA003CD-48X units undergo pre-shipment inspection (PSI). If there is an issue with STPA003CD-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 STPA003CD-48X part is unused and in its original packaging.
Return procedure for STPA003CD-48X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STPA003CD-48X Tags
-Exposed-Pad.jpg)
-
TS34119CS RLG
Taiwan Semiconductor Corporation
-
LM386MX-1/NOPB
Texas Instruments
-
TPA711DGNR
Texas Instruments
-
LM386N-4/NOPB
Texas Instruments
-
TS4990IST
STMicroelectronics
-
PAM8302AASCR
Diodes Incorporated
-
TPA6130A2RTJR
Texas Instruments
-
TPA6111A2DGNR
Texas Instruments
-
LM4861MX/NOPB
Texas Instruments
-
LM386M-1/NOPB
Texas Instruments
-
NCS2211DR2G
onsemi
-
IS31AP2005-DLS2-TR
Lumissil Microsystems
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
