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STMicroelectronics STA32813TR
- Part No.:
- STA32813TR
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Special Purpose
- Package:
- 36-PowerBSSOP (0.433", 11.00mm Width)
- Datasheet:
-
STA32813TR.pdf
- Description:
- IC DAS 2.1CH HI EFF POWERSO36
- Quantity:
- Payment:
- Shipping:
Inventory:4,774
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Product details
Overview
STA32813TR from STMicroelectronics is a 2.1-channel, high-efficiency digital audio amplifier IC integrating DDX® Class-D power output stage, 24-bit digital audio processing, and I²C-controlled signal conditioning. It delivers up to 2 × 40 W + 1 × 80 W into 4 Ω at 21 V, supports 32–192 kHz sample rates, features four 28-bit biquad EQ filters per channel, and operates across 10–36 V supply for automotive and home theater subwoofer applications.
For engineers reviewing the STA32813TR datasheet, STA32813TR pinout, STA32813TR application, or STA32813TR equivalent, key selection considerations include its PowerSO-36 package thermal performance, configurable half-bridge output routing (2.1/2.0/mono), programmable limiter/compressor behavior, and AM noise-reduction mode compatibility with vehicle infotainment systems.
Technical Context
The STA32813TR implements a fully digital audio signal chain: I²S input feeds a 96 kHz internal processing core with 24–28-bit precision, followed by user-programmable biquad EQ, bass/treble tone control, dynamic range compression, and auto-mode presets. Its DDX® ternary PWM engine drives four independent half-bridges with variable dead time (10–20 ns) and RDS(on) of 200–270 mΩ per MOSFET pair.
Output configuration is register-controlled via Configuration Register F (0x05): OCFG[1:0] = 01 selects 2.1-channel mode (OUT1A/1B + OUT2A/2B as stereo full-bridges, combined OUT1/2 as mono full-bridge for subwoofer), supporting post-EQ mix and default 2.1 bass-management routing. Fault detection includes thermal warning (130 °C), shutdown (150 °C), and undervoltage lockout (7 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 2.1-channel digital audio system with three independent output stages |
| Output Power | 2 × 40 W + 1 × 80 W @ 4 Ω, 21 V (THD = 10%); enables compact 2.1 speaker systems without external amplifiers |
| SNR / Dynamic Range | 100 dB typical; ensures low-noise playback in quiet listening environments |
| Sample Rate Support | 32 kHz to 192 kHz; compatible with CD, DVD-Audio, and high-res streaming formats |
| Digital Gain Range | +48 dB to –80 dB in 0.5-dB steps; allows precise volume leveling across source types |
| EQ Processing | Four 28-bit biquads per channel; supports custom room correction and speaker response compensation |
| Control Interface | I²C (fast-mode, 400 kbit/s); enables host MCU integration with minimal GPIO overhead |
| Supply Voltage | 10 V to 36 V DC; suitable for 12 V automotive and wide-range industrial power rails |
Pinout & Package
STA32813TR uses the PowerSO-36 package with exposed thermal slug (up orientation), optimized for high-power dissipation in compact PCB layouts. The 36-pin layout separates analog, digital, power, and output domains to minimize noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1A, OUT1B, OUT2A, OUT2B (pins 16, 10, 9, 3) | Half-bridge PWM outputs | Drive speaker loads directly; configured as stereo full-bridges (CH1/CH2) and mono parallel (CH3) in 2.1 mode |
| VCC1A/VCC1B, VCC2A/VCC2B (pins 15, 11, 8, 4) | Power supply inputs for output stages | Accept 10–36 V DC; each pair powers one half-bridge leg; requires local bulk and ceramic decoupling |
| GND1A/GND1B, GND2A/GND2B (pins 13, 12, 7, 6) | Power ground returns | Separate return paths per half-bridge reduce ground bounce and EMI during switching |
| SDI, LRCKI, BICKI (pins 30, 31, 32) | I²S serial audio interface | Accept 16–24-bit PCM data; support left/right justified and MSB/LSB-first formats |
| SDA, SCL (pins 24, 23) | I²C control bus | Configure EQ, volume, limiters, AutoModes, and output routing without interrupting audio path |
| RESET (pin 22) | Asynchronous hardware reset | Forces all registers to defaults and clamps outputs low; essential for safe power-up sequencing |
| XTI, PLL_FILTER (pins 27, 26) | PLL clock input and loop filter | Accepts 12.288 MHz master clock (256×fs); external RC filter sets jitter performance and lock stability |
| SUB_GND, GND_CLEAN, GNDA (pins 1, 17, 28) | Ground domains | Isolate digital logic, analog circuitry, and substrate noise; mandatory for SNR > 100 dB |
Key Features
| Feature | Design Value |
|---|---|
| DDX® ternary PWM output | Reduces EMI vs binary PWM by spreading spectral energy; supports variable switching speed for optimal THD/frequency trade-off |
| AutoMode presets | 32 EQ curves, 15 crossover settings, and anti-clipping modes cut firmware development time by eliminating manual coefficient tuning |
| Dual independent limiters | Configurable attack/release thresholds per channel (registers 0x12–0x15); prevents speaker damage during transients without audible pumping |
| AM noise reduction | Shifts PWM carrier frequency away from AM radio band (530–1710 kHz); eliminates interference in car audio installations |
| Post-EQ mix with bass management | Default 2.1 routing sums L/R channels into subwoofer path below crossover point; configurable via register 0x11 and mix coefficients |
| Variable max power correction | Adjusts gain dynamically to maintain <1% THD at full output across supply voltage range (registers 0x27–0x28) |
Applications
| Automotive Infotainment | Home Theater Soundbar |
|---|---|
Use Scenario: Integrated amplifier in OEM head unit driving front speakers and active subwoofer. IC Role / Device Role / Timing Role: Digital audio processor and Class-D power stage; handles I²S input, EQ, bass management, and 2.1 output routing. Use Value: Eliminates need for separate DSP and power amp; AM noise-reduction mode prevents radio interference in vehicle cabin. | Use Scenario: Compact soundbar with built-in subwoofer output requiring high-fidelity 2.1 playback. IC Role / Device Role / Timing Role: Single-chip audio system-on-a-chip; processes PCM input, applies room EQ, and drives left/right/full-range and subwoofer channels. Use Value: Four 28-bit biquads enable precise speaker response correction; 100 dB SNR preserves detail in quiet passages. |
| Smart TV Audio System | Professional Monitor Amplifier |
Use Scenario: Slim TV design needing integrated 2.1 audio with low heat dissipation. IC Role / Device Role / Timing Role: Main audio controller; accepts HDMI ARC or SPDIF-to-I²S converted stream, applies loudness compensation and night mode. Use Value: Auto volume controlled loudness (AVCL) maintains consistent perceived volume across program content; 576×fs video sync mode ensures lip-sync accuracy. | Use Scenario: Studio monitor with active crossover and calibrated EQ for near-field listening. IC Role / Device Role / Timing Role: Precision digital signal conditioner and power driver; implements user-defined biquad filters and dual limiter protection. Use Value: 28-bit coefficient resolution enables steep, low-noise crossover slopes; individual channel bypass allows analog path verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2.1-channel digital audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TAS5634PHDR | 3-channel analog-input Class-D amplifier; no integrated DSP or I²C EQ; requires external microcontroller for configuration | Lacks AutoMode presets, biquad EQ, and AM noise reduction; suited for cost-sensitive designs with simple tone control only | Select when system already includes a dedicated DSP or when thermal constraints favor smaller package (HTSSOP-48 vs PowerSO-36) |
| MAX97220AETE+T | 2-channel Class-D with integrated boost converter; 24-bit processing but no 2.1 routing or subwoofer-specific limiter | No native 2.1 configuration; limited to stereo + optional mono sum; lacks programmable crossover and bass management | Choose for portable battery-powered systems where integrated boost and low quiescent current (<1 mA) outweigh multi-channel flexibility |
Compared with TAS5634PHDR and MAX97220AETE+T, STA32813TR uniquely integrates full 2.1 digital signal processing, DDX®-specific EMI mitigation, and factory-preset audio tuning-enabling faster time-to-market for automotive and premium consumer audio without external DSP firmware development.
Availability
STA32813TR is available at Aetrix Electronics and suitable for automotive infotainment systems, home theater soundbars, and smart TV audio subsystems requiring stable component supply and long-term lifecycle support.
Supply support for STA32813TR 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 strong analog and mixed-signal IP.
The STA328 product line targets high-efficiency, all-digital audio systems for space-constrained applications where integration of processing, control, and Class-D output reduces bill-of-materials and simplifies thermal design.
FAQ
What is the maximum operating junction temperature for STA32813TR?
The STA32813TR has a thermal shutdown threshold of 150 °C with 25 °C hysteresis, and a thermal warning flag activates at 130 °C. Its PowerSO-36 package achieves 2.5 °C/W junction-to-case thermal resistance when mounted on a 4-layer PCB with 400 mm² copper pour under the thermal slug, enabling continuous 80 W subwoofer output at 25 °C ambient with proper heatsinking.
Does STA32813TR support I²S input with 24-bit, 192 kHz sample rate?
Yes. STA32813TR accepts I²S-format PCM data at sample rates from 32 kHz to 192 kHz with word lengths up to 24 bits. The internal processing runs at 96 kHz with 24–28-bit precision, and the DDX® modulator maintains >100 dB SNR even at 192 kHz input due to oversampling and noise-shaping architecture.
How is the 2.1-channel output configured in hardware or software?
2.1-channel operation is configured exclusively via I²C register writes-not hardware strapping. Setting OCFG[1:0] = 01 in Configuration Register F (address 0x05) routes OUT1A/1B and OUT2A/2B as stereo full-bridges while combining both for mono subwoofer drive. Bass management and crossover are implemented digitally in the post-EQ mixer using default coefficients stored in register 0x11.
Can STA32813TR be used without an external microcontroller?
No. STA32813TR requires I²C initialization to configure output mode, volume, EQ, and limiters before audio playback. It has no autonomous boot sequence or EEPROM storage. However, AutoMode presets (e.g., preset EQ curves, anti-clipping modes) reduce firmware complexity-only basic I²C commands are needed to activate them after power-up.
STA32813TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 36-PowerBSSOP (0.433", 11.00mm Width)
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Function:
- -
- Applications:
- -
- Number of Channels:
- -
- Interface:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Specifications:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
STA32813TR FAQ
1.How can I place an order for STA32813TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STA32813TR 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 STA32813TR reliable?
The price and inventory of STA32813TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA32813TR is usually 5 days.
3.What payment methods are accepted for STA32813TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA32813TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STA32813TR?
STA32813TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STA32813TR 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 STA32813TR?
For technical support, including STA32813TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA32813TR requirements.
6.How does Aetrix verify that STA32813TR is sourced from the original manufacturer or authorized distributors?
All STA32813TR 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 STA32813TR meets industry standards.
7.What is the process for return or replacement of STA32813TR?
All STA32813TR units undergo pre-shipment inspection (PSI). If there is an issue with STA32813TR, 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 STA32813TR part is unused and in its original packaging.
Return procedure for STA32813TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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