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STMicroelectronics TDA7294HS
- Part No.:
- TDA7294HS
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- Multiwatt-15 (Horizontal, Bent and Staggered Leads)
- Datasheet:
-
TDA7294HS.pdf
- Description:
- IC AMP AB MONO 100W 15MULTIWATT
- Quantity:
- Payment:
- Shipping:
Inventory:2,424
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Product details
Overview
TDA7294HS from STMicroelectronics is a monolithic Class AB audio power amplifier IC in Multiwatt15H package, designed for high-fidelity audio output stages in home stereo, self-powered loudspeakers, and premium TV systems. It delivers up to 100 W music power into 4 Ω or 8 Ω loads, operates from ±40 V supply, features integrated DMOS power stage, and includes independent mute and stand-by functions with CMOS-compatible control inputs.
For engineers reviewing the TDA7294HS datasheet, TDA7294HS pinout, TDA7294HS application, or TDA7294HS equivalent, key selection considerations include its ±40 V operating voltage range, 10 A peak output current capability, 0.005% THD at 5 W/1 kHz, 70 dB typical mute attenuation, and thermal shutdown activation at 145 °C - all critical for robust Hi-Fi amplifier design and thermal management.
Technical Context
The TDA7294HS integrates a DMOS unity-gain output buffer with local linearizing feedback and Miller compensation to minimize crossover distortion and maintain wideband stability. Its dual-supply architecture separates signal and power rails (pins 13/15 for +PWVs, pins 1/7 for ±Vs), enabling high-efficiency bootstrapped operation in enhanced-class-AB configurations.
Protection is implemented via dynamic SOA monitoring combined with local temperature sensing: thermal shutdown initiates muting at 145 °C and full stand-by at 150 °C, while short-circuit protection responds to sustained overcurrent without requiring external Boucherot cells.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±10 V to ±40 V - supports wide-rail operation with high PSRR (75 dB @ 100 Hz) for noisy supply environments |
| Output Power (RMS) | 60 W @ ±35 V/8 Ω - continuous power delivery meeting IEC 268-3 music power standards |
| Total Harmonic Distortion | 0.005% @ 5 W/1 kHz - ultra-low distortion enables high-fidelity reproduction without external correction |
| Slew Rate | 7 V/μs (typ.) - ensures faithful transient response for dynamic audio signals up to 20 kHz |
| Mute Attenuation | 60–80 dB - suppresses turn-on/off pop noise and enables silent remote control sequencing |
| Thermal Shutdown Threshold | 145 °C (mute), 150 °C (stand-by) - staged protection prevents latch-up and allows graceful recovery |
| Junction-to-Case Thermal Resistance | 1.5 °C/W - defines minimum heatsink requirement for sustained 60 W output in 70 °C ambient |
Pinout & Package
Multiwatt15H is a 15-pin vertical-mount SIP package with integrated heat sink tab electrically connected to pin 7 (−Vs). The package features staggered lead pitch (2.54 mm), 18.0 mm body length, and 20.2 mm height - optimized for forced-air or chassis-mounted heatsinking in high-power audio modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | −Vs (Power Supply) | Main negative supply rail for power stage; tab connection point for thermal path |
| 2 | IN− (Inverting Input) | Differential input node; referenced to ground or −Vs for single-ended configuration |
| 3 | IN+ (Non-inverting Input) | Primary audio input; high-impedance (100 kΩ) node with ±10 mV offset |
| 4 | VM (Mute Control) | CMOS-compatible mute enable: <1.5 V = muted, >3.5 V = active; 60–80 dB suppression |
| 6 | STBY (Stand-by Control) | CMOS-compatible stand-by enable: <1.5 V = stand-by, >3.5 V = operational; 70–90 dB attenuation |
| 7 | −PWVs (Power Stage −Vs) | Dedicated negative supply for DMOS output stage; isolated from signal −Vs to reduce crosstalk |
| 8 | OUT (Output) | Class AB amplified output; capable of ±10 A peak current into reactive loads |
| 9 | VSTBY (Stand-by Reference) | Reference node for stand-by threshold detection; configurable to GND or −Vs |
| 10 | VMUTE (Mute Reference) | Reference node for mute threshold detection; configurable to GND or −Vs |
| 13 | +PWVs (Power Stage +Vs) | Dedicated positive supply for DMOS output stage; enables bootstrapped high-efficiency mode |
| 14 | +Vs (Signal +Vs) | Positive supply for input and driver stages; decoupled from +PWVs for noise isolation |
| 15 | BOOT− (Bootstrap Return) | Return path for bootstrap capacitor in high-efficiency configurations; ties to +PWVs during swing |
Key Features
| Feature | Design Value |
|---|---|
| DMOS Power Stage | Eliminates second breakdown risk, enabling safe operation into 4 Ω reactive loads without SOA derating |
| No Switch-On/Off Noise | Integrated mute/stand-by sequencing with internal turn-on delay avoids audible transients |
| High Supply Voltage Rejection | 75 dB @ 100 Hz - maintains clean output despite poor regulation in ±40 V supplies |
| Independent Mute & Stand-by | Separate CMOS logic inputs allow flexible system-level power management and remote control |
| Thermal Protection Architecture | Two-stage shutdown (mute → stand-by) preserves signal integrity while preventing junction damage |
Applications
| Home Stereo Amplifiers | Self-Powered Loudspeakers |
|---|---|
|
Use Scenario: Dual-channel 60 W RMS per channel amplifier driving 4–8 Ω bookshelf or floor-standing speakers in compact enclosures. IC Role / Device Role / Timing Role: Primary Class AB output stage delivering low-distortion audio with integrated mute/stand-by for remote volume and power control. Use Value: Eliminates need for discrete MOSFET output stages and external protection circuits, reducing BOM count by 12+ components. |
Use Scenario: Integrated bass/midrange amplifier module inside active studio monitors or Bluetooth speakers with analog line-in. IC Role / Device Role / Timing Role: High-current output driver handling transient peaks up to 100 W music power while maintaining thermal stability. Use Value: Enables single-chip 100 W solution with built-in thermal shutdown and no external Boucherot cell required. |
| Premium TV Audio Systems | Hi-Fi Subwoofer Modules |
|
Use Scenario: Embedded 2.1-channel soundbar amplifier where space and EMI are constrained, requiring minimal external passives. IC Role / Device Role / Timing Role: Final-stage audio amplifier with 7 V/μs slew rate ensuring accurate reproduction of bass transients and dialogue clarity. Use Value: Delivers 0.005% THD at 5 W - meets broadcast-grade audio fidelity requirements without post-filtering. |
Use Scenario: Bridge-tied load (BTL) subwoofer amplifier using two TDA7294HS devices to drive 8–16 Ω passive radiators. IC Role / Device Role / Timing Role: One half of BTL pair providing phase-inverted output; synchronized mute/stand-by prevents DC offset at speaker terminals. Use Value: Achieves 150 W into 8 Ω at ±25 V supply - reduces transformer size and improves efficiency vs. single-ended designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-power audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7293V | Same Multiwatt15V package; lower max supply (±35 V); 70 W music power; no dedicated +PWVs/+Vs separation | Limited to ≤60 W RMS into 8 Ω; unsuitable for bootstrapped high-efficiency or bridge configurations | Select when board space requires horizontal-mount package and supply rails stay ≤±35 V |
| LM3886TF | TO-220 package; ±35 V max; 68 W RMS into 8 Ω; no integrated mute/stand-by; requires external thermal foldback | Needs discrete logic for remote control; higher PCB area; lacks TDA7294HS's staged thermal protection | Choose for cost-sensitive consumer audio where mute/stand-by are handled externally |
Compared with TDA7293V and LM3886TF, the TDA7294HS provides superior supply voltage headroom (±40 V), dedicated power/signal rail separation for reduced crosstalk, and integrated dual-mode protection - making it optimal for compact, high-reliability Hi-Fi amplifiers demanding remote controllability and thermal resilience.
Availability
TDA7294HS is available at Aetrix Electronics and suitable for home stereo amplifiers, self-powered loudspeakers, and premium TV audio systems requiring stable component supply across multi-year production cycles.
Supply support for TDA7294HS 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 analog, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The TDA7294HS belongs to ST's high-voltage audio amplifier product line, engineered specifically for high-fidelity, high-power Class AB applications where reliability, low distortion, and integrated system-level features (mute, stand-by, thermal protection) are mandatory.
FAQ
What is the maximum continuous output power of the TDA7294HS into 4 Ω?
The TDA7294HS delivers 60 W RMS continuous output power into a 4 Ω load at ±31 V supply, with total harmonic distortion ≤0.1% across 20 Hz–20 kHz. This rating is validated per IEC 268-3 under standard test conditions (Tamb = 25 °C, Rg = 50 Ω), and assumes adequate heatsinking to maintain junction temperature below 145 °C.
Can the TDA7294HS be used in bridge-tied load (BTL) configuration?
Yes - the TDA7294HS supports BTL operation using two identical devices, one configured with inverted input. The datasheet specifies 150 W maximum output into 8 Ω at ±25 V supply in this mode. Critical design requirements include matched external components, synchronized mute/stand-by control, and minimum 8 Ω load impedance to prevent excessive current stress on the DMOS output stage.
How does the thermal shutdown function operate?
The TDA7294HS implements two-stage thermal protection: at 145 °C junction temperature, it activates muting (≥60 dB attenuation) while remaining powered; at 150 °C, it enters full stand-by mode (≥70 dB attenuation) and reduces quiescent current to 1–3 mA. Both thresholds are monitored via on-die temperature sensors, and recovery occurs automatically once junction temperature falls below hysteresis limits (140 °C for mute, 145 °C for stand-by).
Is external compensation required for stability?
No external compensation is required for standard operation. The TDA7294HS incorporates internal Miller compensation optimized for unity-gain stability with capacitive loads up to 100 nF. However, the datasheet recommends adding a 100 nF ceramic capacitor between pins 9 (VSTBY) and 1 (−Vs) when using the stand-by function, and a 100 nF capacitor between pins 10 (VMUTE) and 1 (−Vs) for mute function - both serve as noise filtering, not compensation.
TDA7294HS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- Multiwatt-15 (Horizontal, Bent and Staggered Leads)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Class AB
- Output Type:
- 1-Channel (Mono)
- Max Output Power x Channels @ Load:
- 100W x 1 @ 8Ohm
- Voltage - Supply:
- ±10V ~ 40V
- Features:
- Depop, Mute, Short-Circuit and Thermal Protection, Standby
- Mounting Type:
- Through Hole
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 15-Multiwatt
TDA7294HS FAQ
1.How can I place an order for TDA7294HS through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7294HS 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 TDA7294HS reliable?
The price and inventory of TDA7294HS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7294HS is usually 5 days.
3.What payment methods are accepted for TDA7294HS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7294HS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7294HS?
TDA7294HS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7294HS 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 TDA7294HS?
For technical support, including TDA7294HS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7294HS requirements.
6.How does Aetrix verify that TDA7294HS is sourced from the original manufacturer or authorized distributors?
All TDA7294HS 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 TDA7294HS meets industry standards.
7.What is the process for return or replacement of TDA7294HS?
All TDA7294HS units undergo pre-shipment inspection (PSI). If there is an issue with TDA7294HS, 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 TDA7294HS part is unused and in its original packaging.
Return procedure for TDA7294HS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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