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STMicroelectronics TDA7297SA
- Part No.:
- TDA7297SA
- Manufacturer:
- STMicroelectronics
- Category:
- Audio Amplifiers
- Package:
- Clipwatt-15 (Vertical, Bent and Staggered Leads)
- Datasheet:
-
TDA7297SA.pdf
- Description:
- IC AMP AB STEREO 10W 15CLIPWATT
- Quantity:
- Payment:
- Shipping:
Inventory:2,557
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Product details
Overview
TDA7297SA from STMicroelectronics is a dual bridge audio power amplifier IC designed for TV and portable radio systems, delivering 10W+10W into 8Ω loads at 13V supply, with internally fixed 32dB gain, stand-by/mute control, and thermal/short-circuit protection.
For engineers reviewing the TDA7297SA datasheet, TDA7297SA pinout, TDA7297SA application, or TDA7297SA equivalent, key selection criteria include its 6–18V wide supply range, no-external-bootstrap operation, 60–80dB mute attenuation, 150°C thermal shutdown threshold, and compatibility with legacy TDA7266-series layouts.
Technical Context
The TDA7297SA integrates two fully independent Class-AB bridge-tied-load (BTL) amplifier channels in a single monolithic BI20II process. Each channel features internal biasing, fixed closed-loop gain (32dB), and dedicated ST-BY and MUTE pins with defined voltage thresholds (0.8–1.8V and 2.3–4.1V respectively).
It operates without external bootstrap capacitors or Boucherot cells, relying on internal charge pumps and rail-to-rail output stage design. Thermal protection activates at ~150°C junction temperature, and short-circuit current is internally limited to 2A peak per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 10W per channel into 8Ω @ THD = 10%, VCC = 13V - enables full-range audio playback in compact TV and portable speakers |
| Supply Voltage Range | 6.5V to 18V - supports battery-powered (e.g., 2×AA/AAA) and regulated DC supplies in consumer electronics |
| THD+N | 0.1–0.3% @ 1W, 1kHz - ensures low-distortion mid-power audio reproduction without external feedback tuning |
| Mute Attenuation | 60–80dB - suppresses speaker pop-noise during power sequencing when driven by µP-controlled delay circuits |
| Thermal Shutdown Threshold | 150°C junction temperature - protects device under sustained high-power or poor heatsinking conditions |
| Quiescent Current | 50–65mA @ VCC = 13V, RL = ∞ - defines standby power draw for system-level energy budgeting |
| Voltage Gain Matching | ±0.5dB between channels - maintains balanced stereo imaging without post-amplifier trimming |
Pinout & Package
The TDA7297SA is housed in a 15-pin Clipwatt15 package (vertical mounting, heatsink-compatible plastic SIP), with exposed metal tab for thermal conduction. Pin numbering follows top-view layout with pins 1–15 left-to-right across two rows.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 5, 10, 11 | No Connect | Internally unused; must remain unconnected to avoid parasitic coupling or latch-up |
| 4 | Vref | Internal reference voltage node - not user-accessible; decoupling not required |
| 6 | MUTE | Digital input: <2.3V = active mute (≥60dB attenuation); >4.1V = normal operation |
| 7 | ST-BY | Digital input: <0.8V = standby (quiescent mode); >1.8V = enabled amplifier core |
| 8, 9 | S-GND / PW-GND | Separate signal and power ground returns - routing isolation prevents ground bounce in BTL outputs |
| 12, 13 | IN2 / IN1 | Differential-capable inputs - AC-coupled via 0.22µF; 30kΩ input impedance sets RC time constant with µP interface |
| 14, 15 | OUT2+/OUT2− / OUT1+/OUT1− | BTL output pairs - deliver ±12.6V swing into 8Ω (10W), requiring no output coupling capacitor |
| 13 (repeated) | VCC | Main supply pin - accepts 6.5–18V; requires 470µF bulk + 100nF ceramic local decoupling |
Key Features
| Feature | Design Value |
|---|---|
| No external bootstrap capacitor | Eliminates 2× high-voltage ceramic caps (typically 1–2µF/25V) per channel, reducing BOM count and PCB area |
| Internally fixed 32dB gain | Removes need for external gain-setting resistors, ensuring consistent channel matching and eliminating drift-related calibration |
| Independent ST-BY and MUTE controls | Enables precise µP-driven sequencing (e.g., 150ms ST-BY rise before MUTE release) to eliminate turn-on/turn-off pop noise |
| Integrated thermal overload protection | Auto-recovery shutdown at ~150°C junction temperature prevents permanent damage during transient overloads or heatsink failure |
| Short-circuit protected outputs | 2A peak current limit per channel avoids latch-up during speaker wire shorts or accidental grounding of BTL outputs |
Applications
| Flat-Panel TV Audio Amplification | Portable AM/FM Radio Output Stage |
|---|---|
|
Use Scenario: Driving 8Ω stereo speakers in space-constrained 22–32″ LCD/LED TVs with 12V rail supply. IC Role / Device Role / Timing Role: Dual BTL audio power amplifier providing direct-coupled 10W/channel output without output capacitors. Use Value: Eliminates bulky output coupling caps and reduces total solution size by >25% versus discrete amplifier designs. |
Use Scenario: Final-stage amplification in battery-operated portable radios using 6–9V alkaline packs. IC Role / Device Role / Timing Role: Low-quiescent-current (65mA) dual amplifier enabling >10-hour playback while supporting mute/standby sequencing. Use Value: 6.5V minimum operating voltage extends usable battery life down to near-dead cell voltage. |
| Set-Top Box Audio Output | Compact Docking Station Speaker Driver |
|
Use Scenario: Stereo audio boost in HDMI/AV set-top boxes where EMI-sensitive digital circuitry shares PCB with analog stages. IC Role / Device Role / Timing Role: Electrically isolated dual-channel amplifier with separate S-GND/PW-GND pins minimizing digital noise coupling. Use Value: 56dB supply rejection and 60dB crosstalk isolation preserve SNR in mixed-signal environments. |
Use Scenario: Embedded audio driver in USB-C docking stations powering integrated stereo speakers. IC Role / Device Role / Timing Role: Standby-enabled amplifier synchronized to host USB PD negotiation and system wake/sleep states. Use Value: ST-BY pin allows full system power-down (50mA quiescent) while retaining fast (<200ms) resume capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual BTL audio amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDA7266SA | Identical pinout and electrical specs; same BI20II process but earlier revision - lacks updated thermal derating curve documentation | Valid drop-in replacement in legacy TV designs; not recommended for new thermal margin-critical layouts | Select only if existing board layout and qualification data strictly require TDA7266SA footprint compliance |
| TPA3110D2 | Class-D architecture; 15W/channel, higher efficiency (85% vs 60%), but requires external LC filter and has higher EMI | Suitable for battery-powered devices needing longer runtime; unsuitable for noise-sensitive analog boards without shielding | Choose when >30% efficiency gain justifies added filter components and layout complexity |
Compared with TDA7297SA, TDA7266SA offers identical functionality with minor thermal model differences, while TPA3110D2 trades analog simplicity for efficiency and thermal headroom - making the former ideal for cost- and layout-constrained replacements, and the latter for power-limited portable systems.
Availability
TDA7297SA is available at Aetrix Electronics and suitable for flat-panel TV audio subsystems, portable radio final-stage amplification, and set-top box speaker drivers requiring stable component supply and long-term industrial availability.
Supply support for TDA7297SA 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.
The TDA7297SA belongs to ST's legacy audio power amplifier product line, engineered specifically for cost-sensitive, space-constrained consumer audio applications requiring robust thermal behavior and minimal external components.
FAQ
What is the minimum supply voltage required for full 10W output?
The TDA7297SA delivers 10W per channel into 8Ω at VCC ≥ 12.5V. At 6.5V minimum rated supply, output power drops to ~1.2W/channel (THD = 10%). Full-rated power requires ≥12.5V to ensure sufficient headroom for 12.6V peak output swing.
Can the TDA7297SA drive 4Ω speakers?
Yes - the device supports 4Ω loads with derated output power: 13W per channel at THD = 10% and VCC = 13V. However, total dissipation rises significantly; heatsink thermal resistance must be ≤5.0°C/W to avoid thermal shutdown under continuous operation.
Is external compensation required for stability?
No - the TDA7297SA uses internal frequency compensation optimized for unity-gain-stable BTL operation with standard 8Ω loads and recommended PCB layout. No external compensation network is specified or required in the datasheet.
How does the ST-BY pin differ from the MUTE pin in functional behavior?
ST-BY disables the entire amplifier core (reducing Iq to ~100µA), while MUTE only blanks the output stage (Iq remains at 65mA). ST-BY must be asserted before MUTE during power-down to prevent pop-noise; sequence reversal causes audible transients.
TDA7297SA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- Clipwatt-15 (Vertical, Bent and Staggered Leads)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Class AB
- Output Type:
- 2-Channel (Stereo)
- Max Output Power x Channels @ Load:
- 10W x 2 @ 8Ohm
- Voltage - Supply:
- 6.5V ~ 18V
- Features:
- Mute, Short-Circuit and Thermal Protection, Standby
- Mounting Type:
- Through Hole
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 15-Clipwatt
TDA7297SA FAQ
1.How can I place an order for TDA7297SA through Aetrix?
Please submit a Request for Quotation (RFQ) for TDA7297SA 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 TDA7297SA reliable?
The price and inventory of TDA7297SA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDA7297SA is usually 5 days.
3.What payment methods are accepted for TDA7297SA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDA7297SA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDA7297SA?
TDA7297SA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDA7297SA 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 TDA7297SA?
For technical support, including TDA7297SA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDA7297SA requirements.
6.How does Aetrix verify that TDA7297SA is sourced from the original manufacturer or authorized distributors?
All TDA7297SA 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 TDA7297SA meets industry standards.
7.What is the process for return or replacement of TDA7297SA?
All TDA7297SA units undergo pre-shipment inspection (PSI). If there is an issue with TDA7297SA, 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 TDA7297SA part is unused and in its original packaging.
Return procedure for TDA7297SA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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