TDA7297 - 15W+15W Dual Bridge Amplifier | STMicroelectronics
部品番号: TDA7297 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.45 | $24.50 |
| 100 | $2.05 | $205.00 |
| 500 | $1.78 | $890.00 |
| 1,000 | $1.55 | $1,550.00 |
TDA7297 概要
A Class-AB (dual bridge) audio amplifier is a topology that combines two push-pull output stages in a bridge-tied-load (BTL) configuration, allowing higher output swing across a speaker load without large DC-blocking capacitors. The TDA7297 belongs to the broader category of integrated audio power amplifiers, which sit within the analog signal chain and power management domains in a typical consumer electronics design. Dual-bridge configurations are especially valued in compact consumer devices because they double the voltage swing across the speaker and remove the need for a bulky output coupling capacitor.
Key features include 15W per channel continuous output into 8 ohm loads, low standby current with a dedicated Standby pin, and a Mute function for click-free power-up sequencing. The device integrates all output transistors in the same silicon die and requires only a few external resistors and a power supply bypass network, enabling very compact PCB designs. Typical THD at 1W output is in the 0.1%-0.5% range, making it suitable for entry-level TV audio, multimedia monitors, and portable boombox designs.
The internally fixed gain topology simplifies board layout but limits design flexibility compared to externally adjustable amplifiers like the TDA7294. Thermal performance is handled through the Multiwatt-15 package, which exposes the die tab to a vertical heatsink profile with through-hole pins for robust mechanical mounting. Designers must still respect the safe operating area at high ambient temperatures where sustained 2x15W output can push the junction close to thermal limits without adequate heatsinking.
Typical applications include flat-panel TV stereo speaker drivers, portable radio boombox amplifiers, LCD monitor audio outputs, PC motherboard sound subsystems, and DIY audio upgrade kits. The part is commonly found in 2.1-channel subwoofer + satellite systems where a third mono channel can be derived by bridging the two outputs in parallel.
When designing with the TDA7297, always provide adequate heatsinking through the Multiwatt tab and respect the 6V-18V supply range. The Standby and Mute pins should be sequenced with a 10kohm/10uF RC network as recommended in the datasheet to achieve click-free power transitions.
ドロップイン代替品: TDA7297 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TDA7297 （同一形状・フットプリント） — 相違点: External Components Required, Gain, Mounting Type, Number of Channels, Product Type.
クイック比較ツール — 並列比較する代替部品を選択:
TDA7297SA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TDA7266B
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TDA7266SA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TDA7266
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TDA7266S
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TDA7266M
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TDA7297 最大定格＆電気的特性
| Product Type | Audio Power Amplifier IC |
| トポロジー | Dual Bridge (BTL), Class-AB |
| Number of Channels | 2 (Stereo) |
| Output Power per Channel | 15 W into 8 ohm (typical) |
| Supply Voltage Range | 6 V to 18 V |
| Standby Function | Yes (Standby pin) |
| Mute Function | Yes (Mute pin) |
| Gain | Internally Fixed (32 dB typical) |
| External Components Required | Minimal - no SWR cap, no bootstrap, no Boucherot cells |
| Package Type | Multiwatt-15 (vertical, through-hole) |
| ピン数 | 15 |
| 実装タイプ | Through-Hole |
| RoHS Compliance | Compliant |
| Lead-Free | Yes |
TDA7297 ピン構成
| ピン 1 | STBY — Standby control input (active high) |
| ピン 2 | MUTE — Mute control input (active high) |
| ピン 3 | GND — Ground |
| ピン 4 | OUT1+ — Channel 1 positive output |
| ピン 5 | OUT1- — Channel 1 negative output (BTL pair with pin 4) |
| ピン 6 | VCC — Positive supply voltage |
| ピン 7 | OUT2+ — Channel 2 positive output |
| ピン 8 | OUT2- — Channel 2 negative output (BTL pair with pin 7) |
| ピン 9 | GND — Ground |
| ピン 10 | IN2 — Channel 2 audio input |
| ピン 11 | SVR — Supply voltage rejection / ripple filter |
| ピン 12 | IN1 — Channel 1 audio input |
| ピン 13 | GND — Ground |
| ピン 14 | NC — Not connected (per datasheet) |
| ピン 15 | NC — Not connected (per datasheet) |
主な用途
TDA7297 の用途: 6 件s: Flat-Panel TV Stereo Audio Output, Portable Radio Boombox Amplifier, LCD Monitor Audio Output Stage, PC Motherboard Stereo Audio, DIY Audio Upgrade Amplifier Kits, 2.1-Channel Subwoofer + Satellite System.
Flat-Panel TV Stereo Audio Output
The TDA7297's 15W+15W dual bridge Class-AB output and 6V-18V supply range make it an ideal integrated amplifier for flat-panel TV stereo speakers, where board space is constrained and minimal external components are critical. Per the ST datasheet, the device's fixed-gain topology eliminates SWR capacitors, bootstrap networks, and Boucherot cells, allowing the entire TV audio section to fit on a small PCB adjacent to the speaker connectors. Compared to discrete amplifier designs, the TDA7297 delivers consistent channel matching and reduced BOM cost. The integrated Standby and Mute pins enable low-power standby states for ENERGY STAR compliance. Recommended companion MPNs: TDA7266B (lower-power alternative), STA540 (legacy reference design for 4-channel TV audio).
おすすめ
Portable Radio Boombox Amplifier
For portable boombox and shelf-system designs, the TDA7297 provides ample headroom from a 12V or 15V battery/adaptor supply, while its Multiwatt-15 package supports the thermal demands of sustained loud playback. The fixed-gain BTL topology eliminates bulky output coupling capacitors, reducing both BOM cost and enclosure height. Per the ST datasheet, the integrated Standby pin enables low Iq operation when the unit is idle, extending battery life. Compared to using two separate TDA2003 mono ICs, the TDA7297 saves board area and improves channel balance. Recommended companion MPNs: TDA7297SA (wider voltage range), TDA7266 (compact variant).
おすすめ
LCD Monitor Audio Output Stage
The TDA7297 is widely deployed as the audio output stage in LCD computer monitors, where its 15W+15W capability drives integrated stereo speakers while running cool on a 12V monitor supply rail. The Multiwatt-15 through-hole package bolts directly to the monitor's metal chassis, providing both heatsinking and mechanical robustness in shipping and handling. Per the ST datasheet, Mute and Standby functions integrate with the monitor's main microcontroller for clean power-up/down sequencing. The fixed-gain design eliminates calibration steps in mass production. Recommended companion MPNs: TDA7266SA (3.5-18V variant), TDA7294 (mono high-power option).
おすすめ
PC Motherboard Stereo Audio
Compact PC motherboards and small-form-factor systems benefit from the TDA7297's small footprint and minimal external component count, delivering desktop-quality stereo audio without the EMI challenges of Class-D switching amplifiers. The fixed-gain topology means no external feedback network resistors, simplifying the layout and reducing assembly defects. Per the ST datasheet, the device's 6V-18V supply range supports direct connection to a 12V or 5V+5V motherboard rail. Compared to TPA3116 Class-D solutions, the TDA7297 produces cleaner EMI signatures at the cost of lower efficiency. Recommended companion MPNs: TDA7266B, TDA7297SA.
おすすめ
DIY Audio Upgrade Amplifier Kits
The TDA7297 has a strong DIY audio community following, with numerous kit designs available from vendors selling bare PCBs and matched components for hobbyist stereo amplifier projects. Its Multiwatt-15 package is robust for hand-soldering, the fixed gain simplifies the build process, and 15W+15W is more than enough for desktop and bookshelf speaker upgrades. Per the ST datasheet, the dual BTL configuration can be paralleled for mono subwoofer operation up to 30W into 4 ohm. Compared to TPA3118 Class-D modules, the TDA7297 generates measurable heat but offers analog-friendly design and modification headroom. Recommended companion MPNs: TDA7297SA, TDA7497 (higher-power alternative).
おすすめ
2.1-Channel Subwoofer + Satellite System
By paralleling the two channels of the TDA7297 in a BTL configuration, designers can create a 2.1-channel subwoofer+satellite amplifier using two TDA7297 ICs: one driving a mono subwoofer at up to 30W into 4 ohm, the other driving left/right satellite speakers at 15W+15W. The fixed-gain topology simplifies the active low-pass crossover design and eliminates the need for matched resistors. Per the ST datasheet, Standby and Mute pins integrate with subwoofer power-down sequencing. Compared to using dedicated subwoofer ICs, this approach reuses the same BOM and supply design. Recommended companion MPNs: TDA7297SA, TDA7266B.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TDA7297 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TDA7297SA | TDA7266B | TDA7266SA | TDA7266 |
|---|---|---|---|---|---|
| Package | Multiwatt-15 | Multiwatt-15 - same | Multiwatt-15 - same | Multiwatt-15 - same | Multiwatt-15 - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Output Power per Channel | 15 W | 15 W | 7 W | 7 W | 7 W |
| Supply Voltage Range | 6 V to 18 V | 3.5 V to 18 V (wider) | 3.5 V to 18 V (wider) | 3.5 V to 18 V (wider) | 3.5 V to 18 V (wider) |
| Number of Channels | 2 (Stereo) | 2 (Stereo) | 2 (Stereo) | 2 (Stereo) | 2 (Stereo) |
| Standby/Mute Pins | Yes (both) | Yes (both) | Yes (both) | Yes (both) | Yes (both) |
| Gain | Internally Fixed (~32 dB) | Internally Fixed | Internally Fixed | Internally Fixed | Internally Fixed |
| Topology | Dual Bridge Class-AB | Dual Bridge Class-AB | Dual Bridge Class-AB | Dual Bridge Class-AB | Dual Bridge Class-AB |
| Mounting Type | Through-Hole | Through-Hole | Through-Hole | Through-Hole | Through-Hole |
主な差別化要因
- Higher output power than TDA7266 family in same package （vs TDA7266B)
- Standard supply voltage optimized for TV/audio rails （vs TDA7297SA)
- Minimal external component count （vs TDA7294)
設計ノート
At 18V supply delivering 15W per channel into 8 ohm loads, the TDA7297 dissipates roughly 8-12W of waste heat depending on audio crest factor. The Multiwatt-15 package has a junction-to-ambient thermal resistance of approximately 35 C/W without an external heatsink. A bolt-on or clip-on heatsink rated at 10 C/W or better is recommended for sustained full-power operation to keep junction temperature below 150 C. The metal tab of the Multiwatt package must be bolted firmly to the heatsink with thermal compound applied.
Place the input coupling capacitors (typically 0.1uF to 1uF) close to the IN1/IN2 pins to minimize noise pickup. Route the BTL output pairs (OUT1+/OUT1- and OUT2+/OUT2-) as differential traces to the speaker connector to maintain CMRR and reduce radiated EMI. Keep the supply decoupling capacitors (typically 100nF ceramic in parallel with 470uF electrolytic) within 5mm of the VCC pin. The SVR pin requires a 10uF-100uF capacitor to ground for proper supply ripple rejection.
Never exceed the 18V absolute maximum supply voltage - even brief transients above 20V can permanently damage the output stages. Always sequence the Standby and Mute pins via a 10kohm/10uF RC network as recommended in the ST datasheet to avoid loud turn-on/turn-off clicks. Do not load the outputs below 4 ohm - the TDA7297 is designed for 8 ohm nominal loads and lower impedances risk thermal runaway. The metal tab is internally connected to the substrate and must be electrically isolated from ground at the heatsink if the design requires it, otherwise it can be tied directly to GND via the heatsink.
コンプライアンス情報
RoHS and lead-free compliance per ST product page. Not AEC-Q100 qualified - this is a consumer audio part, not automotive grade. Reach compliance status inferred from ST product page presence; halogen-free status not explicitly listed in provided data.
