TDA7297D - 10W+10W Dual Bridge Amplifier | STMicroelectronics
부품 번호: TDA7297D ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $3.1 | $3.10 |
| 10 | $2.75 | $27.50 |
| 100 | $2.3 | $230.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.65 | $1,650.00 |
| 2,500 | $1.4 | $3,500.00 |
TDA7297D 개요
A dual bridge amplifier (also called BTL or full-bridge) is an audio amplifier topology where each channel uses two amplifiers operating in anti-phase across the load, eliminating the need for a large output coupling capacitor and producing roughly four times the output power of a single-ended amplifier at the same supply voltage. The TDA7297D sits within the broader hierarchy of audio ICs -> power amplifiers -> Class-AB amplifiers -> stereo bridge amplifiers, and is widely deployed in cost-sensitive consumer audio where a clean, low-component-count solution is preferred.
Key features include a built-in fixed gain (internally set, so no external feedback network is required), an internally fixed gain typically around 26 dB, mute/standby logic for low-Iq shutdown, and very low external component count, which reduces BOM cost and PCB area. The wide 6.5 V to 18 V supply range allows the same part to support 12 V consumer rails, automotive 13.2 V bus operation, and lower-voltage portable designs.
Typical applications include stereo audio output stages in LCD/Plasma TVs, portable radios, boom boxes, PC multimedia speakers, and any compact stereo appliance where each side of a speaker must be driven in bridge configuration. The integrated protections make the part robust against accidental shorts and thermal overload during normal consumer use.
When designing with this device, ensure the PowerSO-20 thermal pad is soldered to a sufficient copper pour to keep junction temperature within limits; at 2x10 W into 8 ohm the device dissipates several watts and benefits from at least 1 to 2 square inches of copper. Always observe the absolute maximum supply rating of 18 V to prevent device damage.
드롭인 대체품: TDA7297D — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: TDA7297D (동일 폼 팩터 및 풋프린트) — 차이점: Mounting Type, Number of Channels, Supply Voltage Range, External Components Required, Gain.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TDA7297
✅ 드롭인✓ 재고 있음
$1.55 / 개
데이터시트 보기 →TDA7266
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TDA7266M
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
E-TDA7377
✅ 드롭인✓ 재고 있음
$1.1924 / 개
데이터시트 보기 →TDA7297D 최대 정격 & 전기적 특성
| Product Type | Dual Bridge (BTL) Audio Power Amplifier |
| 토폴로지 | Dual Full Bridge (BTL), Class AB |
| Output Power | 10 W + 10 W into 8 ohm at THD = 10%, VCC = 13 V |
| Supply Voltage Range | 6.5 V to 18 V |
| Number of Channels | 2 (stereo, bridge-tied load) |
| 출력 유형 | Bridge, no output coupling capacitor required |
| Gain | Internally fixed (typical +26 dB, datasheet for exact value) |
| Standby Function | Yes (Stand-by + Mute) |
| Short-Circuit Protection | Yes (built-in) |
| Thermal Protection | Yes (thermal shutdown) |
| External Components Required | None for SVR, bootstrap, Boucherot cells |
| 패키지 | PowerSO-20 (exposed thermal pad, 12.8 x 7.5 mm) |
| Technology | BI20II bipolar |
| 실장 유형 | Surface Mount |
| Primary Applications | Home audio, Plasma TV, LCD TV |
TDA7297D 핀 구성
| 핀 1 | OUT1B — Channel 1 output B (bridge-tied load, negative swing) |
| 핀 2 | OUT1A — Channel 1 output A (bridge-tied load, positive swing) |
| 핀 3 | GND — Ground / thermal pad reference |
| 핀 4 | VCC — Supply voltage (6.5 V to 18 V) |
| 핀 5 | STBY — Standby pin (low = standby, high = active) |
| 핀 6 | MUTE — Mute input (low = muted, high = playing) |
| 핀 7 | NC — Not connected |
| 핀 8 | IN1- — Channel 1 inverting input |
| 핀 9 | IN1+ — Channel 1 non-inverting input |
| 핀 10 | GND — Ground / thermal pad reference |
| 핀 11 | NC — Not connected |
| 핀 12 | IN2+ — Channel 2 non-inverting input |
| 핀 13 | IN2- — Channel 2 inverting input |
| 핀 14 | NC — Not connected |
| 핀 15 | NC — Not connected |
| 핀 16 | MUTE — Mute input (alternate pin, paralleled internally) |
| 핀 17 | STBY — Standby (alternate pin, paralleled internally) |
| 핀 18 | GND — Ground / thermal pad reference |
| 핀 19 | OUT2A — Channel 2 output A (bridge-tied load, positive swing) |
| 핀 20 | OUT2B — Channel 2 output B (bridge-tied load, negative swing) |
일반적인 애플리케이션
TDA7297D 적합 용도: 7 애플리케이션s: LCD / Plasma TV Audio Output Stage, Portable Radio / Boom-Box Stereo, PC Multimedia Speaker Pair, Kitchen / Bathroom Embedded Stereo, Docking Station / Tabletop Speaker, Toy and Educational Audio Modules, Replacement Board for Legacy CRT TV Audio.
LCD / Plasma TV Audio Output Stage
The TDA7297D fits LCD and Plasma TV audio output stages because each channel delivers 10 W into 8 ohm at 13 V from a single supply, directly matching the 12 V to 16 V rail typically present in modern flat-panel TVs. Its dual-bridge architecture drives each TV speaker differentially, halving the load impedance seen by the IC and providing roughly four times the output power of a single-ended design at the same rail. With standby and mute logic onboard, the part supports Energy Star standby <0.5 W when the TV is muted, and its PowerSO-20 thermal pad can be soldered to the TV chassis copper for thermal relief. Designers gain a 2x10 W stereo solution with no SVR or bootstrap capacitors, shrinking the BOM to a handful of decoupling parts.
추천
Portable Radio / Boom-Box Stereo
The TDA7297D suits portable radio and boom-box designs because its 6.5 V to 18 V supply range accepts 7.2 V battery packs, 12 V lead-acid, and 13.2 V automotive rails from the same part number, eliminating the BOM variant count for different product SKUs. Each channel drives 8 ohm full-range automotive-style speakers in bridge mode, doubling the acoustic output from the same battery; the standby pin lets the MCU power-down to microamp idle when the audio is muted. Thermal shutdown guards against voice-coil shorts during rough handling, an important feature for consumer portable products.
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PC Multimedia Speaker Pair
The TDA7297D's 2x10 W into 8 ohm comfortably drives two PC multimedia speakers from a 12 V wall-adapter supply without the inductor and LC-filter noise of a Class-D solution, an advantage when the speakers sit within 30 cm of a USB-attached RF device. Bridge outputs also tolerate the long cable runs typical of desktop speakers without requiring the high-value coupling cap single-ended amplifiers would need, which would otherwise be a multi-hundred-microfarad electrolytic. Mute/standby pins integrate cleanly with the PC's USB power-management signaling.
추천
Kitchen / Bathroom Embedded Stereo
The TDA7297D matches embedded kitchen and bathroom stereo requirements where compact size, low stand-by power, and reliable thermal behavior in high-humidity situations are mandatory. Its PowerSO-20 mechanical footprint combines with the wide 6.5 V to 18 V supply range so the same design can be drop-shipped across 100 V AC-DC adapter markets (12 V) and outdoor patio variants (24 V regulated). The integrated short-circuit protection defends against moisture-induced speaker-cone shorts common in these environments.
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Docking Station / Tabletop Speaker
Tabletop docking stations and Bluetooth speakers using the TDA7297D benefit from a no-coupling-cap architecture that keeps board height low - an important constraint when target enclosures are as thin as 30 mm. The dual-bridge output supports a 2x10 W stereo pair directly from a 13 V mains-rail bus, replacing bulkier discrete Class-D solutions and their EMI beeper requirements, and reducing BOM and certification cost. The on-chip mute pin cleanly integrates with Bluetooth module sleep timing.
추천
Toy and Educational Audio Modules
The TDA7297D is well suited to educational toys and audio learning modules because its wide 6.5 V to 18 V supply range matches common battery configurations (4xAA, 2S Li-ion, mains adapter), the fixed internal gain removes calibration steps during manufacture, and the high reliability of the bipolar BI20II process reduces field returns. Stand-by current is pulled low enough that battery-equipped modules can survive storage; mute pin connects to a coin-cell MCU wake signal.
추천
Replacement Board for Legacy CRT TV Audio
The TDA7297D's PowerSO-20 footprint and BI20II silicon make it a strong drop-in choice for designers repairing or modernizing legacy CRT-TV audio boards where discrete single-ended amplifiers often fail because of dried-out output coupling caps. With no coupling cap needed, the new board remains reliable for years in the hot, dusty CRT chassis; 2x10 W comfortably drives the original 8 ohm elliptical TV speakers. The mute pin ties directly to the chassis ON-OFF rail.
추천
추천 제품 요약
엔지니어링 참조 데이터: TDA7297D — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TDA7297 | TDA7294 | TDA7295 | TDA7266 | TDA7266M | TDA7377 |
|---|---|---|---|---|---|---|---|
| Package | PowerSO-20 (12.8x7.5 mm) | PowerSO-20 / MULTIWATT-15 (per variant) | MULTIWATT-15 | MULTIWATT-15 | PowerDIP-15 / SO-20 (per variant) | PowerDIP-15 | MULTIWATT-15 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Topology | Dual BTL (2 channels) | Dual BTL (2 channels) | Single BTL (1 channel) | Single BTL DMOS | Mono single-ended | Mono (7 W) | Quad BTL (4 channels) |
| Output Power (per channel) | 10 W into 8 ohm @ VCC 13 V | 15 W into 8 ohm @ VCC 13 V | ~30-35 W into 8 ohm @ VCC +/-25 V | ~80 W into 4-8 ohm @ VCC +/-30 V | 5-7 W mono | 7 W mono | 4x6 W (or 2x12 W BTL-coupled stereo) |
| Supply Voltage Range | 6.5 V to 18 V (single rail) | 6.5 V to 18 V | +/-10 V to +/-30 V (dual rail) | +/-10 V to +/-30 V (dual rail) | 3-18 V (single rail) | Similar low-voltage single rail | Up to 18 V |
| Class | AB bipolar (BI20II) | AB bipolar (BI20II) | AB bipolar | DMOS (high-power AB) | AB bipolar | AB bipolar | AB bipolar |
| Standby / Mute | Yes | Yes | Mute only | Mute only | Yes | Yes | Yes |
| Short-Circuit Protection | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
주요 차별점
- BTL dual-bridge output with no coupling capacitor (vs TDA7266 (single-ended mono with output coupling cap))
- Wide single-rail supply range 6.5 V to 18 V (vs TDA7294 (dual-rail +/-10 V to +/-30 V))
- PowerSO-20 footprint at only 10 W + 10 W (vs TDA7295 in MULTIWATT-15 (~80 W BTL mono))
설계 노트
Estimated: at 2x10 W into 8 ohm continuous with VCC 13 V, the TDA7297D will dissipate on the order of 1.6 W per channel of waste heat (VIN-VOUT differential times current plus bias/quiescent). The PowerSO-20 thermal pad must be soldered to the PCB copper pour - typically at least 1 square inch of 1 oz copper - to keep junction rise within safe limits. For sustained full-power operation across the audio duty cycle, add a thin extruded-aluminum heatsink glued to the back of the PCB or use the chassis itself as a heatsink.
Recommended: place at least 100 nF X7R + 100 uF 25 V aluminum-polymer decoupling on the VCC supply as close as practical to the supply pin, and add 100 nF in parallel to suppress supply-pumping transients that bridge amplifiers generate when the load voltage swings low. A diode-protected bulk reservoir reduces audible pops during mute transitions.
Recommended: lay the PowerSO-20 thermal pad as a single continuous copper region on both top and bottom layers, stitch with at least 6 thermal vias (0.3 mm drill). Keep input traces short and away from the bridge outputs to avoid crosstalk. Route the bridge outputs as a balanced pair with equal trace length, and do not run them across digital or switcher areas - Class-AB emitters can pick up switching noise.
Critical: never allow VCC to exceed the absolute maximum of 18 V (datasheet) even momentarily; transient protection (TVS + bulk cap) is recommended when the IC is fed by an off-line adapter. Mute and standby pins must be driven from a clean source - leaving them floating activates the standby state unpredictably. Always observe the bootstrap-free and SVR-free design rules from the ST datasheet: no internal compensation nodes are exposed for external adjustment.
Optional: on long input cables or when driving TV antennas, add a 10 kohm to 47 kohm resistor in series with each input pin plus a small capacitor to ground to form an RF filter, preventing spurious AM-band rectification. The mute pin should be debounced by the upstream MCU to avoid musical pops during mute toggling.
규정 준수 정보
RoHS and REACH compliance from ST product page; lead-free PowerSO-20 finish. No AEC-Q100 qualification advertised - non-automotive grade. Confirm halogen-free with the manufacturer's latest datasheet before environmental submission.
