TDA2009A - 10W+10W Stereo Class-AB Audio Amplifier | STMicroelectronics
N.º da peça: TDA2009A ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $2.96 | $29,60 |
| 100 | $2.41 | $241,00 |
| 500 | $2.07 | $1.035,00 |
| 1.000 | $1.83 | $1.830,00 |
TDA2009A Visão geral
What is a class-AB audio power amplifier? A class-AB amplifier is the most common bipolar topology used in mid-power audio reproduction; it biases its output stage so that push and pull transistors each conduct for slightly more than half a cycle. This eliminates the crossover distortion of pure class-B designs while keeping efficiency far higher than class-A. The TDA2009A instantiates that topology with on-chip short-circuit protection, thermal shutdown, and AC short-circuit protection of the load, integrating a complete stereo driver into one Multiwatt-11 power package with the heatsink tab on the back.
Key features include 10 W + 10 W continuous output into 4 Ω with THD = 10 % at 14 V / 4 Ω (per ST datasheet), 1 % THD typical at lower levels, an operating supply range of 8 V to 28 V, 3 A peak output current per channel, very low harmonic and crossover distortion, and internal protection against short circuits, thermal overload, and DC voltage on the load. The Multiwatt-11 (Pentawatt-style) package exposes a metal tab so the part itself forms the heatsink, simplifying PCB mechanical design.
The architecture uses a vertical bipolar power process with quasi-complementary NPN/PNP output pairs, a unity-gain inverting topology per channel, and internal bias generators that minimize quiescent crossover glitch. The result is a flat frequency response from 20 Hz to 20 kHz with low 0.1 % harmonic content, suitable for full-range music reproduction without complex external compensation networks.
Typical applications include stereo Hi-Fi music centers, multimedia speaker systems, TV audio output stages, guitar and instrument practice amplifiers, automotive radios (with 14 V supply), and self-powered USB speakers where dual-channel audio from a single chip replaces two single-channel modules.
When designing with this device, place a 100 nF decoupling capacitor on the supply pin as close as possible to the IC, use feedback resistors of 39 kΩ for closed-loop gain near 35 dB, and provide adequate heatsinking through a clip-on or bonded tab. The package tab is electrically tied to the -Vs pin (or to the substrate in some legacy datasheets) - consult the datasheet pinout before insulating the heatsink.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes for the TDA2009A, providing information not consolidated on any single distributor product page.
Alternativas drop-in para TDA2009A — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TDA2009
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TDA2007A
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TDA2009A Classificações máximas e características elétricas
| Tipo de saída | 2-Channel (Stereo) Audio Power Amplifier |
| Amplifier Class | Class-AB |
| Output Power (Continuous) | 10 W + 10 W (typical, stereo into 8 Ω / 14 V supply) |
| Output Power @ 4 Ω THD 10 % | 10 W per channel (typical, VCC = 14 V) |
| Output Power @ 8 Ω THD 10 % | 10 W per channel (typical, VCC = 18 V) |
| Supply Voltage Range (Operating) | 8 V to 28 V |
| Peak Output Current per Channel | 3.5 A (typ) [per ST datasheet body] |
| Total Harmonic Distortion (THD) | 0.1 % typical (PO = 1 W, f = 1 kHz) |
| Closed-Loop Gain (typ) | 35 dB (1.8 kΩ / 33 kΩ feedback topology) |
| Bandwidth (-3 dB) | 20 Hz to 20 kHz (audio band) |
| Encapsulamento | Multiwatt-11 (11 pins, vertical, tab heatsink) |
| Short-Circuit Protection | Yes (AC, DC short to GND, short to supply) |
| Desligamento térmico | Yes (internal) |
| Tipo de montagem | Through-Hole (Multiwatt-11) - also offered as Multiwatt Horizontal |
| Status RoHS | Compliant (Multiwatt Pb-free variants) |
Configuração de pinos do TDA2009A
| Pino 1 | Inverting Input (CH1) — CH1 inverting input, feedback divider tie point |
| Pino 2 | Non-Inverting Input (CH1) — CH1 audio signal input |
| Pino 3 | SVR / Bootstrap (CH1) — Supply voltage rejection / ripple filter capacitor to GND |
| Pino 4 | Bootstrap (CH1) — CH1 bootstrap capacitor connection (BV cap) |
| Pino 5 | Output (CH1) — CH1 power output to speaker |
| Pino 6 | Vs+ — Supply voltage (8 V to 28 V) |
| Pino 7 | GND / Negative Supply — Ground return |
| Pino 8 | Bootstrap (CH2) — CH2 bootstrap capacitor connection |
| Pino 9 | Output (CH2) — CH2 power output to speaker |
| Pino 10 | SVR / Bootstrap (CH2) — CH2 supply voltage rejection / ripple capacitor |
| Pino 11 | Non-Inverting Input (CH2) — CH2 audio input |
Aplicações típicas
TDA2009A é adequado para 7 aplicaçãos: Mini Hi-Fi Stereo Music Center, Multimedia Computer Speaker System, Automotive Aftermarket Radio (14 V bus), Television Audio Output Stage, Guitar and Instrument Practice Amplifier, Public-Address and Voice-Announcement Booster, Portable Bluetooth Speaker with Stereo Pairing.
Mini Hi-Fi Stereo Music Center
The TDA2009A's dual-channel class-AB architecture delivers 10 W + 10 W per channel into 4 to 8 Ω speakers from a single 18 to 24 V supply, ideal for bookshelf stereo systems. Its 0.1 % THD at 1 W (per ST datasheet) preserves high-fidelity signal quality for music centers. Two channels fit into a single Multiwatt-11 tab, allowing compact PCB layout with a clip-on heatsink. Compared with two single-channel chips, this part saves board space and matches channel gain within dB, which is critical for stereo imaging.
Recomendado
Multimedia Computer Speaker System
Self-powered multimedia USB speakers typically need 5 to 15 W per channel from a single, compact IC. The TDA2009A's 8 V to 28 V operating range accepts directly the 12 V output of a laptop power brick or internal DC-DC boost stage. The Multiwatt-11 vertical package saves board area versus two mono chips, and the integrated AC short-circuit and thermal protection guards against tweeter faults from amplifier clipping. Independent measurement data show 0.1 % THD typical at 1 W, enough headroom for clean 90 dB SPL desktop playback.
Recomendado
Automotive Aftermarket Radio (14 V bus)
The TDA2009A's 8 V to 28 V supply range covers the full 14 V automotive bus including cranking transients above 16 V, making it a robust IC for aftermarket car stereos. The 3.5 A peak output current per channel drives 4 Ω door speakers at reasonable volume, and the Multiwatt-11 tab dissipates heat to a chassis-mounted clip heatsink. ST does not claim AEC-Q100 qualification, so designers should use this IC for after-market or non-safety-critical radios, not OEM infotainment platforms.
Recomendado
Television Audio Output Stage
Modern TVs increasingly use digital PWM stages and external DACs, but compact 24-inch LCD/LED sets still need an analog 10 W+10 W amplifier behind the headphone jack and built-in speakers. The TDA2009A, fed from a 12 V DC-DC supply rail, outputs 10 W into 8 Ω simultaneously on both channels. Its integrated short-circuit protection prevents catastrophic failure when the headphone plug shorts the line. The Multiwatt-11 vertical orientation saves height against slim TV backlights.
Recomendado
Guitar and Instrument Practice Amplifier
Practice amps for guitar and bass need clean headroom plus a simple topology, typically 10 to 20 W per channel with low THD. The TDA2009A's 10 W+10 W output, 20 Hz to 20 kHz bandwidth, and 0.1 % THD suit clean tones for jazz and country while withstanding transients from pick attack. The Multiwatt-11 package simplifies assembly - a single heatsink clip dissipates thermal load. Bridge-tied-load operation effectively doubles output for a single 8 to 4 Ω speaker cabinet in monaural practice rigs.
Recomendado
Public-Address and Voice-Announcement Booster
Small PA zones and door-bell announcement systems need a 10 to 15 W amplifier that runs from 24 V line power and can deliver intelligible speech. The TDA2009A's 8 V to 28 V supply accepts a 24 V rail directly without pre-regulation. Its dual-channel topology supports two speaker zones (lobby, corridor) in a single IC, and the integrated thermal shutdown prevents damage during sustained feedback squeal in harsh PA environments. Bridge mode for higher power is a documented variant in the ST datasheet application circuit.
Recomendado
Portable Bluetooth Speaker with Stereo Pairing
Battery-powered 12 V Bluetooth speakers often integrate a stereo pair to maximize perceived loudness. The TDA2009A's 0.1 % typical THD at 1 W preserves Bluetooth aptX audio quality, while its 3.5 A peak output current delivers crisp transients from wireless audio sources. Its Multimet-11 vertical package exposes a backside heatsink tab that pairs with the speaker enclosure's metal wall for passive cooling in compact plastic cabinets.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TDA2009A — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TDA2009 | TDA2007A |
|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | Multiwatt-11 | Multiwatt-11 | Multiwatt-11 |
| Output Power (per channel) | 10 W | 10 W | 6 W (-40 %) |
| Channels | 2 (stereo) | 2 (stereo) | 2 (stereo) |
| Supply Voltage Range | 8 V to 28 V | 8 V to 28 V | 8 V to 26 V |
| AC Short-Circuit Protection | Yes | No | Yes |
| Thermal Shutdown | Yes | Yes | Yes |
| Recommended Replacement Status | Current active recommended variant | Legacy / lacking AC protection | Active, lower power |
Principais diferenciais
- Internal AC short-circuit protection on the output (vs TDA2009)
- Higher 10 W per channel vs 6 W per channel (vs TDA2007A)
- Same Multiwatt-11 footprint as ST's other 2009-class parts (vs Cross-package Class-AB ICs)
Notas de projeto
Estimated: at 14 V supply, VOUT swing of 12 Vrms into 8 Ω (10 W per channel) draws 12V/8Ω = 1.5 A peak per channel. Supply bypass requires 100 nF + 1000 µF bulk electrolytic within 5 cm of pin 6 (Vs) with low-inductance path to pin 7 (GND). The Multiwatt-11 tab is internally connected to the substrate; do not isolate the heatsink if the application circuit references the tab.
Estimated: at 18 V supply / 4 Ω / THD 10 % / both channels driven, total power dissipation is roughly 2 × 10 W × (1 - η), with class-AB efficiency near 60 %, giving about 8 W heat. The Multiwatt-11 thermal resistance θJA is approximately 12 °C/W with a clip-on heatsink of 50 cm², implying 96 °C rise above 25 °C ambient - within the safe TJ range. Use a thermal compound and a minimum 40 × 40 × 25 mm aluminum clip.
Place the bootstrap capacitors (typically 100 µF, low-ESR) as close to pins 4 (CH1) and 8 (CH2) as possible. The SVR capacitors on pins 3 and 10 should be 22 µF electrolytic + 100 nF ceramic in parallel to maximize supply rejection. Keep the high-current output traces on pins 5 and 9 wide enough for 3.5 A peak (≥ 75 mil on 1 oz copper). Avoid routing input (pins 1, 2, 11) directly above output traces.
Pins 3, 7, and 12 (or equivalent substrate pins per board layout) are prone to cold solder joints at reflow time per the p-inout.com repair guide - hand-rework and visually inspect after reflow. Also, do not assume the legacy TDA2009 datasheet matches the TDA2009A: the 'A' parts include AC short-circuit protection that the original lacks (community-confirmed, All About Circuits forum).
For stereo (BTL) operation to mono, configure each channel in inverting mode and bridge-tie the outputs, doubling the output swing. Ground the unused inputs to a quiet analog ground rather than to pin 7 (GND) directly, to minimize channel-to-channel crosstalk. The Multiwatt-11 tab substrate connection may be left floating when using an isolated heatsink clip, but under no circumstances should the tab be shorted to a circuit net.
Informações de conformidade
Multiwatt-11 package ROHS3 compliant per ST datasheet ordering codes. Halogen-free status not explicitly stated in retrieved web data; check ST ordering code suffix. AEC-Q100 not applicable per ST product classification (Hi-Fi / consumer IC).
