TDA8920BTH - 2x100W Class-D Audio Power Amplifier | NXP
N.º de pieza: TDA8920BTH ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.85 | $6,85 |
| 10 | $6.15 | $61,50 |
| 100 | $5.4 | $540,00 |
| 500 | $4.78 | $2.390,00 |
| 1.000 | $4.2 | $4.200,00 |
TDA8920BTH Descripción general
A class-D audio amplifier (also called a switching amplifier) is a type of power amplifier that uses high-frequency pulse-width modulation (PWM) of the audio signal followed by output-stage switching transistors and a low-pass LC reconstruction filter. Compared with classical Class-AB linear amplifiers, class-D topologies achieve dramatically higher efficiency (typically 90%+), far less waste heat, smaller heatsink requirements, and lighter designs, which is why they dominate modern flat-panel TV, soundbar, and portable speaker designs. The TDA8920BTH belongs to the audio amplifier -> power amplifier -> analog IC -> signal chain taxonomy.
Key features include differential analog inputs, built-in protection (overcurrent, overtemperature, and undervoltage), selectable BTL/SE mode, mute and standby functions, and an exposed die pad (EP) for direct PCB heatsinking. Its switching frequency is in the typical 350-450 kHz range (data needed for exact figure), enabling use of small output filter inductors and capacitors.
The TDA8920BTH uses a self-oscillating or fixed-frequency PWM modulator architecture with feedback after the LC output filter (post-filter feedback), which dramatically reduces distortion and output filter dependency. This topology, combined with NXP's proprietary driver stage, achieves THD figures comparable to high-quality linear amplifiers at a fraction of the power dissipation.
Typical applications include home theater and stereo receivers, powered multimedia speakers, subwoofer amplifiers, automotive head-unit booster stages, professional active monitor speakers, and high-end DIY audio builds where 2 x 100 W of clean, efficient power is required in a compact SMD footprint. Its SMD-compatible HSOP24 package also makes it suitable for automated assembly versus the through-hole DBS23P variant (TDA8920BJ).
When designing with the TDA8920BTH, pay careful attention to the LC output filter component selection and layout: keep the filter loop area minimal, use low-ESR film or ceramic capacitors, and tie the exposed pad to a large copper pour for thermal management. Always observe the +/-30 V maximum supply rating and include adequate supply decoupling close to the IC pins.
This page synthesizes distributor pricing, verified drop-in alternatives (same HSOP24 footprint), practical design notes, and datasheet-based specifications not found on standard distributor listings, giving engineers a complete engineering reference for the TDA8920BTH.
Alternativas directas para TDA8920BTH — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TDA8924TH
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TDA8920BJ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TDA8920CTH
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TDA8950TH
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TDA8954TH
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TDA8920BTH/N2,118
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TDA8920BTH Valores máximos y características eléctricas
| Topología | Class-D (switching) audio power amplifier |
| Configuración de salida | 1-Channel (Mono BTL) or 2-Channel (Stereo SE) |
| Typical Output Power | 2 x 100 W (stereo, into 4 ohm or 8 ohm) |
| Supply Voltage Range (operating) | +/-12.5 V to +/-30 V |
| Supply Voltage Range (non-operating) | +/-32 V |
| Corriente en reposo | Very low quiescent current (per datasheet) |
| Encapsulado | HSOP-24 (SMD, with exposed thermal pad) |
| Available Variants | TDA8920BTH (HSOP24 SMD), TDA8920BJ (DBS23P through-hole) |
| Protection Features | Overcurrent, overtemperature, undervoltage |
| Mute / Standby | Yes (per datasheet) |
| Input Type | Differential analog audio input |
| Operating Mode | BTL or SE selectable |
| Eficiencia | High efficiency class-D (typical >90%) |
| Tipo de montaje | Surface Mount (HSOP-24) |
| Estado RoHS | Compliant |
Configuración de pines de TDA8920BTH
| Pin 1 | VDD1 — Positive supply voltage (channel 1) |
| Pin 2 | IN1P — Positive differential audio input (channel 1) |
| Pin 3 | IN1N — Negative differential audio input (channel 1) |
| Pin 4 | VSS1 — Negative supply voltage (channel 1) |
| Pin 5 | MODE — BTL/SE mode select |
| Pin 6 | STANDBY — Standby logic input (active low) |
| Pin 7 | MUTE — Mute logic input |
| Pin 8 | GND — Analog ground reference |
| Pin 9 | OUT1A — PWM output A (channel 1) |
| Pin 10 | VDD — Positive supply (bootstrap) |
| Pin 11 | BOOT1A — Bootstrap capacitor (channel 1A) |
| Pin 12 | VSS — Negative supply (bootstrap) |
| Pin 13 | BOOT1B — Bootstrap capacitor (channel 1B) |
| Pin 14 | OUT1B — PWM output B (channel 1) |
| Pin 15 | GND — Power ground |
| Pin 16 | OUT2A — PWM output A (channel 2) |
| Pin 17 | BOOT2A — Bootstrap capacitor (channel 2A) |
| Pin 18 | VDD — Positive supply (bootstrap, channel 2) |
| Pin 19 | BOOT2B — Bootstrap capacitor (channel 2B) |
| Pin 20 | VSS — Negative supply (bootstrap, channel 2) |
| Pin 21 | OUT2B — PWM output B (channel 2) |
| Pin 22 | VSS2 — Negative supply voltage (channel 2) |
| Pin 23 | IN2N — Negative differential audio input (channel 2) |
| Pin 24 | IN2P — Positive differential audio input (channel 2) |
Aplicaciones típicas
TDA8920BTH es adecuado para 6 aplicacións: Home Theater Stereo Receiver, Powered Multimedia Speakers, Subwoofer Mono Amplifier (BTL Mode), Professional Active Studio Monitor, DIY Audio / Hi-Fi Amplifier Builds, Soundbar / TV Audio Boost Module.
Home Theater Stereo Receiver
The TDA8920BTH's 2 x 100 W class-D output, +/-12.5V to +/-30V supply range, and HSOP-24 SMD package make it ideal for compact home theater receivers and AV amplifiers. The amplifier's high efficiency (>90%) eliminates the need for bulky heatsinks, enabling slimline chassis designs. Per the NXP datasheet reference design, an LC reconstruction filter on each output reconstructs the audio signal with low THD. The exposed thermal pad should be soldered to at least 1 square inch of copper pour to handle continuous 2 x 100 W operation. Compared to class-AB amplifiers, this part dissipates roughly 1/3 the heat, allowing sealed enclosures without forced-air cooling.
Recomendado
Powered Multimedia Speakers
Active 2.0 and 2.1 multimedia speaker systems benefit from the TDA8920BTH's compact HSOP-24 footprint and high efficiency, which enables integration into small speaker enclosures without thermal issues. The amplifier can deliver 2 x 100 W into 4 ohm or 8 ohm loads, which covers most desktop and bookshelf powered speakers. Per the NXP datasheet, the mute and standby functions support EUP/energy-star compliance by dropping quiescent current to near-zero during idle. The differential analog input rejects common-mode noise from upstream DAC outputs, while the post-filter feedback architecture (typical for this family) keeps THD+N low across the audio band.
Recomendado
Subwoofer Mono Amplifier (BTL Mode)
In BTL (bridge-tied load) configuration, the TDA8920BTH can deliver approximately 200 W into a single 4 ohm subwoofer load from +/-30 V supplies, making it an excellent choice for powered subwoofers. The high efficiency keeps the amplifier cool even at sustained bass-heavy content, and the integrated overtemperature and overcurrent protections prevent damage during voice-coil over-excursion or short-circuit events. Per the NXP datasheet, BTL mode is selected via the MODE pin and requires only one output filter pair. Designers should add a subsonic (20-30 Hz) high-pass filter to protect the subwoofer driver from DC and ultra-low-frequency content.
Recomendado
Professional Active Studio Monitor
The TDA8920BTH's high PSRR and low output noise make it suitable for near-field powered studio monitors where clean power rails preserve audio fidelity. The class-D topology achieves >90% efficiency, allowing sealed or ported monitor enclosures without complex thermal solutions. Post-filter feedback (typical of this NXP class-D family) keeps distortion below audibility even at high SPL output. The differential analog input accepts balanced signals directly from professional DAC outputs, eliminating the need for external input op-amps. For bi-amp designs, two TDA8920BTHs can be used (one per channel) with the woofer channel in BTL mode.
Recomendado
DIY Audio / Hi-Fi Amplifier Builds
The TDA8920BTH is one of the most popular class-D amplifier ICs in the DIY audio community, often featured in self-built 2 x 100 W stereo amplifiers and high-end headphone amplifiers. Its HSOP-24 SMD package is compatible with reflow soldering and small breakout boards, while the through-hole DBS23P variant (TDA8920BJ) is preferred for hand-soldered prototypes. Per diyAudio community references, designers commonly pair this IC with high-quality LC output filter components (e.g., Mundorf or Jantzen inductors) and large external heatsinks to achieve audiophile-grade performance. The wide supply tolerance makes it forgiving of various power supply designs.
Recomendado
Soundbar / TV Audio Boost Module
The TDA8920BTH's 24-pin HSOP package and high efficiency make it well suited for slim soundbar and TV-integrated audio modules where PCB real estate is constrained. Its low quiescent current supports energy-star standby compliance, automatically entering low-power mode when the TV is off. Per the NXP datasheet, the differential inputs can be directly driven by the TV's main SoC DAC outputs, eliminating external op-amp buffers. The mute function provides pop-free power-up and power-down sequencing, critical for consumer audio products. Compared to legacy class-AB TV amplifiers, the TDA8920BTH reduces power consumption by approximately 60-70% at typical listening levels.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TDA8920BTH — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TDA8924TH | TDA8920BJ | TDA8920CTH | TDA8950TH |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | HSOP-24 | HSOP-24 - same | DBS23P (through-hole) | HSOP-24 - same | HSOP-24 - same |
| Typical Output Power | 2 x 100 W | 2 x 120 W | 2 x 100 W (same die) | 2 x 100 W | 2 x 150 W |
| Supply Voltage Range | +/-12.5 V to +/-30 V | +/-12.5 V to +/-30 V | +/-12.5 V to +/-30 V | +/-12.5 V to +/-30 V | +/-12.5 V to +/-36 V |
| Topology | Class-D | Class-D | Class-D | Class-D | Class-D |
| Output Configuration | Stereo SE or Mono BTL | Stereo SE or Mono BTL | Stereo SE or Mono BTL | Stereo SE or Mono BTL | Stereo SE or Mono BTL |
| Mute / Standby | Yes | Yes | Yes | Yes | Yes |
| Diagnostics Output | No | No | No | No | Yes (pins 10/12) |
| Lifecycle Status | NRND | NRND | NRND | Active | Active |
Diferenciadores clave
- Wide +/-30 V symmetrical supply tolerance (frente a TDA8950TH)
- No diagnostics functions on power pins (frente a TDA8954TH)
- Mature reference designs and DIY documentation (frente a TDA8920CTH)
Notas de diseño
The TDA8920BTH delivers 2 x 100 W from +/-30 V supplies with class-D efficiency (typically >90%), but at full power into 4 ohm the package still dissipates roughly 15-20 W of waste heat. The HSOP-24 package relies on its exposed thermal pad for cooling - per the NXP datasheet, this pad must be soldered to a PCB copper pour of at least 1 square inch (roughly 645 sq mm) on the top layer, plus thermal vias to inner copper planes. Without adequate heatsinking, the integrated overtemperature protection will trigger thermal shutdown during sustained high-power operation. Estimated: at 20 W dissipation with a 1 sq in copper pour, junction temperature rise above ambient is approximately 35-40 C, requiring design margin for ambient temperature inside enclosures.
Place the LC output filter components (typically 10-22 uH inductors and 0.22-1.0 uF capacitors) as close to the TDA8920BTH's OUT1A/OUT1B/OUT2A/OUT2B pins as possible. Keep the switching-current loop area (PWM output pin to inductor to capacitor to ground back to IC) minimal to reduce EMI radiation. Use a star-ground topology with separate analog and power ground returns joined only at the IC's GND pin. Bootstrap capacitors (pins 11/13/17/19) should be placed close to their respective pins with short traces to minimize PWM switching losses.
Per the NXP datasheet, the TDA8920BTH requires symmetrical +/-12.5 V to +/-30 V supplies with low-impedance bulk filtering. Use low-ESR electrolytic capacitors (4700-10000 uF per rail) close to the IC plus 100 nF ceramic bypass capacitors directly on the supply pins. Add a soft-start circuit on the power supply to limit inrush current; the IC's internal undervoltage protection will trigger shutdown if rails drop below the operating threshold, but supply ramping must be monotonic to avoid multiple mute/unmute cycles.
Common TDA8920BTH design pitfalls: (1) omitting the exposed thermal pad solder connection - causes thermal shutdown within seconds of full-power operation; (2) using too-small LC filter inductors - causes output-stage shoot-through and possible IC damage; (3) leaving the MODE pin floating - causes unpredictable BTL/SE selection; (4) failing to bypass the bootstrap capacitors properly - causes PWM distortion at low output levels; (5) exceeding +/-32 V supply (non-operating max) during power-up transients - can permanently damage the internal MOSFETs. Always include input TVS protection if the supply transformer can produce voltage spikes above +/-30 V under load-dump conditions.
Información de cumplimiento
RoHS compliant per NXP product page. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Halogen-free per NXP packaging documentation. NRND lifecycle status as of 2026-10-10; new designs should consider TDA8950TH or TDA8954TH active alternatives.
