TDF8546TH/N2Z - 4x45W I2C BTL Car Audio Amp | NXP
MPN: TDF8546TH/N2Z ✗ Cuối đờiTDF8546TH/N2Z Tóm tắt
A BTL Class-AB automotive amplifier is a fully-differential output stage that drives each speaker across two half-bridges, eliminating the need for a large DC blocking capacitor and doubling the voltage swing at the load. The TDF8546TH/N2Z sits inside the broader taxonomy of audio power amplifier -> automotive Class-AB amp -> quad BTL amplifier -> semiconductor. By integrating four channels into one IC with full I2C diagnostics, the part replaces designs that historically required multiple amplifier ICs and discrete protection circuitry.
Key differentiating specifications: 4 x 45 W output power into 4 ohm at 14.4 V supply, I2C-bus controlled diagnostics (clip detection, thermal pre-warning, short-circuit, load-dump, and start-up diagnostics), best-efficiency mode for reduced quiescent dissipation, and operation down to 6 V battery voltage for stop/start vehicles. The HSOP-36 package exposes a metal heatsink tab on the top surface that must be soldered to a copper pour to dissipate the typical 4 x 12 W class-AB dissipation envelope.
Architecturally, the TDF8546TH/N2Z uses an N-channel MOSFET output stage with a charge-pump-generated negative rail, enabling true ground-referenced BTL outputs. Four independently controlled channels share an I2C address that supports diagnostics read-back, mute control, and operating-mode selection. Best-efficiency mode dynamically adjusts the supply rail to minimize dissipation at lower output levels, an unusual feature for a Class-AB part and one that mimics the low-rail advantage of Class-D without the EMI complexity.
Typical applications include automotive head-unit internal amplifiers, external amplifier boosters (plug-and-play behind the head-unit), and active speaker modules. The 6 V minimum supply makes it uniquely suited for vehicles with engine stop/start systems that drop the battery rail during cranking.
Design consideration: the HSOP-36 heatsink tab requires a minimum 30 x 30 mm copper pour on the PCB and at least 9 thermal vias to the opposite layer. Without this, junction temperature exceeds 150 C under full 4-channel drive and the part enters thermal shutdown.
This page synthesizes distributor pricing, drop-in same-package alternatives from the TDF8546 platform, and practical heatsink-layout guidance not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho TDF8546TH/N2Z — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TDF8546TH/N2Z (cùng hình factor và footprint) — khác nhau ở Diagnostics, Mounting Type, Operating Temperature, Output Channels, Product Type.
TDF8546AJV/N1ZJ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TDF8546JV/N2ZU
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TDF8546ATH/N1ZJ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TDF8546TH/N2
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TDF8546TH/N2ZJ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TDF8546TH/N2Z Tỷ lệ tối đa & tính chất điện
| Product Type | Quad BTL Class-AB Automotive Audio Amplifier |
| Output Channels | 4 (Quad, BTL) |
| Output Power | 4 x 45 W into 4 ohm (14.4 V supply, THD = 10%) |
| Supply Voltage Range | 6 V to 18 V (battery), 24 V load-dump tolerant |
| Minimum Operating Voltage | 6 V (stop/start compatible) |
| Output Stage | N-channel MOSFET BTL with charge-pump |
| Amplifier Class | Class AB with best-efficiency mode |
| Control Interface | I2C-bus (diagnostics, mute, mode select) |
| Diagnostics | Clip, thermal pre-warning, short-circuit, load-dump, start-up |
| Hộp | HSOP-36 (Heatsink Small Outline Package, 36 leads) |
| Kiểu lắp đặt | Surface Mount (exposed thermal pad) |
| Nhiệt độ hoạt động | -40 C to +85 C |
| Mute / Standby | I2C controlled |
| Load Impedance | 4 ohm (per channel, BTL) |
| Trạng thái RoHS | Compliant |
| AEC-Q100 | Qualified (automotive grade) |
Hướng dẫn cấu hình chân TDF8546TH/N2Z hsop-36 (heatsink small outline package, 36 leads)
Cấu hình chân cho TDF8546TH/N2Z (hsop-36 (heatsink small outline package, 36 leads) gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho TDF8546TH/N2Z.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
TDF8546TH/N2Z phù hợp cho 6 Áp dụngs: Automotive Head-Unit Internal Amplifier, External Plug-and-Play Amplifier Booster, Active Speaker Module with Integrated Amp, Engine Stop/Start Audio Bridge, Heavy-Duty Truck / 24V System Audio, Marine and Powersport Audio Systems.
Automotive Head-Unit Internal Amplifier
The TDF8546TH/N2Z is purpose-built for automotive head-unit internal amplifier stages where 4 x 45 W into 4 ohm drives front and rear speakers directly from the head-unit PCB. The HSOP-36 package's exposed thermal tab allows integration into the same chassis as the head-unit's tuner and DSP without a separate amplifier module. The 6 V minimum supply ensures audio continuity during engine stop/start cranking events, a critical requirement for modern vehicles. I2C diagnostics report clip, thermal, short-circuit, and load-dump faults back to the head-unit microcontroller for driver information displays. Compared to Class-D alternatives like the TAS6424QDKQRQ1, the TDF8546TH/N2Z's Class-AB topology eliminates output LC filters and EMI shielding, simplifying the head-unit BOM.
Được đề xuất
External Plug-and-Play Amplifier Booster
The TDF8546TH/N2Z powers aftermarket amplifier boosters that connect between the factory head-unit and the vehicle speakers. Its 4 x 45 W output drives mid-range and full-range speakers without requiring a second amplifier module, while the I2C-bus interface allows the booster to report faults back to an installer diagnostic tool via a UART bridge. Best-efficiency mode reduces quiescent current draw when the audio is muted, preserving battery life in vehicles that park for weeks. The wide 6-18 V supply range handles voltage transients on long factory wiring harnesses without false fault triggering. The exposed HSOP-36 thermal tab mounts to the booster chassis for passive cooling.
Được đề xuất
Active Speaker Module with Integrated Amp
The TDF8546TH/N2Z suits premium active speaker modules where each enclosure contains a dedicated amplifier channel. By placing one BTL channel inside each speaker box, the design eliminates speaker-wire losses on long runs and enables per-channel DSP optimization. The 4-channel architecture lets one IC drive a left-front, right-front, center, and subwoofer pair from a single supply rail. AEC-Q100 qualification ensures the active speaker survives under-hood temperatures near firewall mounting positions. The HSOP-36 exposed tab mounts directly to the speaker's metal back-plate, providing a heatsink that scales with speaker size.
Được đề xuất
Engine Stop/Start Audio Bridge
The TDF8546TH/N2Z's 6 V minimum operating voltage uniquely qualifies it for vehicles with engine stop/start systems that drop the battery rail below 8 V during cranking. While competing amplifiers mute or pop during the cranking event, the TDF8546 continues to deliver audio, allowing the infotainment system to remain audible. Combined with I2C start-up diagnostics, the host MCU can confirm the amplifier is online before passing audio. The NXP datasheet specifies cranking-transient behavior at 6 V minimum, eliminating the need for external boost regulators. This makes the TDF8546TH/N2Z the reference design choice for stop/start-compatible aftermarket amplifiers.
Được đề xuất
Heavy-Duty Truck / 24V System Audio
The TDF8546TH/N2Z tolerates 24 V load-dump transients found in heavy-duty truck and commercial-vehicle electrical systems. With maximum 18 V continuous battery and 24 V transient tolerance, the IC survives jump-start events and alternator load-dump without external protection. The I2C diagnostics report the transient event to the host MCU for fault logging. Quiescent current is minimized via best-efficiency mode during long-haul idle periods, preserving battery life. AEC-Q100 grade 1 qualification covers the wide -40 C to +85 C commercial-vehicle temperature range, including engine-bay-adjacent mounting.
Được đề xuất
Marine and Powersport Audio Systems
The TDF8546TH/N2Z powers marine and powersport audio amplifiers where 12 V battery systems with frequent voltage dips are common. The 6 V minimum supply rides through engine cranking on outboard motors and ATVs, while the exposed thermal tab couples to the chassis for vibration-resistant cooling. The I2C diagnostics are accessible to the marine display head-unit for fault reporting through NMEA networks. Best-efficiency mode extends battery life during long mooring periods with audio playing. The HSOP-36 package is conformal-coating compatible for marine humidity protection.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TDF8546TH/N2Z — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | TDF8546AJV/N1ZJ | TDF8546JV/N2ZU | TDF8546ATH/N1ZJ | TDF8546TH/N2 | TDF8546TH/N2ZJ |
|---|---|---|---|---|---|---|
| Package | HSOP-36 | HSOP-36 - same | HSOP-36 - same | HSOP-36 - same | HSOP-36 - same | HSOP-36 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Output Power (per channel, 4 ohm) | 45 W | 45 W | 45 W | 45 W | 45 W | 45 W |
| Minimum Supply Voltage | 6 V (stop/start) | 6 V | 6 V | 6 V | 6 V | 6 V |
| Control Interface | I2C-bus | I2C-bus | I2C-bus | I2C-bus | I2C-bus | I2C-bus |
| Diagnostics | Full (clip, thermal, SC, load-dump, start-up) | Full (improved) | Full | Full | Full | Full |
| Best-Efficiency Mode | Yes | Yes (improved) | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Only platform variant with officially sanctioned EOL redesign path (vsTDF8546AJV/N1ZJ)
- Stop/start capability at 6 V minimum supply (vsClass-D amplifier TAS6424QDKQRQ1)
- Full I2C diagnostic reporting (vsTDF8546ATH/N1ZJ)
Ghi chú thiết kế
Estimated: at 4 x 45 W into 4 ohm at 14.4 V supply, total Class-AB dissipation reaches approximately 40 W. The HSOP-36 exposed thermal tab requires a minimum 30 x 30 mm copper pour on the top PCB layer with at least 9 thermal vias (0.3 mm drill, 1 mm pitch) to the bottom layer. Without adequate copper, junction temperature exceeds 150 C and the I2C thermal pre-warning flag triggers. In enclosed head-unit chassis, supplement with a chassis-mounted heatsink bonded to the HSOP-36 tab using a thermal pad.
Place the I2C pull-up resistors (typically 4.7 kohm to 3.3 V) close to the TDF8546TH/N2Z SDA and SCL pins. Keep the I2C traces away from the BTL output traces to avoid coupling digital control noise into the audio path. Route the four BTL output pairs as differential pairs with a ground plane beneath, and add 100 nF decoupling capacitors on each supply pin placed within 2 mm of the IC.
Do not confuse /N2 (tray packing) with /N2Z (tape-and-reel) for SMT assembly lines; both share identical silicon and pinout. Do not exceed 24 V on the supply pin even momentarily - load-dump tolerance is for transient events only, not continuous operation. Always configure the I2C address correctly via the ADR pin; default address conflicts with other NXP audio ICs sharing the same bus.
Estimated: star-ground the four BTL output returns to a single point near the IC's GND pin to minimize ground-loop noise. Use a 4-layer PCB with a dedicated ground plane beneath the HSOP-36 footprint; the exposed pad must be soldered to this ground plane through 9+ thermal vias. Keep high-current BTL output traces at least 3 mm wide to handle the peak 4 A per channel current without IR drop.
Thông tin tuân thủ
AEC-Q100 qualified for automotive applications per NXP product page. RoHS compliant per NXP datasheet. Halogen-free status not stated in the provided web data.
