TDA7850 STMicroelectronics Integrated Circuit (Transistor Outline, Vertical) In Stock
The TDA7850 is a quad-channel Class AB audio power amplifier IC from STMicroelectronics, delivering 80W nominal output power across 4 channels with 26dB gain and 20kHz bandwidth for automotive audio applications. Features 4-channel balanced BTL output configuration with short-circuit and thermal protection in a 25-pin Flexiwatt package. Available with RoHS compliance, competitive pricing, and worldwide in-stock distribution.
- Manufacturer
- STMicroelectronics
- Package
- Transistor Outline, Vertical
- Pin Count
- 25
- Lifecycle
- ACTIVE
- Datasheet
- TDA7850 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.9300(MOQ 10)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 80W nominal total output power across 4 independent Class AB channels enabling high-power 4-channel car audio amplification from a single IC
- 26dB fixed gain with 20kHz audio bandwidth covers the full audible frequency range with low harmonic distortion for high-fidelity automotive sound
- Integrated protection features including short-circuit protection, thermal shutdown, and load dump protection ensure reliable operation in harsh automotive environments
- Compact 25-pin Flexiwatt power package (JEDEC R-XZIP-T25) with integrated heatsink tab simplifies thermal management in space-constrained car audio systems
Applications
The TDA7850 is primarily designed for automotive head unit and aftermarket car audio amplifier applications, where it drives four speakers in a full-range stereo or 4-channel surround sound configuration directly from 12V automotive battery supply. Its integrated protection circuitry and robust package make it suitable for under-dashboard and trunk-mounted amplifier modules in passenger vehicles, motorcycles, and marine audio systems. The device is also used in home mini hi-fi systems and compact powered speaker designs requiring multi-channel Class AB amplification with minimal external components.
Specifications
| YTEOL | 5 |
| Bandwidth-Nom | 20kHz |
| Consumer IC Type | CLASS AB AUDIO AMPLIFIER |
| Gain | 26dB |
| Harmonic Distortion | 10% |
| JESD-30 Code | R-XZIP-T25 |
| JESD-609 Code | e3 |
| Number of Channels | 4 |
| Number of Functions | 1 |
| Output Power-Nom | 80W |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | ZIP25,.16,.16,40 |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Qualification Status | Not Qualified |
| Supply Current-Max | 280mA |
| Supply Voltage-Max (Vsup) | 18V |
| Surface Mount | NO |
| Technology | MOS |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 1mm |
| Terminal Position | ZIG-ZAG |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Mainland China |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TDA7850:
suggested
suggested
Frequently Asked Questions
What is the output power and number of channels of the TDA7850?
The TDA7850 delivers 80W nominal total output power across 4 independent Class AB audio channels, configured as 4 x 20W BTL (bridge-tied load) outputs. This makes it capable of driving four 4-ohm car speakers simultaneously, providing full 4-channel audio amplification in a single IC for automotive head units and aftermarket car amplifier boards.
What is the audio bandwidth and gain of the TDA7850?
The TDA7850 has a nominal audio bandwidth of 20kHz, covering the entire human audible frequency range from 20Hz to 20kHz. The fixed voltage gain is 26dB, which provides sufficient amplification for standard line-level audio signals from car head units (typically 0.3V to 2Vrms) to drive speakers at full output power without external gain-setting resistors.
What protection features does the TDA7850 include?
The TDA7850 integrates multiple protection mechanisms including thermal shutdown (activates when die temperature exceeds safe limits), short-circuit protection on all output channels, load dump protection for automotive battery voltage transients, and reverse polarity protection. These features protect both the IC and connected speakers from fault conditions common in automotive electrical environments, ensuring system reliability.
What package does the TDA7850 use and how is thermal management handled?
The TDA7850 uses the 25-pin Flexiwatt package (JEDEC R-XZIP-T25), which is a single inline plastic package with an integrated metal heat-spreading tab. The Flexiwatt package is designed for mounting directly to a heatsink or chassis via the tab, enabling efficient thermal dissipation of the power dissipated during high-output audio playback, which is critical for sustained high-power Class AB operation.
What are typical applications for the TDA7850 and are there alternative amplifier ICs?
The TDA7850 is used in automotive head units, aftermarket car amplifiers, motorcycle audio systems, and compact home audio equipment. Comparable alternatives include the TDA7560 and TDA7388 from STMicroelectronics for similar 4-channel car audio applications, and the TDA7850A as an enhanced version. The TDA7850 is preferred in cost-sensitive designs where a complete 4-channel 80W solution in a through-hole Flexiwatt package is required with minimal external circuitry.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $6.5800 | $65.80 |
| 17+ | $6.2900 | $106.93 |
| 34+ | $6.0800 | $206.72 |
| 100+ | $5.3800 | $538.00 |
| 170+ | $3.9800 | $676.60 |
| 425+ | $3.9300 | $1670.25 |
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