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HomeProductsIntegrated Circuits (ICs)Linear - Amplifiers - AudioTAS5780MDCA
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TAS5780MDCA - Texas Instruments

Manufacturer Part Number
TAS5780MDCA
Manufacturer
Texas Instruments
Allelco Part Number
98D-TAS5780MDCA
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
40,398 pcs available, New & Original
Parts Description
IC AMP CLASS D STER 40W 48HTSSOP
Package
48-HTSSOP
Data sheet
TAS5780MDCA.pdf

PCN Design/Specification

Design 22/Feb/2022.pdf

HTML Datasheet

TAS5780M Datasheet.pdf
RoHs Status
ROHS3 Compliant
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In stock: 40398
  • Unit Price: $6.516
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Specifications

TAS5780MDCA Tech Specifications
Texas Instruments - TAS5780MDCA technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - TAS5780MDCA

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply 4.5V ~ 26.4V
Type Class D
Supplier Device Package 48-HTSSOP
Series -
Package / Case 48-TFSOP (0.240", 6.10mm Width) Exposed Pad
Package Tube
Product Attribute Attribute Value
Output Type 2-Channel (Stereo)
Operating Temperature -25°C ~ 85°C
Mounting Type Surface Mount
Max Output Power x Channels @ Load 40W x 2 @ 4Ohm
Features Short Circuit Protection
Base Product Number TAS5780

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99

Frequently Asked Questions(FAQ)

How does the TAS5780MDCA compare to other Class D amplifiers in terms of power delivery at 4 ohms, and what design implications does this have for audio system efficiency?
The TAS5780MDCA delivers 40W per channel into a 4-ohm load, which places it in the mid-to-high range of typical Class D performance for integrated solutions. This level of output supports compact speaker designs without requiring external amplification stages, but it demands careful thermal management due to the power conversion losses inherent in Class D operation. When compared to higher-wattage alternatives like 60W or 80W ICs, the TAS5780 offers sufficient headroom for most consumer audio applications while maintaining better efficiency than linear amplifiers. Engineers selecting this part must consider PCB layout constraints, heat dissipation paths, and supply voltage stability under full load to avoid thermal shutdown during sustained high-output playback.
What are the key differences between using the TAS5780MDCA in a single-ended versus bridged mono configuration, and how does each affect system-level power consumption and distortion?
The TAS5780MDCA is designed as a stereo (2-channel) amplifier and cannot operate in true bridged mode; instead, users can power two speakers simultaneously or drive one channel with the other muted or unused. Bridging typically involves combining outputs from two channels, which requires external circuitry and is not supported natively by this device. Using both channels in parallel increases total output power proportionally, but also doubles current draw from the supply rail. For mono operation, connecting both speakers in parallel across one channel reduces effective load impedance and may exceed the device’s 4-ohm minimum rating, risking overcurrent protection triggering. Therefore, stereo operation is recommended to preserve reliability and performance margins.
Can the TAS5780MDCA be used in battery-powered portable audio devices, and what challenges arise when operating from a single lithium-ion cell?
Yes, the TAS5780MDCA operates from 4.5V to 26.4V, making it compatible with a 1S Li-Ion battery (3.0–4.2V). However, the lower end of its supply range (4.5V) exceeds the typical cutoff voltage of many Li-Ion cells during discharge, limiting usable capacity unless a boost converter is implemented. Boost regulators add cost, size, and potential noise susceptibility. Additionally, Class D switching nature introduces conducted and radiated EMI that can interfere with sensitive analog front-ends in portable systems. Engineers must include proper filtering, grounding strategies, and possibly spread-spectrum modulation support if available to meet regulatory standards like FCC Part 15.
How does the short circuit protection feature in the TAS5780MDCA respond during a brief output short, and what recovery behavior should designers expect?
The TAS5780MDCA includes internal short-circuit protection that detects abnormal load conditions—such as direct connection between output pins or excessive current draw—and disables the output stage to prevent damage. Upon detecting a short, the device enters a low-power fault state and ceases PWM switching. Once the fault condition clears (e.g., speaker reconnected), normal operation resumes automatically after a built-in delay, assuming no persistent overload exists. Designers should verify that recovery time meets application requirements, as some systems rely on rapid restart capability after transient faults. It’s advisable to monitor fault flags via the I²C interface if available and implement software safeguards to log repeated events indicating marginal layout or component issues.
What impact do supply voltage variations have on the TAS5780MDCA’s output power, and how should decoupling be handled across the 4.5V to 26.4V range?
Output power scales approximately linearly with supply voltage within the specified range. At 4.5V, maximum power drops significantly compared to 24V operation—roughly half the headroom at 4.5V versus 24V. This means battery-powered designs experience reduced loudness and dynamic range early in discharge. To maintain stable performance, robust bulk and high-frequency decoupling is essential: use a combination of bulk capacitors (e.g., 10µF tantalum or ceramic) near the VDD pins and low-inductance ceramic capacitors (0.1µF, X7R or X5R) placed within millimeters of each pin. The wide voltage swing also stresses input bias circuits, so ensure bypassing accounts for potential ground bounce during fast transitions.
How does the operating temperature range of -25°C to 85°C influence long-term reliability in automotive or industrial environments?
While the -25°C to 85°C junction temperature range covers many commercial and light industrial applications, it falls short of AEC-Q100 Grade 1 (-40°C to +125°C) qualification required for full automotive deployment. In cold starts, semiconductor performance can degrade temporarily, affecting startup behavior or protection thresholds. At elevated temperatures, internal gate oxide reliability and bond wire migration risks increase, potentially shortening mean time between failures (MTBF). Engineers deploying the TAS5780MDCA in harsh environments should conduct accelerated life testing, derate power dissipation by 10–15%, and ensure adequate airflow or heatsinking even within the 85°C limit.
Why might the TAS5780MDCA exhibit audible artifacts at high gain settings, and how can these be mitigated through PCB layout or compensation?
Audible artifacts such as pops, clicks, or high-frequency noise during startup or gain changes stem from digital control signals transitioning before analog stages stabilize, especially when using I²C-based gain control or soft-start features. These transients couple into the power stage via parasitic inductance in traces or poor grounding. Mitigation includes minimizing trace lengths between digital control lines and IC pins, using star-ground topologies, and ensuring adequate power plane segmentation. Adding small RC networks (e.g., 10Ω + 100pF) at feedback nodes can dampen oscillations. Additionally, firmware should stagger gain ramp-up after enabling the amplifier to allow internal biases to settle.
How does the 48-HTSSOP package affect thermal performance, and what are realistic power dissipation limits for continuous operation?
The 48-pin HTSSOP (PowerTFSOP) uses exposed thermal pads and advanced packaging techniques for improved thermal conductivity over standard TSSOP variants. However, its thermal resistance (θJA) remains relatively high—typically 30–40°C/W depending on PCB copper area and airflow. At 40W output into 4Ω with ~90% efficiency, the TAS5780MDCA dissipates about 4W internally. Without forced cooling, this could raise junction temperature by 120–160°C above ambient, far exceeding the 85°C maximum. Therefore, designers must allocate substantial copper pour beneath the thermal pad, connect it directly to an internal ground plane, and consider adding vias to inner layers or even a small heatsink if space permits.
What considerations apply when cascading multiple TAS5780MDCA devices in multi-zone audio systems, and how is clock synchronization achieved?
Cascading multiple TAS5780MDCA units allows expansion beyond stereo configurations, but timing alignment becomes critical. Each device has independent internal oscillators, leading to phase misalignment and potential beat frequencies in overlapping zones. Texas Instruments provides optional master/slave configurations via I²C or dedicated sync pins, allowing one TAS5780MDCA to dictate clock timing to others. Proper implementation requires careful routing of sync lines to minimize skew (<1ns preferred) and matching propagation delays. Additionally, shared supply rails must be decoupled individually per device to prevent cross-talk. Firmware should coordinate startup sequences to avoid glitches during zone activation.
How does the TAS5780MDCA handle common-mode voltage swings at its inputs, and what input coupling strategy ensures compatibility with modern DSP-based audio sources?
The TAS5780MDCA accepts differential input signals centered around a virtual ground referenced to AVCC/2, typically set via an internal resistor divider. Input common-mode range is limited to near AVCC/2 ±1V, so single-ended signals from modern DSPs often require AC-coupling via series capacitors and biasing resistors. Improper biasing leads to clipping or DC offset accumulation in the output stage. Designers should implement precision voltage references (e.g., 2.5V LDO) for bias generation and select coupling capacitor values based on lowest expected audio frequency (e.g., 10µF for 20Hz cutoff at 8Ω load). Ensure input impedance matches source expectations to avoid loading effects that distort dynamics.
What role does dead-time control play in the TAS5780MDCA’s internal H-bridge drivers, and why is it important for minimizing shoot-through currents?
Dead-time control prevents simultaneous conduction of high-side and low-side MOSFETs in each half-bridge, which would cause destructive shoot-through currents. The TAS5780MDCA embeds programmable dead times (typically 100–500ns) to balance efficiency and crossover distortion. Too little dead time risks shoot-through; too much increases distortion and EMI. This internal management eliminates the need for external dead-time circuits but assumes matched gate drive characteristics. Mismatched external passives (e.g., unequal gate resistors) can disrupt optimal dead-time effectiveness, so layout symmetry and component tolerance consistency are vital.
How does the Moisture Sensitivity Level (MSL) 3 designation affect storage and handling for the TAS5780MDCA, particularly in high-volume manufacturing?
MSL 3 indicates the TAS5780MDCA must be stored in dry ambient conditions (<60% RH) and soldered within 168 hours (7 days) after removing from moisture-protective packaging. Beyond this window, bake-out procedures (e.g., 125°C for 24 hours) are required before reflow to prevent popcorning during thermal cycling. High-volume assemblers must integrate humidity monitoring and FIFO rotation into material handling workflows. Failure to adhere risks delamination, bond lift, or catastrophic failure post-assembly. Compliance with IPC/JEDEC J-STD-033 is strongly advised for reliable production yield.
What precautions are necessary when using the TAS5780MDCA with inductive loads like subwoofers, and how does back-EMF protection work?
Inductive loads such as subwoofers generate back-EMF when switched off, capable of exceeding the device’s absolute maximum ratings and damaging internal FETs. The TAS5780MDCA incorporates clamped body diodes and overvoltage protection diodes on outputs, but external snubber circuits (e.g., RC networks across each speaker terminal) further reduce ringing and voltage spikes. Additionally, flyback diodes (Schottky types rated >2× supply voltage) provide low-impedance paths for inductive kickback. Layout must keep speaker leads short and direct to minimize loop inductance, which exacerbates voltage transients.
How does the TAS5780MDCA’s efficiency vary across different load impedances and output levels, and what optimization strategies exist?
Efficiency peaks near 85–90% at medium-to-high output levels (e.g., 20W into 4Ω) but drops slightly at very low volumes due to fixed quiescent current draw. At light loads (e.g., 1W into 8Ω), efficiency declines because static power consumption dominates. The device does not support burst-mode or automatic gain control (AGC)-driven sleep modes, so continuous operation is assumed. To optimize efficiency in battery-sensitive designs, pair with class AB pre-amplification stages for low-level signals and switch to full Class D only during high-output segments—though this adds complexity. Alternatively, use external volume control before the TAS5780MDCA to keep input levels moderate.
What are the implications of using the TAS5780MDCA in systems requiring galvanic isolation, and how can safety certifications be maintained?
The TAS5780MDCA shares a common ground with its load, preventing true galvanic isolation. In medical or high-reliability safety-critical applications, additional isolation barriers (e.g., optocouplers, isolated DC-DC converters) must separate control signals and power supplies from patient-connected circuits. Certifications like IEC 60601 demand reinforced creepage distances and insulation materials. Using this IC in such contexts requires full system-level review against applicable standards, including leakage current limits and dielectric withstand testing. Isolation transformers or audio isolation amplifiers are typically inserted upstream of the TAS5780MDCA to meet these requirements.
How does the TAS5780MDCA’s I²C interface support real-time monitoring, and what diagnostic data is accessible for predictive maintenance?
The TAS5780MDCA exposes status registers via I²C for fault detection, thermal warnings, and operational states. Accessible data includes overtemperature alerts, short-circuit flags, undervoltage lockout (UVLO) status, and internal bias health indicators. These enable software-based health monitoring in networked audio systems or industrial equipment. Engineers can poll these registers periodically or configure interrupt-driven responses. Predictive maintenance benefits arise when historical fault patterns indicate degrading components (e.g., rising junction temps correlating with fan speed reduction). However, resolution is limited to binary flags—not continuous telemetry—so supplementary sensors (e.g., external thermistors) may be needed for finer granularity.
What trade-offs exist between using the TAS5780MDCA with analog versus digital inputs, and how does signal integrity differ?
Analog inputs require careful PCB layout to avoid noise pickup due to high-impedance nodes and long traces. Digital inputs (if available via I²S) offer superior noise immunity since signals ride on differential pairs with controlled impedance. The TAS5780MDCA likely accepts analog inputs directly, so shielding and star-point grounding become critical. In mixed-signal systems, digital audio streams minimize analog domain complexity but demand precise clock synchronization and jitter control. Choice depends on upstream architecture: legacy systems favor analog, while modern DSP platforms prefer digital for fidelity and flexibility.
How does the TAS5780MDCA compare to discrete Class D designs in terms of bill-of-materials (BOM) cost and design effort?
Integrated solutions like the TAS5780MDCA reduce BOM count by eliminating external op-amps, feedback networks, and protection circuits required in discrete designs. Total solution cost may be lower despite higher IC price per unit. Design effort decreases significantly due to simplified schematic capture, automated layout assistance, and built-in diagnostics. However, discrete approaches offer greater customization for unique impedance matching, exotic speaker types, or extreme power requirements. For most consumer electronics, the TAS5780MDCA strikes an optimal balance between integration benefits and functional predictability, reducing time-to-market and validation overhead.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments TAS5780MDCA

Product Attribute TAS5782MDCAR TAS5782MDCA TAS5768MDCA TAS5768MDCAR
Part Number TAS5782MDCAR TAS5782MDCA TAS5768MDCA TAS5768MDCAR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Type - - - -
Voltage - Supply - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Base Product Number - DAC34H84 MAX500 ADS62P42
Features - - - Simultaneous Sampling
Max Output Power x Channels @ Load - - - -
Series - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C

TAS5780MDCA Datasheet PDF

Download TAS5780MDCA pdf datasheets and Texas Instruments documentation for TAS5780MDCA - Texas Instruments.

PCN Design/Specification
Design 22/Feb/2022.pdf
HTML Datasheet
TAS5780M Datasheet.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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TAS5780MDCA Image

TAS5780MDCA

Texas Instruments
98D-TAS5780MDCA

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