TDA7498 vs TPA3255 | Fosi Audio Review

Explore the features and comparisons of the TDA7498 amplifier, including its performance against models like TPA3255 and TPA3116. Discover insights from reviews, and gain access to the TDA7498 Reference Manual. Whether it's the amplifier board, circuit diagrams, or Bluetooth capabilities, find all the essential details you need.

Brands: STMicroelectronics

Download: TDA7498 Datasheet PDF

Price: inquiry

In Stock: 13,862

Output Type: 2-Channel (Stereo)

Max Output Power x Channels@Load: 100W x 2 @ 6Ohm

Voltage-Supply: 14V ~ 39V

Package: PowerSSO-36 EPU

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TDA7498 vs TPA3255

Key differences between the TDA7498E and TPA3255 IC circuit designs:
TDA7498E Circuit VS TPA3255 Circuit 1 scaled

Function Module	TDA7498E Circuit Characteristics	TPA3255 Circuit Characteristics
Input Mode	Supports stereo, single-ended, and mono-bridge input modes via jumpers (e.g., J7, J8). Uses coupling capacitors (C1, C2: 1μF) for DC isolation.	Offers up to four input channels (A, B, C, D), each using 10μF coupling capacitors for DC isolation. Fixed input configuration without jumpers.
Output Mode	Allows configuration of Mono (BTL) or Stereo via external jumpers. Uses external LC filter (8Ω resistor, inductors) for speaker output.	Provides various modes: Stereo BTL, Mono PBTL, or 2.1 modes. Employs LC filters with larger inductors (15μH) for improved output filtering.
Gain Adjustment	Adjustable gain (23.6dB~35.6dB) via external jumpers (J9~J12) by selecting external resistor networks.	Gain internally fixed by IC design; external adjustable gain jumpers are not provided. External components must match internal gain configuration.
Oscillation Frequency Adjustment	Implements frequency shifting for EMC performance using an external transistor circuit (Q1: KTC3875), resistors, and capacitors.	Uses a single external resistor (22kΩ) for oscillator frequency adjustment without additional transistor circuits.
Power Supply Design	Dedicated 3.3V regulator IC (L4931) supplies power to control circuitry, accompanied by comprehensive decoupling capacitors.	No dedicated external regulator for logic circuits; logic power integrated within IC, requires only a single external power source (PVDD).
Protection Mechanisms	Employs multiple external diodes (D2~D8) and RC networks for robust overcurrent and overvoltage protection.	Primarily utilizes internal protection circuitry; fewer external protective components required.
Mute and Standby Features	Provides clear MUTE and STBY control via dedicated pins and external switches (S1, S2) for manual operation.	Features pins such as RESET, FAULT, and CLIP_OTW for reset, fault, and thermal warning indication. No dedicated MUTE/STBY pins, relying on internal logic and external microcontroller interaction.
Filtering and Stability	Complex filtering design at output with multiple capacitors (220nF, 1μF) and resistors (8Ω) enhancing signal stability and EMI suppression.	Streamlined output filtering circuit with fewer components (1μF, 1nF, 10nF) emphasizing efficient, simplified designs and good EMI performance.
Circuit Complexity	Higher circuit complexity with numerous external components and jumpers, offering flexibility in function and customization.	Lower circuit complexity, emphasizing efficiency, simplified external components, suitable for compact and efficient designs.