TDA7297 VS TDA7266: What Is The Difference?

In audio equipment, the power amplifier is one of the crucial components. It can amplify low-voltage, low-current signals into high-voltage, high-current signals, thereby increasing output power. Among them, TDA7297 and TDA7266 are two audio power amplifier integrated circuits that have attracted widespread attention. Next, we will conduct a detailed comparison between these two components in terms of pinout, specification, sound quality, usage techniques, circuits and application.

Ⅰ. Overview of TDA7297

TDA7297 is a stereo audio power amplifier integrated circuit produced by ST Microelectronics. It was mainly used in televisions, audio and other equipment in the early days. It is a two-channel stereo power amplifier integrated circuit with mute control function. It has a wide range of operating voltage, can provide high output power, and has overheating, short circuit and other protection functions. It adopts a single-row, double-row 15-pin package design, giving it more stable performance. In addition, its operating voltage range is very wide, between 6.5V and 18V, while the operating current is 2A. In this way, its power consumption can reach 33W, allowing it to maintain excellent performance under high load conditions. Moreover, its operating temperature range is very wide, ranging from 0°C to 70°C.

This integrated circuit contains two audio signal power amplification circuits, which can realize stereo amplification function and has mute and standby control functions. It is suitable for use in a variety of household appliances and electronic devices, such as TVs, stereos, headphones, speakers, etc., providing excellent sound quality and stable signal output. During use, we only need to configure and connect reasonably according to the specifications and requirements of the corresponding equipment to give full play to its performance advantages.

Replacement and equivalent：

•  TDA7294V

•  TDA7265

•  TDA7266

•  TDA7266S

Ⅱ. Overview of TDA7266

TDA7266 adopts single row 15-pin Multiwatt-15 package, which is very convenient to use. Its operating voltage is 3 V to 18V, the output power is 7W, and the gain is 26dB. It is mainly composed of two audio power amplifier circuits with the same functions, a squelch control circuit, a standby control circuit, as well as overheating protection and short-circuit protection circuits. It is a stereo audio power amplifier circuit, containing two BTL audio power amplifier circuits, with standby and mute control functions as well as overheating and short-circuit protection functions.

In addition, TDA7266 has three integrated blocks of the same series, such as TDA7266 S/SA, TDA7266L and TDA7266M. These products differ slightly in structure and function. For example, TDA7266M is a 7W mono power amplifier circuit in a 15-pin package, while TDA7266L is a 5W mono power amplifier circuit in a 10-pin package.

Replacement and equivalent：

•  TDA7294V

•  TDA7297

•  TDA7266S

Ⅲ. Pin connection 

In fact, both kinds of chips have the same pinout and can use the same PC board layout.

Ⅳ. Specification comparison

From the chart above, we can see that both are identical in terms of power consumption and current. However, the TDA7297 has a higher op amp gain, so it has better stability and takes up less space. Through comprehensive upgrades, its performance has been significantly improved. In addition, TDA7266 has better sound quality, and its price advantage is obvious compared to TDA7297.

Ⅴ. Symbol

Ⅵ. Sound quality comparison

The sound quality of both TD7266 and TD7297 is very good, and the reciprocity of the music signal is also very high, but the TD7297 performs much better in some details. For those who like to listen to pop music or electronic music, TDA7297 can better reflect the characteristics of various musical instruments in the high notes. For people who like to listen to light music or classical music, the sound quality of TDA7266 will be better.

Ⅶ. Usage techniques comparison 

TDA7297 is more operable. Because it has a more flexible PIN pin design and supports breakers when used, it can be adjusted and bridged on its own. In addition, TDA7297 also has a usage technique. It needs to output an analog signal at the aluminum ohm of the power section to adjust the volume and other control operations.

The use of TDA7266 is quite easy. Usually the locations of various components are clearly marked on the circuit board. We only need to wire according to the markings. However, it should be noted that since the TDA7266 is a two-channel design, we need to pay attention to related issues such as volume control and channel switching.

Ⅷ. Circuit diagram

Ⅸ. Application comparison 

Finally, let us look at performance. The TDA7266 has an output power of 7W, while the TDA7297 has an output power of 15W. Because of its higher power output capability, the TDA7297 is better suited for applications that require more amplification power to drive larger or louder speakers. It is commonly used in car audio systems, home audio amplifiers, and other audio equipment requiring higher power.

TDA7266 has a lower power output and is suitable for some electronic products that require stable performance and smaller size, such as portable speakers, headphone amplifiers and smaller audio amplification requirements.

Frequently Asked Questions

1. What is the equivalent of TDA7297?

It is general use and is suitable for audio signal amplifiers, medium power amplifiers, dual/split power supply, and as well as stereo audio applications. You could use TDA7266 or TDA7265 as TDA7297 equivalents.

2. What is the use of TDA7297?

A strong TDA7297 chip is a digital power amplifier chip, with low idle loss characteristics, which makes it work well and quickly. Onboard, front-facing IC to improve the input sensitivity, high-definition sound quality. It can be used for car vehicle computer speaker, family audio and video, and empty square.

3. What is the voltage of TDA7266?

The TDA7266 is a dual bridge amplifier specially designed for TV and portable radio applications. VCC = 11 V, RL = 8 Ω, f = 1 kHz, Tamb = 25 °C unless otherwise specified.

4. Is TDA7297 good?

Probably sounds fine as an audio amp, but I needed it for amplification of a signal generator's sine wave. Output was occasionally ok but often noisy and varying in amplitude. Output just doesn't faithfully replicate the input. And heat sink for very warm right away and i wasn't even pulling 50 mW out of it.

5. What is the difference between TDA7266 and TDA7297?

The TDA7266 can also run from a lower voltage of 3V. This all implies that the TDA7266 is really more suited to lower voltage applications and should you have a higher voltage, higher power use case, I'd recommended to go for the TDA7297 instead of pushing the TDA7266.