IRS2092S Audio Amplifier Technical Parameters, Alternatives, Applications and Other Details
25 January 2024
Ⅲ. Technical parameters of IRS2092S
Ⅴ. Circuit diagram of IRS2092S
Ⅶ. What should we pay attention to when using IRS2092?
IRS2092S is a high-performance digital power amplifier integrated circuit suitable for various audio applications such as professional audio systems, home theaters, and car audio. By introducing the manufacturer, technical parameters, working principle and application of IRS2092S, we can better understand the characteristics and advantages of this device and provide a reference for subsequent circuit design.
IRS2092S is a Class D audio amplifier driver. Not only does it feature a PWM modulator and protection features, but it also operates at high voltage and performance levels. By combining two external MOSFETs with some other external components we can easily create a protected class D audio amplifier. In addition, IRS2092S uses digital control technology to provide high-efficiency, high-fidelity and low-distortion audio output. Its working principle is based on resonance control technology, which can convert audio signals into high-quality output power and can even drive kilowatt-level loads.
Alternatives and equivalents:
• IRS2093
The IRS2092S is a Class D audio amplifier driver manufactured by International Rectifier (now Infineon Technologies). As a global leader in power semiconductors and management solutions, IR's analog and mixed-signal integrated circuits, advanced circuit devices, integrated power systems and devices are widely used to drive high-performance computing equipment and reduce energy consumption of motors. As part of Infineon Technologies' overall semiconductor portfolio, the IRS2092S continues to be used in many applications including automotive, satellite, lighting, aircraft and defense systems as well as key components in power systems based on electronics, especially microcomputers, servers, networks and telecommunications equipment.
• Its power consumption is 1W.
• Its bandwidth is 20 kHz.
• Its output current is 1.2 A.
• It is manufactured by Infineon.
• Its power supply voltage is 10V to 18V.
• Its operating temperature is - 40°C to 125°C.
• Its installation method is SMD or SMT.
• IRS2092S belongs to the category of audio amplifiers.
• IRS2092S has 16 pins and comes in SOIC-16 package and tube packaging.
• The rise time (Max) of the IRS2092S is 50 ns, and its fall time (Max) is 35 ns.
First, an audio input signal is passed to the IRS2092S. This input signal is usually the output from an audio source, such as a music player, TV, or other audio device. The IRS2092S contains a comparator that compares the input signal to a feedback signal. The feedback signal is usually a small portion of the output from a power amplifier that is passed through a feedback loop to the comparator. When the amplitude of the input signal exceeds the amplitude of the feedback signal, the comparator triggers the generation of Pulse Width Modulation (PWM). The duty cycle (i.e., the ratio of time at high level to one cycle) of the PWM signal depends on the amplitude of the input signal.
In addition, the IRS2092S incorporates a number of protection features to ensure the safe operation of the power amplifier. These include over-current protection, over-temperature protection, etc. The PWM signal is passed to the output stage of the power amplifier. Typically, this stage includes MOSFETs used to control the power switching tubes. Depending on the duty cycle of the PWM signal, the power switching MOSFET switches in the direction of the current, converting the input signal into a pulse signal. Since the PWM signal is rich in harmonics in the frequency domain, an output filter is usually required to convert it to an analog audio signal. This filter usually includes an LC filter to remove high frequency noise.
• Home theater systems: The IRS2092S finds widespread application as an audio amplifier module within home theater setups. Its excellent performance and minimal power requirements make it well-suited for integration into home theater systems, delivering superior audio amplification with energy efficiency.
• Power amplifier module: The IRS2092S is often used as a power amplifier module because of its powerful power amplification that can be integrated into audio devices such as headphones, speakers, and so on. These devices often require additional power to drive, so the integration of the IRS2092S can provide the required performance.
• Car audio systems: The IRS2092S can be used to drive speakers in the car to provide clear, powerful audio effects in the vehicle. The IRS2092S offers higher efficiency and lower power consumption than conventional car audio driver chips. Its high efficiency allows it to provide excellent audio performance even under automotive power conditions.
• Audio system IC: The IRS2092S, as an IC, integrates many features required for audio systems, such as over-temperature protection, over-current protection, and over-voltage protection. These features make the audio system safer and more stable during operation. Compared with peripheral components, the IRS2092S is more integrated and easier to use, which reduces the need for peripheral components, thus reducing the cost and complexity of the system.
1. Regarding the overcurrent protection setting value issue:
(1) Selection of current protection threshold: The current flowing through the FET includes the audio output and LPF filter network current, so the actual required setting value should be higher than the peak value of the audio current. A recommended selection method is: the maximum output current of the power amplifier at saturated output×1.5.
(2) Selection of RDSON: It can be selected according to the actual maximum operating temperature. Usually, the RDSON value at 85°C can be selected.
(3) IC protection value selection: With the current and RDSON data, we can select the IC protection value. It should be noted that under high current conditions, the switching waveform of the FET should be a clean square wave. If there are burrs, we can appropriately increase the gate resistance and optimize the decoupling structure.
(4) Regarding DC output issues: Under heavy load conditions, the power supply voltage may drop. However, due to the positive and negative asymmetry of the transformer or load, the positive and negative power supply voltages drop inconsistently, causing a certain half-wave of the power amplifier to saturate the output in advance. When this problem occurs, it's usually not the amplifier's fault. We can try to solve it by slightly increasing the power supply voltage and increasing the pond capacitance.
2. Under ideal working conditions, the shorter the actual dead time of the half-bridge, the better, and it can even be set to a minimum of 10 nanoseconds.
3. Issues that should be paid attention to when using IRS2092S as a full-range power amplifier
(1) Component selection: Priority should be given to components with better linearity.
(2) Modulation frequency: It is recommended to choose a modulation frequency of 300KHz to 400KHz.
(3) LC filter matching: The L/C value of the LC filter should be appropriately matched. In order to better solve certain problems, it is recommended that L be 18~22μH.
(4) Flatness improvement: To further improve flatness, L can be taken to 10μH, and the modulation frequency can be increased to about 400KHz.
Frequently Asked Questions
1. What is the replacement and equivalent of IRS2092S?
You can replace the IRS2092S with IRS2093, TPA3255DDV, or TPA3255DDVR.
2. What is IRS2092S?
The IRS2092S is a digital audio amplifier (Class D Amplifier) controller produced by International Rectifier (now Infineon Technologies).
3. What is an amplifier?
An electrical or electronic amplifier is a circuit that uses an external power supply to generate an output signal that is a larger replica of its input. An audio amplifier (an easily recognizable application) is used to increase the volume of a speaker's voice so they can be heard more easily in large areas.
4. How to use IRS2092S?
When using the IRS2092S, you need to connect appropriate peripheral components such as inductors, capacitors, etc. to build a complete Class-D audio amplifier circuit. Typically, manufacturers provide relevant application circuits and design recommendations to ensure performance and stability.
