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This section provides an overview for pwms as well as their applications and principles. Also, please take a look at the list of 14 pwm manufacturers and their company rankings. Here are the top-ranked pwm companies as of January, 2025: 1.MathWorks, 2.Gartner, Inc., 3.Delta Electronics Americas Ltd..
Table of Contents
A PWM stands for "pulse width modulation" and is a technology for generating pulse waves of various widths. Pulse waves are digital signals, but by combining various pulse waves, they can be converted into various pseudo-analog signals, including sine waves.
A PWM is a technology that modulates the pulse width with a fixed period. There is also a PFM technology that modulates the frequency with a constant pulse width, but both are used for switching between energized and de-energized.
PWMs are used to control the voltage of power supplies and to control the energizing and de-energizing cycles of semiconductors. In particular, it is often used to control DC motors efficiently. By controlling the time of voltage application to the motor, it is possible to control the running voltage.
In addition, when generating modulated AC current in an inverter circuit, PWMs can be used to generate pulse voltages with various widths, which can then be synthesized to perform DC-AC conversion. PWMs are used not only in inverter circuits but also in controlling switching power supplies and dimming LEDs without affecting the light color.
PWM circuits, which perform pulse width modulation, use transistors to generate pulse waves of various widths by repeatedly switching the circuit on and off.
PWMs modulate the pulse width over a fixed period, so the duty cycle is varied. The duty cycle is the pulse width divided by the period, expressed in "% (percentage)." In voltage control, the running voltage is the product of the pulse voltage and duty cycle, and a duty cycle of 100% is the same as when a DC power supply is used.
When voltage control is performed using PWMs, the power supply is turned off for a period, which makes it more power efficient than using a DC power supply that works steadily. In addition, in digital circuits such as microcontrollers, pseudo-analog signals can be generated simply by synthesizing pulse waves, making it possible to construct analog conversion circuits composed entirely of digital circuits without the use of D/A converters or other devices.
When dynamically controlling a load with an electronic circuit, there are two methods: one is to control the load with a constant voltage and the other is to control the load with a constant current, and the other is to control the load with PWMs.
Recently, more energy-efficient methods have become the trend due to environmental and energy issues. The reasons for the low efficiency of linear methods, such as constant voltage control and constant current control, are as follows.
For example, if a regulated power supply with a maximum voltage of 10 V and current capacity of 2 A is used at 5 V 2 A, the power loss consumed in the power supply circuit is (12 V - 5 V) x 2 A = 14 W when the input voltage of the power supply is 12 V. The power consumed in the load is 5 V x 2 A = 10 W.
The power consumed by the load is 5V x 2A = 10W. 1.4 times the power consumed by the load is consumed as a loss in the circuit. This is not only wasteful power consumption but also increases the cost, size, and weight of the circuit due to the large number of components used.
On the other hand, PWM control does not change the output voltage but varies the pulse width according to the output. For example, with PWMs at 10 V and a duty ratio of 50%, the apparent drive voltage is 5 V, which means that there is no theoretical loss and the actual efficiency is very high.
In PWM control, the term duty ratio is often used. In a PWM waveform with a duty ratio of 50%, the H and L pulses are the same width.
Changing the duty ratio changes the apparent voltage. For example, when the duty ratio is changed from 0% to 25% to 50% to 75% to 100% with 10V PWMs, the apparent voltage to the load changes from 0V to 2.5V to 5V to 7.5V to 10V.
Although a microcontroller requires a D/A converter to output an analog signal, it is possible to create a pseudo-analog signal by using PWMs, which have a moderate switching frequency and a programmable duty ratio. In this case, it is possible to generate an appropriate analog signal up to the digital signal level at the I/O pins.
In this case, an appropriate LPF must be inserted in the I/O pin to remove the PWM switching frequency component and its harmonic components.
As mentioned above, PWM control is often used to control motor operation and to increase the efficiency of inverters. This generates noise at various switching frequencies, which range from 30 to 40 Hz.
This frequency is approximately 30 to 40 MHz, which not only causes noise problems for the surrounding people and environment but also affects AM radios and sensors that use low-frequency bands. Therefore, some sort of noise countermeasure is often required. Specific measures include, in the case of inverter equipment, covering the equipment with a housing, shortening the power cable, and inserting noise filters such as ferrites or LC chokes.
In some cases, PWM control allows the user to change this switching frequency, so it is another option to try. Lowering the switching carrier frequency reduces the overall switching noise itself, but generally increases the noise of the motor.
There are examples of products that reduce motor-specific generated noise by employing a modulation method that actively distributes the switching carrier frequency from low to high frequencies.
*Including some distributors, etc.
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Apex Microtechnology is based in Tucson, Arizona, USA, and is a manufacturer of hybrid, power analog monolithic, and open frame components originally founded in 1980 before being acquired by Heico Corporation in 2018. The company offers power operational amplifiers (op-amps) for amplifying weak input signals, and pulse width modulation (PWM) amplifiers for linearly increasing the strength of signals. It also offers voltage references for maintaining stability in electronic circuits by providing a fixed direct current. The company’s products are used by clients in the military, aerospace, and information technology sectors.
Intel Corporation, an American company founded in 1968 and headquartered in Santa Clara, California, is a manufacturer and supplier specializing in the design and production of semiconductor microprocessors. The company's product portfolio includes processors, graphics processing units, software, wireless products, and various other items. These products find applications in education, transportation, financial services, retail, and government. The company offers customer services including technical support, software development, cloud services, security services, and research and development collaboration. The company has manufacturing facilities, research and development centers, sales offices, and partnerships with businesses and organizations across various continents.
Vishay Intertechnology, Inc. (Vishay) was incorporated in 1962 and is headquartered in Malvern, Pennsylvania. The company serves the industrial, automotive, telecommunications, consumer products, and medical end markets and sells its products under numerous brand names inlcuding Siliconix, Draloric, Beyschlag, UltraSource, and Applied Thin-Film Products. The company manufactures and sells discrete semiconductors and passive electronic components in globally while operating in six market segments: MOSFETs, diodes, optoelectronic components, resistors, inductors, and capacitors.
MathWorks, Inc., founded in 1984, is an American manufacturer headquartered in Natick, Massachusetts, specializing in mathematical computing software for engineers and scientists. The company offers MATLAB, a programming and numeric computing platform, employed for data analysis, algorithm creation, and model development. MATLAB finds applications in various domains, including control systems, signal processing, deep and machine learning, predictive maintenance, and robotics. Simulink is another software developed by the company, encompassing a block diagram environment for model-based design and system engineering, simulation, and agile software development. This software is adopted in artificial intelligence (AI), autonomous systems, advanced driver assistance systems, digital twins, and electrification.
Gartner, Inc., was founded in 1979 in Stamford, Connecticut, USA, as a provider of information technology research, business insights, and tools. The company offers various insights encompassing strategic planning, guides, and generative AI resources, covering various functions including audit and risk, cybersecurity, and communications. It also provides tools including BuySmart, Critical Capabilities, Digital IQ, Hype Cycle, and the Magic Quadrant. The tools and insights offer in-depth analysis of providers' offerings, aiding in informed technology decisions, facilitating benchmarking against competitors, and covering various key functions. The company caters to various industries, including education, utilities, healthcare, high tech, and telecom.
Delta Electronics Americas Ltd., founded in 1971 and based in Taipei, Taiwan, is the largest supplier of switching power supplies and brushless fans. The company also provides components, industrial automation, visual displays, networking technologies, and renewable energy solutions. The company offers some of the finest energy-efficient power products available on the market, such as telecom power with an efficiency of up to 98%, switching power supplies with an efficiency of over 90%, and PV inverters with an efficiency of up to 99.2%. Since 2011, Delta has been included on the DJSI World Index of the Dow Jones Sustainability Indices.
Silan Microelectronics Co., Ltd., founded in 1997 in China, is a manufacturer of semiconductor microelectronics-related products for commercial, industrial, and military clients. The company's products include ICs, power modules, discrete devices, MCU/IC power semiconductor solutions, MEMS sensors, and optoelectronic products. Silan Microelectronics Co., Ltd. also specializes in LED chip manufacturing and packaging for indoor and outdoor LED display panels as well as LED illumination applications. The company was listed on the Shanghai Stock Exchange in 2003.
AiT Semiconductor, established in 1996 at Taiwan, is a manufacturer of semiconductors, specializing in the design and production of analog and mixed-signal ICs. The company offers a comprehensive portfolio of IC solutions for various applications, including power management, LED lighting, audio, and wireless network/communication. They manufacture power switches, inductors, regulator LDO, EEPROM memory and resonators along with other electrical solutions. These power components are used in multiple industries such as consumer, medical, industrial, communication and IoT sectors. Their products are equipped with improved performance, low power consumption, and robust sustainability.
Renesas Electronics Corporation was established in 2002 and is headquartered in Tokyo, Japan. Renesas is a global research, design, and manufacturer of semiconductors used in industries spanning automotive, consumer electronics, the internet of things, power & energy, and industrial sectors. Renesas manufactures both analog and digital products. Analog products include amplifiers, audio & video devices, data converters, PLC, and switches & multiplexers. Digital products include microcontrollers, memory components, sensors, wireless connectivity products, and others. Renesas also offers design resources such as kits, development tools, partner programs, and design tools.
ST Micro Electronics is a global semiconductor company serving customers with innovations to have a positive impact on people's lives. Their product line is micro electronic systems, such as switches, controllers, sensors and drivers. The main selling point of ST Micro Electronics is its provision of sustainable products, and introducing their electronics to create a more sustainable world. The company, as well as providing the electronic devices, also provides software and support, ensuring that all fields are covered to provide a fully provide a supported and strong relationship with their customer base. ST Micro Electronics believe that technology plays a key role in helping to solve environmental and social challenges, which is why their semiconductor technologies start with their employees, their customers and partners.
Byju's (stylised as BYJU'S), founded in 2011 and a subsidiary of Think and Learn Pvt. Ltd., is an Indian educational technology company headquartered in Bangalore, Karnataka, specializing in educational websites and applications. The company has developed BYJU'S - The Learning App, BYJU'S Disney Early Learn App, and BYJU'S Parent Connect App, offering self-paced learning through digital animation videos and related learning materials. Notably, the company launched BYJU’S WIZ, a suite of artificial intelligence (AI) models for hyper-personalized learning. Byju's has expanded its reach through acquisitions of educational companies like Great Learning Pvt. Ltd., Epic! Creations, Inc., TutorVista, and Edurite from Pearson PLC.
Cadence Design Systems, Inc. is an American computational software developer and supplier that was established in San Jose, California in 1988 following the merger of SDA Systems and ECAD, Inc. The company offers emulators and hardware platforms for the design and verification of electronic systems, as well as various software tools for electronic design with schematic capture, simulation, synthesis, and optimization capabilities. Some of the company’s notable clients include the NVIDIA Corporation, Ericsson AB, and NXP Semiconductors N.V.
Ranking as of January 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | MathWorks |
21.4%
|
| 2 | Gartner, Inc. |
15.7%
|
| 3 | Delta Electronics Americas Ltd. |
12.9%
|
| 4 | BYJU'S |
11.4%
|
| 5 | Cadence Design Systems, Inc. |
7.1%
|
| 6 | Intel Corporation |
7.1%
|
| 7 | Renesas Electronics Corporation. |
5.7%
|
| 8 | STMicroelectronics |
5.7%
|
| 9 | Apex Microtechnology |
4.3%
|
| 10 | Pur3 Ltd |
2.9%
|
Derivation Method
The ranking is calculated based on the click share within the pwm page as of January 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
6 | 54.5% |
|
Japan
|
2 | 18.2% |
|
China
|
1 | 9.1% |
|
Taiwan
|
1 | 9.1% |
|
India
|
1 | 9.1% |
39 products found
39 products
Sanshin Electric Co., Ltd.
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■ Features ・ HYPER super -high -speed PWM fan maximum speed 5,000rpm ・ Because there is a lot of air volume, it is a fan for equipment that requi...
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■Features This is a device that externally controls the rotation speed of a fan with PWM control function. A fan with PWM control function can be u...
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MIKI PULLEY CO., LTD.
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This is a power supply device that brings out the full performance of Miki Pulley's electromagnetic clutch and electromagnetic brake product group....
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Isahaya Electronics Co., Ltd.
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5.0 Company Review
This product is a PWM generation circuit suitable for driving LEDs, and the output DUTY ratio can be adjusted by changing the voltage value of the ...
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■Features ・Current can be adjusted individually with jumpers ・Dynamic adjustment of current by external microcontroller (using PWM) ・Voltage lim...
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