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pulse-width modulation What is pulse width modulation (PWM)? Search results

What is pulse width modulation (PWM)?
Pulse Width Modulation (PWM) is a way of digitally encoding analogue signal levels. Through the use of high-resolution counters, the duty cycle of a square wave is modulated to encode a specific analogue signal level. In more general terms, a switch is op
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2001-04-19 Three and four phase brushless dc motor controllers using pulse-width modulation
This application note describes LSI Computer Systems' five motor circuits (LS7260, LS7261, LS7262, LS7263 and LS7264) that drive brushless DC motor controllers.
2000-06-26 Pulse-width modulation in Xilinx programmable logic
This application note demonstrates how to build a variable PWM waveform using a counter and a storage register.
2001-10-10 M16C/62: Pulse width modulation
This application note describes the operations of PWM for the M16C/62 microcontroller. A sample assembly program is presented to demonstrate the basic functions of PWM.
2004-12-15 Spectrum analyzer spans time, frequency, modulation domains simultaneously
Tektronix's new RSA3408A spectrum analyzer debuts at a time when RF systems are racing up the curve in complexity and scope.
2002-01-25 LeCroy power tester performs modulation and line power analysis
Aside from performing standard power measurements, the PS354 also tests harmonic distortion against standardized templates for class A to D equipment.
2015-11-25 Tracking down ECU disturbances from EMI
In this article, we examine how to use oscilloscopes to detect ECU disturbances from electromagnetic interference.
2007-10-31 Tiny PWM controllers fit motherboard, POL apps
STMicroelectronics has extended its portfolio of power management devices with a new family of flexible and high-performance PWM controllers intended for motherboard and POL markets.
2008-04-28 Three-channel step-down DC/DC converter touts LDO controller
A triple channel, current mode, pulse-width modulation step-down DC/DC converter with three internal 36V power switches and an LDO controller has been announced by Linear Technology Corp.
2011-01-19 Temp sensor IC enables efficient LED lighting
Seiko Instruments Inc. (SII) launches the S-5855A Series of pulse width modulation (PWM) output temperature sensor IC for LED lighting designs.
2002-06-20 Stability and biasing for PWM amplifiers
This application note describes the stability and biasing of PWM amplifiers.
2004-11-10 Siliconix announces replacements for UCC380x, UCC280x controllers
A new family of low-power current-mode controllers that provide increased efficiency and flexibility in cost-sensitive power-supply designs was announced by Siliconix.
2002-08-21 Samsung Electro to use Fairchild controller IC for PDP, PC apps
Samsung Electro Mechanics has selected Fairchild Semiconductor's ML4824 PFC/PWM controller combo IC for its latest SMPS designs targeted for PDP and PC applications.
2006-04-25 PWM fan speed controller IC with wide input voltage range
Supertex's new PWM fan speed controller has a wide input voltage range of 16V to 90V, making its suitable for use in 24V and 48V systems.
2002-07-01 PWM easing digital control of analog circuits
By controlling analog circuits digitally, system costs and power consumption can be drastically reduced.
2006-02-03 PWM controllers with 0.5% system accuracy
Intersil has introduced a new family of VR11 pulse width modulation controllers with the industry's highest accuracy.
2005-03-11 PWM controllers provide flexibility
National rolled out what it bills as the industry's first 100V dual interleaved pulse-width modulation controllers for conventional single-ended and active-clamp reset topologies.
2006-03-21 PWM controller IC reduces solution footprint by 45%
International Rectifier introduced the IR3624, a 600kHz single-phase synchronous buck PWM controller IC designed for high density, 10A non-isolated POL regulators.
2009-11-30 PWM controller boasts power, space savings
Texas Instruments Inc. is offering an off-line green mode pulse-width modulation (PWM) controller that minimizes space and system cost while providing high efficiency in power supply applications.
2005-10-18 PWM advances active-clamp converter designs
National Semiconductor says its LM5026 pulse-width-modulation controller is the industry's most advanced type for forward converter toplogies using an active-clamp/reset design.
2006-03-22 PoE controller integrates power interface port
National Semiconductor introduced its single-chip power-over-Ethernet controller for higher-power PoE applications.
1999-12-01 PMW low pass filtering
Pulse width modulation (PWM) amplifiers often require low-pass filtering of the output to demodulate the PWM carrier. These filters can be as simple as a single inductor to multiple LC nodes depending on the application. In some motor and solenoid applications, the load can act as its own filter. Deciding on the type and size of a filter can be time consuming since the calculations can be tedious and often give component values that are not easily obtainable. This application note is an effort to reduce filter calculation time.
2013-12-02 Phase voltage reconstruction based on Qorivva MCUs
Know the Freescale Qorivva family features/approaches that can be used for motor control algorithms.
2005-06-08 PFC, PWM controller provides standby power consumption
ON Semi's NCP1603 device is a PFC and PWM combo controller that offers extremely low no-load standby power consumption because of its skipping cycle operation and PFC-stage shutdown while in standby mode
2007-11-01 Perform power factor correction efficiently
Take a peek at the inner workings of a board that can perform continuous conduction mode power factor correction efficiently and with a minimum number of peripheral components.
2007-02-05 Output of three-phase PWM signals and the corresponding inverse signals
This article describes how high-level width of pulses is controlled to manipulate the duty cycles of pulse-waveform signals, a technique to produce three-phase pulse-width modulation signals and the corresponding inverse signals.
2005-07-11 O2Micro receives U.S. patent for inverter circuits
O2Micro Int. Ltd was granted 4 claims under U.S. patent number 6,897,698 for its phase shifting and pulse width modulation (PWM) driving circuits and methods
2007-02-26 O2Micro gets patent for inverter driving solution
Power management supplier O2Micro International Ltd received three claims under the U.S. patent number 7,151,394 for its phase shifting and PWM driving circuits and methods.
2010-09-16 New product line for next-gen computing unveiled
ON Semiconductors' platform solutions for 2nd-gen Intel Core processors includes advanced controller ICs for CPU voltage regulation, switches for high-bandwidth communications
2014-02-21 Multirate techniques for digital power conversion
Discover how multi-rate techniques can support advances in digital power conversion.
2003-12-16 MCUs with PPG can function as PWM and DAC
MCUs that include built-in 16bit PPG timers can be configured in PWM mode to generate waveforms with varied pulse width at a constant period, in synchronization with a dedicated external or software trigger
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