Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Advanced Search > PWM

PWM 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 opened and closed in timed pulses, where the time the switch is closed is determines the power output.
Basically, a PWM variable-power scheme switches the power quickly between fully ON and fully OFF tens or hundreds of kHz in the case of a computer power supply (which has a regulated output). The switching rate is much faster than what would affect the load. The term duty cycle describes the proportion of ON time to the regular interval or period of time. A low duty cycle corresponds to low power because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully ON.
total search1500 articles
2007-04-24 32bit MCU suits motor-control home appliances
FMA has introduced the newest addition to its MB91480 series of 32bit MCUs for high-performance control of home appliances like refrigerators, washers and dryers.
2010-04-30 32bit MCU packs zero-wait state flash, SRAM
Toshiba America Electronic Components has developed the 32bit TMPM380 microcontroller for the digital control of high-current circuits commonly found in industrial or appliance applications.
2010-06-17 32bit MCU packs touch controller peripherals
Atmel Corp. has released the 32bit AVR UC3L microcontroller with picoPower technology and embedded capacitive touch controller peripherals.
2009-06-25 32bit MCU has built-in capacitive touch peripheral
Atmel Corp. has released a 32bit microcontroller with a power consumption of only 0.48mW/MHz in active mode.
2007-04-27 32bit MCU enables 3-phase motor control in one chip
Fujitsu Microelectronics Europe introduced MB91F487, the first member of a new series within its MB91480 32bit FR MCU family, optimized for 3-phase motor control in industrial and home appliances.
2011-07-01 32bit digital signal controllers tout energy efficiency
Freescale' new family of digital signal controllers offer high-speed analog functionality and energy savings.
2007-12-04 300V IGBTs can replace power MOSFETs
A family of 300V insulated IGBTs that can replace power MOSFETs have been introduced by IXYS Corp.
2007-06-14 2W LED driver delivers high voltage, switch current
Catalyst Semiconductor Inc. launched a 2W LED driver to address high-power backlighting applications.
2006-08-16 2MHz DC/DC converter runs as a quad LED driver
Linear Technology has announced the LT3476, a 2MHz DC/DC converter designed to operate as a four-channel constant current LED driver.
2010-03-25 2A DC/DC converters save space in portable apps
Texas Instruments Inc. has released the TPS62065 and TPS62067, highly-efficient, 2A step-down DC/DC converters that reduce board space and help extend battery life.
2006-03-16 28V boost converter powers 12 LED backlights, flash
Semtech's high-efficiency DC/DC boost converter drives up to 12 LEDs for both backlighting the LCDs in cellphones and PDAs as well as providing the power for camera flash.
2012-08-06 20w LED driver amplifies energy from low power sources
RECOM Electronic's LED driver provides high power from low voltage storage items such as batteries and solar panels
2015-10-16 200mA boost converter supports 2.7V to 5V output
The AS1383 from Ams is powered by a single-cell lithium-ion battery and can be used in consumer products such as wristbands, media players, digital cameras and mobile phones.
2010-05-04 2.2MHz PMIC equipped for automotive apps
Maxim Integrated Products has released a 2.2MHz, high-voltage, four-channel PMIC optimized for automotive applications that require up to four power rails at medium power levels.
2007-06-21 1MHz converter suits DSPs with 3.3V I/O rail
Linear Technology announces the LTC3522, a dual channel, 1MHz synchronous converter suited for DSPs and MCUs that require both a 3.3V I/O rail and a 0.6V to 1.8V rail for the core voltage.
2007-11-09 16bit RISC controller targets large-screen LCDs
Seiko Epson Corp. has unveiled the S1C17801, a 16bit RISC controller designed for applications that require analog input, large-screen full-graphic LCDs and various types of interfaces.
2013-04-04 16bit PIC MCU tweaked for cost-sensitive apps
The low cost PIC24F "KM" family of microcontrollers offer up to 16KB Flash, 2KB RAM and 512B EEPROM, along with advanced analogue integration, in low pin-count options.
2008-07-24 16bit MCUs drive automotive, chassis control apps
Renesas Technology Corp. announced 14 new products in the M16C/5L and M16C/56 Groups, in the M16C/Tiny Series of 16bit MCUs, which belongs to the M16C Family, for automotive body and chassis control applications.
2012-03-05 16bit MCUs boast low pin count, power use
The PIC24F 'KL' MCU family from Microchip Technology flaunts a low cost solution to consumer, medical and safety/security applications.
2008-09-01 16bit MCU: ready for 32bit action
The C166 architecture has earned itself a reputation as one of the most successful 16bit MCU families in a wide variety of industrial and automotive applications. From the start, the C166 architecture was designed for high real-time performance, with fast execution of instructions, rapid response times, and intelligent peripheral functionality.
2008-04-21 16bit LED driver improves full-color image quality
TI has released a 16-channel LED driver that improves image quality and reduces flicker noise in monochrome, multicolor and full-color LED displays, as well as LED signboards and display backlighting.
2008-01-16 16-channel LED driver caters to full-color apps
austriamicrosystems has beefed up its LED driver portfolio with the release of the AS1112 16-channel LED driver aimed at full-color applications such as LED video displays, LCD TV backlighting, indoor/outdoor LED displays and large-size stadium displays.
2005-05-04 16-bit digital signal controller targets cost-sensitive apps
Freescale says the price/performance and peripheral capability of its new 56F8000 series of digital signal controllers (DSC) address motor control for appliances, as well as digital power conversion.
2010-08-06 10ch 120 WLED driver IC highlights efficiency
The SC442 is a 10ch, high-efficiency integrated step-up (boost) driver IC capable of powering up to 120 WLEDs. The device accepts a wide input voltage of 4.5V to 21V with no internal regulator or bypass capacitor required.
2002-10-15 10/100Base-T core module accelerates embedded development
Rabbit Semiconductor's RCM3200 microprocessor core module enables designers to rapidly develop and implement embedded systems with Ethernet connectivity.
2006-12-04 'Smallest' LDO drives LED lighting in portables
Texas Instruments Inc. has introduced a two-bank LDO, touted to be the smallest of its kind, for supporting LED lighting in portable applications such as mobile phones, navigation systems, and MP3 and media players.
2008-06-12 'Smallest' DC/DC converter remits high performance
National Semiconductor Corp. recently launched what it claims as the smallest step-down DC/DC converter that is optimized for powering high-performance processors from a single Li-ion cell battery in mobile phones, personal media players and other mobile devices.
2008-04-17 'Smallest' 1.6MHz buck regulator promises 95% efficiency
Intersil Corp. has unveiled the ISL8009A, an ultra-small, high-efficiency synchronous buck regulator that saves space and offers improved efficiency for a broad range of applications.
2008-10-27 'Green Fan' carries thermal speed control
For design engineers seeking a way to reduce energy consumption in industrial enclosures and electronic equipment cabinets, Orion Fans has developed a thermal speed control option for several of its DC fan models.
2005-03-09 ?PFC device cuts board space in half
The IR1150 family of?PFC for ac-dc PFC circuits from International Rectifier promises to cut PFC control board space in half.
Bloggers Say

Bloggers Say

See what engineers like you are posting on our pages.

?
?
Back to Top