What is pulse width modulation (PWM)?
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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. |
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| 2011-09-26 | How to migrate MC56F8013 PWM to MC568247 PWM How to migrate MC56F8013 PWM to MC568247 PWM |
| 2011-09-15 | How to set reset-synchronized PWM mode in MCU How to set reset-synchronized PWM mode in MCU |
| 2011-09-02 | GPIO/keypad controllers save battery life Analog Devices' ADP5585 and ADP5589 GPIO/keypad controllers featuring low active current drain and integrated programmable logic/PWM offer battery savings in portable devices. |
| 2011-09-09 | How to migrate PWM from MC56F8013 to MC568247 How to migrate PWM from MC56F8013 to MC568247 |
| 2011-09-06 | Using S12GN32 MCU for light control, protection Understand the control and protection capabilities S12GN32. |
| 2011-08-31 | Utilise eTPU2, eQADC for PWM control on MCU Utilise eTPU2, eQADC for PWM control on MCU |
| 2011-08-22 | PWM controllers ease power supply design PWM controllers ease power supply design |
| 2011-08-18 | Employ MCU for sinusoidal PWM motor control Employ MCU for sinusoidal PWM motor control |
| 2011-08-11 | PWM generator targets industrial, robotic apps PWM generator targets industrial, robotic apps |
| 2011-07-20 | PWM DAC using MSP430 timer PWM DAC using MSP430 timer |
| 2011-07-08 | MTU2 asymmetric complementary PWM output MTU2 asymmetric complementary PWM output |
| 2011-07-05 | MTU3 complementary PWM mode MTU3 complementary PWM mode |
| 2011-07-05 | MTU3 reset-synchronised PWM mode MTU3 reset-synchronised PWM mode |
| 2011-06-28 | PWM controller achieves <100mW at no-load conditions PWM controller achieves <100mW at no-load conditions |
| 2011-05-23 | Addressing challenges in PWM generator validation Addressing challenges in PWM generator validation |
| 2011-05-03 | Digital PWM controller eliminates no-load power waste Digital PWM controller eliminates no-load power waste |
| 2011-05-02 | 80mm2 buck regulator targets portable power mgmt Semtech reveals the SC197, a 500mA, dual-output, point-of-load (POL) regulator, combining two PWM DC/DC regulators with an overall design solution footprint of 80mm2. |
| 2011-04-01 | LM5045 evaluation board The LM5045 evaluation board is designed to provide the design engineer with a fully functional power converter based on the full-bridge topology to evaluate the LM5045 PWM controller. |
| 2011-03-28 | Multi-channel PWM output using DMA transfer Multi-channel PWM output using DMA transfer |
| 2011-03-14 | Full-bridge PWM controllers pack MOSFET gate drivers Full-bridge PWM controllers pack MOSFET gate drivers |
| 2011-02-14 | PFC LED driver IC designed for space-constrained apps iWatt debuts its first power-factor-corrected (PFC) LED driver IC with primary-side-regulated, leading- and trailing-edge-dimmable, AC/DC Digital PWM Controller. |
| 2011-01-21 | Temp sensor IC optimised for LED efficiency Seiko Instruments reveals the S-5855A series PWM output temperature sensor IC designed for LED lighting systems in PC laptops, tablets or other devices requiring temperature control. |
| 2011-01-21 | DC voltage controls PWM dimming of HB LEDs DC voltage controls PWM dimming of HB LEDs |
| 2010-12-30 | Evaluation board for LM3410X LED driver This evaluation board features the PWM capability of the LM3410 by enabling the user to apply a periodic pulse signal to the DIM terminal of varying duty cycle. |
| 2010-12-15 | MIPI M-Phy core designed for 40nm process Cosmic Circuits releases its MIPI M-Phy core designed to integrate capability for the G1 and G2 high-speed modes and to support the SYS and PWM low-speed modes for 40nm process technology. |
| 2010-12-15 | LED driver IC allows high PWM dimming ratios LED driver IC allows high PWM dimming ratios |
| 2010-12-16 | Evaluation board for LM5035C controller Read about the LM5035C evaluation board designed to provide the design engineer with a fully functional power converter based on the half bridge topology to evaluate the LM5035C controller. |
| 2010-11-30 | LED controller improves efficiency with PF correction TI rolls out the TPS92210, a single-stage, TRIAC-dimmable LED lighting pulse width modulation (PWM) controller solution that offers single-stage power factor correction for improved efficiency. |
| 2010-11-29 | Class-D audio driver packs floating PWM input Class-D audio driver packs floating PWM input |
| 2010-11-16 | Automotive LED driver IC packs core functionality NXP delivers LED driver IC solutions which incorporate critical functionality such as direct LED temperature feedback, LED fault detection, internal PWM control for dimming and short circuit protection. |
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