Laurence Marchini, Editor, writes:
We see from your search that you're looking for information on the term "PWM operation", and we have a large number of manufacturers' news releases and technical articles here on Electronicstalk which will be of interest. Let me be your guide.
Start with the news release Tiny step-down convertor saves power and space from Micrel, which we summarised at the time by saying "Proprietary switching method called Hyper Light Load achieves high efficiency, very low output ripple and fast transient response while using very small output capacitors". Several months prior to that, we featured the news release Single chip drives three-phase brushless DC motors from Toshiba Electronics Europe: "Driver IC brings together PWM sensorless motor control, protection functionality, an output power stage and an operational amplifier in a single 36-pin HSOP package".
In February 2007, we covered the news from First Components concerning its Edison Opto EPLW-2E00 and Macroblock MBI1801Driver - take a look at LEDs for mission-critical lighting applications which says: "Edison Opto's 15W High Power LED and Macroblock's MBI1801 LED Driver work well together in traffic applications".
Take a look also at the news release from Allegro MicroSystems Europe, Motor driver shrinks without thermal compromise, as well as Boost convertors start from a low 0.85V from Vishay Siliconix, and Regulator gets the jitters to cut EMI from Allegro MicroSystems Europe.
See also:
Microstepping driver IC has built-in translator (October 2005)
The new A3979 is a complete microstepping motor driver IC with built-in translator circuitry
Stepper driver ICs are easy to interface (August 2005)
Two new DMOS microstepping motor driver integrated circuits come with built-in translator circuitry and output ratings of 35V and 1.5 A (2A peak)
PSU controller combines two PWMs with dual LDOs (July 2005)
A high-efficiency quad-output system power supply controller is optimised for converting battery, wall adapter or network DC input voltages into system supply voltages required by notebook computers
Stepper-motor driver has easy MPU interface (June 2005)
A new bipolar stepper-motor driver has built-in translator circuitry that makes it very easy to interface to microprocessor-based control systems in office automation and industrial applications
Drivers produce more light from fewer LEDs (September 2004)
The MAX8595 and MAX8596 are 36V step-up DC/DC convertors that power up to eight LEDs in a series at 25mA
No diode required for integrated display supplies (September 2004)
The MAX1578 and MAX1579 are the first complete LCD bias and white-LED power supplies with only one inductor and no charge-pump diode
Controller solves biased load problems (May 2004)
The Endura ISL6522B single-phase dual-mode synchronous-buck PWM controller/driver IC is designed to provide exceptional soft-start to power sensitive circuits and gracefully handle prebiased loads
Controller handles prebiased loads 'gracefully' (April 2004)
The new Endura ISL6522B single-phase dual-mode synchronous-buck PWM controller/driver IC designed to provide exceptional soft-start to power sensitive circuits and gracefully handle prebiased loads
Microcontroller made for motor control (March 2004)
A new version of NEC's successful V850 32bit RISC MCU is optimised for motor control applications, with extensive onboard peripherals as well as in circuit programmability via onboard Flash memory
PWM controller provides flexible motion (March 2004)
The A3949 is a DMOS full-bridge motor driver integrated circuit designed for the PWM (pulsewidth-modulated) control of DC motors
Complete control and drive for two-phase steppers (January 2004)
Two new families of translator/driver integrated circuits provide the complete control and drive functions for two-phase unipolar stepper motors
Battery-friendly LED driver saves space as well (October 2003)
Otimised for constant current control, the MIC2287 is a boost-switching regulator with a feedback voltage of only 95mV which allows minimal output voltage in constant-current control applications
PWM driver for efficient electromechanical control (October 2003)
A novel high-side DMOS PWM driver is optimised for controlling electromechanical and thermal devices such as valves, solenoids, relays, actuators, heaters, coolers and lamps
Convertor chips boost battery life (June 2003)
Designers of portable high-performance applications with low-power requirements can increase system run-times and save board space using new 1.2A synchronous step-down DC/DC convertors
Low noise and small size for step-down regulators (September 2002)
The MAX1973 and MAX1974 are reckoned to be the smallest 1A step-down regulators for network, telecomms, cellular basestation, fibre modules, wireless modems and xDSL equipment
PWM chip provides flexible DC motor control (June 2002)
Designed for pulsewidth modulated current control of DC motors, the A3948 from Allegro MicroSystems can deliver a continuous output current up to +/-1.5 A and an operating voltage up to 50V
PWM motor drivers provide up to 3A (October 2001)
Allegro MicroSystems has introduced a new range of DMOS full-bridge pulsewidth modulated (PWM) motor driver integrated circuits