Pulse width modulation (PWM) is a modulation technique that is used to encode a message into a pulsing signal. PWM controllers encode data onto the duty cycle (the ratio or percentage of one period in which a signal or system is active). The encoded data is commonly used in power electronic systems to regulate the amount of power applied to the load.
How do PWM controllers work?
A PMC will use voltage feedback to ensure that the voltage applied to a load is precisely controlled. The controller will supervise the switching operation to regulate the output voltage by comparing output voltage with the desired output to derive the correct voltage. They are popular because of their high efficiency over a wide voltage input range.
A PWM controller can also be integrated with a hot swap controller for enhanced power monitoring accuracy.
What are PWM controllers used for?
PWM controllers are common in many applications including variable speed fans, house dimmer switches and electric cookers.
Description:
The VIPerPlus series of high-voltage converters combine an
800V avalanche-rugged MOSFET, that allows ultra-wide range mains voltage input, with a leading-edge PWM controller. VIPerPlus fixed frequency off-line converters enable SMPS designs meeting the most demanding energy saving regulations with enhanced ...
Description:
HV9110 is a BiCMOS/DMOS single-output, pulse width modulator
IC intended for use in high-speed, high-efficiency switch mode power supplies. It provides all the functions necessary to implement a single-switch current mode PWM, in any topology, with a minimum of external ...
Description:
Pulse-width modulator (PWM) controllers can support isolated and
non-isolated AC-DC and DC-DC switch mode power supplies. They are based on the most popular topologies in both single-ended, such as fly-back, forward or quasi-resonant controllers, and double-ended configurations, such as asymmetrical ...
Description:
Pulse-width modulator (PWM) controllers can support isolated and
non-isolated AC-DC and DC-DC switch mode power supplies. They are based on the most popular topologies in both single-ended, such as fly-back, forward or quasi-resonant controllers, and double-ended configurations, such as asymmetrical ...
