Pulse-width
modulation, also known as pulse-duration modulation, PWM or PDM is a modulation
technique that conforms the width (which is the duration) of the pulse based on
modulator signal information. This modulation technique can be used in order to
encode information for transmission and can also allow the control of the power
that is supplied to electrical devices. Pulse-width modulation is also often
used in photovoltaic solar battery chargers.
https://www.futureelectronics.com/p/analog--power-controllers--pwm-controllers/fan7631sjx-on-semiconductor-3028158
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