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PWM Controller

Pulse-width modulation (PWM), or pulse-duration modulation (PDM), is a technique used to encode a message into a pulsing signal. It is a type of modulation. Although this modulation technique can be used to encode information for transmission, its main use is to allow the control of the power supplied to electrical devices, especially to inertial loads such as motors. In addition, PWM is one of the two principal algorithms used in photovoltaic solar battery chargers,[1] the other being MPPT. The average value of voltage (and current) fed to the load is controlled by turning the switch between supply and load on and off at a fast rate. The longer the switch is on compared to the off periods, the higher the total power supplied to 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. The main advantage of PWM is that power loss in the switching devices is very low. When a switch is off there is practically no current, and when it is on and power is being transferred to the load, there is almost no voltage drop across the switch. Power loss, being the product of voltage and current, is thus in both cases close to zero. PWM also works well with digital controls, which, because of their on/off nature, can easily set the needed duty cycle. PWM has also been used in certain communication systems where its duty cycle has been used to convey information over a communications channel.

Power Management > PWM Controller

Part No.	DS	Manufacturer	D/C	Qty	Region	Action
M51995AFP		Renesas	201341+	5905	China	Request A Quote
M51995AFP		Renesas	2009+	1693	China	Request A Quote
M51995AFP		Renesas	-	4080	China	Request A Quote
M51995AFP		Renesas	2009+	7239	Hong Kong	Request A Quote
M51995AFP		Renesas	201341+	6333	Singapore	Request A Quote
M51995AFP		Renesas	-	14791	China	Request A Quote
M51995AFP		Renesas	-	205	China	Request A Quote
M51995AFP		Renesas	2010+	489	Japan	Request A Quote
M51995AFP		Renesas	201341+	5694	China	Request A Quote
M51995AFP		Renesas	201428+	120	China	Request A Quote
M51995AFP		Renesas	2013+	22000	Hong Kong	Request A Quote
M51995AFP		Renesas	2009+	7239	China	Request A Quote
M51995AFP		Renesas	201421+	16	Hong Kong	Request A Quote
M51995AFP		Renesas	2009+	2622	Hong Kong	Request A Quote
M51995AFP		Renesas	2009+	1703	Poland	Request A Quote

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