PWM

Electronic circuits can contain both analogue and digital components. PWM, which stands for Pulse Width Modulation, facilitates the control of analogue devices using a digital signal. Many electrical designs use PWM for regulation, with PWM used as a way to reduce the average power that is delivered by an electrical signal by chopping it up into smaller parts. RS Components offer a range of PWM Controllers from a multitude of trusted brands, including ON Semiconductor, STMicroelectronics, Texas Instruments, and more.

What do PWMs do?

Analogue signals can be on or off, or can even be put into a position half-way between the two, whereas a digital signal has just on or off positions. Both signals appear in electronic circuits and can often be required to work together. Inputs can be converted using a DAC (digital-to-analogue converter) or an ADC (analogue-to-digital converter). PWM is available to control the output of a device: for example, PWM can convert the digital output of a microcontroller (MCU) into an analogue signal to drive the next analogue component.

Types of PWM devices:

  • PWM Voltage Mode Controllers work by applying a control voltage (Vc) and a PWM ramp (Vramp) input.
  • PWM Current Mode Controllers add a second loop feeding back to the inductor current to create the PWM ramp.
  • PWM Switching Regulators feed the input voltage back through the PWM controller to keep the output voltage constant.

What is a duty cycle?

PWM signals feature two main things: frequency and a duty cycle. Duty cycle is given as a percentage (%) and refers to the amount of time the signal is on. For example, if the duty cycle is 50%, the signal is on for 50% and off for 50% of the time period. Pulse width modulation uses a rectangular pulse wave.

Where are PWM controllers used?

  • Motors
  • LED lighting
  • Lamps
  • Heaters/HVAC
  • Electric vehicles
  • Robotics
  • Communication systems

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Omschrijving Prijs Maximum Switching Frequency Start-up Supply Current Maximum Source Current Maximum Sink Current Maximum Supply Current Output Voltage Output Current Zero Power Detection Control Method Number of Outputs Fall Time Mounting Type Package Type Rise Time
RS-stocknr. 686-5033
FabrikantnummerUC3842BN
0,485 €
Each (In a Pack of 10)
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 919-6478
FabrikantnummerUC3842BN
0,485 €
Each (In a Tube of 50)
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 102-3497
FabrikantnummerUC3842BNG
FabrikantON Semiconductor
0,436 €
Each (In a Tube of 50)
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 857-8510
FabrikantnummerICE3B0365JFKLA1
FabrikantInfineon
0,834 €
Each (In a Tube of 2000)
Aantal stuks
76 kHz - - - - - - - Current 1 30ns Through Hole PDIP 30ns
RS-stocknr. 516-5146
FabrikantnummerUC3842BNG
FabrikantON Semiconductor
0,52 €
Each
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 145-6183
FabrikantnummerUC2524AN
1,706 €
Each (In a Tube of 25)
Aantal stuks
- - - - - 60 V 200 mA - Voltage 2 - Through Hole PDIP -
RS-stocknr. 806-2107
FabrikantnummerMC34067PG
FabrikantON Semiconductor
2,354 €
Each (In a Pack of 5)
Aantal stuks
2200 kHz - - - - 5.2 V 1.5 A - Voltage 2 50ns Through Hole PDIP 50ns
RS-stocknr. 145-2968
FabrikantnummerMC34067PG
FabrikantON Semiconductor
1,998 €
Each (In a Tube of 25)
Aantal stuks
2200 kHz - - - - 5.2 V 1.5 A - Voltage 2 50ns Through Hole PDIP 50ns
RS-stocknr. 168-8921
FabrikantnummerSG3525AN
1,166 €
Each (In a Tube of 25)
Aantal stuks
400 kHz - - - - 5 to 5.2 V 50 mA, 500 mA - - 2 - Through Hole PDIP -
RS-stocknr. 880-5364
FabrikantnummerSG3525AN
1,167 €
Each (In a Pack of 10)
Aantal stuks
400 kHz - - - - 5 to 5.2 V 50 mA, 500 mA - - 2 - Through Hole PDIP -
RS-stocknr. 862-9384
FabrikantnummerKA7553A
FabrikantON Semiconductor
0,275 €
Each (In a Pack of 10)
Aantal stuks
600 kHz 15mA -5µA 65µA 1.8 mA - - - - - - Through Hole PDIP -
RS-stocknr. 162-4341
FabrikantnummerTL5001CP
1,457 €
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Aantal stuks
500 kHz - - - 2.1 mA 1 to 50 V 3 A - - 1 - Through Hole PDIP -
RS-stocknr. 796-8473
FabrikantnummerUC1845AJ
16,46 €
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Aantal stuks
500 kHz - - - - 5.05 V 1 A - Current 1 150ns Through Hole CDIP 150ns
RS-stocknr. 145-4653
FabrikantnummerKA7553A
FabrikantON Semiconductor
0,27 €
Each (In a Tube of 50)
Aantal stuks
600 kHz 15mA -5µA 65µA 1.8 mA - - - - - - Through Hole PDIP -
RS-stocknr. 200-6779
FabrikantnummerTL5001CP
1,75 €
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500 kHz - - - 2.1 mA 1 to 50 V 3 A - - 1 - Through Hole PDIP -
RS-stocknr. 920-8874
FabrikantnummerVIPER22ADIP-E
0,722 €
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Aantal stuks
60 kHz - - - - 730 V - - Current - 100ns Through Hole PDIP 50ns
RS-stocknr. 920-3479
FabrikantnummerTL494IN
0,515 €
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Aantal stuks
300 kHz - - - - 40 V 200 mA - - - - Through Hole PDIP -
RS-stocknr. 426-253
FabrikantnummerVIPER22AS-E
1,078 €
Each (In a Pack of 5)
Aantal stuks
60 kHz - - - - 730 V - - Current - 100ns Surface Mount SOIC 50ns
RS-stocknr. 415-1045
FabrikantnummerL6598D
2,04 €
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Aantal stuks
400 kHz 0.25mA 250mA 450mA 25 mA - - - - - - Surface Mount SOIC -
RS-stocknr. 714-1004
FabrikantnummerSG3525AP
1,35 €
Each (In a Pack of 2)
Aantal stuks
- - - - - - 500 mA - Voltage 2 50ns Surface Mount SOIC 100ns