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. 516-5146
FabrikantnummerUC3842BNG
FabrikantON Semiconductor
0,60 €
Each
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 102-3497
FabrikantnummerUC3842BNG
FabrikantON Semiconductor
0,502 €
Each (In a Tube of 50)
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 145-2968
FabrikantnummerMC34067PG
FabrikantON Semiconductor
2,298 €
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. 806-2107
FabrikantnummerMC34067PG
FabrikantON Semiconductor
2,706 €
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. 145-4653
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. 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. 739-0284
FabrikantnummerKA3525A
FabrikantON Semiconductor
0,838 €
Each (In a Pack of 5)
Aantal stuks
430 kHz - - - - 2 V 500 mA - - 2 - Through Hole PDIP -
RS-stocknr. 739-6074
FabrikantnummerFAN6300HMY
FabrikantON Semiconductor
0,894 €
Each (In a Pack of 5)
Aantal stuks
190 kHz - - - - 7.5 V - - Current - 120ns Surface Mount SOP 200ns
RS-stocknr. 166-2461
FabrikantnummerFAN6300HMY
FabrikantON Semiconductor
0,356 €
Each (On a Reel of 2500)
Aantal stuks
190 kHz - - - - 7.5 V - - Current - 120ns Surface Mount SOP 200ns
RS-stocknr. 145-4322
FabrikantnummerKA3525A
FabrikantON Semiconductor
0,694 €
Each (In a Tube of 25)
Aantal stuks
430 kHz - - - - 2 V 500 mA - - 2 - Through Hole PDIP -
RS-stocknr. 163-2463
FabrikantnummerMC33067PG
FabrikantON Semiconductor
2,183 €
Each (In a Tube of 25)
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 821-5225
FabrikantnummerNCP1396ADR2G
FabrikantON Semiconductor
1,218 €
Each (In a Pack of 10)
Aantal stuks
575 kHz - - - - - - - Voltage 1 20ns Surface Mount SOIC 40ns
RS-stocknr. 103-5063
FabrikantnummerNCP1014ST65T3G
FabrikantON Semiconductor
0,459 €
Each (On a Reel of 4000)
Aantal stuks
71 kHz - - - - - - - Current 1 - Surface Mount SOT-223 20ns
RS-stocknr. 145-4652
FabrikantnummerKA7552A
FabrikantON Semiconductor
0,729 €
Each (In a Tube of 50)
Aantal stuks
600 kHz 15mA -5µA 65µA 1.8 mA - - - - - - Through Hole PDIP -
RS-stocknr. 802-2134
FabrikantnummerNCP1200P40G
FabrikantON Semiconductor
0,919 €
Each (In a Pack of 10)
Aantal stuks
48 kHz - - - - - 250 mA - Current 1 28ns Through Hole PDIP 67ns
RS-stocknr. 800-7425
FabrikantnummerFAN6300AMY
FabrikantON Semiconductor
0,62 €
Each (In a Pack of 10)
Aantal stuks
190 kHz - - - - 4.5 V 150 mA - Current 1 120ns Surface Mount SOP 200ns
RS-stocknr. 163-0083
FabrikantnummerNCP1396ADR2G
FabrikantON Semiconductor
0,582 €
Each (On a Reel of 2500)
Aantal stuks
575 kHz - - - - - - - Voltage 1 20ns Surface Mount SOIC 40ns
RS-stocknr. 688-8831
FabrikantnummerNCP1014ST65T3G
FabrikantON Semiconductor
1,035 €
Each (In a Pack of 2)
Aantal stuks
71 kHz - - - - - - - Current 1 - Surface Mount SOT-223 20ns
RS-stocknr. 162-9492
FabrikantnummerNCP1251BSN65T1G
FabrikantON Semiconductor
0,127 €
Each (On a Reel of 3000)
Aantal stuks
71 kHz - - - - 28.3 V -500 mA, 300 mA - Current 1 30ns Surface Mount TSOP 40ns
RS-stocknr. 786-8872
FabrikantnummerNCP1251BSN65T1G
FabrikantON Semiconductor
0,121 €
Each (In a Pack of 10)
Aantal stuks
71 kHz - - - - 28.3 V -500 mA, 300 mA - Current 1 30ns Surface Mount TSOP 40ns