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. 753-2964
FabrikantnummerICE3BR0665JXKLA1
FabrikantInfineon
€ 2,035
Each (In a Pack of 2)
Aantal stuks
65 kHz - - - - 650 V 9.95 A - Current 1 30ns Through Hole DIP 30ns
RS-stocknr. 919-8812
FabrikantnummerICE3BR0665JXKLA1
FabrikantInfineon
€ 1,587
Each (In a Tube of 50)
Aantal stuks
65 kHz - - - - 650 V 9.95 A - Current 1 30ns Through Hole DIP 30ns
RS-stocknr. 145-5980
FabrikantnummerTL494CDR
€ 0,105
Each (On a Reel of 2500)
Aantal stuks
300 kHz - - - - 40 V 200 mA - Voltage 2 40ns Surface Mount SOIC 100ns
RS-stocknr. 661-6866
FabrikantnummerTL494CDR
€ 0,40
Each (In a Pack of 10)
Aantal stuks
300 kHz - - - - 40 V 200 mA - Voltage 2 40ns Surface Mount SOIC 100ns
RS-stocknr. 660-8076
FabrikantnummerUC3842AN
€ 1,358
Each (In a Pack of 5)
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 162-9496
FabrikantnummerNCP1271D65R2G
FabrikantON Semiconductor
€ 0,281
Each (On a Reel of 2500)
Aantal stuks
69 kHz - - - - 20 V -800 mA, 500 mA - Current 1 20ns Surface Mount SOIC 30ns
RS-stocknr. 786-8890
FabrikantnummerNCP1271D65R2G
FabrikantON Semiconductor
€ 0,592
Each (In a Pack of 10)
Aantal stuks
69 kHz - - - - 20 V -800 mA, 500 mA - Current 1 20ns Surface Mount SOIC 30ns
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. 923-3830
FabrikantnummerUC3842AN
€ 1,155
Each (In a Tube of 50)
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 168-6083
FabrikantnummerL6598D
€ 1,675
Each (In a Tube of 50)
Aantal stuks
400 kHz 0.25mA 250mA 450mA 25 mA - - - - - - Surface Mount SOIC -
RS-stocknr. 169-5594
FabrikantnummerUCC28051D
€ 0,255
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Aantal stuks
200 kHz 0.075mA - - - - - - - - - Surface Mount SOIC -
RS-stocknr. 415-1045
FabrikantnummerL6598D
€ 1,98
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400 kHz 0.25mA 250mA 450mA 25 mA - - - - - - Surface Mount SOIC -
RS-stocknr. 620-0559
FabrikantnummerUC3825DW
€ 4,20
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Aantal stuks
1000 kHz - - - - - 1.5 A - Current, Voltage 2 30ns Surface Mount SOIC 30ns
RS-stocknr. 445-573
FabrikantnummerL6566B
€ 1,38
Each (In a Pack of 5)
Aantal stuks
107 kHz - - - - - 800 mA - - 1 - Surface Mount SOIC -
RS-stocknr. 686-8433
FabrikantnummerL6598
€ 2,035
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400 kHz 0.25mA 250mA 450mA 25 mA - - - - - - Through Hole PDIP -
RS-stocknr. 168-4860
FabrikantnummerUCC2808D-1
€ 1,916
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1 MHz - - - - - 1 A - - - - Surface Mount SOIC -
RS-stocknr. 121-8955
FabrikantnummerUC3825DW
€ 3,567
Each (In a Tube of 40)
Aantal stuks
1000 kHz - - - - - 1.5 A - Current, Voltage 2 30ns Surface Mount SOIC 30ns
RS-stocknr. 166-0930
FabrikantnummerL6566B
€ 1,166
Each (In a Tube of 30)
Aantal stuks
107 kHz - - - - - 800 mA - - 1 - Surface Mount SOIC -
RS-stocknr. 168-6471
FabrikantnummerL6598
€ 1,721
Each (In a Tube of 25)
Aantal stuks
400 kHz 0.25mA 250mA 450mA 25 mA - - - - - - Through Hole PDIP -
RS-stocknr. 661-5535
FabrikantnummerUCC28051D
€ 0,264
Each (In a Pack of 5)
Aantal stuks
200 kHz 0.075mA - - - - - - - - - Surface Mount SOIC -