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

...
Lees meer Lees minder

Filters

1 - 20 van 78 producten worden weergegeven
Resultaten per pagina
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. 919-6478
FabrikantnummerUC3842BN
0,625 €
Each (In a Tube of 50)
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 686-5033
FabrikantnummerUC3842BN
0,625 €
Each (In a Pack of 10)
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 880-5364
FabrikantnummerSG3525AN
1,265 €
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. 168-8921
FabrikantnummerSG3525AN
1,266 €
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. 168-6816
FabrikantnummerSG3525AP
1,393 €
Each (In a Tube of 50)
Aantal stuks
- - - - - - 500 mA - Voltage 2 50ns Surface Mount SOIC 100ns
RS-stocknr. 920-8878
FabrikantnummerVIPER22AS-E
0,721 €
Each (In a Tube of 100)
Aantal stuks
60 kHz - - - - 730 V - - Current - 100ns Surface Mount SOIC 50ns
RS-stocknr. 145-8579
FabrikantnummerSG3524N
1,354 €
Each (In a Tube of 25)
Aantal stuks
300 kHz - - - - 18 V 100 mA - Voltage 2 100ns Through Hole PDIP 200ns
RS-stocknr. 920-8874
FabrikantnummerVIPER22ADIP-E
0,831 €
Each (In a Tube of 50)
Aantal stuks
60 kHz - - - - 730 V - - Current - 100ns Through Hole PDIP 50ns
RS-stocknr. 426-253
FabrikantnummerVIPER22AS-E
1,24 €
Each (In a Pack of 5)
Aantal stuks
60 kHz - - - - 730 V - - Current - 100ns Surface Mount SOIC 50ns
RS-stocknr. 168-6083
FabrikantnummerL6598D
1,926 €
Each (In a Tube of 50)
Aantal stuks
400 kHz 0.25mA 250mA 450mA 25 mA - - - - - - Surface Mount SOIC -
RS-stocknr. 633-789
FabrikantnummerSG3524N
1,58 €
Each
Aantal stuks
300 kHz - - - - 18 V 100 mA - Voltage 2 100ns Through Hole PDIP 200ns
RS-stocknr. 714-1004
FabrikantnummerSG3525AP
1,64 €
Each (In a Pack of 2)
Aantal stuks
- - - - - - 500 mA - Voltage 2 50ns Surface Mount SOIC 100ns
RS-stocknr. 426-263
FabrikantnummerVIPER22ADIP-E
0,982 €
Each (In a Pack of 5)
Aantal stuks
60 kHz - - - - 730 V - - Current - 100ns Through Hole PDIP 50ns
RS-stocknr. 415-1045
FabrikantnummerL6598D
2,27 €
Each
Aantal stuks
400 kHz 0.25mA 250mA 450mA 25 mA - - - - - - Surface Mount SOIC -
RS-stocknr. 445-573
FabrikantnummerL6566B
1,588 €
Each (In a Pack of 5)
Aantal stuks
107 kHz - - - - - 800 mA - - 1 - Surface Mount SOIC -
RS-stocknr. 168-8876
FabrikantnummerSG2525AN
1,195 €
Each (In a Tube of 25)
Aantal stuks
400 kHz 80µA 400mA 400mA 20 mA 5.05 to 5.15 V 500 mA - - 2 - Through Hole PDIP -
RS-stocknr. 168-6471
FabrikantnummerL6598
1,979 €
Each (In a Tube of 25)
Aantal stuks
400 kHz 0.25mA 250mA 450mA 25 mA - - - - - - Through Hole PDIP -
RS-stocknr. 714-7847
FabrikantnummerUC3844BN
0,71 €
Each (In a Pack of 10)
Aantal stuks
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-stocknr. 166-0930
FabrikantnummerL6566B
1,341 €
Each (In a Tube of 30)
Aantal stuks
107 kHz - - - - - 800 mA - - 1 - Surface Mount SOIC -
RS-stocknr. 686-8433
FabrikantnummerL6598
2,34 €
Each (In a Pack of 2)
Aantal stuks
400 kHz 0.25mA 250mA 450mA 25 mA - - - - - - Through Hole PDIP -