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

...
Read more Read less

Filter

Visar 1 - 20 av 728 produkter
Resultat per sida
Beskrivning Pris 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-artikelnummer 620-0492
Tillv. art.nrUC3524AN
VarumärkeTexas Instruments
22,202 kr
Each (In a Pack of 5)
Enheter
500 kHz - - - - 60 V 200 mA - Voltage 2 - Through Hole PDIP -
RS-artikelnummer 121-8951
Tillv. art.nrUC3524AN
VarumärkeTexas Instruments
18,956 kr
Each (In a Tube of 25)
Enheter
500 kHz - - - - 60 V 200 mA - Voltage 2 - Through Hole PDIP -
RS-artikelnummer 823-0016
Tillv. art.nrLTC3723EGN-1#PBF
VarumärkeAnalog Devices
95,76 kr
Each
Enheter
1 MHz 230µA 700µA 5mA 8 mA - - - - - - Surface Mount SSOP -
RS-artikelnummer 121-9153
Tillv. art.nrUC2879N
VarumärkeTexas Instruments
95,502 kr
Each (In a Tube of 20)
Enheter
300 kHz - - - - - 100 mA - - 4 - Through Hole PDIP -
RS-artikelnummer 661-5201
Tillv. art.nrUC2879N
VarumärkeTexas Instruments
72,41 kr
Each
Enheter
300 kHz - - - - - 100 mA - - 4 - Through Hole PDIP -
RS-artikelnummer 145-4322
Tillv. art.nrKA3525A
VarumärkeON Semiconductor
6,432 kr
Each (In a Tube of 25)
Enheter
430 kHz - - - - 2 V 500 mA - - 2 - Through Hole PDIP -
RS-artikelnummer 168-5810
Tillv. art.nrVIPER12AS-E
VarumärkeSTMicroelectronics
3,852 kr
Each (In a Tube of 100)
Enheter
- - - - - - - - - - - Surface Mount SOIC -
RS-artikelnummer 426-247
Tillv. art.nrVIPER12AS-E
VarumärkeSTMicroelectronics
6,868 kr
Each (In a Pack of 5)
Enheter
- - - - - - - - - - - Surface Mount SOIC -
RS-artikelnummer 168-8921
Tillv. art.nrSG3525AN
VarumärkeSTMicroelectronics
12,06 kr
Each (In a Tube of 25)
Enheter
400 kHz - - - - 5 to 5.2 V 50 mA, 500 mA - - 2 - Through Hole PDIP -
RS-artikelnummer 753-2964
Tillv. art.nrICE3BR0665JXKLA1
VarumärkeInfineon
21,70 kr
Each (In a Pack of 2)
Enheter
65 kHz - - - - 650 V 9.95 A - Current 1 30ns Through Hole DIP 30ns
RS-artikelnummer 739-0284
Tillv. art.nrKA3525A
VarumärkeON Semiconductor
7,764 kr
Each (In a Pack of 5)
Enheter
430 kHz - - - - 2 V 500 mA - - 2 - Through Hole PDIP -
RS-artikelnummer 471-427
Tillv. art.nrLT1611CS5#TRMPBF
VarumärkeAnalog Devices
44,90 kr
Each
Enheter
1800 kHz - - - - -5 V - - - - - Surface Mount TSOT-23 -
RS-artikelnummer 145-0807
Tillv. art.nrUC2842AN
VarumärkeTexas Instruments
11,318 kr
Each (In a Tube of 50)
Enheter
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
RS-artikelnummer 661-4942
Tillv. art.nrTL3843P
VarumärkeTexas Instruments
3,432 kr
Each (In a Pack of 5)
Enheter
500 kHz - - - - 30 V 200 mA - Current 1 50ns Through Hole PDIP 50ns
RS-artikelnummer 761-8342
Tillv. art.nrLT1619ES8#PBF
VarumärkeAnalog Devices
41,91 kr
Each
Enheter
360 kHz - - - - - 1.5 A - Current 1 35ns Surface Mount SOIC 30ns
RS-artikelnummer 917-3491
Tillv. art.nrLT1611CS5#TRMPBF
VarumärkeAnalog Devices
28,094 kr
Each (On a Reel of 500)
Enheter
1800 kHz - - - - -5 V - - - - - Surface Mount TSOT-23 -
RS-artikelnummer 919-8812
Tillv. art.nrICE3BR0665JXKLA1
VarumärkeInfineon
16,928 kr
Each (In a Tube of 50)
Enheter
65 kHz - - - - 650 V 9.95 A - Current 1 30ns Through Hole DIP 30ns
RS-artikelnummer 880-5364
Tillv. art.nrSG3525AN
VarumärkeSTMicroelectronics
12,445 kr
Each (In a Pack of 10)
Enheter
400 kHz - - - - 5 to 5.2 V 50 mA, 500 mA - - 2 - Through Hole PDIP -
RS-artikelnummer 145-1163
Tillv. art.nrUCC28600D
VarumärkeTexas Instruments
9,384 kr
Each (In a Tube of 75)
Enheter
130 kHz - - - - - 0 mA - - - - Surface Mount SOIC -
RS-artikelnummer 714-1149
Tillv. art.nrUC2845BN
VarumärkeSTMicroelectronics
6,974 kr
Each (In a Pack of 10)
Enheter
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns