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

...
อ่านเพิ่มเติม อ่านน้อยกว่า

คัดกรอง / Filters

กำลังดูสินค้า 1 - 16 รายการจาก 16 รายการ / Viewing 1 - 16 of 16 products
ผลการค้นหาต่อหน้า / Results Per Page
รายละเอียดสินค้า / Description ราคา / Price 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 Stock No. 911-2957
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MIC2171WU-TR
Brand :Microchip
THB123.875
Each: (In a Pack of 2)
Units
115 kHz - - - - 65 V 2.5 A - - 1 - Surface Mount TO-263 -
RS Stock No. 774-7422
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP1630V-E/MS
Brand :Microchip
THB39.464
Each (In a Bag of 5)
Units
1 MHz - -9mA 11mA 4.5 mA - - - - - - Surface Mount MSOP -
RS Stock No. 165-4035
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MIC2171WU-TR
Brand :Microchip
THB107.776
Each (On a Reel of 750)
Units
115 kHz - - - - 65 V 2.5 A - - 1 - Surface Mount TO-263 -
RS Stock No. 165-2137
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MCP1630V-E/MS
Brand :Microchip
THB36.55
Each (In a Tube of 100)
Units
1 MHz - -9mA 11mA 4.5 mA - - - - - - Surface Mount MSOP -
RS Stock No. 829-3373
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HV9120P-G
Brand :Microchip
THB82.226
Each: (In a Pack of 5)
Units
3 MHz - - - - 4.16 V 10 mA - Current, Voltage 1 75ns Through Hole PDIP 75ns
RS Stock No. 145-9136
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MIC3172YN
Brand :Microchip
THB93.849
Each (In a Tube of 50)
Units
112 kHz - - - - 65 V 1.25 A - Current 1 - Through Hole PDIP -
RS Stock No. 910-1562
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MIC3172YN
Brand :Microchip
THB85.18
Each: (In a Pack of 2)
Units
112 kHz - - - - 65 V 1.25 A - Current 1 - Through Hole PDIP -
RS Stock No. 178-4853
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HV9120P-G
Brand :Microchip
THB97.11
Each (In a Tube of 24)
Units
3 MHz - - - - 4.16 V 10 mA - Current, Voltage 1 75ns Through Hole PDIP 75ns
RS Stock No. 910-1553
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MIC3172YM
Brand :Microchip
THB70.934
Each: (In a Pack of 5)
Units
112 kHz - - - - 65 V 1.25 A - Current 1 - Surface Mount SOIC -
RS Stock No. 165-4050
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MIC2172YM-TR
Brand :Microchip
THB68.557
Each (On a Reel of 2500)
Units
115 kHz - - - - 65 V 1.25 A - Current 1 - Surface Mount SOIC -
RS Stock No. 829-3364
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HV9120NG-G
Brand :Microchip
THB97.538
Each: (In a Pack of 5)
Units
3 MHz - - - - 4.16 V 10 mA - Current, Voltage 1 75ns Surface Mount SOIC 75ns
RS Stock No. 911-2727
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MIC2172YM-TR
Brand :Microchip
THB78.46
Each: (In a Pack of 5)
Units
115 kHz - - - - 65 V 1.25 A - Current 1 - Surface Mount SOIC -
RS Stock No. 159-7545
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MIC3172YM
Brand :Microchip
THB72.471
Each (In a Tube of 95)
Units
112 kHz - - - - 65 V 1.25 A - Current 1 - Surface Mount SOIC -
RS Stock No. 829-3376
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HV9123NG-G
Brand :Microchip
THB117.136
Each: (In a Pack of 5)
Units
3 MHz - - - - 4.16 V 10 mA - Current, Voltage 1 75ns Surface Mount SOIC 75ns
RS Stock No. 178-4905
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HV9123NG-G
Brand :Microchip
THB108.864
Each (In a Tube of 45)
Units
3 MHz - - - - 4.16 V 10 mA - Current, Voltage 1 75ns Surface Mount SOIC 75ns
RS Stock No. 178-4904
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.HV9120NG-G
Brand :Microchip
THB99.456
Each (In a Tube of 45)
Units
3 MHz - - - - 4.16 V 10 mA - Current, Voltage 1 75ns Surface Mount SOIC 75ns