Power Factor & PWM Controllers

PWM stands for Pulse Width Modulation. Electronic circuits can contain both analogue and digital components. PWM allows you to control analogue devices using a digital signal. Many electrical designs use PWM for regulation.

Analogue signals can be on or off, but they can also be half-way on etc. Whereas a digital signal has just on or off positions. Both signals appear in electronic circuits and are required to work together. Inputs can be converted using a DAC or ADC. PWM is available to control the output of a device. For example, a PWM can convert the digital output of a microcontroller (MCU) into an analogue signal, to drive the next analogue component.

Types of PWM device:

  • 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 duty cycle?

PWM signals feature two main things, frequency and a duty cycle. Duty cycle is given as a % 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 is PWM 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 Zero Power Detection Number of Outputs Mounting Type Package Type Pin Count Dimensions Length Width Height
RS-stocknr. 163-2223
FabrikantnummerNCP1937B1DR2G
FabrikantON Semiconductor
0,515 €
Each (On a Reel of 2500)
Aantal stuks
30.5 kHz 20mA 290µA 48µA 5.2 mA - 1 Surface Mount SOIC 20 9.9 x 3.9 x 1.5mm 9.9mm 3.9mm 1.5mm
RS-stocknr. 796-1224
FabrikantnummerNCP1937B1DR2G
FabrikantON Semiconductor
0,528 €
Each (In a Pack of 5)
Aantal stuks
30.5 kHz 20mA 290µA 48µA 5.2 mA - 1 Surface Mount SOIC 20 9.9 x 3.9 x 1.5mm 9.9mm 3.9mm 1.5mm
RS-stocknr. 145-4401
FabrikantnummerFAN4801SNY
FabrikantON Semiconductor
1,121 €
Each (In a Tube of 25)
Aantal stuks
67 kHz 80µA 50µA -40µA 1 mA - - Through Hole PDIP 16 19.69 x 7.11 x 4.95mm 19.69mm 7.11mm 4.95mm
RS-stocknr. 180-8396
FabrikantnummerISL81401FRZ-T7A
5,96 €
Each
Aantal stuks
650 kHz 2 (Soft)µA 1mA 1mA 6 mA - 1 Surface Mount QFN 32 5 x 5 x 0.9mm 5mm 5mm 0.9mm
RS-stocknr. 162-6074
FabrikantnummerUCC28513DW
3,554 €
Each (In a Tube of 25)
Aantal stuks
230 kHz 0.1mA - - - - - Surface Mount SOIC 20 12.8 x 7.52 x 2.35mm 12.8mm 7.52mm 2.35mm
RS-stocknr. 190-6679
FabrikantnummerMAX8521ETP+T
FabrikantMaxim Integrated
9,57 €
Each
Aantal stuks
1 MHz - - - 21 mA - - Surface Mount TQFN 20 5 x 5 x 0.75mm 5mm 5mm 0.75mm
RS-stocknr. 169-5594
FabrikantnummerUCC28051D
0,252 €
Each (In a Tube of 75)
Aantal stuks
200 kHz 0.075mA - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm
RS-stocknr. 180-8398
FabrikantnummerISL81601FRZ-T7A
7,73 €
Each
Aantal stuks
650 kHz 2 (Soft)µA 1mA 1mA 6 mA - 1 Surface Mount QFN 32 5 x 5 x 0.9mm 5mm 5mm 0.9mm
RS-stocknr. 865-0880
FabrikantnummerFAN4800ASNY
FabrikantON Semiconductor
1,036 €
Each (In a Pack of 5)
Aantal stuks
- 80µA 50µA -35 (Current) μA, -40 (Voltage) μA 5 mA - 2 Through Hole PDIP 16 19.69 x 7.11 x 4.95mm 19.69mm 7.11mm 4.95mm
RS-stocknr. 865-0909
FabrikantnummerFAN4802SNY
FabrikantON Semiconductor
0,496 €
Each (In a Pack of 5)
Aantal stuks
- 80µA 50µA -35 (Current) μA, -40 (Voltage) μA 5 mA - 2 Through Hole PDIP 16 19.69 x 7.11 x 4.95mm 19.69mm 7.11mm 4.95mm
RS-stocknr. 175-7403
FabrikantnummerUCC28056DBVT
0,332 €
Each (On a Reel of 250)
Aantal stuks
100 kHz <46µA -120µA 120µA 2.2 mA Yes 1 Surface Mount SOT-23 6 3.05 x 1.75 x 1.3mm 3.05mm 1.75mm 1.3mm
RS-stocknr. 180-8391
FabrikantnummerISL81401FRZ-T7A
3,872 €
Each (On a Reel of 250)
Aantal stuks
650 kHz 2 (Soft)µA 1mA 1mA 6 mA - 1 Surface Mount QFN 32 5 x 5 x 0.9mm 5mm 5mm 0.9mm
RS-stocknr. 166-2436
FabrikantnummerFAN7621SSJX
FabrikantON Semiconductor
0,508 €
Each (On a Reel of 2000)
Aantal stuks
300 kHz - 360mA 0.6A 9 mA - - Surface Mount SOP 16 10.2 x 5.3 x 1.8mm 10.2mm 5.3mm 1.8mm
RS-stocknr. 175-1753
FabrikantnummerSTCMB1
1,355 €
Each (In a Pack of 2)
Aantal stuks
75 kHz 100µA 5mA 100mA 6 mA - 1 Surface Mount SO 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm
RS-stocknr. 791-9153
FabrikantnummerL6566BH
1,12 €
Each (In a Pack of 10)
Aantal stuks
300 kHz 250µA 480µA 3mA 4.6 mA Yes 1 Surface Mount SOIC 16 10 x 4 x 1.25mm 10mm 4mm 1.25mm
RS-stocknr. 175-1735
FabrikantnummerSTCMB1
1,322 €
Each (In a Tube of 40)
Aantal stuks
75 kHz 100µA 5mA 100mA 6 mA - 1 Surface Mount SO 20 13 x 7.6 x 2.35mm 13mm 7.6mm 2.35mm
RS-stocknr. 661-6036
FabrikantnummerUCC38501DW
5,46 €
Each
Aantal stuks
115 kHz 0.15mA - - - - - Surface Mount SOIC 20 12.8 x 7.52 x 2.35mm 12.8mm 7.52mm 2.35mm
RS-stocknr. 739-6112
FabrikantnummerFAN7621SSJX
FabrikantON Semiconductor
1,294 €
Each (In a Pack of 5)
Aantal stuks
300 kHz - 360mA 0.6A 9 mA - - Surface Mount SOP 16 10.2 x 5.3 x 1.8mm 10.2mm 5.3mm 1.8mm
RS-stocknr. 190-4416
FabrikantnummerMAX8521ETP+T
FabrikantMaxim Integrated
7,408 €
Each (On a Reel of 2500)
Aantal stuks
1 MHz - - - 21 mA - 1 Surface Mount TQFN 20 5 x 5 x 0.75mm 5mm 5mm 0.75mm
RS-stocknr. 180-8390
FabrikantnummerISL81401AFRZ-T7A
2,41 €
Each (On a Reel of 250)
Aantal stuks
650 kHz 2 (Soft)µA 1mA 1mA 6 mA - 1 Surface Mount QFN 32 5 x 5 x 0.9mm 5mm 5mm 0.9mm
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