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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Description Prix 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
N° de stock RS 426-263
Référence fabricantVIPER22ADIP-E
0,854 €
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60 kHz - - - - 730 V - - Current - 100ns Through Hole PDIP 50ns
N° de stock RS 179-2108
Référence fabricantUCC35701D
6,245 €
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700 kHz - - - - - 1 A - Voltage 1 20ns Surface Mount SOIC 20ns
N° de stock RS 922-3445
Référence fabricantUC3526ADW
2,297 €
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- - - - - - - - - - - - - -
N° de stock RS 166-2461
Référence fabricantFAN6300HMY
0,31 €
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190 kHz - - - - 7.5 V - - Current - 120ns Surface Mount SOP 200ns
N° de stock RS 661-4970
Référence fabricantTL598CD
1,554 €
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300 kHz - - - - - 200 mA - Voltage 2 35ns Surface Mount SOIC 60ns
N° de stock RS 753-2964
Référence fabricantICE3BR0665JXKLA1
MarqueInfineon
2,035 €
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65 kHz - - - - 650 V 9.95 A - Current 1 30ns Through Hole DIP 30ns
N° de stock RS 661-5232
Référence fabricantUC3526ADW
2,752 €
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650 kHz - - - - - 100 mA - Voltage 2 100ns Surface Mount SOIC 300ns
N° de stock RS 714-7847
Référence fabricantUC3844BN
0,617 €
Each (In a Pack of 10)
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500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
N° de stock RS 226-9829
Référence fabricantUCC3806N
9,81 €
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52 kHz - - - - - 500 mA - Current 2 35ns Through Hole PDIP 35ns
N° de stock RS 526-874
Référence fabricantUC2843AN
1,354 €
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500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns
N° de stock RS 170-4519
Référence fabricantXRP6124HVES0.5-F
MarqueMaxLinear
0,428 €
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1000 kHz - - - - 1.2 to 12 V 4 A - Voltage 1 35ns Surface Mount SOT-23 45ns
N° de stock RS 168-8876
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1,04 €
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400 kHz 80µA 400mA 400mA 20 mA 5.05 to 5.15 V 500 mA - - 2 - Through Hole PDIP -
N° de stock RS 533-3844
Référence fabricantLM2611AMF/NOPB
2,78 €
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1400 kHz - - - - -1.23 V - - - 1 - Surface Mount SOT-23 -
N° de stock RS 821-5225
Référence fabricantNCP1396ADR2G
1,059 €
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575 kHz - - - - - - - Voltage 1 20ns Surface Mount SOIC 40ns
N° de stock RS 166-1621
Référence fabricantFAN6300AMY
0,305 €
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190 kHz - - - - 4.5 V 150 mA - Current 1 120ns Surface Mount SOP 200ns
N° de stock RS 528-123
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0,355 €
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300 kHz - - - - 40 V 200 mA - - - - Through Hole PDIP -
N° de stock RS 103-5063
Référence fabricantNCP1014ST65T3G
0,365 €
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71 kHz - - - - - - - Current 1 - Surface Mount SOT-223 20ns
N° de stock RS 802-2134
Référence fabricantNCP1200P40G
0,799 €
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48 kHz - - - - - 250 mA - Current 1 28ns Through Hole PDIP 67ns
N° de stock RS 166-0930
Référence fabricantL6566B
1,166 €
Each (In a Tube of 30)
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107 kHz - - - - - 800 mA - - 1 - Surface Mount SOIC -
N° de stock RS 121-8412
Référence fabricantUC2843AN
1,154 €
Each (In a Tube of 50)
Unité
500 kHz - - - - - 1 A - Current 1 50ns Through Hole PDIP 50ns