PWM Controller | PWM Boost & Buck Controller | RS
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    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 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

    555 Products showing for PWM

    onsemi
    -
    500 kHz
    -
    -
    -
    -
    -
    1 A
    Current
    1
    50ns
    Through Hole
    PDIP
    50ns
    8
    Boost, Flyback, Forward
    10.16 x 6.6 x 3.44mm
    96%
    10.16mm
    Current Mode
    6.6mm
    3.44mm
    Texas Instruments
    -
    300 kHz
    -
    -
    -
    -
    40 V
    200 mA
    Voltage
    2
    40ns
    Surface Mount
    SOIC
    100ns
    16
    Boost, Buck, Flyback, Forward, Full Bridge, Half Bridge, Push-Pull
    9.9 x 3.91 x 1.58mm
    45%
    9.9mm
    Voltage Mode
    3.91mm
    1.58mm
    onsemi
    -
    600 kHz
    15mA
    -5µA
    65µA
    1.8 mA
    -
    -
    -
    -
    -
    Through Hole
    PDIP
    -
    8
    -
    9.6 x 6.4 x 3.4mm
    -
    9.6mm
    SMPS
    6.4mm
    3.4mm
    Infineon
    Zero Power Detection
    65 kHz
    550µA
    -
    -
    2.3 mA
    -
    -
    -
    1
    -
    Surface Mount
    DSO
    -
    8
    -
    5 x 4 x 1.65mm
    -
    5mm
    -
    4mm
    1.65mm
    Texas Instruments
    -
    600 kHz
    -
    -
    -
    -
    -
    1.5 A
    Current
    2
    16ns
    Surface Mount
    MSOP
    16ns
    10
    Full Bridge, Half Bridge, Push-Pull
    3 x 3 x 0.86mm
    49%
    3mm
    Current Mode
    3mm
    0.86mm
    Texas Instruments
    -
    600 kHz
    -
    -
    -
    -
    -
    1.5 A
    -
    -
    -
    Surface Mount
    MSOP
    -
    10
    -
    3 x 3 x 0.86mm
    -
    3mm
    Current Mode
    3mm
    0.86mm
    onsemi
    -
    600 kHz
    15mA
    -5µA
    65µA
    1.8 mA
    -
    -
    -
    -
    -
    Through Hole
    PDIP
    -
    8
    -
    9.6 x 6.4 x 3.4mm
    -
    9.6mm
    SMPS
    6.4mm
    3.4mm
    Texas Instruments
    -
    1000 kHz
    -
    -
    -
    -
    -
    1 A
    Current
    2
    25ns
    Surface Mount
    SOIC
    25ns
    8
    Half Bridge, Push-Pull
    4.9 x 3.91 x 1.58mm
    50%
    4.9mm
    Current Mode
    3.91mm
    1.58mm
    STMicroelectronics
    -
    500 kHz
    -
    -
    -
    -
    5.05 V
    ±1 A
    Current
    1
    150ns
    Surface Mount
    SOIC
    150ns
    8
    Boost, Flyback
    5 x 4 x 1.65mm
    100%
    5mm
    Current Mode
    4mm
    1.65mm
    Texas Instruments
    -
    1000 kHz
    -
    -
    -
    -
    -
    1 A
    Current
    2
    25ns
    Surface Mount
    SOIC
    25ns
    8
    Full Bridge, Half Bridge, Push-Pull
    4.9 x 3.91 x 1.58mm
    50%
    4.9mm
    Current Mode
    3.91mm
    1.58mm
    STMicroelectronics
    -
    500 kHz
    -
    -
    -
    -
    5.05 V
    1 A
    Current
    1
    150ns
    Surface Mount
    SOIC
    150ns
    8
    Boost, Flyback
    5 x 4 x 1.65mm
    100%
    5mm
    Current Mode
    4mm
    1.65mm
    STMicroelectronics
    -
    75 kHz
    100µA
    5mA
    100mA
    6 mA
    -
    -
    -
    1
    -
    Surface Mount
    SO
    -
    20
    -
    13 x 7.6 x 2.35mm
    -
    -
    -
    -
    -
    Texas Instruments
    -
    300 kHz
    -
    -
    -
    -
    40 V
    200 mA
    Voltage
    2
    40ns
    Surface Mount
    SOIC
    100ns
    16
    Boost, Buck, Flyback, Forward, Full Bridge, Half Bridge, Push-Pull
    9.9 x 3.91 x 1.58mm
    45%
    9.9mm
    Voltage Mode
    3.91mm
    1.58mm
    onsemi
    -
    500 kHz
    -
    -
    -
    -
    5.05 V
    1 A
    Current
    1
    150ns
    Through Hole
    PDIP
    150ns
    8
    Boost, Flyback
    10.16 x 7.11 x 4.95mm
    50%
    10.16mm
    Current Mode
    7.11mm
    4.95mm
    Infineon
    Zero Power Detection
    65 kHz
    550µA
    -
    -
    2.3 mA
    -
    -
    -
    1
    -
    Surface Mount
    DSO
    -
    8
    -
    5 x 4 x 1.65mm
    -
    5mm
    -
    4mm
    1.65mm
    onsemi
    -
    500 kHz
    -
    -
    -
    -
    5.05 V
    1 A
    Current
    1
    150ns
    Through Hole
    PDIP
    150ns
    8
    Boost, Flyback
    10.16 x 7.11 x 4.95mm
    96%
    10.16mm
    Current Mode
    7.11mm
    4.95mm
    Texas Instruments
    -
    300 kHz
    -
    -
    -
    -
    40 V
    200 mA
    Voltage
    2
    40ns
    Surface Mount
    SOIC
    100ns
    16
    Boost, Buck, Flyback, Forward, Full Bridge, Half Bridge, Push-Pull
    9.9 x 3.91 x 1.58mm
    45%
    9.9mm
    Voltage Mode
    3.91mm
    1.58mm
    onsemi
    -
    500 kHz
    -
    -
    -
    -
    5.05 V
    1 A
    Current
    1
    150ns
    Through Hole
    PDIP
    150ns
    8
    Boost, Flyback
    10.16 x 7.11 x 4.95mm
    96%
    10.16mm
    Current Mode
    7.11mm
    4.95mm
    STMicroelectronics
    -
    500 kHz
    -
    -
    -
    -
    5.05 V
    1 A
    Current
    1
    150ns
    Surface Mount
    SOIC
    150ns
    8
    Boost, Flyback
    5 x 4 x 1.65mm
    100%
    5mm
    Current Mode
    4mm
    1.65mm
    onsemi
    -
    60 kHz
    -
    -
    -
    -
    10 V
    500 mA
    Current
    1
    20ns
    Through Hole
    PDIP
    40ns
    7
    Flyback
    10.16 x 6.6 x 3.44mm
    -
    10.16mm
    Current Mode
    6.6mm
    3.44mm
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