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

    553 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
    onsemi
    -
    200 kHz
    7mA
    -4mA
    0.7mA
    15 mA
    -
    -
    -
    -
    -
    Surface Mount
    SOIC
    -
    16
    -
    10 x 4 x 1.5mm
    -
    10mm
    -
    4mm
    1.5mm
    onsemi
    -
    430 kHz
    -
    -
    -
    -
    2 V
    500 mA
    -
    2
    -
    Through Hole
    PDIP
    -
    16
    -
    19.8 x 6.4 x 3.25mm
    -
    19.8mm
    Switching Regulator
    6.4mm
    3.25mm
    STMicroelectronics
    -
    75 kHz
    100µA
    5mA
    100mA
    6 mA
    -
    -
    -
    1
    -
    Surface Mount
    SO
    -
    20
    -
    13 x 7.6 x 2.35mm
    -
    -
    -
    -
    -
    onsemi
    -
    275 kHz
    -
    -
    -
    -
    5.1 V
    1 A
    Current
    1
    150ns
    Surface Mount
    SOIC
    150ns
    8
    Boost, Flyback, Forward
    5 x 4 x 1.5mm
    96%
    5mm
    Current Mode
    4mm
    1.5mm
    Analog Devices
    -
    1.4 MHz
    -
    -
    -
    -
    3.3 V
    6 A
    -
    1
    -
    Surface Mount
    TSSOP
    -
    16
    -
    5.1 x 4.5 x 0.95mm
    -
    5.1mm
    Step Down Switching Regulator
    4.5mm
    0.95mm
    onsemi
    -
    250 kHz
    -
    -
    -
    -
    5.05 V
    1 A
    Current
    1
    150ns
    Surface Mount
    SOIC
    150ns
    14
    Boost, Flyback
    8.75 x 4 x 1.5mm
    50%
    8.75mm
    Current Mode
    4mm
    1.5mm
    STMicroelectronics
    -
    75 kHz
    100µA
    5mA
    100mA
    6 mA
    -
    -
    -
    1
    -
    Surface Mount
    SO
    -
    20
    -
    13 x 7.6 x 2.35mm
    -
    -
    -
    -
    -
    onsemi
    -
    250 kHz
    -
    -
    -
    -
    5.1 V
    1 A
    Current
    1
    150ns
    Surface Mount
    SOIC
    150ns
    14
    Boost, Flyback
    8.75 x 4 x 1.5mm
    50%
    8.75mm
    Current Mode
    4mm
    1.5mm
    onsemi
    -
    275 kHz
    -
    -
    -
    -
    5.1 V
    1 A
    Current
    1
    150ns
    Surface Mount
    SOIC
    150ns
    8
    Boost, Flyback, Forward
    5 x 4 x 1.5mm
    96%
    5mm
    Current Mode
    4mm
    1.5mm
    onsemi
    -
    250 kHz
    -
    -
    -
    -
    5.1 V
    1 A
    Current
    1
    150ns
    Surface Mount
    SOIC
    150ns
    14
    Boost, Flyback
    8.75 x 4 x 1.5mm
    50%
    8.75mm
    Current Mode
    4mm
    1.5mm
    STMicroelectronics
    -
    400 kHz
    0.25mA
    250mA
    450mA
    25 mA
    -
    -
    -
    -
    -
    Surface Mount
    SOIC
    -
    16
    -
    10 x 4 x 1.64mm
    -
    10mm
    Resonant
    4mm
    1.64mm
    onsemi
    -
    190 kHz
    -
    -
    -
    -
    4.5 V
    150 mA
    Current
    1
    120ns
    Surface Mount
    SOP
    200ns
    8
    Flyback
    4.9 x 3.9 x 1.75mm
    -
    4.9mm
    Current Mode
    3.9mm
    1.75mm
    onsemi
    -
    250 kHz
    -
    -
    -
    -
    5.1 V
    1 A
    Current
    1
    150ns
    Surface Mount
    SOIC
    150ns
    8
    Boost, Flyback
    5 x 4 x 1.5mm
    50%
    5mm
    Current Mode
    4mm
    1.5mm
    STMicroelectronics
    Zero Power Detection
    300 kHz
    250µA
    480µA
    3mA
    4.6 mA
    -
    -
    -
    1
    -
    Surface Mount
    SOIC
    -
    16
    -
    10 x 4 x 1.25mm
    -
    -
    -
    -
    -
    STMicroelectronics
    -
    300 kHz
    -
    -
    -
    -
    18 V
    100 mA
    Voltage
    2
    100ns
    Surface Mount
    SOIC
    200ns
    16
    Push-Pull
    10 x 4 x 1.65mm
    45%
    10mm
    Voltage Mode
    4mm
    1.65mm
    onsemi
    -
    71 kHz
    -
    -
    -
    -
    -
    -
    Current
    1
    -
    Through Hole
    PDIP
    20ns
    7
    Flyback
    10.16 x 6.6 x 3.44mm
    72%
    10.16mm
    Current Mode
    6.6mm
    3.44mm
    onsemi
    -
    300 kHz
    8mA
    -4mA
    0.7mA
    18 mA
    -
    -
    -
    -
    -
    Surface Mount
    SOIC
    -
    16
    -
    10 x 4 x 1.5mm
    -
    10mm
    -
    4mm
    1.5mm
    STMicroelectronics
    -
    245 kHz
    -
    -
    -
    -
    -
    -
    -
    -
    30ns
    Surface Mount
    SOIC
    60ns
    16
    Half Bridge
    10 x 4 x 1.5mm
    -
    10mm
    Voltage Mode
    4mm
    1.5mm
    Analog Devices
    -
    700 kHz
    -
    -
    -
    -
    5 V
    3 A
    Current
    1
    280ns
    Surface Mount
    SOIC
    170ns
    8
    Buck
    5 x 4 x 1.75mm
    50%
    5mm
    Current Mode
    4mm
    1.75mm
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