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
    -
    -
    -
    -
    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
    Texas Instruments
    Zero Power Detection
    100 kHz
    <46µA
    -120µA
    120µA
    2.2 mA
    -
    -
    -
    1
    -
    Surface Mount
    SOT-23
    -
    6
    -
    3.05 x 1.75 x 1.3mm
    -
    -
    -
    -
    -
    Infineon
    -
    -
    30µA
    -
    -
    2 mA
    26 V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Texas Instruments
    -
    -
    -
    -
    -
    -
    -
    3 (Max) A
    -
    -
    -
    Surface Mount
    SOIC
    -
    8
    -
    4.9 x 3.91 x 1.58mm
    -
    4.9mm
    SMPS
    3.91mm
    1.58mm
    Infineon
    -
    -
    30µA
    -
    -
    2 mA
    26 V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Texas Instruments
    -
    1000 kHz
    -
    -
    -
    -
    -
    1.5 A
    Current, Voltage
    2
    30ns
    Surface Mount
    SOIC
    30ns
    16
    Boost, Buck, Flyback, Forward, Full Bridge, Half Bridge, Push-Pull
    10.28 x 7.52 x 2.35mm
    85%
    10.28mm
    Current Mode
    7.52mm
    2.35mm
    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
    -
    400 kHz
    0.25mA
    250mA
    450mA
    25 mA
    -
    -
    -
    -
    -
    Surface Mount
    SOIC
    -
    16
    -
    10 x 4 x 1.64mm
    -
    10mm
    Resonant
    4mm
    1.64mm
    Microchip
    -
    112 kHz
    -
    -
    -
    -
    65 V
    1.25 A
    Current
    1
    -
    Surface Mount
    SOIC
    -
    8
    Boost, Buck, Flyback, Forward
    4.93 x 3.94 x 1.48mm
    89%
    4.93mm
    Current Mode
    3.94mm
    1.48mm
    Texas Instruments
    -
    500 kHz
    -
    -
    -
    -
    -
    1 A
    Current
    1
    50ns
    Surface Mount
    SOIC
    50ns
    14
    Boost, Flyback, Forward
    8.65 x 3.91 x 1.58mm
    100%
    8.65mm
    Current Mode
    3.91mm
    1.58mm
    onsemi
    -
    1 MHz
    -
    -
    -
    -
    5.25 V
    6 A
    Voltage
    1
    200ns
    Surface Mount
    PQFN
    200ns
    35
    Buck
    6 x 6 x 0.75mm
    50%
    6mm
    Current Mode
    6mm
    0.75mm
    Texas Instruments
    -
    1000 kHz
    -
    -
    -
    -
    -
    2 A
    Current
    1
    14ns
    Surface Mount
    SOIC
    19ns
    16
    Flyback, Forward
    9.9 x 3.91 x 1.58mm
    73%
    9.9mm
    Current Mode
    3.91mm
    1.58mm
    Infineon
    -
    -
    300µA
    -
    -
    1.5 mA
    10 V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    STMicroelectronics
    -
    75 kHz
    100µA
    5mA
    100mA
    6 mA
    -
    -
    -
    1
    -
    Surface Mount
    SO
    -
    20
    -
    13 x 7.6 x 2.35mm
    -
    -
    -
    -
    -
    onsemi
    -
    500 kHz
    -
    -
    -
    -
    -
    1 A
    Current
    1
    50ns
    Through Hole
    PDIP
    50ns
    8
    Boost, Flyback
    10.16 x 6.6 x 3.44mm
    48%
    10.16mm
    Current Mode
    6.6mm
    3.44mm
    STMicroelectronics
    -
    300 kHz
    -
    -
    -
    -
    18 V
    100 mA
    Voltage
    2
    100ns
    Through Hole
    PDIP
    200ns
    16
    Push-Pull
    20 x 7.1 x 5.1mm
    45%
    20mm
    Voltage Mode
    7.1mm
    5.1mm
    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
    -
    500 kHz
    -
    -
    -
    -
    -
    1 A
    Current
    1
    50ns
    Through Hole
    PDIP
    50ns
    8
    Boost, Flyback
    10.16 x 6.6 x 3.44mm
    48%
    10.16mm
    Current Mode
    6.6mm
    3.44mm
    Texas Instruments
    -
    1000 kHz
    -
    -
    -
    -
    -
    2 A
    Current
    1
    14ns
    Surface Mount
    SOIC
    19ns
    16
    Flyback, Forward
    9.9 x 3.91 x 1.58mm
    73%
    9.9mm
    Current Mode
    3.91mm
    1.58mm
    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
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