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

    605 Produkter som visas för PWM

    Texas Instruments
    -
    400 kHz
    -
    -
    -
    -
    -
    400 mA
    Voltage
    2
    50ns
    Through Hole
    PDIP
    100ns
    16
    Boost, Buck, Flyback, Forward, Full Bridge, Half Bridge, Push-Pull
    19.3 x 6.35 x 4.57mm
    49%
    19.3mm
    Voltage Mode
    6.35mm
    4.57mm
    Texas Instruments
    -
    1000 kHz
    -
    -
    -
    -
    -
    1.5 A
    Current, Voltage
    2
    30ns
    Through Hole
    PDIP
    30ns
    16
    Boost, Buck, Flyback, Forward, Full Bridge, Half Bridge, Push-Pull
    19.3 x 6.35 x 4.57mm
    85%
    19.3mm
    Current Mode
    6.35mm
    4.57mm
    Maxim Integrated
    -
    500 kHz
    -
    -
    -
    -
    -200 V
    5 A
    Current
    1
    200ns
    Surface Mount
    QSOP
    200ns
    16
    Flyback
    4.98 x 3.99 x 1.651mm
    97%
    4.98mm
    Current Mode
    3.99mm
    1.651mm
    STMicroelectronics
    -
    -
    -
    -
    -
    -
    -
    -
    Current
    -
    -
    Surface Mount
    SO
    -
    8
    -
    5 x 4 x 1.5mm
    -
    5mm
    Current Mode
    4mm
    1.5mm
    STMicroelectronics
    -
    500 kHz
    -
    -
    -
    -
    -
    1 A
    Current
    1
    50ns
    Surface Mount
    SOIC
    50ns
    8
    Boost, Flyback
    5 x 4 x 1.25mm
    50%
    5mm
    Current Mode
    4mm
    1.25mm
    Texas Instruments
    -
    1 MHz
    150µA
    -
    -
    -
    -
    100 mA
    -
    4
    -
    Surface Mount
    SOIC
    -
    20
    -
    12.8 x 7.52 x 2.35mm
    -
    12.8mm
    -
    7.52mm
    2.35mm
    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
    -
    245 kHz
    -
    -
    -
    -
    -
    -
    -
    -
    30ns
    Surface Mount
    SOIC
    60ns
    16
    Half Bridge
    10 x 4 x 1.5mm
    -
    10mm
    Voltage Mode
    4mm
    1.5mm
    MaxLinear
    -
    1000 kHz
    -
    -
    -
    -
    1.2 to 12 V
    4 A
    Voltage
    1
    35ns
    Surface Mount
    SOT-23
    45ns
    5
    Buck
    2.9 x 1.6 x 1.3mm
    -
    2.9mm
    Voltage Mode
    1.6mm
    1.3mm
    Renesas Electronics
    -
    2 MHz, 500 kHz
    -
    -
    -
    -
    -
    1.2 A
    -
    2
    -
    Surface Mount
    DFN
    -
    12
    -
    4 x 3 x 0.95mm
    -
    4mm
    Switching Regulator
    3mm
    0.95mm
    Intersil
    Zero Power Detection
    1.5 MHz
    -
    -
    -
    -
    5.5 V
    >40 A
    -
    1
    -
    Surface Mount
    QFN
    -
    24
    -
    4 x 4 x 0.85mm
    -
    4mm
    -
    4mm
    0.85mm
    onsemi
    -
    65 kHz
    -
    -
    -
    -
    670 V
    300 mA
    -
    -
    10ns
    Surface Mount
    SOIC
    20ns
    10
    -
    5 x 4 x 1.75mm
    72%
    5mm
    Current Mode
    4mm
    1.75mm
    Microchip
    -
    1 MHz
    0.0017mA
    0.1A
    0.1A
    8 mA
    28 V
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    MaxLinear
    -
    1000 kHz
    -
    -
    -
    -
    1.2 to 12 V
    4 A
    Voltage
    1
    35ns
    Surface Mount
    SOT-23
    45ns
    5
    Buck
    2.9 x 1.6 x 1.3mm
    -
    2.9mm
    Voltage Mode
    1.6mm
    1.3mm
    Texas Instruments
    -
    115 kHz
    0.15mA
    -
    -
    -
    -
    -
    -
    -
    -
    Surface Mount
    SOIC
    -
    20
    -
    12.8 x 7.52 x 2.35mm
    -
    -
    -
    -
    -
    onsemi
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Texas Instruments
    -
    -
    -
    -
    -
    -
    1 to 50 V
    3 A
    -
    1
    -
    Surface Mount
    SOIC
    -
    8
    -
    4.9 x 3.91 x 1.58mm
    -
    4.9mm
    SMPS
    3.91mm
    1.58mm
    onsemi
    -
    300 kHz
    -
    360mA
    0.6A
    9 mA
    -
    -
    -
    -
    -
    Surface Mount
    SOP
    -
    16
    -
    10.2 x 5.3 x 1.8mm
    -
    -
    -
    -
    -
    Renesas Electronics
    -
    1 MHz
    -
    -
    -
    -
    0 → 3.05 V
    -
    -
    2
    -
    -
    QFN-48
    -
    48
    -
    -
    -
    -
    -
    -
    -
    Renesas Electronics
    -
    650 kHz
    2µA
    1mA
    1mA
    6 mA
    -
    -
    -
    1
    -
    Surface Mount
    QFN
    -
    32
    -
    5 x 5 x 0.9mm
    -
    -
    -
    -
    -
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