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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

    488 สินค้าที่แสดงสำหรับ PWM

    • RS Stock No. 168-7885
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. L6699D
    Each (In a Tube of 50)
    THB64.677
    STMicroelectronics
    -
    245 kHz
    -
    -
    -
    -
    -
    -
    -
    -
    30ns
    Surface Mount
    SOIC
    60ns
    16
    Half Bridge
    10 x 4 x 1.5mm
    -
    10mm
    Voltage Mode
    4mm
    1.5mm
    • RS Stock No. 528-123
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. TL494CN
    Each (In a Tube of 25)
    THB13.708
    Texas Instruments
    -
    300 kHz
    -
    -
    -
    -
    40(Max) V
    200 (Max) mA
    -
    -
    -
    Through Hole
    PDIP
    -
    16
    -
    19.3 x 6.35 x 4.57mm
    -
    19.3mm
    -
    6.35mm
    4.57mm
    • RS Stock No. 166-1619
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. FAN7602CMX
    Each (On a Reel of 2500)
    THB14.298
    onsemi
    -
    73 kHz
    -
    -
    -
    -
    2.5 V
    450 mA
    Current
    1
    150ns
    Surface Mount
    SOP
    150ns
    8
    -
    5 x 4 x 1.5mm
    80%
    5mm
    Current Mode
    4mm
    1.5mm
    • RS Stock No. 842-7857P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. NCP1077P065G
    Each (Supplied in a Tube)
    THB41.884
    onsemi
    -
    65 kHz
    -
    -
    -
    -
    -
    800 mA
    Current
    1
    10ns
    Through Hole
    PDIP
    20ns
    7
    Flyback
    10.16 x 7.11 x 4.95mm
    73%
    10.16mm
    Current Mode
    7.11mm
    4.95mm
    • RS Stock No. 753-2964
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. ICE3BR0665JXKLA1
    Each: (In a Pack of 2)
    THB96.635
    Infineon
    Zero Power Detection
    65 kHz
    -
    -
    -
    -
    650 V
    9.95 A
    Current
    1
    30ns
    Through Hole
    DIP
    30ns
    8
    Flyback
    9.77 x 6.6 x 4.8mm
    75%
    9.77mm
    Current Mode
    6.6mm
    4.8mm
    • RS Stock No. 631-361
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. MCP16312-E/MSVAO
    Each (In a Box of 300)
    THB58.507
    Microchip
    -
    575 kHz
    -
    1A
    -
    44 μA
    2 → 24 V
    -
    -
    1
    -
    -
    MSOP
    -
    8
    -
    -
    -
    -
    -
    -
    -
    • RS Stock No. 165-8404
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. AP3125AKTR-G1
    Each (On a Reel of 3000)
    THB11.28
    DiodesZetex
    -
    70 kHz
    -
    -
    -
    -
    -
    350 mA
    Current
    1
    100ns
    Surface Mount
    SOT-26
    250ns
    6
    Flyback
    3.1 x 1.7 x 1.3mm
    80%
    3.1mm
    Current Mode
    1.7mm
    1.3mm
    • RS Stock No. 258-4121
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. TLE73683EXUMA3
    Each
    THB358.79
    Infineon
    -
    425 kHz
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • RS Stock No. 258-4121P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. TLE73683EXUMA3
    Each (Supplied on a Reel)
    THB358.79
    Infineon
    -
    425 kHz
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    • RS Stock No. 714-7850P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. SG3524P
    Each (Supplied in a Tube)
    THB61.15
    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
    • RS Stock No. 714-7850
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. SG3524P
    Each: (In a Pack of 2)
    THB61.15
    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
    • RS Stock No. 516-5168
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. UC3844BNG
    Each
    THB57.18
    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
    • RS Stock No. 185-8092
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. NCV1060BD100R2G
    Each (On a Reel of 2500)
    THB32.079
    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
    • RS Stock No. 244-1588P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. ICE2QS02GXUMA1
    Each (Supplied on a Reel)
    THB42.748
    Infineon
    Zero Power Detection
    250 kHz
    300µA
    -
    -
    1.5 mA
    10 V
    -
    Current
    -
    30ns
    -
    PG-DSO
    70ns
    8
    Flyback
    5 x 4 x 1.73mm
    -
    5mm
    Resonant
    4mm
    1.73mm
    • RS Stock No. 244-1588
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. ICE2QS02GXUMA1
    Each: (In a Pack of 5)
    THB42.748
    Infineon
    Zero Power Detection
    250 kHz
    300µA
    -
    -
    1.5 mA
    10 V
    -
    Current
    -
    30ns
    -
    PG-DSO
    70ns
    8
    Flyback
    5 x 4 x 1.73mm
    -
    5mm
    Resonant
    4mm
    1.73mm
    • RS Stock No. 802-3133
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. NCP1253BSN65T1G
    Each: (In a Pack of 20)
    THB13.92
    onsemi
    -
    65 kHz
    -
    -
    -
    -
    14 V
    500 mA
    Current
    1
    30ns
    Surface Mount
    TSOP
    40ns
    6
    Flyback
    3.1 x 1.7 x 1mm
    84%
    3.1mm
    Current Mode
    1.7mm
    1mm
    • RS Stock No. 802-3133P
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. NCP1253BSN65T1G
    Each (Supplied on a Reel)
    THB13.92
    onsemi
    -
    65 kHz
    -
    -
    -
    -
    14 V
    500 mA
    Current
    1
    30ns
    Surface Mount
    TSOP
    40ns
    6
    Flyback
    3.1 x 1.7 x 1mm
    84%
    3.1mm
    Current Mode
    1.7mm
    1mm
    • RS Stock No. 686-5024
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. UC3843BN
    Each: (In a Pack of 10)
    THB17.919
    STMicroelectronics
    -
    500 kHz
    -
    -
    -
    -
    -
    1 A
    Current
    1
    50ns
    Through Hole
    PDIP
    50ns
    8
    Boost, Flyback, Forward
    10.92 x 6.6 x 3.32mm
    100%
    10.92mm
    Current Mode
    6.6mm
    3.32mm
    • RS Stock No. 170-3375
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. NCP12510ASN65T1G
    Each (On a Reel of 3000)
    THB10.916
    onsemi
    -
    65 kHz
    -
    -
    -
    -
    8 to 14 V
    300 mA
    Current
    1
    30ns
    Surface Mount
    TSOP
    40ns
    6
    Flyback
    3.1 x 1.7 x 1mm
    84%
    3.1mm
    Current Mode
    1.7mm
    1mm
    • RS Stock No. 168-7249
    • หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No. UC2843BD1
    Each (In a Tube of 100)
    THB17.091
    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
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