PWM

PWM stands for Pulse Width Modulation. Electronic circuits can contain both analogue and digital components. PWM allows you to control analogue devices using a digital signal. Many electrical designs use PWM for regulation.

Analogue signals can be on or off, but they can also be half-way on etc. Whereas a digital signal has just on or off positions. Both signals appear in electronic circuits and are required to work together. Inputs can be converted using a DAC or ADC. PWM is available to control the output of a device. For example, a PWM can convert the digital output of a microcontroller (MCU) into an analogue signal, to drive the next analogue component.

Types of PWM device:

  • 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 duty cycle?

PWM signals feature two main things, frequency and a duty cycle. Duty cycle is given as a % 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 is PWM used?

  • Motors
  • LED lighting
  • Lamps
  • Heaters/HVAC
  • Electric vehicles
  • Robotics
  • Communication systems

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Description Price Maximum Switching Frequency Start-up Supply Current Maximum Source Current Maximum Sink Current Maximum Supply Current Output Voltage Output Current Zero Power Detection Control Method Number of Outputs Fall Time Mounting Type Package Type Rise Time
RS庫存編號 919-8825
製造零件編號ICE2A265FKLA1
BrandInfineon
TWD53.30
毎管:50 個
單位
- - - - - 650 V 2 A - - 1 - Through Hole PDIP -
RS庫存編號 919-8816
製造零件編號ICE2A265FKLA1
BrandInfineon
TWD84.80
毎管:50 個
單位
- - - - - 650 V 2 A - - 1 - Through Hole PDIP -
RS庫存編號 462-7249
製造零件編號ICE2A265FKLA1
BrandInfineon
TWD105.20
/個 (每包:5個)
單位
- - - - - 650 V 2 A - - 1 - Through Hole PDIP -
RS庫存編號 857-8510
製造零件編號ICE3B0365JFKLA1
BrandInfineon
TWD29.70
毎管:2000 個
單位
76 kHz - - - - - - - Current 1 30ns Through Hole PDIP 30ns
RS庫存編號 753-2964
製造零件編號ICE3BR0665JXKLA1
BrandInfineon
TWD78.50
/個 (每包:2個)
單位
65 kHz - - - - 650 V 9.95 A - Current 1 30ns Through Hole DIP 30ns
RS庫存編號 166-1149
製造零件編號ICE3BS03LJGXUMA1
BrandInfineon
TWD16.20
個 (在毎卷:2500)
單位
73.7 kHz - - - - - - - Current 1 55ns Surface Mount DSO 150ns
RS庫存編號 168-7402
製造零件編號ICE3A1565FKLA1
BrandInfineon
TWD78.50
毎管:50 個
單位
100 kHz - - - - 650 V 6.1 A - Current 1 30ns Through Hole DIP 30ns
RS庫存編號 753-2955
製造零件編號ICE3A1565FKLA1
BrandInfineon
TWD92.00
/個 (每包:2個)
單位
100 kHz - - - - 650 V 6.1 A - Current 1 30ns Through Hole DIP 30ns
RS庫存編號 110-7480
製造零件編號ICE3A1065ELJFKLA1
BrandInfineon
TWD44.70
/個 (每包:10個)
單位
113 kHz - - - - - - - Current 1 30ns Through Hole DIP 30ns
RS庫存編號 110-9090
製造零件編號ICE2QS03GXUMA1
BrandInfineon
TWD33.20
/個 (每包:10個)
單位
65 kHz 550µA - - 2.3 mA - - Yes - 1 - Surface Mount DSO -
RS庫存編號 919-8812
製造零件編號ICE3BR0665JXKLA1
BrandInfineon
TWD66.50
毎管:50 個
單位
65 kHz - - - - 650 V 9.95 A - Current 1 30ns Through Hole DIP 30ns
RS庫存編號 168-5881
製造零件編號ICE3A1065ELJFKLA1
BrandInfineon
TWD42.60
毎管:50 個
單位
113 kHz - - - - - - - Current 1 30ns Through Hole DIP 30ns
RS庫存編號 110-7467
製造零件編號ICE3BS03LJGXUMA1
BrandInfineon
TWD33.20
/個 (每包:20個)
單位
73.7 kHz - - - - - - - Current 1 55ns Surface Mount DSO 150ns
RS庫存編號 166-0829
製造零件編號ICE2QS03GXUMA1
BrandInfineon
TWD16.20
個 (在毎卷:2500)
單位
65 kHz 550µA - - 2.3 mA - - Yes - 1 - Surface Mount DSO -