PWM Controllers

Pulse width modulation (PWM) is a modulation technique that is used to encode a message into a pulsing signal. PWM controllers encode data onto the duty cycle (the ratio or percentage of one period in which a signal or system is active). The encoded data is commonly used in power electronic systems to regulate the amount of power applied to the load. 


How do PWM controllers work?

A PMC will use voltage feedback to ensure that the voltage applied to a load is precisely controlled. The controller will supervise the switching operation to regulate the output voltage by comparing output voltage with the desired output to derive the correct voltage. They are popular because of their high efficiency over a wide voltage input range.


A PWM controller can also be integrated with a hot swap controller for enhanced power monitoring accuracy.


What are PWM controllers used for?

PWM controllers are common in many applications including variable speed fans, house dimmer switches and electric cookers. 


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Description Price Maximum Switching Frequency Start-up Supply Current Maximum Source Current Maximum Sink Current Maximum Supply Current Zero Power Detection Mounting Type Package Type Pin Count Dimensions Length Width Height Maximum Operating Supply Voltage
RS Stock No. 415-1045
Mfr. Part No.L6598D
€2.04
Each
units
400 kHz 0.25mA 250mA 450mA 25 mA - Surface Mount SOIC 16 10 x 4 x 1.64mm 10mm 4mm 1.64mm 16.6 V
RS Stock No. 168-6083
Mfr. Part No.L6598D
€1.721
Each (In a Tube of 50)
units
400 kHz 0.25mA 250mA 450mA 25 mA - Surface Mount SOIC 16 10 x 4 x 1.64mm 10mm 4mm 1.64mm 16.6 V
RS Stock No. 168-8876
Mfr. Part No.SG2525AN
€0.936
Each (In a Tube of 25)
units
400 kHz 80µA 400mA 400mA 20 mA - Through Hole PDIP 16 20 x 7.1 x 5.1mm 20mm 7.1mm 5.1mm 35 V
RS Stock No. 877-2826
Mfr. Part No.SG2525AN
€0.936
Each (In a Pack of 10)
units
400 kHz 80µA 400mA 400mA 20 mA - Through Hole PDIP 16 20 x 7.1 x 5.1mm 20mm 7.1mm 5.1mm 35 V
RS Stock No. 920-3479
Mfr. Part No.TL494IN
€0.504
Each (In a Tube of 25)
units
300 kHz - - - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm 40 V
RS Stock No. 517-2986
Mfr. Part No.TL494IN
€0.612
Each (In a Pack of 5)
units
300 kHz - - - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm 40 V
RS Stock No. 528-123
Mfr. Part No.TL494CN
€0.348
Each (In a Tube of 25)
units
300 kHz - - - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm 40 V
RS Stock No. 162-4341
Mfr. Part No.TL5001CP
€1.457
Each (In a Tube of 50)
units
500 kHz - - - 2.1 mA - Through Hole PDIP 8 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS Stock No. 200-6779
Mfr. Part No.TL5001CP
€1.71
Each
units
500 kHz - - - 2.1 mA - Through Hole PDIP 8 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS Stock No. 652-5779
Mfr. Part No.UCC2895DW
€5.05
Each
units
1 MHz 150µA - - - - Surface Mount SOIC 20 12.8 x 7.52 x 2.35mm 12.8mm 7.52mm 2.35mm 16.5 V
RS Stock No. 121-9164
Mfr. Part No.TL494IDR
€0.124
Each (On a Reel of 2500)
units
300 kHz - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 40 V
RS Stock No. 661-6875
Mfr. Part No.TL494IDR
€0.44
Each (In a Pack of 5)
units
300 kHz - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 40 V
RS Stock No. 121-9013
Mfr. Part No.UCC2895DW
€4.269
Each (In a Tube of 25)
units
1 MHz 150µA - - - - Surface Mount SOIC 20 12.8 x 7.52 x 2.35mm 12.8mm 7.52mm 2.35mm 16.5 V
RS Stock No. 779-9164
Mfr. Part No.LT1241CS8#PBF
€4.565
Each (In a Pack of 2)
units
500 kHz 250µA -0.75mA 10mA 1 A - Surface Mount SOIC 8 5.004 x 3.988 x 1.498mm 5mm 3.988mm 1.498mm 5.075 V
RS Stock No. 686-8433
Mfr. Part No.L6598
€1.935
Each (In a Pack of 2)
units
400 kHz 0.25mA 250mA 450mA 25 mA - Through Hole PDIP 16 20 x 7.1 x 5.1mm 20mm 7.1mm 5.1mm 16.6 V
RS Stock No. 162-8863
Mfr. Part No.UCC28251RGPT
€2.369
Each (On a Reel of 250)
units
1.8 MHz 275µA 8mA 9mA 275 μA Yes Surface Mount QFN 20 4.15 x 4.15 x 0.95mm 4.15mm 4.15mm 0.95mm 17 V
RS Stock No. 786-2445
Mfr. Part No.NCP1031DR2G
€1.705
Each (In a Pack of 2)
units
325 kHz 3mA 140µA 900µA 4 mA - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 16 V
RS Stock No. 121-6370
Mfr. Part No.NCP1031DR2G
€0.772
Each (On a Reel of 2500)
units
325 kHz 3mA 140µA 900µA 4 mA - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 16 V
RS Stock No. 121-9385
Mfr. Part No.UCC28950PW
€5.719
Each (In a Tube of 60)
units
1 MHz 270µA -0.5mA 5.75mA 10 mA Yes Surface Mount TSSOP 24 7.9 x 4.5 x 1.05mm 7.9mm 4.5mm 1.05mm 17 V
RS Stock No. 823-0016
Mfr. Part No.LTC3723EGN-1#PBF
€10.05
Each
units
1 MHz 230µA 700µA 5mA 8 mA - Surface Mount SSOP 16 4.978 x 3.988 x 1.501mm 4.98mm 3.988mm 1.501mm 9.5 V
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