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. 110-9090
Mfr. Part No.ICE2QS03GXUMA1
BrandInfineon
MYR4.09
Each (In a Pack of 10)
units
65 kHz 550µA - - 2.3 mA Yes Surface Mount DSO 8 5 x 4 x 1.65mm 5mm 4mm 1.65mm 27 V
RS Stock No. 166-0829
Mfr. Part No.ICE2QS03GXUMA1
BrandInfineon
MYR4.564
Each (On a Reel of 2500)
units
65 kHz 550µA - - 2.3 mA Yes Surface Mount DSO 8 5 x 4 x 1.65mm 5mm 4mm 1.65mm 27 V
RS Stock No. 168-6083
Mfr. Part No.L6598D
MYR8.22
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. 415-1045
Mfr. Part No.L6598D
MYR9.65
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. 528-123
Mfr. Part No.TL494CN
MYR2.44
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. 686-8433
Mfr. Part No.L6598
MYR8.94
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. 168-6471
Mfr. Part No.L6598
MYR8.22
Each (In a Tube of 25)
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. 517-2986
Mfr. Part No.TL494IN
MYR2.822
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. 661-6875
Mfr. Part No.TL494IDR
MYR1.442
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. 178-9135
Mfr. Part No.SG3524D
MYR5.70
Each (In a Tube of 40)
units
450 kHz - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 40 V
RS Stock No. 517-2150
Mfr. Part No.SG3524D
MYR4.566
Each (In a Pack of 5)
units
450 kHz - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 40 V
RS Stock No. 517-0889
Mfr. Part No.TL494ID
MYR2.788
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. 170-8146
Mfr. Part No.ISL8117AFRZ-T7A
BrandIntersil
MYR13.50
Each (On a Reel of 250)
units
2375 kHz - 2A 4A 4 mA Yes Surface Mount QFN 16 4 x 4 x 0.9mm 4mm 4mm 0.9mm 60 V
RS Stock No. 862-9375
Mfr. Part No.KA7552A
MYR2.872
Each (In a Pack of 10)
units
600 kHz 15mA -5µA 65µA 1.8 mA - Through Hole PDIP 8 9.6 x 6.4 x 3.4mm 9.6mm 6.4mm 3.4mm 30 V
RS Stock No. 145-4652
Mfr. Part No.KA7552A
MYR1.905
Each (In a Tube of 50)
units
600 kHz 15mA -5µA 65µA 1.8 mA - Through Hole PDIP 8 9.6 x 6.4 x 3.4mm 9.6mm 6.4mm 3.4mm 30 V
RS Stock No. 121-9164
Mfr. Part No.TL494IDR
MYR0.863
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. 121-7272
Mfr. Part No.ISL8117AFRZ-T7A
BrandIntersil
MYR19.30
Each
units
2375 kHz - 2A 4A 4 mA Yes Surface Mount QFN 16 4 x 4 x 0.9mm 4mm 4mm 0.9mm 60 V
RS Stock No. 162-6749
Mfr. Part No.TL494CNSR
MYR1.961
Each (On a Reel of 2000)
units
300 kHz 9 → 15mA 200mA 200mA 3.5 mA Yes Surface Mount SOIC 16 10.5 x 5.6 x 1.85mm 10.5mm 5.6mm 1.85mm 40 V
RS Stock No. 168-8876
Mfr. Part No.SG2525AN
MYR4.68
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. 168-4857
Mfr. Part No.SG2524DR
MYR1.903
Each (On a Reel of 2500)
units
450 kHz - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 40 V
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