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. 528-123
Mfr. Part No.TL494CN
kr 3,398
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. 170-8147
Mfr. Part No.ISL8117FRZ-T7A
BrandIntersil
kr 19,553
Each (On a Reel of 250)
Units
2375 kHz - 2A 2A 4 mA Yes Surface Mount QFN 16 4 x 4 x 0.9mm 4mm 4mm 0.9mm 60 V
RS Stock No. 165-2137
Mfr. Part No.MCP1630V-E/MS
BrandMicrochip
kr 8,60
Each (In a Tube of 100)
Units
1 MHz - -9mA 11mA 4.5 mA - Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V
RS Stock No. 162-9674
Mfr. Part No.TL494CDR2G
kr 1,832
Each (On a Reel of 2500)
Units
200 kHz 7mA -4mA 0.7mA 15 mA - Surface Mount SOIC 16 10 x 4 x 1.5mm 10mm 4mm 1.5mm 40 V
RS Stock No. 389-299
Mfr. Part No.UCC28600D
kr 10,09
Each (In a Pack of 5)
Units
130 kHz - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 21 V
RS Stock No. 166-0829
Mfr. Part No.ICE2QS03GXUMA1
BrandInfineon
kr 4,477
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. 786-2445
Mfr. Part No.NCP1031DR2G
kr 16,60
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. 162-9009
Mfr. Part No.NCP3011DTBR2G
kr 3,983
Each (On a Reel of 2500)
Units
400 kHz - 90µA 100µA 12 mA - Surface Mount TSSOP 14 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm 28 V
RS Stock No. 121-9013
Mfr. Part No.UCC2895DW
kr 42,56
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. 121-9164
Mfr. Part No.TL494IDR
kr 1,661
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. 517-2986
Mfr. Part No.TL494IN
kr 5,982
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. 825-5488
Mfr. Part No.UCC28251RGPT
kr 36,89
Each (In a Pack of 2)
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. 823-0016
Mfr. Part No.LTC3723EGN-1#PBF
kr 100,20
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
RS Stock No. 162-9675
Mfr. Part No.TL594CDR2G
kr 2,602
Each (On a Reel of 2500)
Units
300 kHz 8mA -4mA 0.7mA 18 mA - Surface Mount SOIC 16 10 x 4 x 1.5mm 10mm 4mm 1.5mm 40 V
New
RS Stock No. 202-5463
Mfr. Part No.A6727TR
kr 10,542
Each (On a Reel of 2500)
Units
300 kHz 0.5mA 1500mA 0.065mA 6 mA - - SO-8 8 - - - - -
RS Stock No. 162-4341
Mfr. Part No.TL5001CP
kr 14,177
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. 181-348
Mfr. Part No.LM5022MM/NOPB
kr 22,134
Each (In a Pack of 5)
Units
2 MHz - - - 4 mA - Surface Mount MSOP 10 3 x 3 x 0.86mm 3mm 3mm 0.86mm -
RS Stock No. 125-0803
Mfr. Part No.ISL68134IRAZ-T7A
BrandIntersil
kr 88,33
Each
Units
1000 kHz - - - 63 mA - Surface Mount TQFN 40 5 x 5 x 0.7mm 5mm 5mm 0.7mm +3.3 V
RS Stock No. 779-9164
Mfr. Part No.LT1241CS8#PBF
kr 45,515
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. 162-7999
Mfr. Part No.UCD9224RGZT
kr 37,772
Each (On a Reel of 250)
Units
2 MHz - - - 65 mA Yes Surface Mount QFN 48 7.15 x 7.15 x 0.95mm 7.15mm 7.15mm 0.95mm 3.6 V
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