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 4,502
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. 162-7999
Mfr. Part No.UCD9224RGZT
kr 36,757
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
RS Stock No. 162-8594
Mfr. Part No.LM5039MH/NOPB
kr 39,136
Each (In a Tube of 73)
Units
2 MHz 70µA 6mA 2A 6 mA Yes Surface Mount HTSSOP 20 6.5 x 4.4 x 0.9mm 6.5mm 4.4mm 0.9mm 105 V
RS Stock No. 168-4860
Mfr. Part No.UCC2808D-1
kr 22,14
Each (In a Tube of 75)
Units
1 MHz - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 15 V
RS Stock No. 655-4389
Mfr. Part No.LM5026MT/NOPB
kr 30,828
Each (In a Pack of 5)
Units
590 kHz - - - - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5mm 4.4mm 0.9mm -
RS Stock No. 761-5980
Mfr. Part No.LM5070MTC-50/NOPB
kr 32,40
Each
Units
- - 800mA 800mA 3 mA - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5mm 4.4mm 0.9mm 75 V
RS Stock No. 526-947
Mfr. Part No.SG2524DR
kr 8,414
Each (In a Pack of 10)
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. 661-6875
Mfr. Part No.TL494IDR
kr 4,626
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. 462-2418
Mfr. Part No.TL5001ACD
kr 9,244
Each (In a Pack of 5)
Units
- - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS Stock No. 121-9385
Mfr. Part No.UCC28950PW
kr 57,022
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. 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. 462-1083
Mfr. Part No.TL1451ACD
kr 18,166
Each (In a Pack of 5)
Units
- - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm -
RS Stock No. 178-9135
Mfr. Part No.SG3524D
kr 11,544
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. 181-348
Mfr. Part No.LM5022MM/NOPB
kr 25,584
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. 145-1180
Mfr. Part No.SG2524D
kr 8,599
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
kr 10,11
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
New
RS Stock No. 197-7630
Mfr. Part No.UCC3895DW
kr 72,68
Each
Units
500 KHz 0.25mA - - 30 mA - - SOIC 20 - - - - -
RS Stock No. 824-6914
Mfr. Part No.LM5039MH/NOPB
kr 43,47
Each (In a Pack of 2)
Units
2 MHz 70µA 6mA 2A 6 mA Yes Surface Mount HTSSOP 20 6.5 x 4.4 x 0.9mm 6.5mm 4.4mm 0.9mm 105 V
RS Stock No. 121-9013
Mfr. Part No.UCC2895DW
kr 64,701
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. 920-3479
Mfr. Part No.TL494IN
kr 5,372
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