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. 162-6749
Mfr. Part No.TL494CNSR
SGD0.357
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. 809-5393
Mfr. Part No.TL494CNSR
SGD0.756
Each (In a Pack of 5)
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. 162-4341
Mfr. Part No.TL5001CP
SGD2.272
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
SGD2.67
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. 121-8257
Mfr. Part No.LM5022MM/NOPB
SGD1.877
Each (On a Reel of 1000)
units
2 MHz - - - 4 mA - Surface Mount MSOP 10 3 x 3 x 0.86mm 3mm 3mm 0.86mm -
RS Stock No. 168-4860
Mfr. Part No.UCC2808D-1
SGD3.52
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. 527-322
Mfr. Part No.UCC2808D-1
SGD4.18
Each
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. 181-348
Mfr. Part No.LM5022MM/NOPB
SGD3.412
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. 661-6875
Mfr. Part No.TL494IDR
SGD0.508
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. 121-9164
Mfr. Part No.TL494IDR
SGD0.218
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. 389-299
Mfr. Part No.UCC28600D
SGD1.856
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. 145-1163
Mfr. Part No.UCC28600D
SGD1.538
Each (In a Tube of 75)
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. 462-1083
Mfr. Part No.TL1451ACD
SGD2.584
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. 828-7441
Mfr. Part No.AP3105NAKTR-G1
SGD0.376
Each (In a Pack of 25)
units
70 kHz 20µA 110µA - 2 mA - Surface Mount SOT-23 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 25 V
RS Stock No. 168-5127
Mfr. Part No.TL1451ACD
SGD2.44
Each (In a Tube of 40)
units
- - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm -
RS Stock No. 170-8910
Mfr. Part No.AP3105NAKTR-G1
SGD0.35
Each (On a Reel of 3000)
units
70 kHz 20µA 110µA - 2 mA - Surface Mount SOT-23 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 25 V
RS Stock No. 170-8911
Mfr. Part No.AP3105NVKTR-G1
SGD0.266
Each (On a Reel of 3000)
units
70 kHz 20µA 110µA - 2 mA - Surface Mount SOT-23 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 25 V
RS Stock No. 145-0921
Mfr. Part No.LM5070MTC-50/NOPB
SGD4.332
Each (In a Tube of 92)
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. 828-7444
Mfr. Part No.AP3105NVKTR-G1
SGD0.694
Each (In a Pack of 25)
units
70 kHz 20µA 110µA - 2 mA - Surface Mount SOT-23 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm 25 V
RS Stock No. 877-2826
Mfr. Part No.SG2525AN
SGD1.67
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
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