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. 761-5980
Mfr. Part No.LM5070MTC-50/NOPB
SGD3.83
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. 655-4389
Mfr. Part No.LM5026MT/NOPB
SGD3.358
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. 823-0016
Mfr. Part No.LTC3723EGN-1#PBF
SGD11.20
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. 155-7734
Mfr. Part No.LTC3723EGN-1#PBF
SGD11.285
Each (In a Tube of 100)
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. 462-1083
Mfr. Part No.TL1451ACD
SGD1.842
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. 162-5092
Mfr. Part No.LM5026MT/NOPB
SGD4.018
Each (In a Tube of 92)
units
590 kHz - - - - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5mm 4.4mm 0.9mm -
RS Stock No. 162-8594
Mfr. Part No.LM5039MH/NOPB
SGD5.909
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. 825-5488
Mfr. Part No.UCC28251RGPT
SGD5.20
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. 828-7444
Mfr. Part No.AP3105NVKTR-G1
SGD0.308
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. 824-6914
Mfr. Part No.LM5039MH/NOPB
SGD5.585
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. 877-2826
Mfr. Part No.SG2525AN
SGD1.676
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. 774-1098
Mfr. Part No.FLS0116MX
SGD0.96
Each (In a Bag of 2)
units
300 kHz 150µA - - 1.2 mA - Surface Mount SOIC 7 5 x 4 x 1.5mm 5mm 4mm 1.5mm 17 V
RS Stock No. 528-123
Mfr. Part No.TL494CN
SGD0.604
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. 162-9674
Mfr. Part No.TL494CDR2G
SGD0.375
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. 823-7884
Mfr. Part No.MCP1631-E/ML
BrandMicrochip
SGD2.022
Each (In a Pack of 5)
units
2 MHz - -9.8mA 12mA - - Surface Mount QFN 20 4 x 4 x 1mm 4mm 4mm 1mm 5.5 V
RS Stock No. 828-7441
Mfr. Part No.AP3105NAKTR-G1
SGD0.308
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. 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. 864-4746
Mfr. Part No.FLS0116MX
SGD0.813
Each (On a Reel of 2500)
units
300 kHz 150µA - - - - Surface Mount SOIC 7 5 x 4 x 1.5mm 5mm 4mm 1.5mm 20 V
RS Stock No. 168-8876
Mfr. Part No.SG2525AN
SGD1.696
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. 813-6633
Mfr. Part No.LM25037QMT/NOPB
SGD5.88
Each (In a Pack of 4)
units
578 kHz 80µA 1.2A 1.2A 4 mA - Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm 75 V
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