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. 145-4652
Mfr. Part No.KA7552A
R 4.519
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. 168-8876
Mfr. Part No.SG2525AN
R 18.189
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. 168-6471
Mfr. Part No.L6598
R 28.09
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. 661-8449
Mfr. Part No.TL1451ACPW
R 42.20
Each
units
- - - - - - Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm -
RS stock no. 786-2451
Mfr. Part No.NCP3020ADR2G
R 12.733
Each (In a Pack of 10)
units
350 kHz 5.5mA 100µA 100µA 8 mA - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 28 V
RS stock no. 162-9515
Mfr. Part No.NCP3020ADR2G
R 5.603
Each (On a Reel of 2500)
units
350 kHz 5.5mA 100µA 100µA 8 mA - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 28 V
RS stock no. 686-8433
Mfr. Part No.L6598
R 36.035
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. 761-5980
Mfr. Part No.LM5070MTC-50/NOPB
R 51.86
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. 877-2826
Mfr. Part No.SG2525AN
R 19.992
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. 162-9674
Mfr. Part No.TL494CDR2G
R 3.746
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. 178-8826
Mfr. Part No.TL1451ACPWR
R 11.76
Each (In a Tube of 90)
units
500 kHz - -20µA 1.6mA 1.8 mA Yes Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm 50 V
RS stock no. 526-937
Mfr. Part No.SG2524N
R 15.077
Each (In a Pack of 10)
units
450 kHz - - - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm 40 V
RS stock no. 145-0921
Mfr. Part No.LM5070MTC-50/NOPB
R 47.216
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. 825-3533
Mfr. Part No.TL1451ACPWR
R 11.508
Each (In a Pack of 5)
units
500 kHz - -20µA 1.6mA 1.8 mA Yes Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm 50 V
RS stock no. 168-4856
Mfr. Part No.SG2524N
R 6.198
Each (In a Tube of 25)
units
450 kHz - - - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm 40 V
RS stock no. 786-2543
Mfr. Part No.TL494CDR2G
R 8.767
Each (In a Pack of 10)
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. 162-7999
Mfr. Part No.UCD9224RGZT
R 78.124
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. 812-4378
Mfr. Part No.UCD9224RGZT
R 109.85
1 Tape of 1
Tape(s)
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. 823-7884
Mfr. Part No.MCP1631-E/ML
BrandMicrochip
R 13.82
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. 165-2137
Mfr. Part No.MCP1630V-E/MS
BrandMicrochip
R 13.126
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