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 5,376
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. 526-937
Mfr. Part No.SG2524N
kr 8,634
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. 121-7272
Mfr. Part No.ISL8117AFRZ-T7A
BrandIntersil
kr 18,52
Each
Units
2375 kHz - 2A 4A 4 mA Yes Surface Mount QFN 16 4 x 4 x 0.9mm 4mm 4mm 0.9mm 60 V
RS Stock No. 812-4378
Mfr. Part No.UCD9224RGZT
kr 35,88
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. 121-6370
Mfr. Part No.NCP1031DR2G
kr 7,184
Each (On a Reel of 2500)
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. 162-8185
Mfr. Part No.LM25037QMT/NOPB
kr 30,916
Each (In a Tube of 92)
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
RS Stock No. 779-9164
Mfr. Part No.LT1241CS8#PBF
kr 46,61
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. 200-6779
Mfr. Part No.TL5001CP
kr 17,65
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. 125-0801
Mfr. Part No.ISL68124IRAZ-T7A
BrandIntersil
kr 79,96
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. 686-8433
Mfr. Part No.L6598
kr 20,385
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. 825-3533
Mfr. Part No.TL1451ACPWR
kr 6,714
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. 168-4860
Mfr. Part No.UCC2808D-1
kr 20,812
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. 813-6633
Mfr. Part No.LM25037QMT/NOPB
kr 35,368
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
RS Stock No. 162-9675
Mfr. Part No.TL594CDR2G
kr 2,687
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
RS Stock No. 145-1163
Mfr. Part No.UCC28600D
kr 11,517
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. 125-0803
Mfr. Part No.ISL68134IRAZ-T7A
BrandIntersil
kr 86,74
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. 168-6471
Mfr. Part No.L6598
kr 16,174
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. 823-7884
Mfr. Part No.MCP1631-E/ML
BrandMicrochip
kr 8,084
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. 145-1180
Mfr. Part No.SG2524D
kr 8,447
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 22,252
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 -
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