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. 178-8826
Mfr. Part No.TL1451ACPWR
kr 17,626
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. 170-8138
Mfr. Part No.ISL68201IRZ-T7A
BrandIntersil
kr 32,667
Each (On a Reel of 250)
Units
1.5 MHz - - - - Yes Surface Mount QFN 24 4 x 4 x 0.85mm 4mm 4mm 0.85mm 24 V
RS Stock No. 786-2445
Mfr. Part No.NCP1031DR2G
kr 16,60
Each (In a Pack of 2)
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. 828-7441
Mfr. Part No.AP3105NAKTR-G1
kr 1,254
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. 809-5393
Mfr. Part No.TL494CNSR
kr 5,264
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. 162-9515
Mfr. Part No.NCP3020ADR2G
kr 3,294
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. 121-6370
Mfr. Part No.NCP1031DR2G
kr 8,085
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. 162-4865
Mfr. Part No.TL5001ACD
kr 9,383
Each (In a Tube of 75)
Units
- - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS Stock No. 162-9009
Mfr. Part No.NCP3011DTBR2G
kr 3,983
Each (On a Reel of 2500)
Units
400 kHz - 90µA 100µA 12 mA - Surface Mount TSSOP 14 5.1 x 4.5 x 1.05mm 5.1mm 4.5mm 1.05mm 28 V
New
RS Stock No. 202-5463
Mfr. Part No.A6727TR
kr 10,542
Each (On a Reel of 2500)
Units
300 kHz 0.5mA 1500mA 0.065mA 6 mA - - SO-8 8 - - - - -
RS Stock No. 121-7273
Mfr. Part No.ISL8117FRZ-T7A
BrandIntersil
kr 18,21
Each
Units
2375 kHz - 2A 2A 4 mA Yes Surface Mount QFN 16 4 x 4 x 0.9mm 4mm 4mm 0.9mm 60 V
RS Stock No. 170-8910
Mfr. Part No.AP3105NAKTR-G1
kr 1,223
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. 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. 779-9173
Mfr. Part No.LT1245CS8#PBF
kr 51,42
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. 181-348
Mfr. Part No.LM5022MM/NOPB
kr 22,134
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. 862-9384
Mfr. Part No.KA7553A
kr 2,354
Each (In a Pack of 10)
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. 125-0803
Mfr. Part No.ISL68134IRAZ-T7A
BrandIntersil
kr 88,33
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. 796-9489
Mfr. Part No.TS19375CS RLG
kr 14,516
Each (In a Pack of 10)
Units
500 kHz 8µA - - 20 μA - Surface Mount SOP 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 24 V
RS Stock No. 162-7999
Mfr. Part No.UCD9224RGZT
kr 34,219
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. 761-5980
Mfr. Part No.LM5070MTC-50/NOPB
kr 30,01
Each
Units
- - 800mA 800mA 3 mA - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5mm 4.4mm 0.9mm 75 V
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