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. 175-1176
Mfr. Part No.STCH03TR
MYR2.89
Each (On a Reel of 2500)
units
196 kHz 0.9mA - - 2.9 mA Yes Surface Mount SO8 8 5 x 6.2 x 1.5mm 5mm 4mm 1.5mm 23 V
RS Stock No. 121-7263
Mfr. Part No.ISL68201IRZ-T7A
BrandIntersil
MYR21.31
Each
units
1.5 MHz - - - - Yes Surface Mount QFN 24 4 x 4 x 0.85mm 4mm 4mm 0.85mm 24 V
RS Stock No. 779-9173
Mfr. Part No.LT1245CS8#PBF
MYR22.055
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
New
RS Stock No. 197-7630
Mfr. Part No.UCC3895DW
MYR43.47
Each
units
500 KHz 0.25mA - - 30 mA - - SOIC 20 - - - - -
RS Stock No. 145-0921
Mfr. Part No.LM5070MTC-50/NOPB
MYR13.37
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. 162-8863
Mfr. Part No.UCC28251RGPT
MYR12.84
Each (On a Reel of 250)
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. 877-2826
Mfr. Part No.SG2525AN
MYR4.83
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. 779-9164
Mfr. Part No.LT1241CS8#PBF
MYR22.055
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. 162-9586
Mfr. Part No.NCV494BDR2G
MYR3.418
Each (On a Reel of 2500)
units
200 kHz 7mA -4µA 0.7µA 15 mA - Surface Mount SOIC 16 10 x 4 x 1.5mm 10mm 4mm 1.5mm 40 V
RS Stock No. 162-9009
Mfr. Part No.NCP3011DTBR2G
MYR3.038
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
RS Stock No. 786-2543
Mfr. Part No.TL494CDR2G
MYR2.34
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. 825-5488
Mfr. Part No.UCC28251RGPT
MYR18.61
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. 181-348
Mfr. Part No.LM5022MM/NOPB
MYR11.026
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. 145-1163
Mfr. Part No.UCC28600D
MYR5.37
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. 145-7406
Mfr. Part No.LT1241CS8#PBF
MYR28.154
Each (In a Tube of 100)
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. 121-6370
Mfr. Part No.NCP1031DR2G
MYR4.902
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. 121-9385
Mfr. Part No.UCC28950PW
MYR33.494
Each (In a Tube of 60)
units
1 MHz 270µA -0.5mA 5.75mA 10 mA Yes Surface Mount TSSOP 24 7.9 x 4.5 x 1.05mm 7.9mm 4.5mm 1.05mm 17 V
RS Stock No. 170-8147
Mfr. Part No.ISL8117FRZ-T7A
BrandIntersil
MYR13.50
Each (On a Reel of 250)
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. 168-4860
Mfr. Part No.UCC2808D-1
MYR10.27
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. 170-8155
Mfr. Part No.ISL68127IRAZ-T7A
BrandIntersil
MYR34.23
Each (On a Reel of 250)
units
1000 kHz - - - 90.5 mA - Surface Mount QFN 48 6 x 6 x 0.95mm 6mm 6mm 0.95mm +3.3 V
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