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. 155-7734
Mfr. Part No.LTC3723EGN-1#PBF
MYR34.195
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. 761-5980
Mfr. Part No.LM5070MTC-50/NOPB
MYR14.89
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. 181-348
Mfr. Part No.LM5022MM/NOPB
MYR10.184
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. 175-1177
Mfr. Part No.EVALKITSTKNX
MYR797.52
Each
units
16 (Microcontroller) MHz - - - - - - - - - 155mm 70mm - -
RS Stock No. 121-7263
Mfr. Part No.ISL68201IRZ-T7A
BrandIntersil
MYR22.84
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. 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. 796-9489
Mfr. Part No.TS19375CS RLG
MYR6.234
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. 177-7275
Mfr. Part No.LT1245CS8#PBF
MYR29.141
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. 655-4389
Mfr. Part No.LM5026MT/NOPB
MYR11.916
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. 170-4118
Mfr. Part No.TS19375CS RLG
MYR2.972
Each (On a Reel of 2500)
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. 824-6914
Mfr. Part No.LM5039MH/NOPB
MYR20.02
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. 168-4857
Mfr. Part No.SG2524DR
MYR1.903
Each (On a Reel of 2500)
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. 178-8826
Mfr. Part No.TL1451ACPWR
MYR8.704
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. 162-8863
Mfr. Part No.UCC28251RGPT
MYR11.334
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. 462-2418
Mfr. Part No.TL5001ACD
MYR9.71
Each (In a Pack of 5)
units
- - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm -
RS Stock No. 786-2543
Mfr. Part No.TL494CDR2G
MYR2.261
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. 162-9675
Mfr. Part No.TL594CDR2G
MYR1.216
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. 462-1083
Mfr. Part No.TL1451ACD
MYR8.38
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. 652-5779
Mfr. Part No.UCC2895DW
MYR23.82
Each
units
1 MHz 150µA - - - - Surface Mount SOIC 20 12.8 x 7.52 x 2.35mm 12.8mm 7.52mm 2.35mm 16.5 V
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