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. 811-5661
Mfr. Part No.LM5046MH/NOPB
R 89.38
Each
units
540 kHz 80mA 1.5A 2A 4.6 mA Yes Surface Mount HTSSOP 28 9.7 x 4.4 x 0.9mm 9.7mm 4.4mm 0.9mm 100 V
RS stock no. 125-0802
Mfr. Part No.ISL68127IRAZ-T7A
BrandIntersil
R 82.06
Each
units
1000 kHz - - - 90.5 mA - Surface Mount QFN 48 6 x 6 x 0.95mm 6mm 6mm 0.95mm +3.3 V
RS stock no. 125-0801
Mfr. Part No.ISL68124IRAZ-T7A
BrandIntersil
R 132.21
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. 121-7273
Mfr. Part No.ISL8117FRZ-T7A
BrandIntersil
R 72.14
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. 462-2418
Mfr. Part No.TL5001ACD
R 37.37
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. 170-8155
Mfr. Part No.ISL68127IRAZ-T7A
BrandIntersil
R 132.099
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
RS stock no. 170-8147
Mfr. Part No.ISL8117FRZ-T7A
BrandIntersil
R 50.142
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. 162-5092
Mfr. Part No.LM5026MT/NOPB
R 45.414
Each (In a Tube of 92)
units
590 kHz - - - - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5mm 4.4mm 0.9mm -
RS stock no. 796-9489
Mfr. Part No.TS19375CS RLG
R 6.746
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. 170-8146
Mfr. Part No.ISL8117AFRZ-T7A
BrandIntersil
R 30.517
Each (On a Reel of 250)
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. 162-7708
Mfr. Part No.LM5046MH/NOPB
R 81.362
Each (In a Tube of 48)
units
540 kHz 80mA 1.5A 2A 4.6 mA Yes Surface Mount HTSSOP 28 9.7 x 4.4 x 0.9mm 9.7mm 4.4mm 0.9mm 100 V
RS stock no. 177-7275
Mfr. Part No.LT1245CS8#PBF
R 46.055
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. 175-1176
Mfr. Part No.STCH03TR
R 9.102
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. 652-5779
Mfr. Part No.UCC2895DW
R 134.04
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
RS stock no. 170-8154
Mfr. Part No.ISL68124IRAZ-T7A
BrandIntersil
R 94.341
Each (On a Reel of 250)
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. 162-6749
Mfr. Part No.TL494CNSR
R 3.591
Each (On a Reel of 2000)
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. 805-1804
Mfr. Part No.NCP3011DTBR2G
R 17.124
Each (On a Tape of 10)
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. 825-5488
Mfr. Part No.UCC28251RGPT
R 33.605
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. 121-6370
Mfr. Part No.NCP1031DR2G
R 12.014
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. 126-2018
Mfr. Part No.MCP19124-E/MJ
BrandMicrochip
R 38.03
Each
units
2 MHz - 0.5 A, 1 A 0.5 A, 1 A - - Surface Mount QFN 24 4 x 4 x 0.85mm 4mm 4mm 0.85mm 42 V