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. 175-1177
Mfr. Part No.EVALKITSTKNX
SGD323.18
Each
units
16 (Microcontroller) MHz - - - - - - - - - 155mm 70mm - -
RS Stock No. 170-8147
Mfr. Part No.ISL8117FRZ-T7A
BrandIntersil
SGD4.926
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. 862-9375
Mfr. Part No.KA7552A
SGD1.107
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. 805-1804
Mfr. Part No.NCP3011DTBR2G
SGD1.656
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. 686-8433
Mfr. Part No.L6598
SGD3.51
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. 774-7422
Mfr. Part No.MCP1630V-E/MS
BrandMicrochip
SGD1.608
Each (In a Bag of 5)
units
1 MHz - -9mA 11mA 4.5 mA - Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V
RS Stock No. 811-5661
Mfr. Part No.LM5046MH/NOPB
SGD9.29
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. 145-4652
Mfr. Part No.KA7552A
SGD1.107
Each (In a Tube of 50)
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. 162-9515
Mfr. Part No.NCP3020ADR2G
SGD0.601
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. 661-8449
Mfr. Part No.TL1451ACPW
SGD3.01
Each
units
- - - - - - Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm -
RS Stock No. 168-6083
Mfr. Part No.L6598D
SGD2.999
Each (In a Tube of 50)
units
400 kHz 0.25mA 250mA 450mA 25 mA - Surface Mount SOIC 16 10 x 4 x 1.64mm 10mm 4mm 1.64mm 16.6 V
RS Stock No. 162-7708
Mfr. Part No.LM5046MH/NOPB
SGD8.359
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. 125-0802
Mfr. Part No.ISL68127IRAZ-T7A
BrandIntersil
SGD15.91
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. 168-4857
Mfr. Part No.SG2524DR
SGD0.628
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. 178-9135
Mfr. Part No.SG3524D
SGD2.013
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. 165-2137
Mfr. Part No.MCP1630V-E/MS
BrandMicrochip
SGD1.471
Each (In a Tube of 100)
units
1 MHz - -9mA 11mA 4.5 mA - Surface Mount MSOP 8 3 x 3 x 0.95mm 3mm 3mm 0.95mm 5.5 V
RS Stock No. 162-9586
Mfr. Part No.NCV494BDR2G
SGD0.903
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. 517-0716
Mfr. Part No.SG2524D
SGD1.686
Each (In a Pack of 5)
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
SGD3.074
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. 796-9489
Mfr. Part No.TS19375CS RLG
SGD1.06
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
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