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. 145-0921
Mfr. Part No.LM5070MTC-50/NOPB
SGD3.992
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. 170-8911
Mfr. Part No.AP3105NVKTR-G1
SGD0.284
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. 168-5127
Mfr. Part No.TL1451ACD
SGD1.995
Each (In a Tube of 40)
units
- - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm -
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. 145-1180
Mfr. Part No.SG2524D
SGD0.757
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. 170-4118
Mfr. Part No.TS19375CS RLG
SGD0.825
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. 812-4378
Mfr. Part No.UCD9224RGZT
SGD9.70
1 Tape of 1
Tape(s)
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. 862-9384
Mfr. Part No.KA7553A
SGD0.80
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. 825-3533
Mfr. Part No.TL1451ACPWR
SGD2.246
Each (In a Pack of 5)
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. 145-4653
Mfr. Part No.KA7553A
SGD0.546
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. 110-9090
Mfr. Part No.ICE2QS03GXUMA1
BrandInfineon
SGD1.51
Each (In a Pack of 10)
units
65 kHz 550µA - - 2.3 mA Yes Surface Mount DSO 8 5 x 4 x 1.65mm 5mm 4mm 1.65mm 27 V
RS Stock No. 125-0801
Mfr. Part No.ISL68124IRAZ-T7A
BrandIntersil
SGD13.85
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. 170-8154
Mfr. Part No.ISL68124IRAZ-T7A
BrandIntersil
SGD9.944
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. 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. 121-6370
Mfr. Part No.NCP1031DR2G
SGD1.411
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. 829-0113
Mfr. Part No.MCP19114-E/MJ
BrandMicrochip
SGD5.08
Each
units
- - - - - - Surface Mount QFN 24 4 x 4 x 0.85mm 4mm 4mm 0.85mm -
RS Stock No. 170-8138
Mfr. Part No.ISL68201IRZ-T7A
BrandIntersil
SGD5.24
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. 162-7708
Mfr. Part No.LM5046MH/NOPB
SGD7.598
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. 125-0803
Mfr. Part No.ISL68134IRAZ-T7A
BrandIntersil
SGD14.65
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. 526-947
Mfr. Part No.SG2524DR
SGD0.959
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
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