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. 145-4652
Mfr. Part No.KA7552A
$1.24
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. 862-9375
Mfr. Part No.KA7552A
$1.24
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. 920-3479
Mfr. Part No.TL494IN
$1.01
Each (In a Tube of 25)
units
300 kHz - - - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm 40 V
RS Stock No. 517-2986
Mfr. Part No.TL494IN
$1.406
Each (In a Pack of 5)
units
300 kHz - - - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 19.3mm 6.35mm 4.57mm 40 V
RS Stock No. 415-1045
Mfr. Part No.L6598D
$4.16
Each
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. 825-3533
Mfr. Part No.TL1451ACPWR
$2.86
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. 877-2826
Mfr. Part No.SG2525AN
$2.00
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. 166-0829
Mfr. Part No.ICE2QS03GXUMA1
BrandInfineon
$0.827
Each (On a Reel of 2500)
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. 168-6083
Mfr. Part No.L6598D
$3.31
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. 661-8449
Mfr. Part No.TL1451ACPW
$3.39
Each
units
- - - - - - Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm -
RS Stock No. 178-9135
Mfr. Part No.SG3524D
$2.117
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. 178-8826
Mfr. Part No.TL1451ACPWR
$3.40
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. 517-2150
Mfr. Part No.SG3524D
$2.01
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. 110-9090
Mfr. Part No.ICE2QS03GXUMA1
BrandInfineon
$1.65
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. 168-8876
Mfr. Part No.SG2525AN
$1.97
Each (In a Tube of 25)
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. 825-5488
Mfr. Part No.UCC28251RGPT
$7.55
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. 828-7444
Mfr. Part No.AP3105NVKTR-G1
$1.015
Each (In a Pack of 25)
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. 125-0803
Mfr. Part No.ISL68134IRAZ-T7A
BrandIntersil
$17.78
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. 145-0921
Mfr. Part No.LM5070MTC-50/NOPB
$5.50
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. 811-5661
Mfr. Part No.LM5046MH/NOPB
$10.43
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
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