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. 920-3479
Mfr. Part No.TL494IN
kr 5,372
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. 175-1176
Mfr. Part No.STCH03TR
kr 5,624
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. 168-4860
Mfr. Part No.UCC2808D-1
kr 22,14
Each (In a Tube of 75)
Units
1 MHz - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 15 V
RS Stock No. 168-5127
Mfr. Part No.TL1451ACD
kr 15,436
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. 825-3533
Mfr. Part No.TL1451ACPWR
kr 7,224
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. 126-2018
Mfr. Part No.MCP19124-E/MJ
BrandMicrochip
kr 21,49
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
RS Stock No. 121-7263
Mfr. Part No.ISL68201IRZ-T7A
BrandIntersil
kr 44,37
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. 796-9489
Mfr. Part No.TS19375CS RLG
kr 14,516
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. 786-2533
Mfr. Part No.NCV494BDR2G
kr 4,884
Each (In a Pack of 5)
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. 686-8433
Mfr. Part No.L6598
kr 20,74
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. 162-9515
Mfr. Part No.NCP3020ADR2G
kr 3,536
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. 809-5393
Mfr. Part No.TL494CNSR
kr 5,264
Each (In a Pack of 5)
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. 761-5980
Mfr. Part No.LM5070MTC-50/NOPB
kr 32,40
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. 162-4341
Mfr. Part No.TL5001CP
kr 15,477
Each (In a Tube of 50)
Units
500 kHz - - - 2.1 mA - Through Hole PDIP 8 9.81 x 6.35 x 4.57mm 9.81mm 6.35mm 4.57mm -
RS Stock No. 170-8154
Mfr. Part No.ISL68124IRAZ-T7A
BrandIntersil
kr 56,727
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. 168-6083
Mfr. Part No.L6598D
kr 17,735
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. 125-0802
Mfr. Part No.ISL68127IRAZ-T7A
BrandIntersil
kr 49,57
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
kr 79,46
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. 162-7999
Mfr. Part No.UCD9224RGZT
kr 33,331
Each (On a Reel of 250)
Units
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. 162-9674
Mfr. Part No.TL494CDR2G
kr 1,95
Each (On a Reel of 2500)
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
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