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
R 2,855.89
Each
units
16 (Microcontroller) MHz - - - - - - - - - 155mm 70mm - -
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. 165-4207
Mfr. Part No.MCP19114-E/MJ
BrandMicrochip
R 44.871
Each (In a Tube of 91)
units
- - - - - - Surface Mount QFN 24 4 x 4 x 0.85mm 4mm 4mm 0.85mm -
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. 121-7272
Mfr. Part No.ISL8117AFRZ-T7A
BrandIntersil
R 31.20
Each
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. 786-2533
Mfr. Part No.NCV494BDR2G
R 7.946
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. 828-7444
Mfr. Part No.AP3105NVKTR-G1
R 2.13
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. 165-2137
Mfr. Part No.MCP1630V-E/MS
BrandMicrochip
R 13.126
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. 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. 527-322
Mfr. Part No.UCC2808D-1
R 42.95
Each
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. 779-9164
Mfr. Part No.LT1241CS8#PBF
R 81.36
Each (In a Pack of 2)
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. 162-9586
Mfr. Part No.NCV494BDR2G
R 7.866
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. 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
RS stock no. 786-2552
Mfr. Part No.TL594CDR2G
R 10.625
Each (In a Pack of 10)
units
300 kHz 8mA -4mA 0.7mA 18 mA - Surface Mount SOIC 16 10 x 4 x 1.5mm 10mm 4mm 1.5mm 40 V
RS stock no. 155-7734
Mfr. Part No.LTC3723EGN-1#PBF
R 101.615
Each (In a Tube of 100)
units
1 MHz 230µA 700µA 5mA 8 mA - Surface Mount SSOP 16 4.978 x 3.988 x 1.501mm 4.98mm 3.988mm 1.501mm 9.5 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. 121-9013
Mfr. Part No.UCC2895DW
R 111.924
Each (In a Tube of 25)
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. 121-7263
Mfr. Part No.ISL68201IRZ-T7A
BrandIntersil
R 70.81
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. 170-8911
Mfr. Part No.AP3105NVKTR-G1
R 2.087
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. 145-7406
Mfr. Part No.LT1241CS8#PBF
R 49.314
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