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. 170-8910
Mfr. Part No.AP3105NAKTR-G1
€0.15
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. 828-7444
Mfr. Part No.AP3105NVKTR-G1
€0.116
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. 162-5094
Mfr. Part No.LM5034MTC/NOPB
€3.148
Each (In a Tube of 73)
units
200 kHz, 600 kHz - - - - - Surface Mount TSSOP 20 6.5 x 4.4 x 0.9mm 6.5mm 4.4mm 0.9mm 100 V
RS Stock No. 526-947
Mfr. Part No.SG2524DR
€0.844
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
RS Stock No. 655-4389
Mfr. Part No.LM5026MT/NOPB
€3.01
Each (In a Pack of 5)
units
590 kHz - - - - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5mm 4.4mm 0.9mm -
RS Stock No. 177-7275
Mfr. Part No.LT1245CS8#PBF
€2.76
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
RS Stock No. 125-0801
Mfr. Part No.ISL68124IRAZ-T7A
BrandIntersil
€8.02
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. 661-8449
Mfr. Part No.TL1451ACPW
€2.53
Each
units
- - - - - - Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 5mm 4.4mm 1.15mm -
RS Stock No. 126-2018
Mfr. Part No.MCP19124-E/MJ
BrandMicrochip
€1.98
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. 527-322
Mfr. Part No.UCC2808D-1
€2.84
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. 121-6370
Mfr. Part No.NCP1031DR2G
€0.655
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. 821-5216
Mfr. Part No.NCP1351BDR2G
€0.294
Each (In a Pack of 20)
units
65 kHz 10µA 289µA - 20 mA - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm 22 V
RS Stock No. 162-9009
Mfr. Part No.NCP3011DTBR2G
€0.572
Each (On a Reel of 2500)
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. 864-4746
Mfr. Part No.FLS0116MX
€0.401
Each (On a Reel of 2500)
units
300 kHz 150µA - - - - Surface Mount SOIC 7 5 x 4 x 1.5mm 5mm 4mm 1.5mm 20 V
RS Stock No. 125-0803
Mfr. Part No.ISL68134IRAZ-T7A
BrandIntersil
€8.49
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. 786-2543
Mfr. Part No.TL494CDR2G
€0.494
Each (In a Pack of 10)
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
RS Stock No. 786-2552
Mfr. Part No.TL594CDR2G
€0.21
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. 162-7999
Mfr. Part No.UCD9224RGZT
€5.101
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. 145-7406
Mfr. Part No.LT1241CS8#PBF
€3.289
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
RS Stock No. 145-1163
Mfr. Part No.UCC28600D
€1.155
Each (In a Tube of 75)
units
130 kHz - - - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm 21 V
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