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庫存編號 809-5393
製造零件編號TL494CNSR
HK$5.284
/個 (每包:5個)
單位
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庫存編號 145-7406
製造零件編號LT1241CS8#PBF
HK$32.222
毎管:100 個
單位
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庫存編號 145-4652
製造零件編號KA7552A
HK$6.40
毎管:50 個
單位
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庫存編號 121-7263
製造零件編號ISL68201IRZ-T7A
BrandIntersil
HK$44.58
單位
1.5 MHz - - - - Yes Surface Mount QFN 24 4 x 4 x 0.85mm 4mm 4mm 0.85mm 24 V
RS庫存編號 178-8826
製造零件編號TL1451ACPWR
HK$16.415
毎管:90 個
單位
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庫存編號 779-9173
製造零件編號LT1245CS8#PBF
HK$45.37
/個 (每包:2個)
單位
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庫存編號 125-0803
製造零件編號ISL68134IRAZ-T7A
BrandIntersil
HK$84.29
單位
1000 kHz - - - 63 mA - Surface Mount TQFN 40 5 x 5 x 0.7mm 5mm 5mm 0.7mm +3.3 V
RS庫存編號 162-8594
製造零件編號LM5039MH/NOPB
HK$37.65
毎管:73 個
單位
2 MHz 70µA 6mA 2A 6 mA Yes Surface Mount HTSSOP 20 6.5 x 4.4 x 0.9mm 6.5mm 4.4mm 0.9mm 105 V
RS庫存編號 526-947
製造零件編號SG2524DR
HK$4.352
/個 (每包:10個)
單位
450 kHz - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 40 V
RS庫存編號 121-9164
製造零件編號TL494IDR
HK$1.236
個 (在毎卷:2500)
單位
300 kHz - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm 40 V
RS庫存編號 162-9009
製造零件編號NCP3011DTBR2G
HK$4.55
個 (在毎卷:2500)
單位
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庫存編號 168-5127
製造零件編號TL1451ACD
HK$14.80
毎管:40 個
單位
- - - - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 9.9mm 3.91mm 1.58mm -
RS庫存編號 761-5980
製造零件編號LM5070MTC-50/NOPB
HK$31.15
單位
- - 800mA 800mA 3 mA - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5mm 4.4mm 0.9mm 75 V
RS庫存編號 655-4389
製造零件編號LM5026MT/NOPB
HK$28.61
/個 (每包:5個)
單位
590 kHz - - - - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5mm 4.4mm 0.9mm -
RS庫存編號 125-0801
製造零件編號ISL68124IRAZ-T7A
BrandIntersil
HK$79.67
單位
1000 kHz - - - 63 mA - Surface Mount TQFN 40 5 x 5 x 0.7mm 5mm 5mm 0.7mm +3.3 V
RS庫存編號 145-4653
製造零件編號KA7553A
HK$6.10
毎管:50 個
單位
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庫存編號 823-7884
製造零件編號MCP1631-E/ML
BrandMicrochip
HK$12.66
/個 (每包:5個)
單位
2 MHz - -9.8mA 12mA - - Surface Mount QFN 20 4 x 4 x 1mm 4mm 4mm 1mm 5.5 V
RS庫存編號 162-9586
製造零件編號NCV494BDR2G
HK$5.13
個 (在毎卷:2500)
單位
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庫存編號 786-2533
製造零件編號NCV494BDR2G
HK$12.66
/個 (每包:5個)
單位
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庫存編號 162-7708
製造零件編號LM5046MH/NOPB
HK$48.43
毎管:48 個
單位
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