Switching Controllers – Mouser Liechtenstein

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NCP125x Current-Mode PWM Controllers

onsemi NCP125x Current-Mode PWM Controllers are capable of delivering a rugged and high-performance offline power supply in a tiny TSOP-6 package. With a supply range up to 35V, onsemi NCP125x controller hosts a jittered 65kHz or 100kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to a minimum level of 26kHz. As the power further goes down, the part enters a skip cycle while limiting the peak current.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CHF) Filter the results in the table by unit price based on your quantity.	Qty.	Topology	Number of Outputs	Switching Frequency	Duty Cycle - Max	Output Voltage	Output Current	Minimum Operating Temperature	Maximum Operating Temperature	Mounting Style	Package/Case	Packaging
Switching Controllers CURRENTMODE PWM CONTROLLER NCP12510BSN65T1G onsemi 1: CHF 0.507 16’496In Stock	Mfr. Part No. NCP12510BSN65T1G Mouser Part No 863-NCP12510BSN65T1G	onsemi	Switching Controllers CURRENTMODE PWM CONTROLLER Learn More about onsemi NCP125x	Datasheet	16’496In Stock	Cut Tape CHF 0.507 CHF 0.353 CHF 0.314 CHF 0.273 Reel CHF 0.22 View CHF 0.255 CHF 0.242 CHF 0.233 CHF 0.213 MouseReel Available	Min.: 1 Mult.: 1 : 3’000	Flyback	1 Output	65 kHz	84 %	12 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOT-23-6	Reel, Cut Tape, MouseReel
Switching Controllers CURRENTMODE PWM CONTROLLER NCP12510ASN65T1G onsemi 1: CHF 0.539 2’913In Stock	Mfr. Part No. NCP12510ASN65T1G Mouser Part No 863-NCP12510ASN65T1G	onsemi	Switching Controllers CURRENTMODE PWM CONTROLLER Learn More about onsemi NCP125x	Datasheet	2’913In Stock	Cut Tape CHF 0.539 CHF 0.38 CHF 0.339 CHF 0.295 Reel CHF 0.237 View CHF 0.273 CHF 0.261 CHF 0.25 CHF 0.23 MouseReel Available	Min.: 1 Mult.: 1 : 3’000	Flyback	1 Output	65 kHz	84 %	12 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOT-23-6	Reel, Cut Tape, MouseReel
Switching Controllers ACDC SWITCH OCP AUTO NCP1250BSN65T1G onsemi 1: CHF 0.548 23’043In Stock	Mfr. Part No. NCP1250BSN65T1G Mouser Part No 863-NCP1250BSN65T1G	onsemi	Switching Controllers ACDC SWITCH OCP AUTO Learn More about onsemi NCP125x	Datasheet	23’043In Stock	Cut Tape CHF 0.548 CHF 0.387 CHF 0.346 CHF 0.302 View Reel CHF 0.247 CHF 0.282 CHF 0.269 CHF 0.258 CHF 0.247 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3’000 : 3’000	Flyback	1 Output	65 kHz	84 %	7 V	500 mA	- 40 C	+ 125 C	SMD/SMT	TSOP-6	Reel, Cut Tape, MouseReel
Switching Controllers OCP AUTO OVP VCC LATCH NCP1251BSN65T1G onsemi 1: CHF 0.588 6’532In Stock	Mfr. Part No. NCP1251BSN65T1G Mouser Part No 863-NCP1251BSN65T1G	onsemi	Switching Controllers OCP AUTO OVP VCC LATCH Learn More about onsemi NCP125x	Datasheet	6’532In Stock	Cut Tape CHF 0.588 CHF 0.416 CHF 0.373 CHF 0.325 Reel CHF 0.267 View CHF 0.302 CHF 0.289 CHF 0.278 CHF 0.259 MouseReel Available	Min.: 1 Mult.: 1 : 3’000	Flyback	1 Output	65 kHz	84 %		500 mA	- 40 C	+ 125 C	SMD/SMT	TSOP-6	Reel, Cut Tape, MouseReel
Switching Controllers NCP1256B 65KHZ NCP1256BSN65T1G onsemi 1: CHF 0.467 4’727In Stock NRND	Mfr. Part No. NCP1256BSN65T1G Mouser Part No 863-NCP1256BSN65T1G NRND	onsemi	Switching Controllers NCP1256B 65KHZ Learn More about onsemi NCP125x	Datasheet	4’727In Stock	Cut Tape CHF 0.467 CHF 0.33 CHF 0.295 CHF 0.256 Reel CHF 0.206 View CHF 0.238 CHF 0.227 CHF 0.217 CHF 0.20 MouseReel Available	Min.: 1 Mult.: 1 : 3’000	Flyback	1 Output	65 kHz	83 %	12 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOT-23-6	Reel, Cut Tape, MouseReel
Switching Controllers CURRENT-MODE PWM CONTROLL NCP12510BSN100T1G onsemi 1: CHF 0.523 377In Stock	Mfr. Part No. NCP12510BSN100T1G Mouser Part No 863-NCP12510BSN100T1	onsemi	Switching Controllers CURRENT-MODE PWM CONTROLL Learn More about onsemi NCP125x	Datasheet	377In Stock	Cut Tape CHF 0.523 CHF 0.369 CHF 0.329 CHF 0.285 View Reel CHF 0.23 CHF 0.266 CHF 0.253 CHF 0.243 CHF 0.23 MouseReel Available	Min.: 1 Mult.: 1 : 3’000	Flyback	1 Output	100 kHz	84 %	12 V	500 mA	- 40 C	+ 125 C	SMD/SMT	TSOP-6	Reel, Cut Tape, MouseReel
Switching Controllers CURRENT-MODE PWM CONTROL NCP12510CSN65T1G onsemi 1: CHF 0.507 4’125In Stock	Mfr. Part No. NCP12510CSN65T1G Mouser Part No 863-NCP12510CSN65T1G	onsemi	Switching Controllers CURRENT-MODE PWM CONTROL	Datasheet	4’125In Stock	Cut Tape CHF 0.507 CHF 0.358 CHF 0.319 CHF 0.277 Reel CHF 0.223 View CHF 0.256 CHF 0.244 CHF 0.235 CHF 0.216 MouseReel Available	Min.: 1 Mult.: 1 : 3’000	Flyback	1 Output	65 kHz	84 %	12 V	500 mA	- 40 C	+ 125 C	SMD/SMT	TSOP-6	Reel, Cut Tape, MouseReel
Switching Controllers OCP AUTO OVP VCC LATCH NCP1251BSN100T1G onsemi 1: CHF 0.684 1’135In Stock 3’000Expected 12/1/2026	Mfr. Part No. NCP1251BSN100T1G Mouser Part No 863-NCP1251BSN100T1G	onsemi	Switching Controllers OCP AUTO OVP VCC LATCH Learn More about onsemi NCP125x	Datasheet	1’135In Stock 3’000Expected 12/1/2026	Cut Tape CHF 0.684 CHF 0.481 CHF 0.431 CHF 0.376 View Reel CHF 0.30 CHF 0.351 CHF 0.335 CHF 0.322 CHF 0.30 MouseReel Available	Min.: 1 Mult.: 1 Max.: 3’000 : 3’000	Flyback	1 Output	100 kHz	84 %		500 mA	- 40 C	+ 125 C	SMD/SMT	TSOP-6	Reel, Cut Tape, MouseReel
Switching Controllers PWM Cntlr Crnt Mode NCP1251CSN65T1G onsemi 1: CHF 0.563 3’534In Stock	Mfr. Part No. NCP1251CSN65T1G Mouser Part No 863-NCP1251CSN65T1G	onsemi	Switching Controllers PWM Cntlr Crnt Mode Learn More about onsemi NCP125x	Datasheet	3’534In Stock	Cut Tape CHF 0.563 CHF 0.399 CHF 0.358 CHF 0.312 Reel CHF 0.256 View CHF 0.29 CHF 0.277 CHF 0.267 CHF 0.248 MouseReel Available	Min.: 1 Mult.: 1 : 3’000	Flyback	1 Output	65 kHz	84 %		500 mA	- 40 C	+ 125 C	SMD/SMT	TSOP-6	Reel, Cut Tape, MouseReel
Switching Controllers Current Mode PWM Offline Controller NCP1253BSN100T1G onsemi 1: CHF 0.515 4’367In Stock	Mfr. Part No. NCP1253BSN100T1G Mouser Part No 863-NCP1253BSN100T1G	onsemi	Switching Controllers Current Mode PWM Offline Controller Learn More about onsemi NCP125x	Datasheet	4’367In Stock	Cut Tape CHF 0.515 CHF 0.365 CHF 0.326 CHF 0.284 View Reel CHF 0.227 CHF 0.262 CHF 0.25 CHF 0.24 CHF 0.227 MouseReel Available	Min.: 1 Mult.: 1 : 3’000	Flyback	1 Output	100 kHz	84 %	12 V	500 mA	- 40 C	+ 125 C	SMD/SMT	TSOP-6	Reel, Cut Tape, MouseReel
Switching Controllers Current Mode PWM Offline Controller NCP1253BSN65T1G onsemi 1: CHF 0.451 2’951In Stock	Mfr. Part No. NCP1253BSN65T1G Mouser Part No 863-NCP1253BSN65T1G	onsemi	Switching Controllers Current Mode PWM Offline Controller Learn More about onsemi NCP125x	Datasheet	2’951In Stock	Cut Tape CHF 0.451 CHF 0.316 CHF 0.283 CHF 0.245 Reel CHF 0.197 View CHF 0.227 CHF 0.217 CHF 0.209 CHF 0.193 MouseReel Available	Min.: 1 Mult.: 1 : 3’000	Flyback	1 Output	65 kHz	84 %	12 V	500 mA	- 40 C	+ 150 C	SMD/SMT	TSOP-6	Reel, Cut Tape, MouseReel
Switching Controllers ACDC SWITCH OCP AUTO onsemi NCP1250BP65G NCP1250BP65G onsemi 1: CHF 0.992 485In Stock	Mfr. Part No. NCP1250BP65G Mouser Part No 863-NCP1250BP65G	onsemi	Switching Controllers ACDC SWITCH OCP AUTO Learn More about onsemi NCP125x	Datasheet	485In Stock	CHF 0.992 CHF 0.717 CHF 0.649 CHF 0.573 View CHF 0.537 CHF 0.516 CHF 0.492 CHF 0.479 CHF 0.473	Min.: 1 Mult.: 1	Flyback	1 Output	65 kHz	84 %	7 V	500 mA	- 40 C	+ 125 C	SMD/SMT		Tube

NCP125x Current-Mode PWM Controllers

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