Switching Controllers – Mouser South Africa

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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 (USD) 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: $0.57 17,695In Stock	Mfr. Part No. NCP12510BSN65T1G Mouser Part No 863-NCP12510BSN65T1G	onsemi	Switching Controllers CURRENTMODE PWM CONTROLLER Learn More about onsemi NCP125x	Datasheet	17,695In Stock	Cut Tape $0.57 $0.40 $0.357 $0.311 Reel $0.238 View $0.29 $0.276 $0.257 $0.229 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: $0.55 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 $0.55 $0.424 $0.384 $0.335 Reel $0.259 View $0.311 $0.297 $0.277 $0.255 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: $0.63 26,043In Stock	Mfr. Part No. NCP1250BSN65T1G Mouser Part No 863-NCP1250BSN65T1G	onsemi	Switching Controllers ACDC SWITCH OCP AUTO Learn More about onsemi NCP125x	Datasheet	26,043In Stock	Cut Tape $0.63 $0.447 $0.401 $0.35 View Reel $0.276 $0.326 $0.311 $0.299 $0.276 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: $0.64 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 $0.64 $0.502 $0.418 $0.368 View Reel $0.297 $0.345 $0.333 $0.33 $0.297 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: $0.49 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 $0.49 $0.348 $0.313 $0.276 Reel $0.235 View $0.258 $0.247 $0.24 $0.22 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: $0.63 260In Stock	Mfr. Part No. NCP12510BSN100T1G Mouser Part No 863-NCP12510BSN100T1	onsemi	Switching Controllers CURRENT-MODE PWM CONTROLL Learn More about onsemi NCP125x	Datasheet	260In Stock	Cut Tape $0.63 $0.443 $0.397 $0.347 View Reel $0.272 $0.322 $0.299 $0.287 $0.272 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: $0.58 4,241In Stock	Mfr. Part No. NCP12510CSN65T1G Mouser Part No 863-NCP12510CSN65T1G	onsemi	Switching Controllers CURRENT-MODE PWM CONTROL	Datasheet	4,241In Stock	Cut Tape $0.58 $0.406 $0.364 $0.317 Reel $0.255 View $0.294 $0.281 $0.27 $0.24 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: $0.72 2,304In Stock 3,000Expected 2027/01/22	Mfr. Part No. NCP1251BSN100T1G Mouser Part No 863-NCP1251BSN100T1G	onsemi	Switching Controllers OCP AUTO OVP VCC LATCH Learn More about onsemi NCP125x	Datasheet	2,304In Stock 3,000Expected 2027/01/22	Cut Tape $0.72 $0.518 $0.47 $0.416 View Reel $0.34 $0.391 $0.376 $0.362 $0.34 MouseReel Available	Min.: 1 Mult.: 1 : 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: $0.65 3,367In Stock	Mfr. Part No. NCP1251CSN65T1G Mouser Part No 863-NCP1251CSN65T1G	onsemi	Switching Controllers PWM Cntlr Crnt Mode Learn More about onsemi NCP125x	Datasheet	3,367In Stock	Cut Tape $0.65 $0.459 $0.412 $0.361 Reel $0.283 View $0.335 $0.32 $0.308 $0.272 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: $0.611 1,367In Stock 3,000Expected 2026/11/06	Mfr. Part No. NCP1253BSN100T1G Mouser Part No 863-NCP1253BSN100T1G	onsemi	Switching Controllers Current Mode PWM Offline Controller Learn More about onsemi NCP125x	Datasheet	1,367In Stock 3,000Expected 2026/11/06	Cut Tape $0.611 $0.421 $0.376 $0.327 View Reel $0.25 $0.304 $0.29 $0.277 $0.25 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: $0.52 2,962In Stock	Mfr. Part No. NCP1253BSN65T1G Mouser Part No 863-NCP1253BSN65T1G	onsemi	Switching Controllers Current Mode PWM Offline Controller Learn More about onsemi NCP125x	Datasheet	2,962In Stock	Cut Tape $0.52 $0.364 $0.326 $0.283 View Reel $0.221 $0.263 $0.251 $0.24 $0.221 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: $1.12 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	$1.12 $0.805 $0.682 $0.632 View $0.594 $0.568 $0.552 $0.543	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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