Switching Controllers – Mouser United Kingdom

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NCP1239 Switching Controllers

onsemi NCP1239 Switching Controllers are fixed-frequency current-mode controllers featuring a high-voltage start-up current source to provide a quick and lossless power-on sequence. This function greatly simplifies the design of the auxiliary supply and the V_CC capacitor. These NCP1239 controllers feature a timer-based fault detection circuitry that ensures a quasi-flat overload detection, independent of the input voltage. Typical applications include AC-DC converters for TVs, set-top boxes, and printers offline adapters for notebooks and netbooks.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) 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 NCP1239B 100KHZ NCP1239BD100R2G onsemi 1: £0.751 1,611In Stock	Mfr. Part No. NCP1239BD100R2G Mouser Part No 863-NCP1239BD100R2G	onsemi	Switching Controllers NCP1239B 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	1,611In Stock	Cut Tape £0.751 £0.538 £0.485 £0.426 View Reel £0.321 £0.398 £0.382 £0.378 £0.321 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	100 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239D 65KHZ NCP1239DD65R2G onsemi 1: £0.676 2,435In Stock	Mfr. Part No. NCP1239DD65R2G Mouser Part No 863-NCP1239DD65R2G	onsemi	Switching Controllers NCP1239D 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,435In Stock	Cut Tape £0.676 £0.533 £0.482 £0.424 Reel £0.33 View £0.397 £0.381 £0.358 £0.321 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239E 100KHZ NCP1239ED100R2G onsemi 1: £0.743 2,165In Stock	Mfr. Part No. NCP1239ED100R2G Mouser Part No 863-NCP1239ED100R2G	onsemi	Switching Controllers NCP1239E 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,165In Stock	Cut Tape £0.743 £0.533 £0.482 £0.424 View Reel £0.321 £0.397 £0.381 £0.358 £0.321 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	100 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239C 65KHZ NCP1239CD65R2G onsemi 1: £0.743 2,148In Stock NRND	Mfr. Part No. NCP1239CD65R2G Mouser Part No 863-NCP1239CD65R2G NRND	onsemi	Switching Controllers NCP1239C 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,148In Stock	Cut Tape £0.743 £0.533 £0.482 £0.424 View Reel £0.321 £0.397 £0.381 £0.358 £0.321 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239G 100KHZ NCP1239GD100R2G onsemi 1: £0.743 2,162In Stock NRND	Mfr. Part No. NCP1239GD100R2G Mouser Part No 863-NCP1239GD100R2G NRND	onsemi	Switching Controllers NCP1239G 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,162In Stock	Cut Tape £0.743 £0.533 £0.482 £0.424 Reel £0.33 View £0.397 £0.381 £0.358 £0.321 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	100 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239J 65KHZ NCP1239JD65R2G onsemi 1: £0.736 2,817In Stock NRND	Mfr. Part No. NCP1239JD65R2G Mouser Part No 863-NCP1239JD65R2G NRND	onsemi	Switching Controllers NCP1239J 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,817In Stock	Cut Tape £0.736 £0.531 £0.479 £0.422 View Reel £0.32 £0.395 £0.378 £0.356 £0.32 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239E 65KHZ NCP1239ED65R2G onsemi 1: £0.743 2,490In Stock	Mfr. Part No. NCP1239ED65R2G Mouser Part No 863-NCP1239ED65R2G	onsemi	Switching Controllers NCP1239E 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,490In Stock	Cut Tape £0.743 £0.533 £0.482 £0.424 Reel £0.33 View £0.397 £0.381 £0.358 £0.321 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239F 65KHZ NCP1239FD65R2G onsemi 1: £0.743 2,495In Stock	Mfr. Part No. NCP1239FD65R2G Mouser Part No 863-NCP1239FD65R2G	onsemi	Switching Controllers NCP1239F 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,495In Stock	Cut Tape £0.743 £0.533 £0.482 £0.424 Reel £0.335 View £0.397 £0.381 £0.358 £0.321 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239L 100KHZ NCP1239LD100R2G onsemi 1: £0.743 2,500In Stock	Mfr. Part No. NCP1239LD100R2G Mouser Part No 863-NCP1239LD100R2G	onsemi	Switching Controllers NCP1239L 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,500In Stock	Cut Tape £0.743 £0.537 £0.484 £0.425 Reel £0.352 View £0.397 £0.381 £0.368 £0.343	Min.: 1 Mult.: 1 : 2,500	Flyback		100 kHz	84 %		500 mA		+ 150 C	SMD/SMT	SOIC-7	Reel, Cut Tape
Switching Controllers NCP1239A 65KHZ NCP1239AD65R2G onsemi 1: £0.743 11,981In Stock	Mfr. Part No. NCP1239AD65R2G Mouser Part No 863-NCP1239AD65R2G	onsemi	Switching Controllers NCP1239A 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	11,981In Stock	Cut Tape £0.743 £0.534 £0.481 £0.423 View Reel £0.32 £0.395 £0.379 £0.376 £0.32 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239B 65KHZ NCP1239BD65R2G onsemi 1: £0.751 312In Stock 7,500On Order	Mfr. Part No. NCP1239BD65R2G Mouser Part No 863-NCP1239BD65R2G	onsemi	Switching Controllers NCP1239B 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	312In Stock 7,500On Order On Order Ship Dates Mfr. No: NCP1239BD65R2G Stock: 312 Can Dispatch Immediately On Order: 5,000 Expected 28/12/2026 2,500 Expected 11/11/2027 Factory Lead Time: 52 Weeks	Cut Tape £0.751 £0.538 £0.485 £0.426 View Reel £0.32 £0.398 £0.386 £0.32 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239K, 65KHZ NCP1239KD65R2G onsemi 1: £0.759 21In Stock NRND	Mfr. Part No. NCP1239KD65R2G Mouser Part No 863-NCP1239KD65R2G NRND	onsemi	Switching Controllers NCP1239K, 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	21In Stock	Cut Tape £0.759 £0.542 £0.488 £0.43 View Reel £0.324 £0.402 £0.384 £0.382 £0.324 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239I 65KHZ NCP1239ID65R2G onsemi 1: £0.743 2,430In Stock	Mfr. Part No. NCP1239ID65R2G Mouser Part No 863-NCP1239ID65R2G	onsemi	Switching Controllers NCP1239I 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,430In Stock	Cut Tape £0.743 £0.53 £0.478 £0.42 View Reel £0.316 £0.392 £0.375 £0.373 £0.316 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel, Cut Tape, MouseReel
Switching Controllers NCP1239H 65KHZ NCP1239HD65R2G onsemi 2,500: £0.335 12,500Factory Stock Available NRND	Mfr. Part No. NCP1239HD65R2G Mouser Part No 863-NCP1239HD65R2G NRND	onsemi	Switching Controllers NCP1239H 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	12,500Factory Stock Available More Info Available	Reel £0.335	Min.: 2,500 Mult.: 2,500 : 2,500	Flyback	1 Output	65 kHz	84 %	13.5 V	500 mA	- 40 C	+ 125 C	SMD/SMT	SOIC-7	Reel

NCP1239 Switching Controllers

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NCP1239 Switching Controllers

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