Switching Controllers – Mouser Canada

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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 (CAD) 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: $1.44 1,611In Stock	Mfr. Part # NCP1239BD100R2G Mouser Part # 863-NCP1239BD100R2G	onsemi	Switching Controllers NCP1239B 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	1,611In Stock	Cut Tape $1.44 $1.03 $0.929 $0.816 View Reel $0.616 $0.763 $0.732 $0.726 $0.616 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: $1.30 2,435In Stock	Mfr. Part # NCP1239DD65R2G Mouser Part # 863-NCP1239DD65R2G	onsemi	Switching Controllers NCP1239D 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,435In Stock	Cut Tape $1.30 $1.02 $0.924 $0.814 Reel $0.634 View $0.762 $0.73 $0.687 $0.616 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: $1.43 2,165In Stock	Mfr. Part # NCP1239ED100R2G Mouser Part # 863-NCP1239ED100R2G	onsemi	Switching Controllers NCP1239E 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,165In Stock	Cut Tape $1.43 $1.02 $0.924 $0.814 View Reel $0.616 $0.762 $0.73 $0.687 $0.616 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: $1.43 2,148In Stock NRND	Mfr. Part # NCP1239CD65R2G Mouser Part # 863-NCP1239CD65R2G NRND	onsemi	Switching Controllers NCP1239C 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,148In Stock	Cut Tape $1.43 $1.02 $0.924 $0.814 View Reel $0.616 $0.762 $0.73 $0.687 $0.616 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: $1.43 2,162In Stock NRND	Mfr. Part # NCP1239GD100R2G Mouser Part # 863-NCP1239GD100R2G NRND	onsemi	Switching Controllers NCP1239G 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,162In Stock	Cut Tape $1.43 $1.02 $0.924 $0.814 Reel $0.634 View $0.762 $0.73 $0.687 $0.616 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: $1.41 2,817In Stock NRND	Mfr. Part # NCP1239JD65R2G Mouser Part # 863-NCP1239JD65R2G NRND	onsemi	Switching Controllers NCP1239J 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,817In Stock	Cut Tape $1.41 $1.02 $0.919 $0.809 View Reel $0.612 $0.756 $0.726 $0.683 $0.612 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: $1.43 2,490In Stock	Mfr. Part # NCP1239ED65R2G Mouser Part # 863-NCP1239ED65R2G	onsemi	Switching Controllers NCP1239E 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,490In Stock	Cut Tape $1.43 $1.02 $0.924 $0.814 Reel $0.634 View $0.762 $0.73 $0.687 $0.616 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: $1.43 2,495In Stock	Mfr. Part # NCP1239FD65R2G Mouser Part # 863-NCP1239FD65R2G	onsemi	Switching Controllers NCP1239F 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,495In Stock	Cut Tape $1.43 $1.02 $0.924 $0.814 Reel $0.642 View $0.762 $0.73 $0.687 $0.616 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: $1.43 2,500In Stock	Mfr. Part # NCP1239LD100R2G Mouser Part # 863-NCP1239LD100R2G	onsemi	Switching Controllers NCP1239L 100KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,500In Stock	Cut Tape $1.43 $1.03 $0.927 $0.815 Reel $0.675 View $0.762 $0.73 $0.707 $0.658	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: $1.43 11,981In Stock	Mfr. Part # NCP1239AD65R2G Mouser Part # 863-NCP1239AD65R2G	onsemi	Switching Controllers NCP1239A 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	11,981In Stock	Cut Tape $1.43 $1.03 $0.923 $0.812 View Reel $0.612 $0.759 $0.727 $0.721 $0.612 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: $1.44 312In Stock 7,500On Order	Mfr. Part # NCP1239BD65R2G Mouser Part # 863-NCP1239BD65R2G	onsemi	Switching Controllers NCP1239B 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	312In Stock 7,500On Order On Order Ship Dates Mfr. #: NCP1239BD65R2G Stock: 312 Can Ship Immediately On Order: 5,000 Expected 2026-12-28 2,500 Expected 2027-11-11 Factory Lead-Time: 52 Weeks	Cut Tape $1.44 $1.03 $0.929 $0.816 View Reel $0.615 $0.763 $0.74 $0.615 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: $1.45 21In Stock NRND	Mfr. Part # NCP1239KD65R2G Mouser Part # 863-NCP1239KD65R2G NRND	onsemi	Switching Controllers NCP1239K, 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	21In Stock	Cut Tape $1.45 $1.04 $0.936 $0.824 View Reel $0.621 $0.77 $0.737 $0.732 $0.621 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: $1.43 2,430In Stock	Mfr. Part # NCP1239ID65R2G Mouser Part # 863-NCP1239ID65R2G	onsemi	Switching Controllers NCP1239I 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	2,430In Stock	Cut Tape $1.43 $1.02 $0.916 $0.805 View Reel $0.606 $0.752 $0.72 $0.716 $0.606 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: $0.644 12,500Factory Stock Available NRND	Mfr. Part # NCP1239HD65R2G Mouser Part # 863-NCP1239HD65R2G NRND	onsemi	Switching Controllers NCP1239H 65KHZ Learn More about onsemi ncp1239 controllers	Datasheet	12,500Factory Stock Available More Info Available	Reel $0.644	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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