NCP12700 High Efficiency DC-DC Converter Module Design Note

PublishTime：2022-07-07

●Circuit Description
■The NCP12700 is fixed frequency, peak current mode PWM controller for single-ended switch mode power supplies (SMPS). Among its many features are a best-in-class startup linear regulator; programmability of switching frequency, soft start, and over-power protection; fully integrated slope compensation, and multiple protection functions necessary for designing efficient industrial, telecom, and transportation DC-DC power supplies with a minimum number of external components.
■This design note describes a 12 V, 15 W flyback SMPS developed with the NCP12700BDNR2G controller. The SMPS operates from an input voltage range of 9 – 36 V while achieving greater than 87% full load efficiency. The SMPS was designed to operate in both continuous and discontinuous conduction mode depending on load current and input voltage.
■A full circuit schematic, bill of materials, transformer design details, and PCB artwork are provided. The design note also contains multiple operational waveforms and performance data highlighting the features and capabilities of the NCP12700.
●Key Features
■Wide Input Range (9 – 120/200 V; MSOP10/WQFN10) Startup Regulator
■Startup Regulator Circuit capable of sourcing a minimum of 15 mA
■Programmable Over-Power Protection
■Integrated Slope Compensation
■Fault Input for Over Temperature and Output Over Voltage Fault Conditions, NTC Compatible
■1 A / 2.8 A Source / Sink Gate Driver
■Programmable Soft Start
■Overload Protection with 30 ms Timer and 1 s Auto-recovery

Brand of Product：	ON Semiconductor
Part#：	NCP12700 、 NCP431 、 C1210C225M1RACTU 、 CL31B225KBHNNNE 、 CC0603KRX7R9BB103 、 CC0603KRX7R9BB223 、 CC0603KRX7R9BB102 、 CC0603JRNPO9BN101 、 GRM31CR71H475KA12L 、 C0805C682KBRACTU 、 GRM32ER71E226KE15L 、 EEF-CX1C470R 、 GRM188R72A471KA01D 、 C2012X7T2E104K125AA 、 GRM188R61H225KE11D 、 53100C 、 502R29W102KV3E-X1Y2-SC 、 BAS20HT1G 、 MURA160T3G 、 MM3Z10VT1G 、 MM3Z15VT1G 、 BAS21DW5T1G 、 NTS10100MFST1G 、 1984617 、 IHLP2020CZER4R7M11 、 NTMFS6B14NT1G 、 1179-0-00-15-00-00-33-0 、 MMBT2222ALT1G 、 RMCF1206FT64K9 、 RMCF0603FT7K50 、 RMCF0805FT4R99 、 RMCF0603FT49K9 、 RMCF0603FT10R0 、 RMCF0603FT2R20 、 RMCF0603FT10K0 、 RMCF0603FT750R 、 RMCF1206FT20K0 、 RMCF0603FT38K3 、 RMCF0603FT2K00 、 RMCF1206FT100R 、 RMCF0603FT4K99 、 RMCF0603FT9R31 、 RMCF0603ZT0R00 、 RMCF1206ZT0R00 、 NCTS0805E3104JMT 、 5000 、 750316765 REV01 、 NCP12700BDNR2G 、 HMHA2801A 、 NCP431AVSNT1G More Part#
Product Category：	High Efficiency DC-DC Converter Module 、 peak current mode PWM controller More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	January 2018
Version Number：	Rev. 0
Data Encoding：	DN05108/D
Data Size：	1.2 MB

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