NCP12700 High Efficiency DC-DC Converter Module
■ 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 NCP12700BMTTXG controller. The SMPS operates from an input voltage range of 18 – 160 V while achieving greater than 85% full load efficiency. The SMPS was designed to operate in discontinuous conduction mode and implements secondary side synchronous rectification for improved efficiency, utilizing the NCP4308.
■ 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 in this DC- DC application.
●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
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Application note & Design Guide |
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Please see the document for details |
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MSOP10;WQFN10 |
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English Chinese Chinese and English Japanese |
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January 2018 |
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Rev. 0 |
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DN05109/D |
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1.2 MB |
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