NCP1337ADAPEVB

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All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. onsemi does not convey any license under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and hold onsemi and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. Other names and brands may be claimed as the property of others. TND318/D Rev. 0, Apr-06 60 W Adapter Documentation Package Semiconductor Components Industries, LLC, 2006 April, 2006 – Rev 0 1 TND318/D © 2006 ON Semiconductor. Disclaimer: ON Semiconductor is providing this reference design documentation package “AS IS” and the recipient assumes all risk associated with the use and/or commercialization of this design package. No licenses to ON Semiconductor’s or any third party’s Intellectual Property is conveyed by the transfer of this documentation. This reference design documentation package is provided only to assist the customers in evaluation and feasibility assessment of the reference design. It is expected that users may make further refinements to meet specific performance goals. Semiconductor Components Industries, LLC, 2006 April, 2006 – Rev 0 2 TND318/D 1 Overview This reference document describes a built-and-tested, GreenPointTM solution for a 60 W power adapter. The reference design circuit consists of one single-sided 100 mm x 52 mm printed circuit board. Height is 25 mm. An overview of the entire circuit is provided by Figure 1. As shown in that figure, ON Semiconductor devices are available for every block of adapter; and by judicious choice of design tradeoffs, optimum performance is achieved at minimum cost. Figure 1 Semiconductor Components Industries, LLC, 2006 April, 2006 – Rev 0 3 TND318/D 2 Introduction This design using NCP1337 offers a perfect solution for portable DVD , LCD TV, or monitor and notebook adapter applications. This adapter provides effective protection functions such as over-load protection, over-voltage protection, shortcircuit protection and brown-out protection. Thanks to the quasi-resonant operation and synchronous rectifier, this adapter has high efficiency and improved EMI performance. The standby consumption is lower because of the cycle skipping and soft ripple mode. Regulatory requirements addressing low standby power consumption and efficiency in active mode for external power supply (EPS) add extra constraints in the design of the adapter. These requirements target two issues: • Get rid of the losses in a no load situation (e.g., when the notebook adapter is plugged in, even when it is not connected to the computer). • Achieve a good average efficiency during various active mode load conditions (25%, 50%, 75% and 100%). Many regulations have been proposed around the word. Hereafter is the list of some of the most important ones: • Energy Star: applicable in the US and international partners o Energy Efficiency Criteria for active mode Nameplate Output Power (Pno) 0 to < 1 Watt >1 and ≤49 Watts > 49 Watts Minimum Average Efficiency in Active Mode (expressed as decimal) ≥ 0.49 * Pno ≥ (0.09 * Ln(Pno)) + 0.49 ≥ 0.84 o Energy Consumption Criteria for No Load Nameplate Output Power (Pno) 0 to 1 and ≤ 49 Watts > 49 Watts Minimum Efficiency in Active Mode 0.49 * Nameplate Output 0.09 * Ln(Nameplate Output) + 0.49 0.84 Maximum Energy Consumption in No-Load Mode 0 to 1 and ≤ 51 Watts > 51 Watts Minimum Efficiency in Active Mode 0.5 * Nameplate Output 0.09 * Ln(Nameplate Output) + 0.5 0.85 Maximum Energy Consumption in No-Load Mode Any output 0.5 Watt Where Ln (Nameplate Output) = Natural Logarithm of the nameplate output expressed in Watts • European Union Code of Conduct o No-load Power Consumption Rated Output Power > 0.3 W and < 15 W > 15 W and < 50 W > 50 W and < 60 W > 60 W and < 150 W No-load power consumption Phase 1 Phase 2 1.1.2005 1.1.2007 0.30 W 0.30 W 0.50 W 0.30 W 0.75 W 0.30 W 1.00 W 0.50 W Semiconductor Components Industries, LLC, 2006 April, 2006 – Rev 0 5 TND318/D o Energy-Efficiency Criteria for Active Mode for Phase 1 (for the period 1.1. 2005 to 31.12 2006) Rated Output Power 0 < W < 1.5 1.5 < W < 2.5 2.5 < W < 4.5 4.5 < W < 6.0 6.0 < W < 10.0 10.0 < W < 25.0 25.0