EVL6566A-75WES4 19 V - 75 W SMPS compliant with latest Energy Star(R) criteria using the L6563 and the L6566A Data brief Features Universal input mains range: 90 - 264 Vac Frequency 45 - 65 Hz Output voltage: 19 V @ 4 A continuous operation Mains harmonics: Acc. to EN61000-3-2 ClassD or JEIDA-MITI Class-D Standby mains consumption: < 0.14 W @ 230 Vac, < 0.085 W @ 115 Vac Active load average efficiency: better than 87% without synchronous rectification EMI: According to EN55022-Class-B Safety: According to EN60950 Dimensions: 78x170 mm, 25 mm component maximum height PCB: Single side, 70 m, CEM-1, Mixed PTH/SMT Description This board implements a 75 W SMPS reference design, tailored to the specifications of a typical hi-end portable computer power supply (adapter). Figure 1. The peculiarities of this design are the very high efficiency at light load and the excellent global efficiency for a two-stage architecture. The high efficiency at high load is achieved without using synchronized rectification at secondary side and therefore offers a very cost effective solution. The circuit is made up of two stages: a front-end PFC using the L6563 and a flyback converter based on the L6566A. The CV/CC controller TSM1014 allows the correct current limitation on the secondary side. The flyback stage works as master and it is dedicated to controlling the circuit operation, including the standby and protections. Additionally, it switches the PFC stage on and off by means of a dedicated pin (VCC_PFC), therefore helping to achieve an excellent efficiency even at light load, with low complexity. Efficiency during active load and light load operation are compliant with Energy Star(R) Eligibility Criteria for both external (EPA rev. 2.0 EPS) and computer integrated (EPA rev. 4.0 COMPUTERS) power supplies. In addition, this design is also compliant with the latest computer requirements. EVL6566A-75WES4 Energy Star(R) compliant adapter demonstration board November 2011 Doc ID 022539 Rev 1 For further information contact your local STMicroelectronics sales office. 1/5 www.st.com 5 Doc ID 022539 Rev 1 5 0 5 0 - 0.'6 & Q) 5 0HJ 5 . & X & 1 & X) & 1 5 . & S 5 . & 1 & 1 & 1 3)&2. 7%2 9)) &6 & 1 3:0/$7&+ 3:06723 581 =&' *' *1' 9&& 08/7 5 . B & 1 5 . 5 . &203 ,19 8 /6 5 . ' 60 a & 19 5 . 5 . ' 1 & 1 5 . & Q) & Q) 5 . & 1 4 %&& 5 5 5 5 5 . & S).9 & Q) ' 1 ' 1 / 65:&479 5 5 5 0HJ 5 . & S) 5 . & X9 +6 +($76,1. 4 67)10 5 5 & X9 ' 677+/ & 1 ' *%8- & 1 5 0 ',6 &6 9&&B3)& 9&& *' *1' 1& +9 8 /$ 5 . & 1 &203 95() =&' 02'(6& 26& 66 9)) $&B2. ' 677+ 5 . 5 5 & S) & S) & 1 & 1 5 . ' // 5 . 5 . 5 5 5 . 5 . 5 0 5 0 5 0 5 5 5 . +6 +($76,1. / +)<57 5 5 4 67)10 ' 677+$ '$ .($ 5 . 5 . 7 65:(&7+ 5 5 ' 6736+&)3 ' 6736+&)3 & 1 8 6)+$ & 1 +6 +($76,1. & 1 ) )86($ a 2/5 5 . & X9 5 5 5 . & X9 5 . 5 . 5 5 5 . & 1 5 . 4 %&& 4 %&& 5 . 5 . 5 . ' %=9% 5 . 5 . 8 &9B287 *1' &&B287 9&& & 1 760$,67 & 1 &9 && && 9B5() 5 . 5 5 - 5 5 9#$ 0.'6 & 1 & 1 & 1 5 . X9 & / 76/5053) Figure 2. 9DF EVL6566A-75WES4 EVL6566A-75WES4 electrical diagram !-V EVL6566A-75WES4 Figure 3. Light load efficiency measurements (IILFLHQF\>@ 9+] 9+] (3$ 3LQ>:@ !-V Doc ID 022539 Rev 1 3/5 Revision history EVL6566A-75WES4 Revision history Table 1. 4/5 Document revision history Date Revision 28-Nov-2011 1 Changes Initial release. Doc ID 022539 Rev 1 EVL6566A-75WES4 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. 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