data brief for further information contact your local stmicroelectronics sales office. april 2011 doc id 018695 rev 1 1/5 5 EVL185W-LEDTV 185 w power supply with pfc and standby supply for led tv based on the l6564, l6599a and viper27l features universal input mains range: 90 264 vac - frequency 45 65 hz output voltage 1: 130 v 8 % at 620 ma for backlight output voltage 2: 24 v 8 % at 2 a for audio supply output voltage 3: 12 v 1 % at 4 a for panel supply output voltage 4: 5 v 2 % at 2 a for microproce ssor supply mains harmonics: acc. to en61000-3-2 class- d or jeita-miti class-d standby mains consumption: <170 mw at 230 vac with 50 mw load overall efficiency at full load: >90% emi: according to en55022-class-b safety: according to en60065 dimensions: 115x204 mm, 25 mm maximum component height from pcb pcb: single side, 70 m, cem-1, mixed pth/smt introduction rohs compliant description the EVL185W-LEDTV is a high-end demonstration board tailored to the specifications of a typical led tv application. the peculiarities of this design are the very high average efficiency of about 90%, without synchronous rectification, and very low no load consumption of 100 mw at 230 vac. the result is that this converter is compliant to the most demanding energy star ? eligibility criteria. the architecture is made up of two sections, based on a three-stage approach: a 10 w standby supply using the new viper27l, which delivers the 5 v standby dedicated to supplying the microprocessor and the logic circuitry, and a bigger section composed of a front-end pfc, using the new tm l6564 and an llc resonant converter, using the l6599a, delivering three output voltages: 12 v dedicated to supplying the tv panel, 24 v to supplying the audio power amplifiers, and 130 v dedicated to the backlight. the pfc stage delivers 400 v constant voltage and acts as the pre-regulator for both the llc stage and the standby supply. an external signal, referred to secondary ground, turns the pfc and the llc stage on and off. www.st.com
efficiency EVL185W-LEDTV 2/5 doc id 018695 rev 1 1 efficiency thanks to the chipset used, the main peculiariti es of this design are the very high efficiency as well as the very low input consumption during standby operation. table 1. overall efficiency measured at 230 vac mains voltage test 230 v - 50 hz 12 v 24 v 130 v 5 v pout [w] pin [w] eff. [%] vout [v] iout [a] vout [v] iout [a] vout [v] iout [a] vout [v] iout [a] 25% load eff. 11.95 1.00 24.19 0.50 12 8.89 0.15 5.05 0.50 46.09 52.00 88.6 50% load eff. 11.93 2.01 24.28 1.00 12 9.95 0.31 5.04 1.00 93.30 101.50 91.9 75% load eff. 11.90 3.01 24.38 1.50 13 1.05 0.47 5.04 1.50 141.67 151.90 93.3 100% load eff. 11.88 3.99 24.48 2.00 132. 18 0.62 5.04 2.00 187.96 201.50 93.3 average eff. 91.8 table 2. overall efficiency measured at 115 vac mains voltage test 115 v - 60 hz 12 v 24 v 130 v 5 v pout [w] pin [w] eff. [%] vout [v] iout [a] vout [v] iout [a] vout [v] iout [a] vout [v] iout [a] 25% load eff. 11.95 1.00 24.19 0.50 12 8.89 0.15 5.05 0.50 46.09 52.35 88.0 50% load eff. 11.93 2.01 24.28 1.00 12 9.95 0.31 5.04 1.00 93.30 102.85 90.7 75% load eff. 11.90 3.01 24.38 1.50 13 1.05 0.47 5.04 1.50 141.67 154.92 91.4 100% load eff. 11.87 3.99 24.47 2.00 132. 15 0.62 5.04 2.00 187.76 206.84 90.8 average eff. 90.2
EVL185W-LEDTV efficiency doc id 018695 rev 1 3/5 figure 1. standby consumption 0 i n ; m 7 = 0 o u t ; m 7 = 6
( z 6
( z ! - 6
revision history EVL185W-LEDTV 4/5 doc id 018695 rev 1 2 revision history table 3. document revision history date revision changes 04-apr-2011 1 initial release.
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