for further information contact your local stmicroelectronics sales office. may 2012 doc id 023155 rev 2 1/6 6 EVLVIP37LE5V3A wide range single-output demonstration board based on the viper37le data brief features universal input mains range: ? input voltage 90 - 264 v ac ? frequency 45 - 65 hz single-output voltage: 5 v @ 3 a continuous operation standby mains consumption: < 30 mw @ 230 v ac average efficiency: > 75% complying with eup lot 6 requirements fully protected against faults (overload, overvoltage, transformer saturation and overheating) emi: according to en55022-class-b description this board implements a 15 w single-output wide range mains power supply to be used as an auxiliary adapter in applications such as lcd, plasma or led tvs, desktop computers, etc., when the main power supply is off or in standby mode and the auxiliary power supply must provide energy only to some specific parts of the equipment such as usb ports, remote receiver, etc. the board uses the new viper37le, an offline high voltage converter from the viperplus family, specifically designed for fixed frequency flyback converters, which combines a high-performance low voltage pwm controller chip and a max. 4.5 ? r ds(on) , 800 v b v(dss) , avalanche-rugged power mosfet in the same package. the application is optimized for less than 30 mw standby consumption and meets the epa 2.0 limits, therefore helping to meet the most stringent energy saving requirements. the board implements several protections that considerably increase end-product safety and reliability: overload protection, overvoltage protection, brownout protection, hysteretic thermal protection, shorted secondary rectifier detection, and transformer saturation protection: all of which are in auto-restart mode. evlvip 3 7le5v 3 a www.st.com
schematic diagram EVLVIP37LE5V3A 2/6 doc id 023155 rev 2 1 schematic diagram figure 1. EVLVIP37LE5V3A electrical diagram am11 3 41v1 l1 2.2 u h r12 3 9k ntc 10 c1 220pf. gnd 5v opto kb 8 17a opto 3 kb 8 17a c9 10nf c5 100 u f r1 2.2m vr1 t s 4 3 1 br cont drain gnd control vdd fb u1 viper 3 7le + br r6 33 0 f1 1.5 a fu s e tf d5 bat46rl ac in ac in d1 1.5ke220 d2 s tp s3 0l40ct d4 1n414 8 r1 3 47k r5 3 . 3 2 1 3 4 cm 2x25mh r 3 2m d7 1n414 8 c6 22nf ? x2 c12 22 u f c11 33 nf r 8 12k c1 3 2.2nf r4 150k d6 1 8 v c 3 1200 u f r14 3 9k r2 3 .9m jmp c4 1200 u f r10 100k c2 33u f r9 120k r7 220 d 3 s tth1l06 c10 10nf c7 2.2nf r11 33 k - c14 22nf
EVLVIP37LE5V3A output characteristics doc id 023155 rev 2 3/6 2 output characteristics figure 2. line and load regulation figure 3. no load consumption 0.0 0.5 1.0 1.5 2.0 2.5 3 .0 3 .5 4.95 5.00 5.05 5.10 5.15 115v a c 2 3 0v a c o u tp u t volt a ge [v] o u tp u t c u rrent [ma] am11 3 4 3 v1 50 100 150 200 250 3 00 10 15 20 25 3 0 3 5 40 45 50 55 60 65 no b rowno u t with b rowno u t inp u t power [mw] inp u t volt a ge [v a c] am11 3 45v1
output characteristics EVLVIP37LE5V3A 4/6 doc id 023155 rev 2 figure 4. efficiency 0246 8 10 12 14 16 72 7 3 74 75 76 77 7 8 79 epa 2.0 limit 115v a c 2 3 0v a c a ver a ge @115v a c a ver a ge @2 3 0v a c efficiency [ % ] o u tp u t power [w] am11 3 44v1
EVLVIP37LE5V3A revision history doc id 023155 rev 2 5/6 3 revision history table 1. document revision history date revision changes 26-apr-2012 1 initial release. 16-may-2012 2 updated features list in cover page. updated figure 1: EVLVIP37LE5V3A electrical diagram on page 2
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