for further information contact your local stmicroelectronics sales office. july 2013 docid025045 rev 1 1/8 8 STEVAL-ISA114V1 5 v/0.8 w wide-range 30 khz buck converter based on the viper06xs data brief features ? universal input mains range: ? input voltage: 90 - 264 v ac ? frequency: 45 - 65 hz ? single-output voltage: ? 5 v @ 0.16 a continuous operation ? fully protected against faults (overload, feedback disconnection and overheating) ? emi: according to en55022-class-b description this document describes a 5 v- 0.15 a power supply set in buck topology with the viper06xs, a new off-line high voltage converter by stmicroelectronics, specifically developed for non-isolated smps. the features of the device include an 800 v avalanche rugged power section, pwm operation at 30 khz with frequency jittering for lower emi, limiting current with adjustable set point, on-board soft-start, safe auto-restart after a fault condition and low standby power consumption. the available protection includes a thermal shutdown with hysteresis, delayed overload protection and open loop failure protection. all protection is auto-restart mode. www.st.com
adapter features STEVAL-ISA114V1 2/8 docid025045 rev 1 1 adapter features the electrical specifications are given in table 1 , the schematic in figure 1 , and the bill of material in table 2 . table 1. electrical specifications parameter symbol value input voltage range v in [80 v ac ; 265 v ac ] output voltage v out 5 v max. output current i out 0.16 a precision of output regulation ? v out_lf 5% high frequency output voltage ripple ? v out_hf 50 mv max. ambient operating temperature t amb 60 oc table 2. bill of material name value description footprint manufacturer c1 2.2 f, 400 v electrolytic capacitor saxon c2 2.2 f, 400 v electrolytic capacitor saxon c3 2.2 f, 25 v ceramic capacitor smd: 0805 murata cfb not mounted ceramic capacitor smd: 0805 cf 100 nf, 50 v ceramic capacitor smd: 0805 murata cc not mounted ceramic capacitor smd: 0805 c7 22 nf, 25 v ceramic capacitor smd: 0805 murata c8 100 nf, 50 v ceramic capacitor smd: 0805 murata c9 100 f, 25v electrolytic capacitor rubycon, zl series d1 1n4007 high voltage rectifier do-41 fairchild d3 stth1l06 high voltage ultra fast rectifier smb (sod87) st d4 stth1l06 high voltage ultra fast rectifier smb (sod87) st daux not mounted small signal diode ic viper06xs high voltage converter sso-10 st l1 1 mh input filter inductor smd epcos l2 rfb0810-681 0.68 mh power inductor coilcraft r1 22 ohm 1 w resistor panasonic r3 1 kohm, 1% 1/4 w resistor smd: 0805 panasonic
docid025045 rev 1 3/8 STEVAL-ISA114V1 adapter features figure 1. schematic r4a 1.5 kohm, 1% 1/4 w resistor smd: 0805 panasonic r4b 22 kohm 1/4 w resistor smd: 0805 r5a 15 kohm 1/4 w resistor smd: 0805 r5b 0 ohm, 1% 1/4 w resistor smd: 0805 panasonic r6 not mounted 1/4 w resistor smd: 0805 rbl 10 kohm, 1% 1/4 w resistor smd: 0805 panasonic table 2. bill of material (continued) name value description footprint manufacturer cf r1 r4b r4a d1 cfb c2 l1 ac in gnd c1 d4 c9 l2 vout d3 c8 r5a r6 drain comp vdd lim fb drain drain drain drain gnd viper06xs c3 cc c7 r3 rbl r5b gnd am16734v1
layout STEVAL-ISA114V1 4/8 docid025045 rev 1 2 layout figure 2. layout (top) figure 3. layout (bottom) am16790v1 am16789v1
docid025045 rev 1 5/8 STEVAL-ISA114V1 layout figure 4. thermal measurement @ v in = 80 v ac , full load (170 ma), 3.3 kohm bleeder figure 5. thermal measurement @ v in = 115 v ac , full load (170 ma) 3.3 kohm bleeder figure 6. thermal measurement @ v in = 230 v ac , full load (170 ma) 3.3 kohm bleeder
layout STEVAL-ISA114V1 6/8 docid025045 rev 1 figure 7. thermal measurement @ v in = 265 v ac , full load (170 ma) 3.3 kohm bleeder
docid025045 rev 1 7/8 STEVAL-ISA114V1 revision history 3 revision history table 3. document revision history date revision changes 24-jul-2013 1 initial release.
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