e l e c t r o n i c s i n c . push-pull low power transformer tel: (818) 892-0761 fax: (818) 894-5791 http://www.pca.com pca electronics, inc. 16799 schoenborn st. north hills, ca 91343 ? designed for use with maxim max 845 ? used in smps push-pull topology ? ul 94v-0 recognized components ? ul 1446 class b insulation system ? add ?lf?after part number for lead-free ? switching frequency : 250 khz-1 mhz ? 8 pin soic pcmcia package ? 700 vdc minimum isolation ? very low core loss epc3117s-x & epc3117s-x-lf product performance is limited to specified parameters. data is subject to change without prior notice. electrical parameters @ 25?c unless otherwise specified dimensions are in inches /mm ?.010 /.25 csc3117s & -lf rev. 4 6/5/07 jdg schematic 1 2 3 4 5 6 7 8 pri. sec. voltage (v) pca part number epc3117s-1(-lf) epc3117s-2(-lf) *epc3117s-3(-lf) *epc3117s-4(-lf) epc3117s-5(-lf) epc3117s-6(-lf) epc3117s-7(-lf) epc3117s-8(-lf) primary ocl (? typ.) 150 375 375 375 375 375 150 375 375 375 @ 100 khz, 0.1 vrms 75 75 75 75 80 80 75 75 80 75 duty cycle (%) 3.3 5 5 5 5 5 3.3 5 5 5 v in 5 5 10 10 12 24 5 5 12 15 v out ? output center tap ? output center tap voltage doubler ? output center tap ? output center tap voltage doubler voltage doubler voltage doubler voltage doubler voltage doubler rectification (half or full wave) connections turns ratio (pri. to sec.) 1:1:2:2 1:1:1.3:1.3 1:1:1.3:1.3 1:1:2.67:2.67 1:1:3:3 1:1:3:3 1:1:1:1 1:1:.67:.67 1:1:1.5:1.5 1:1:2:2 pri. :sec. 7.1 11 11 11 11 11 7.1 11 11 11 et (v-?ec.) @ 350 khz package pin 1 i.d. .150 (3.81) .088 max. (2.24) .270 (6.86) .050 (1.27) .025 (.635) .290 (7.37) .018/.022 (.457/.559) .090 (2.29) .050 (1.27) .030 (.762) .420 (10.67) .365 (9.27) pca epc3117s(-lf) date code pad layout .070 (1.78) 0?8 .008/.012 (.203/.304) .003/.010 (.076/.254) *.098 max. (2.49) for epc3117s-3/-4 { { ? ? connections : output center tap as common/return ? operating temperature : -40? to +85? notes : 1. assembly process (solder composition) 2. peak temperature rating 3. weight 4. packaging information (tube) epc3117s snpb 225? (10 +2/-0) seconds 0.3 grams 65 pcs / tube epc3117s-lf hot tin dip (sn) 260? (10 +2/-0) seconds 0.3 grams 65 pcs / tube application d1 d2 fs sd vcc 3 gnd1 gnd2 8 1 6 4 v in 5v c1 t1 c3 c2 cr1 cr2 output 5v @ 150 ma maxim max845 frequency select 2 7
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