Current Sense Transformers ELECTRONICS INC. EPC3108G-XXX • Designed for Switching Supply-Current Sense Applications • Optimal Performance at 250 KHz and above • Operating Temperature : -25°C to +105°C • UL1446 Class B Insulating System • Class B 130°C Insulation System • UL94V0 Recognized Materials Electrical Parameters @ 25° C PCA Part Number EPC3108G-125 EPC3108G-100 EPC3108G-85 EPC3108G-70 EPC3108G-50 EPC3108G-40 EPC3108G-30 Turns Ratio (Pri. to Sec.) 1:125 1:100 1:85 1:70 1:50 1:40 1:30 Inductance (µH Min.) @ 10 KHz 3000 2000 1430 980 500 320 180 Secondary DCR (Ω Max.) 7.70 6.20 5.30 4.75 2.50 1.35 1.00 Primary (Amps Max.) Insulation Resistance (meg Ω Min.) 10 10 10 10 10 10 10 6.0 6.0 6.0 6.0 6.0 6.0 6.0 Vt (V-µSec. Max.) 92.5 75.0 62.5 52.5 27.5 30.0 22.5 • Note : Clamp cover is optional • Package Application Circuit Power Transformer .210 Max. (5.33) Ipk Isecondary 1T Copper Plate .330 Max. (8.50) RT .073 (1.85) .275 ± .015 (6.99 ± .381) D Current Sense Transformer G S .063 (1.60) 8 4 2 5 V Ref. = Ipk RT/N Recommended Pad Layout .020 (.500) 3 .098 (2.50) .027 (.700) Schematic .106 (2.70) 7 1 6 .078 (2.00) Vref N .073 (1.85) .047 (1.20) 8 7 .118 (3.00) 6 1:N 4 .051 (1.30) Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25 PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 Product performance is limited to specified parameters. Data is subject to change without prior notice. CSC3108G-XXX Rev. 2 1/11/07 RR TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com