Additional Resources: Product Page 3D Model date 06/11/2015 page 1 of 7 SERIES: VSK-S20 DESCRIPTION: AC-DC POWER SUPPLY FEATURES up to 20W continuous power compact board mount design universal input (85~264 Vac / 100~370 Vdc) single output from 3.3~24 Vdc over voltage, over temperature, and short circuit protections UL/cUL safety approvals efficiency up to 85% output output output ripple efficiency MODEL 1 voltage current power and noise max max typ typ (Vdc) (A) (W) (mVp-p) (%) VSK-S20-3R3U 3.3 4.1 13.5 50 74 VSK-S20-5U 5 3.5 17.5 50 78 VSK-S20-9U 9 2.1 20 50 80 VSK-S20-12U 12 1.6 20 50 82 VSK-S20-15U 15 1.3 20 50 83 VSK-S20-24U 24 0.85 20 50 85 Notes: 1. Ripple and noise are measured at 20 MHz BW by parallel cable method with 1 uF ceramic and 10 uF electrolytic capacitors on the output. PART NUMBER KEY VSK-S20 - XXU Base Number Output Voltage cui.comAdditional Resources: Product Page 3D Model CUI Inc SERIES: VSK-S20 DESCRIPTION: AC-DC POWER SUPPLY date 06/11/2015 page 2 of 7 INPUT parameter conditions/description min typ max units 85 264 Vac voltage 100 370 Vdc frequency 47 63 Hz at 115 Vac 600 mA current at 230 Vac 340 mA at 115 Vac 16 A inrush current at 230 Vac 30 A leakage current at 230 Vac, 50 Hz (RMS) 0.1 mA input fuse 3.15 A/250 V, slow-blow type (external) OUTPUT parameter conditions/description min typ max units 3.3 Vdc output model 48,000 F 5 Vdc output model 12,000 F 9 Vdc output model 7,200 F capacitive load 12 Vdc output model 5,400 F 15 Vdc output model 2,700 F 24 Vdc output model 1,800 F line regulation at full load 0.5 % load regulation at 10~100% load 1 % voltage set accuracy 2 % adjustability 10 % at 115 Vac 15 ms hold-up time at 230 Vac 80 ms switching frequency 65 kHz temperature coefficient 0.02 %/C PROTECTIONS parameter conditions/description min typ max units over current protection auto restart 110 % short circuit protection continuous, auto restart 3.3 Vdc output model 7.5 Vdc 5 Vdc output model 7.5 Vdc 9 Vdc output model 12 Vdc over voltage protection 12 Vdc output model 20 Vdc 15 Vdc output model 20 Vdc 24 Vdc output model 30 Vdc SAFETY & COMPLIANCE parameter conditions/description min typ max units input to output for 1 minute 3,000 Vac isolation voltage input to ground for 1 minute 2,000 Vac safety approvals UL60950-1, CE safety class class I conducted emissions CISPR22/EN55022, Class B radiated emissions CISPR22/EN55022, Class B ESD IEC/EN61000-4-2 Class B, contact 6 kV/air 8 kV radiated immunity IEC/EN61000-4-3 Class A, 10V/m IEC/EN61000-4-4 Class B, 2 kV EFT/burst IEC/EN61000-4-4 Class B, 4 kV (external circuit required, see figure 2) cui.com