Additional Resources: Product Page 3D Model date 09/13/2021 page 1 of 8 SERIES: VFK600 DESCRIPTION: DC-DC CONVERTER FEATURES up to 700 W isolated output rugged metal enclosure with integrated heat sink 2:1 input range (18~36 Vdc, 36~75 Vdc) single output from 12~48 Vdc 1,500 Vdc isolation over current, over temperature, over voltage, and short circuit protections remote on/off N+1 current sharing efficiency up to 92% input output output output ripple efficiency MODEL 1 voltage voltage current power and noise range max max max typ (Vdc) (Vdc) (A) (W) (mVp-p) (%) VFK600-D24-S12 18 ~ 36 12 50 600 120 89 VFK600-D24-S24 18 ~ 36 24 25 600 240 91 VFK600-D24-S28 18 ~ 36 28 21.5 600 280 90 VFK600-D24-S32 18 ~ 36 32 19 608 320 91 VFK600-D24-S48 18 ~ 36 48 12.5 600 480 92 VFK600-D48-S12 36 ~ 75 12 50 600 120 90 VFK600-D48-S24 36 ~ 75 24 25 600 240 91 VFK600-D48-S28 36 ~ 75 28 25 700 280 91 VFK600-D48-S32 36 ~ 75 32 19 608 320 92 VFK600-D48-S48 36 ~ 75 48 12.5 600 480 92 Notes: 1. Ripple and noise are measured at full load, 20 MHz BW with 10F tantalum capacitor and 1F ceramic capacitor across output PART NUMBER KEY VFK600 - DXX - SXX Base Number Output Voltage Input Voltage cui.comAdditional Resources: Product Page 3D Model CUI Inc SERIES: VFK600 DESCRIPTION: DC-DC CONVERTER date 09/13/2021 page 2 of 8 INPUT parameter conditions/description min typ max units 24 Vdc input models 18 24 36 Vdc operating input voltage 48 Vdc input models 36 48 75 Vdc 24 Vdc input models, Vin = 18 Vdc, full load 37.7 A input current 48 Vdc input models, Vin = 36 Vdc, full load 21.7 A power up 16 17 18 Vdc 24 Vdc input power down 15 16 17 Vdc under voltage shutdown power up 34 35 36 Vdc 48 Vdc input power down 32 33 34 Vdc power up 38 Vdc 24 Vdc input power down 40 Vdc over voltage shutdown power up 77 Vdc 48 Vdc input power down 80 Vdc models ON (3.5~7.5 Vdc or open circuit) 1 CTRL positive logic models OFF (0~0.7 Vdc) 60 A time delay fuse for 24 Vin models, input fuse 30 A time delay fuse for 48 Vin models filter pi filter Note: 1. Open collector refer to -Vin. OUTPUT parameter conditions/description min typ max units 12 V output models 470 10,000 F maximum capacitive load 24~48 V output models 470 5,000 F line regulation measured from low line to high line 0.2 % load regulation measured from zero load to full load 0.5 % voltage accuracy 1.5 % load share accuracy 50~100% load 10 % adjustability 60 110 % 48 V input, 12/28/32 V output models 300 kHz switching frequency all other models 250 kHz transient response 25% step load change 500 s temperature coefficient 0.03 %/C PROTECTIONS parameter conditions/description min typ max units short circuit protection continuous over current protection % nominal output current 110 150 % over voltage protection %Vo 115 140 % over temperature protection shutdown 110 C SAFETY AND COMPLIANCE parameter conditions/description min typ max units for 1 minute: input to output input to case isolation voltage 1,500 Vdc output to case isolation resistance 10 M RoHS 2011/65/EU (CE) cui.com