Additional Resources: Product Page 3D Model datdatee 06/09/202106/09/2021 pagepage 1 of 91 of 9 SERIES: VHK50W DESCRIPTION: DC-DC CONVERTER FEATURES up to 50 W isolated output rugged metal enclosure with integrated heat sink 4:1 input range (9~36 Vdc, 18~75 Vdc) single output from 3.3~48 Vdc 1,500 Vdc isolation over current, over temperature, over voltage, and short circuit protections remote on/off efficiency up to 83% 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) (%) VHK50W-Q24-S3R3 9 ~ 36 3.3 10 33 100 75 VHK50W-Q24-S5 9 ~ 36 5 10 50 100 79 VHK50W-Q24-S12 9 ~ 36 12 4.16 50 150 82 VHK50W-Q24-S15 9 ~ 36 15 3.33 50 150 82 VHK50W-Q24-S24 9 ~ 36 24 2.08 50 240 82 VHK50W-Q24-S28 9 ~ 36 28 1.78 50 280 82 VHK50W-Q24-S48 9 ~ 36 48 1.04 50 480 82 VHK50W-Q48-S3R3 18 ~ 75 3.3 10 33 100 76 VHK50W-Q48-S5 18 ~ 75 5 10 50 100 80 VHK50W-Q48-S12 18 ~ 75 12 4.16 50 150 83 VHK50W-Q48-S15 18 ~ 75 15 3.33 50 150 83 VHK50W-Q48-S24 18 ~ 75 24 2.08 50 240 83 VHK50W-Q48-S28 18 ~ 75 28 1.78 50 280 83 VHK50W-Q48-S48 18 ~ 75 48 1.04 50 480 83 Note: 1. Ripple and noise are measured at full load, 20 MHz BW with 10F tantalum capacitor and 1F ceramic capacitor across output. The 48 Vdc output models only require the 1F ceramic capacitor across the output. PART NUMBER KEY VHK50W - QXX - SXXX Base Number Input Voltage Output Voltage Remote On/Off Controlblan = positive logic N = negative logic cui.comAdditional Resources: Product Page 3D Model CUI Inc SERIES: VHK50W DESCRIPTION: DC-DC CONVERTER date 06/09/2021 page 2 of 9 INPUT parameter conditions/description min typ max units 24 Vdc input models 9 24 36 Vdc operating input voltage 48 Vdc input models 18 48 75 Vdc power up 8.8 Vdc 24 Vdc input power down 8 Vdc under voltage shutdown power up 17 Vdc 48 Vdc input power down 16 Vdc models ON (open circuit) positive logic models OFF (0~0.8 Vdc) 1 CTRL models ON (0~0.8 Vdc) negative logic models OFF (open circuit) filter pi filter 15A time delay fuse for 24 Vin models, input fuse 8A time delay fuse for 48 Vin models Note: 1. Open collector refer to -Vin OUTPUT parameter conditions/description min typ max units 3.3 and 5 V output models 10,000 F 12 V output models 4,160 F 15 V output models 3,330 F maximum capacitive load 24 V output models 2,080 F 28 V output models 1,780 F 48 V output models 47 1,040 F 2 line regulation measured from high line to low line 0.2 % 2 load regulation measured from full load to zero load 0.2 % 2 voltage accuracy 1 % adjustability 10 % switching frequency 300 kHz transient response 25% step load change 500 s temperature coefficient 0.03 %/C Note: 2. A 47 F aluminum capacitor is required on the output for 48 Vdc output models. PROTECTIONS parameter conditions/description min typ max units short circuit protection continuous over current protection % nominal output current 110 160 % over voltage protection 115 140 % shutdown 100 C over temperature protection restart threshold 70 C SAFETY AND COMPLIANCE parameter conditions/description min typ max units isolation voltage for 1 min: input/output input/case output/case 1,500 Vdc isolation resistance 10 M RoHS 2011/65/EU (CE) ENVIRONMENTAL parameter conditions/description min typ max units operating temperature see derating curve -40 85 C storage temperature -55 105 C cui.com