Additional Resources: Product Page 3D Model PCB Footprint date 03/14/2013 page 1 of 4 SERIES: VHB350 DESCRIPTION: DC-DC CONVERTER FEATURES up to 350 W isolated output industry standard half brick package 2:1 input range (18~36 V, 36~75 V) single output from 3.3~28 V 1,500 V isolation over current, over temperature, over voltage, and short circuit protections remote on/off efficiency up to 92.5% RoHS 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) (%) VHB350-D24-S3R3 18 ~ 36 3.3 70 231 100 88 VHB350-D24-S5 18 ~ 36 5 70 350 100 89.5 VHB350-D24-S12 18 ~ 36 12 29.2 350 120 91.5 VHB350-D24-S24 18 ~ 36 24 14.6 350 280 90 VHB350-D24-S28 18 ~ 36 28 12.5 350 280 91 VHB350-D48-S3R3 36 ~ 75 3.3 70 231 100 89 VHB350-D48-S5 36 ~ 75 5 70 350 100 91 VHB350-D48-S12 36 ~ 75 12 29.2 350 120 92.5 VHB350-D48-S24 36 ~ 75 24 14.6 350 280 91.5 VHB350-D48-S28 36 ~ 75 28 12.5 350 280 92.5 Notes: 1. Ripple and noise are measured at 20 MHz BW with 10F tantalum capacitor and 1F ceramic capacitor across output PART NUMBER KEY VHB350 - DXX - SXX X Base Number Input Voltage Output Voltage Remote On/Off ControlBlan = Positive Logic N = Negative Logic cui.comAdditional Resources: Product Page 3D Model PCB Footprint CUI Inc SERIES: VHB350 DESCRIPTION: DC-DC CONVERTER date 03/14/2013 page 2 of 4 INPUT parameter conditions/description min typ max units 18 24 36 Vdc operating input voltage 36 48 75 Vdc 24 V input 50 Vdc 1 surge voltage 48 V input 24 V input 16 17 18 Vdc power up 48 V input 34 35 36 Vdc under voltage lockout 24 V input 15 16 17 Vdc power down 48 V input 32 33 35 Vdc 24 V input 38 Vdc turn on 48 V input 77 Vdc over voltage protection 24 V input 40 Vdc turn off 48 V input 80 Vdc positive logic remote on/off see note 2 filter PI type Notes: 1. 100 ms max 2. logic compatibility, open collector ref to -input Module ON, >3.5 to 75 Vdc or open circuit Module OFF, <1.2 Vdc OUTPUT parameter conditions/description min typ max units line regulation measured from high line to low line 0.2 % load regulation measured from full load to zero load 0.2 % voltage accuracy 1.5 % transient response 25% step load change 500 s 3 adjustability 10 % 3.3 and 5 V models 300 kHz switching frequency all other models 330 kHz temperature coefficient 0.03 %/C Notes: 3. trim-up: connect a resistor between the trim pin and +Sense trim-down: connect a resistor between the trim pin and -Sense PROTECTIONS parameter conditions/description min typ max units over voltage protection %Vo 115 140 % short circuit protection continuous current limit 105 140 % thermal shutdown case temp. 110 C SAFETY AND COMPLIANCE parameter conditions/description min typ max units input to output 1,500 Vdc isolation voltage input to case 1,500 Vdc output to case 1,500 Vdc isolation resistance 10 M isolation capacitance 1,000 pF safety approvals UL60950-1, EN60950-1 RoHS compliant yes cui.com