24IBX15-50-0G Bel Fuse

IBX15 Series Boost Converters The boost converters were designed in accordance with the standards EN 50155 and EN 50121-3-2 to meet the requirements of various railway and industrial applications in rugged environ ment. They are particularly suitable to expand the input voltage range of power supplies (e.g. 110IMY15 or 110IMY70 Series DC-DC converters). An additional circuit allows for providing a predefined interruption time. When the input voltage exceeds a predefined output voltage level, the input voltage is directly fed forward. The converters exhibit an input EMC-filter. 11.5 The boost converters are available in a fully enclosed 54.9 0.45 case or open-frame (option Z). 2.16 54.9 2.16 Features RoHS-compliant for all 6 substances 5 year warranty Wide input voltage range 16.8 to 160 VDC Output: 50 to 80 VDC Class III equipment (no isolation input/output) Extremely high efficiency Excellent surge and transient protection Externally adjustable output voltage Programmable undervoltage lockout and inhibit Interruption time with external capacitor EN 50155, 50121-3-2 observed Safety-approved to the latest edition of IEC/EN 62368-1 and UL/CSA 60950-1 Table of Contents Page Page Description............................................................................1 Electromagnetic Compatibility (EMC) ...................................7 Model Selection ....................................................................2 Immunity to Environmental Conditions .................................9 Mechanical Data .................................................................10 Functional Description ..........................................................2 Electrical Input Data .............................................................3 Safety and Installation Instructions .....................................10 Electrical Output Data...........................................................5 Options ...............................................................................11 Auxiliary Functions ...............................................................6 belfuse.com/power-solutions BCD.00197 Rev AG, 09-Mar-2021IBX15 Ser ies ers er t v Boost Con Model Selection Table 1: Model Selection 1 Input voltage Operating input range Output Voltage Output Current Efficiency Type designation Options V V V I i nom i o nom o nom min typ 24 V 16.8 - 160 VDC 50 - 160 VDC 1.6 A 89 % 93 % 24IBX15-50-0G Z 36 V 25.2 - 160 VDC 50 - 160 VDC 2.2 A 91 % 95 % 36IBX15-50-0G 1 Efficiency at V = V , V = V I = I i i min o o nom, o o nom Functional Description The IBX15 boost converter is designed as step-up converter in order to increase the input voltage V to the regulated boost voltage V . i oBr When V exceeds V , the output voltage follows V. The resulting voltage (see fig. 1) is within the range of V to V , which is i oB tr i oB tr i max suitable for adequate DC-DC converters, e.g. 110IMY15 or 110IMY70 for 24/36IBX15-50. The IBX15 converters have no input-to-output isolation isolation is provided by the DC-DC converters connected to the output. V o 150 125 100 V = 80 V oB tr 75 V = 50 V oB tr 50 25 V 0 i 25 50 75 100 125 150 Fig. 1 V versus V depending on V o i oB tr The inrush current is not limited, but the output capacitor of the IBX15 and the input capacitors of the connected DC-DC converters are relatively small. The switching frequency is approximately 2 200 kHz (inter leaved). A current limiting circuit protects the main FETs from overload. However, the output is not short-circuit proof. The logic is biased by an auxiliary converter with a switching frequency of approx. 350 kHz. The boost voltage V can be trimmed oB by resistor R to a higher level V . This allows together with an external storage capacitor C the realization of an interruption BA oB tr hu time as requested by the railway standard EN 50155. No other components are needed. JM081b 111 12 Vo+ Vi+ 2 Boost 11 control D Chu hu logic + Auxiliary C converter hu 350 kHz 15 Signal logic 3 D Gi 13 4 Go R R PUL BA 17 16 Fig. 2 PUL BA Functional diagram tech.support psbel.com belfuse.com/power-solutions BCD.00197 Rev AG, 09-Mar-2021 2021 Bel Power Solutions & Protection Page 2 of 11 PTC