BCT SERIES Planar Transformers Automotive EV/HEV Isolated 3.3kW Battery Charger Transformer Features - Design for high performance 3.3kW on-board battery chargers - Cubic format for higher power density - Working frequency from 65 to 200kHz - Reinforced 3kV isolation between primary and secondary - Primary to secondary creepage distance > 8mm - High operating temperature range -40 to +125°C - UL94V-0 and RoHS material - Design compliant with AEC-Q200 requirements - No thermal aging effect - Weight : approx. 0.4kg Application - Power stage after 400V PFC rectification - Automotive EV/HEV AC/DC on-board battery chargers - Half- or full-brigde ZVS or LLC resonant topologies - Industrial high-power SMPS Dimensions (mm) Electrical Diagram Notes - Mounting onto cold-plate heatsink by 4x M4 screws - Output by flexible cables protected under sleeve - Connecting M4 or M5 terminals on demand - Center-tap secondary side on demand - Customized case on demand Electrical specifications MAX Output Power (kW) DC-Link Input Voltage (Vdc) Output Voltage (Vdc) MAX Output Current (Adc) BCT-001 3.3 390-410 250-430 12 BCT-002 3.3 360-400 260-410 13 BCT-003 3.3 375-430 275-450 12 Code Switch. Freq. (kHz) Topology Turn Ratio (Pri:Sec) Full-Bridge 13:18 ZVS* Full-Bridge 65 17:21+21 ZVS* Half-Bridge 13:22 90-200 LLC** 100 Magnetizing Induct. 1mH MIN 1.7mH MIN 50μH +/-5% MAX Leakage Induct. 2μH 3μH 2μH (*) A 4 to 6μH resonant inductor in series with the transformer primary winding is recommended for soft switching operation (**) Resonant tank made of Lr = 12.5μH and Cr = 120nF in series Notes (4) The Pri/Sec creepage distance is guaranteed > 8mm (1) All test data are referenced to 25°C ambient temperature (5) The component must be properly cooled down by (2) The inductance values are measured at 100kHz/1Vac mounting onto a water-plate heatsink at +85°C MAX (3) The isolation is 100% tested at 3kVac/50Hz/2sec/3mA (6) Other winding arrangements available on demand 166