BC3.5LFB1.4 BC3.5LFB1.4LLC Full-Bridge 1.4:1 Transformer 3.5kW 70-200kHz 

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BC3.5LFB1.4LLC Full-Bridge 1.4:1 Transformer 3.5kW 70-200kHz

Features 

•LLC resonant 3.5 kW full-bridge transformer
•Works with Lr = 22µH and Cr = 33nF
•Frequency range 70-200kHz
•Reinforced insulation between prim/sec and with core
•UL94 and RoHS materials (F/155°C)
•Design based on AEC-Q200
•Weight : approx 350grams

   

Application 

•Automotive EV/PHV AC/DC onboard battery chargers

Operation 

•Vin = 220-420Vdc / Vout = 200-430Vdc
•Ip = 19Arms MAX / Is = 18.5Arms MAX
•Operating temperature -40/+140°C with cooling (potting)
    

 L1 = LP    (100kHz/1Vac)

R1 

R2

N1:N2

L1lk         (100kHz/1Vac, N2 shorted)

{N1}/{N2}/{CORE}

BC3.5LFB1.4

130µH ±7.5%

17mΩ TYP  (19mΩ MAX)

13mΩ TYP  (15mΩ MAX)

1.4:1

2µH MAX

4kVAc/50Hz/5mA/1min*

(*) 1min in qualification / 2sec in mass production

BC3.5LFB1.4 dimensions

BC3.5LFB1.4 electrical diagram

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