BCT SERIES
Automotive EV/HEV Isolated 3.3kW Battery Charger Transformer
Planar Transformers
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 recti cation
- 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 exible cables protected under sleeve
- Connecting M4 or M5 terminals on demand
- Center-tap secondary side on demand
- Customized case on demand
Electrical speci cations
Code
BCT-001
BCT-002
BCT-003
MAX
Output
Power
(kW)
3.3
3.3
3.3
DC-Link
Input
Voltage
(Vdc)
390-410
360-400
375-430
Output
Voltage
(Vdc)
250-430
260-410
275-450
MAX
Output
Current
(Adc)
12
13
12
Switch.
Freq.
(kHz)
100
Topology
Turn
Ratio
(Pri:Sec)
Magneti-
zing
Induct.
1mH
MIN
1.7mH
MIN
50μH
+/-5%
MAX
Leakage
Induct.
2μH
3μH
2μH
Full-Bridge
13:18
ZVS*
Full-Bridge
65
17:21+21
ZVS*
Half-Bridge
13:22
90-200
LLC**
(*) 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
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