xEV (HV/LV DC-DC)

There are various loads such as electric power steering, fans, body control module and lift gate or window that cannot directly operate from the high voltage battery of the PHEV(Plug-in hybrid electric vehicles) and battery electric vehicles(BEV). HV/LV DC-DC block convert to high voltage battery(400~800V) to the low voltage battery(12/48V). The requirements are similar to DC-DC stage of on-bard charger(OBC).

There are requirements to integrate OBC and HV/LV DC-DC for weight and size optimization and cost reduction.

Typical HV/LV DC-DC power rating is 1.5kW~4kW for various loads in EV.

Topology Trend

ZVS PSFB → LLC resonant converter

HV/LV DC-DC SYSTEM BLOCK
Output Power 1.5kW ~ 4kW
Input / Output Voltage 400~800VDC / 12~48VDC
Switching Freq. DC-DC : > 100kHz
System Requirement

High System Efficiency

Power limited (4kW) by cost / size

High Power Density (Small form factor)

Coverage wide input/output range battery voltage (800V ↔12V/48V)

Device Solution

System Block Topology Product Category PMS Solution
DC-DC
(Primary)
ZVS PSFB or LLC 600/650V SJ MOSFETs (400V Batt.) 600/650V e MOS
650V SiC MOSFETs (400V Batt.)
1200V SiC MOSFETs (800V Batt.)
650V e SiC MOSFET
1200V e SiC MOSFET
DC-DC (Secondary) Synchronous Rectification 60~150V MV MOSFETs 60~150V e MOS
DEVICE SOLUTION FOR HV/LV DC-DC ( 400V~800V Battery )
LLC (Primary) for 400VDC - Recommended Products
e SiC MOSFET *PCZ65N27M1-A
*PCZ65N48M1-A
*PCBF65N27M1-A
*PCBF65N48M1-A
650V / 27mΩ, TO-247-4L
650V / 48mΩ, TO-247-4L
650V / 27mΩ, D2PAK-7L
650V / 48mΩ, D2PAK-7L
e MOSF7 *PMW60N030F7-A
*PMW60N043F7-A
*PMW65N043F7-A
*PMW60N075F7-A
600V / 30mΩ, TO-247
600V / 43mΩ, TO-247
650V / 43mΩ, TO-247
600V / 75mΩ, TO-247
LLC (Primary) for 800VDC - Recommended Products
e SiC MOSFET *PCZ120N21M1-A
*PCZ120N30M1-A
*PCZ120N40M1-A
*PCZ120N60M1-A
*PCZ120N80M1-A
*PCBF120N21M1-A
*PCBF120N30M1-A
*PCBF120N40M1-A
*PCBF120N60M1-A
*PCBF120N80M1-A
1200V / 21mΩ, TO-247-4L
1200V / 30mΩ, TO-247-4L
1200V / 40mΩ, TO-247-4L
1200V / 60mΩ, TO-247-4L
1200V / 80mΩ, TO-247-4L
1200V / 21mΩ, D2PAK-7L
1200V / 30mΩ, D2PAK-7L
1200V / 40mΩ, D2PAK-7L
1200V / 60mΩ, D2PAK-7L
1200V / 80mΩ, D2PAK-7L
LLC (Secondary) - Recommended Products
60V e MOS(for 12VDC) *PSS06N1P2(L)G1-A
*PSS06N1P8LG1-A
*PSS06N2P5LG1-A
60V / 1.2mΩ, PQFN56
60V / 1.8mΩ, PQFN56
60V / 2.5mΩ, PQFN56
150V e MOS(for 48VDC) *PSS15N7P5G1-A
*PSS15N8P8G1-A
*PSS15N11G1-A
150V / 7.5mΩ, PQFN56
150V / 8.8mΩ, PQFN56
150V / 11mΩ, PQFN56
* Comming soon