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双极性晶体管

二极管

ESD保护、TVS、滤波和信号调节ESD保护

MOSFET

氮化镓场效应晶体管(GaN FET)

绝缘栅双极晶体管(IGBTs)

模拟和逻辑IC

汽车应用认证产品(AEC-Q100/Q101)

On-Board Charger (OBC)

Whether a car is a battery electric vehicle (BEV) or plug-in hybrid electric vehicle (PHEV), one critical component is the on-board charger (OBC). This enables the charging of the high-voltage DC battery packs from various electric vehicle service equipment (EVSE) or charging stations. Those range from single-phase Level 1 residential chargers (~3 kW) to multi-phase Level 2 commercial capable of providing up to 22 kW, supporting both 400 and 800 V batteries. Of course Level 3 fast chargers provide a DC voltage direct to the battery, bypassing the OBC. However, a small highly efficient form factor is required to give manufactures the flexibility to place the OBC in different locationss in various models.

  • 框图
  • Design considerations
  • Product listing
  • 支持

框图

Controllogic AC inputfrom EVSE BatteryManagementSystems (BMS) Microcontroller/Datalogger/Comms Gate drivers CAN/I-FD 400 VDC Bus 280 V - 420 V DC aaa-033744 GaNFET GaNFET Highlighted components are Nexperia focus products.

PFC boost

Primary side conversion

Secondary side conversion

ESD protection

Control logic

AC EV wallbox

Battery Management System

选择元件

想要查看本应用中,所使用的 Nexperia 元件的更多信息,请选择上面的元件或单击框图中的元件(蓝色突出显示的部分)。

Design considerations

  • Designers have multiple options for OBC conversion topologies, including single-phase / multi-phase and uni- / bidirectional 
  • Current batteries are typically 400 V, using 650 V FETs in a bidirectional OBC topology where GaN brings the highest efficiencies (for unidirectional topologies SiC diodes can be used on the secondary side
  • For 800 V batteries, need to go multi-level GaN or high-voltage SiC
  • However OBC topologies are heavily fragmented which may lead to combined 650 / 1200 V device solutions
  • PFC output defines blocking voltage of power semiconductors at DC-DC-Input and battery voltage defines blocking voltage at DC-DC-Output (650 or 1200 V)  
  • Trend towards higher OBC charging power and 800 V batteries for higher class BEV solutions, will require more 1200 V solutions

Product listing

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