Onboard charger

Products and reference designs

Onboard charger

Block diagram

Overview

Our integrated circuits and reference designs provide you with efficient, high-performance onboard charger solutions allowing you to keep up with shifting industry trends.

Design requirements

Onboard charger systems require:

  • High performance and fast digital control loops enabling highly efficient power conversion and increased power density.
  • Enabling precise control and fast shut down in an overcurrent scenario by high bandwidth and fast response current sensing.
  • Safely and efficiently controlling and protecting the power switch (IGBT/SiC).

Block diagram

Find products and reference designs for your system.

Onboard charger

AC power from grid AC power from grid Controlled DC to HV battery Controlled DC to HV battery DC/DC primary power stage DC/DC primarypower stage DC/DC secondary power stage DC/DC secondarypower stage PFC temperature sense PFC temperature sense Analog/digital temperature sensors Analog/digital temperature sensors DC/DC primary gate driver DC/DC primary gate driver Isolated gate driver Isolated gate driver Primary temperature sense Primary temperature sense Temperature sensor Temperature sensor Secondary temperature sense Secondary temperature sense Temperature sensor Temperature sensor DC/DC secondary gate driver DC/DC secondary gate driver Half bridge / isolated gate driver Half bridge / isolated gate driver Secondary voltage sense Secondary voltage sense Amplifier Amplifier Secondary current sense Secondarycurrent sense Amplifier / hall sensor Amplifier / hall sensor DC/DC controller DC/DC controller MCU MCU PFC bias supply PFC bias supply Isolated DC/DC supply Isolated DC/DC supply PFC current sense PFC current sense Isolated amplifier Isolated amplifier Voltage sense Voltage sense PFC controller PFC controller MCU MCU PFC power stage PFC power stage Current sense Current sense Temp sense Temp sense Voltage sense Voltage sense Current sense Current sense Temp sense Temp sense Primary voltage sense Primary voltage sense Isolated amplifier Isolated amplifier PFC power supply PFC power supply Buck / LDO Buck / LDO Secondary power supply Secondary power supply Buck / LDO Buck / LDO 12V Supply 12V Supply HEV CAN HEV CAN Connector control & diagnostics Connector control & diagnostics Motor driver Motor driver Temp sensor Temp sensor Connector handshake Connector handshake EVSE communication EVSE communication CAN CAN PLC PLC Wireless Wireless Thermal management Thermal management Valve control/ motor control Valve control/motor control HEV/EV safety HEV/EV safety Interlock/ isolation leakage Interlock/isolation leakage SBC SBC DC/DC PMIC DC/DCPMIC Charger Interface Charger Interface PFC PFC DC/DC DC/DC OBC CAN OBC CAN CAN CAN Input protection Input protection Reverse/ transient protection Reverse/ transient protection Contactor control Contactor control High side switches low side switches High side switcheslow side switches OBC controller OBC controller Microcontroller Microcontroller Shunt / magnetic Shunt / magnetic Shunt / magnetic Shunt / magnetic Primary current sense Primary current sense Amplifier / hall sensor Amplifier / hall sensor PFC voltage sense PFC voltage sense Amplifier Amplifier PFC gate driver PFC gate driver Isolated gate driver Isolated gate driver MCU monitoring & diagnosis MCU monitoring & diagnosis Voltage supervisor & watchdog Voltage supervisor & watchdog PFC to DC/DC communication PFC to DC/DC communication Digital isolator / input/output communication Digital isolator / input/output communication PFC communication PFC communication Digital isolator Digital isolator Primary bias supplies Primary bias supplies Isolated DC-DC supply Isolated DC-DC supply DC/DC communication DC/DC communication Communication /diagnostics Communication /diagnostics Secondary bias supply Secondary bias supply Isolated DC/DC supply Isolated DC/DC supply Indicators Indicators LED driver LED driver AC/DC EMI filter AC/DC EMI filter EMI filter EMI filter

Technical documentation

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Type Title Date
White paper Isolated Bias Power Supply Architecture for HEV and EV Onboard Chargers PDF | HTML 26 Nov 2024

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