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Reference Designs

SAE J1772-compliant electric vehicle service equipment reference design for level 1 and 2 EV charger

Texas Instruments

This reference design highlights an ultra-low standby isolated AC/DC auxiliary power stage followed by converters and linear regulators: a comparator-based control pilot interface to meet the SAE J1772 standard: an efficient relay and contactor drive and isolated line voltage sensing across the relay and contactor. Electric vehicle service equipment (EVSE) facilitates power delivery to electric vehicles safely from the grid. An EVSE control system consists of an auxiliary power stage: an off-board AC/DC high power stage (only in DC charging stations): energy metering unit: AC and DC residual current detector: an isolation monitor unit: relays and contactors with drive: two-way communication over single wire: service and user interfaces.

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Features

Ultra-low standby UCC28740-based isolated AC/DC stage to achieve ENERGY STAR® certification for EV charging stationsTight output voltage regulation (Ultra-low standby as well as cost-optimized converters and linear regulators to power up points-of-loadDRV110 current controller to drive high-current relays and contactors for thermal protection and reducing power dissipationIsolated line voltage sensing using the ISO1212 digital-input receiver for welded relay and contactor detection