DC/DC converter

The stage of a DC charger that turns its internal DC voltage into the voltage and current the car asks for, moment by moment.

Explained in

Charging hardware · Stop 02Where does AC become DC?Rectifier, DC/DC converter, contactors: the steps from grid current to battery current, why power is voltage times current, and the three charging modes of IEC 61851.

During charging, the car keeps asking for new values and the DC/DC converter follows. The battery decides, the charger delivers. How that shapes the power over a session is shown in the charging curve.

From “Why the charger asks before it switches”, stop 02

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  1. RectifierThe first stage of a DC charger, which turns the grid's alternating current into an intermediate direct voltage.
  2. Charging modeThe IEC 61851 classes of charging: Mode 2 from a socket with a control box in the cable, Mode 3 from a fixed AC charge point, Mode 4 from a DC charger.