Circuit/System Description

The 14V power module, often referred to as the accessory DC power control module, supplies the energy that flows between the high voltage (300V) direct current (DC) and low voltage (14V) DC to charge the 12V battery and power accessories. The 14V power module receives a wake-up signal on a discrete line from the hybrid/EV powertrain controller 2 when the vehicle is On. After a successful initialization, the 14V power module receives an enable command from the hybrid/EV powertrain control module over the serial data circuits to begin power conversion.