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 (360V) direct current (DC) and low voltage (14V) DC to charge the 12V battery and to operate the power accessories. The ECM controls the 14V power module by supplying 5V pulse width modulated (PWM) signal through a control circuit. The 14V power module sends 5V PWM feedback signal to the ECM through the feedback circuit. The 14V power module generates more power as the commanded duty cycle increases.