Circuit/System Description

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