Power management unit for intelligent traffic system applications

A traffic light power management system, the system comprising:

• a first input configured to receive AC power;
• a first output;
• a power management unit, removably coupled to a service bypass unit;
• a backup power source coupled to the power management unit;
• the service bypass unit, configured to:
• receive the AC power from the first input,
• convert the AC power to a first DC power in a first mode of operation,
• provide the first DC power to the first output in the first mode of operation, and
• provide the AC power to the power management unit in a second mode of operation, and
• the power management unit, configured to:
• receive, from the service bypass unit, the AC power in the second mode of operation,
• convert, by the power management unit, the AC power to a second DC power in the second mode of operation, and
• provide, by the power management unit, the second DC power to the first output in the second mode of operation.

A traffic light power management system, the system comprising:

• a first input configured to receive AC power;
• a first output;
• a power management unit;
• a backup power source coupled to the power management unit;
• and
• means for providing, in a first mode of operation, a first DC power derived from the AC power received at the first input to the first output bypass the power management unit, providing, by the power management unit in a second mode of operation, a second DC power to the first output, the second DC power provided by the power management unit and derived from the AC power received at the first AC input, and providing, by the power management unit in a backup mode of operation, a third DC power derived from power received from the backup power source to the first output.