Pulse width modulation load share bus

A power supply system, comprising:

• a plurality of power supply modules having respective power outputs coupled in parallel;
• each of the plurality of power supply modules having a controller for controlling the power output thereof;
• each one of the controllers is coupled to a load share bus (LSB), wherein
• each of the controllers monitors logic levels on the LSB,
• a one of the controllers asserts a load share signal on the LSB,
• when the asserted load share signal on the LSB is detected, the controllers start their respective load share timers and assert their load share signals on the LSB, and
• when the load share signal on the LSB is de-asserted the respective load share timers stop;
• wherein each one of the controllers determines from their respective load share timers a maximum percent power value being supplied by a one of the plurality of power supply modules;
• then each one of the controllers compares the maximum percent power value to the percent power value being supplied by a respective one of the plurality of power supply modules;
• when the maximum percent power value is greater than the percent power values supplied by respective ones of the plurality of power supply modules, then these respective ones of the plurality of power supply modules output powers are increased;
• and
• when the maximum percent power value is substantially the same as a percent power value supplied by a one of the plurality of power supply modules, then this respective one of the plurality of power supply modules output power is reduced.