UCD3138的均流以及oring电路

请教一个问题，我想了解一下UCD3138的均流原理？还有就是oring电路的的作用，在这个芯片的 应用中是否必须？

Oring是防止电流灌的

我认为应该是必须的。但是对于oring电路不太了解

有oring fet,noting diode 防反灌

有  oring diode ,noting fet.

UCD31xx based EVM and reference designs support three major current sharing techniques. 

• Current sharing using an average current bus
• Current sharing in Master/Slave mode
• Current sharing in droop mode

for Current sharing using average current bus

This technique relies on the voltage on the shared bus to be proportional to the average current supplied by all the power supplies in the system.

Each power supply provides an output signal that is proportional to the current that it drives at its output.

All above mentioned output signals have the same output impedance and all connect to the same current sharing bus.

Therefore the voltage at the bus will be the average voltage of all these signals. 

 Each power supply is attempting to adjust its output current in order to match its output current with the average current output of all the power supplies.

 The output current of each power supply and the average current of all power supplies are both measured by ADC. Then through a current sharing algorithm the value of the output voltage is slightly changed in order to make the output current match the average current.

 Since the level of the regulated output voltage is dictated by the EADC’s DAC value, the firmware will feed (change) this value periodically in order to keep matching the average current.