The OP8666 incorporates a specially designed isolated Sync communication protocol to enable master-slave control and distributed control systems between multiple controllers.
In this protocol, the master controller can transmit reference signals to all the slave controllers (up to 10 slaves) at the same time, while the slave controllers can give feedback signals to the master controller one at a time.
This architecture enables the lowest latency in communication between the master controller and slave controllers, and it is especially suited for common power electronics applications such as parallel power supplies, multi-cell inverters and converters, etc.

Sync Communication Equivalent Circuit

Connections with Microcontroller