7.4 Device Functional Modes
The UCC3895 has a number of operational modes. These modes are described in detail in Feature Description section.
- Current mode - The UCC3895 device may be operated in current mode control. The CS pin is connected to the current sense signal plus slope compensation. The RAMP pin is connected to the CS pin.
- Voltage mode - The UCC3895 may be operated in voltage mode control. The RAMP pin is connected to the signal at CT.
- Light load mode - Under light load conditions the signal at the EAOUT pin can fall below the threshold of the No-Load-Comparator. When this happens the UCC3895 maintains output regulation by skipping cycles.
- Synchronized mode - Multiple UC3895 devices may be synchronised to each other or to an external clock signal.
- Disable mode - The device will stop if the EN/DISB pin is pulled below 0.5 V.
- Soft-start mode - This mode protects the power stage from excessive stresses during the start-up process.