Power chip

8-Pin Continuous Conduction Mode (CCM) PFC Controller 8-PDIP -40 to 125

The FAN3989 is a USB connection monitoring device used to determine whether a standard USB device or a charging device is connected. The FAN3989 sets the FLAG1 pin to a logic high or low level as an indication to the USB port of the system controller whether a standard USB device or a charger is attached. FAN3989 also monitors VBUS for overvoltage or undervoltage conditions. If VBUS is less than 3.3V or greater than 6.0V, the FLAG2 pin is set low. If VBUS is less than 3.3V or greater than 6.0V, the internal load switch control pin is set high, turning off the PMOS switch. The FAN3989 features a very small 8-lead MLP encapsulation for applications where board space is limited, such as mobile phones.