Product Description:

The FT839Nxx controller device is optimized for high-performance, low power switching mode power supply applications. The FT839Nxx facilitates CC/CV charger design by eliminating an opto-coupler and TL431. Its highly integrated functions such as Under Voltage Lockout (UVLO), Leading Edge Blanking (LEB) and built-in cable compensation offer the users a high efficiency and low cost solution for AC/DC power applications.  

Power supplies built with FT839Nxx can achieve both highest average efficiency， fast dynamic load response and super low standby power. FT839Nxx satisfy DoE Level 6 requirements with production margin from 5V/1A to 5V/2.4A applications, respectively.

Furthermore, FT839Nxx features fruitful protections like Open Circuit Protection and Over Temperature Protection to eliminate the external protection circuits and provide reliable operations. FT839Nxx is available in SOP8/DIP8 package. 

Product features:

• Constant-Current (CC) and Constant-Voltage (CV) with Primary Side Control

• Proprietary technology enabling high efficiency and fast dynamic response

• Satisfy DoE Level 6 requirements from 5V/1A to 5V/2.4A applications

• No audible noise over entire operating range

• Optimization for capacitive loading

• Built-in power NPN/MOS

• Built-in Cable Compensation

• Built-in Line Compensation

• Primary-side feedback eliminates opto-coupler and TL431

• Cycle-by-Cycle Current Limiting

• Over Temperature Protection

• VCC Over Voltage Protection

• CV Open-loop Protection

• Excellent capacitive loading start-up performance