SP6878

SP6878 Quasi-Resonant PWM Controller DESCRIPTION The SP6878 is a low cost, quasi-resonant flyback controller where the maximum frequency is below 100KHz. The internal valley detector ensures the converter operates at quasi-resonant operation over wide range of line voltage. The build-in advanced energy saving function would provide the users a superior AC/DC power application of higher efficiency, low external component counts, and lower cost solution for applications. The SP6878 features more protections or functions for the following characteristics: over voltage protection (OVP); over temperature protection (OTP); over load protection (OLP). SP6878 is available by SOP-8/ DIP-8P packages. APPLICATIONS  AC/DC Switching Power Adaptor  Set-top Box Power Supply  Open-Frame Switching Power Supply FEATURES  High-Voltage BCD Process  Under Voltage Lockout (UVLO )  Quasi-Resonant Control  Internal 4ms Soft Start  Over Temperature Latch Shutdown  OLP (Over Load Protection)  OVP (Over Voltage Protection) on Vcc Pin  100KHz Maximum Frequency  800mA Driving Capability PIN CONFIGURATION SOP-8 PART MARKING SOP-8 2020/07/07 Ver 4 Page 1 SP6878 Quasi-Resonant PWM Controller TYPICAL APPLCATION CIRCUIT FOR HIGH EFFICIENCY SMPS PIN DESCRIPTION Pin Symbol Description 1 FR Set the internal frequency and timer. 2 FB Voltage feedback. It provides feedback to the internal PWM comparator to control the duty cycle. 3 CS Current sense. 4 GND Ground 5 GATE Gate driver...