•Description ：U6116 is a high performance Primary Side Regulation (PSR) controller with high precision CV/CC control ideal for charger applications. The IC can also support Quasi-Resonant(QR) Buck constant current topology for LED lighting if SEL pin is short to GND.In CV mode, U6116 adopts Multi Mode Control which uses the hybrid of AM (Amplitude Modulation) mode and dynamic response.The built-in Cable Drop Compensation (CDC) function can provide excellent CV performance.U6116 integrates functions and protections of Under (Frequency Modulation) FM mode to improve system efficiency and reliability.ln CC mode.the IC uses PFM control with line and load CC compensation.The IC can achieve audio noise free operation and optimized Voltage Lockout (UVLO), VDD over Voltage Protection (VDD OVP),Cycle-by-cycle Current Limiting (OCP), Short Load Protection (SLP), Gate Clamping,and VDD Clamping.

•Key features:Support Flyback and Buck Topology:Flyback PSR Control (SEL= Floating),QR-Buck CC Control (SEL= GND).Multi Mode PSR Control；
Audio Noise Free Operation for PSR；Optimized Dynamic Response for PSR；Low Standby Power {<}70mW；
+4% CC and CV Regulation；Programmable Cable Drop
Compensation:(CDc)in PSR CV Mode；Built-in AC Line & LoadCC Compensation；Build in Protections:
Short Load Protection (SLP)；On-Chip Thermal Shutdown (OTP)；
Cycle-by-Cycle Current Limiting；Leading Edge Blanking (LEB)；
Pin Floating Protection.VDD UVLO OVP & Clamp；Package (SOT23-6)；

•Typical applications:BatteryChargers for CellularPhones；AC/DC Power Adapter；LED Drivers

•Typical application circuit: 

Download the specification here