Overview
The TC6520 is a high-performance offline primary feedback control IC designed for low-power chargers and adapters, eliminating the need for optocouplers and 431s.
In CC control, the current and output power can be adjusted by the resistance of the CS pin of the chip. In CV control, the PFM control method is used to obtain the high performance and efficiency. In addition, better load regulation can be achieved through IC built-in compensation. The power consumption of the IC itself is very small (only 300uA flows through the current), the system power consumption can be lower than 30mw, so it can pass strict standards.
TC6520 itself has comprehensive protection functions, such as current limiting, VDD overvoltage protection, open circuit protection, short circuit protection, built-in leading edge blanking, and undervoltage lockout Fixed function.
TC6520 is available in SOT23-6 package.

FEATUREs
➢ Full voltage range CV accuracy remains within ±5%
➢ High-precision constant current regulation in the full voltage range
➢ The primary side feedback technology can save the system TL431 and optocoupler
➢ Programmable CV, CC adjustment
➢ Built-in winding inductance compensation
➢ Programmable output line voltage drop compensation
➢ Drive BJT switch
➢ Ultra-low startup current (typical value: 1uA) programmable input high and low voltage compensation
➢ VDD output overvoltage protection
➢ Built-in feedback open-loop protection
➢ Built-in short circuit protection (SCP)
➢ Built-in leading edge blanking circuit (LEB)
➢ Cycle-by-cycle overcurrent protection
➢ Under-voltage protection (UVLO)
➢ Adopt SOT23-6 package, RoHS compliant

APPLICATIONs
➢ CC/CV battery charger
   ● Cell Phone/Cordless Phone Charger
   ● Digital camera charger
   ● PDA charger
➢ Low power power adapter
➢ Computer/TV auxiliary power supply
➢ Linear Power Replacement