The SY21401 is a current mode DC/DC controller targeted for Boost, SEPIC, Flyback and Forward applications. The SY21401 has an accurate DC input current limit. External compensation provides flexible adjustment of control loops for different applications. The internal low side driver is capable of sourcing 1.5A and sinking 3A current.

ZVS Flyback SR Controller

High Efficiency 300kHz, 25V Boost/SEPIC Controller with Output Current Limit

Low-Power Digital Temperature Sensor with SMBus and Two-Wire Serial Interface

3 to 6 Series Cell Battery Monitor, Balance, Protection for Li-ion and Phosphate Application

5.5V Input, 2A Single Synchronous Buck Converter

EMI Filter Array and ESD Protection

EMI Filter Array and ESD Protection

36V, Boost/Flyback/Sepic Controller

Multi Cell Battery Gas Gauge IC