SY7901 High Efficiency 500kHz 25V PWM Controller

SY7901 High Efficiency 500kHz 25V PWM Controller

The SY7901 is a current mode DC/DC controller targeted for Boost, Sepic, Flyback and Forward applications. The SY7901 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. Ordering Information SY79.

Features

• Input Voltage Range 3V to 25V
• 500kHz Fixed Switching Frequency
• An Accurate DC Input Current Limit
• External Compensation
• Internal Soft-start Limits the Inrush Current
• Integrated Low Side Driver: 1.5A Sourcing and 3A Sinking
• RoHS Compliant and Halogen Free
• Compact Package: DFN3×3-10 Applications
• GPS Navigation Systems
• Handheld Devices
• Portable Media Player Typical Applications VIN CIN COMP R4 C4 CSS SS ON/OFF EN FB GND C1 IN L C2 VCC VOUT GATE RG CS R3 ISEN C3 CD M R1 Co R2 RS Figure1. Schematic Diagram SY7901 Rev. 0.9C © 2020 Silergy Corp. Silergy Cor.