SF7201 SIFIRST | Alldatasheet
Document overview
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Technical content
©SiFirst Technology - 1 - Confidential SiFirst_DS_7201_V1.1 SF7201
FEATURES
◆ Built-in 50V Ultra-low on-state Resistance SR MOSFET(15mΩ,VDD=5V) ◆ Synchronous Rectification Power Switch ◆ Suited for Low -Side of Flyb ack Converters in QR and DCM Operation ◆ Programable Green Mode Control for Energy Saving at Light Load ◆ <1mA Quiescent Current for Energy Saving
APPLICATIONS
Offline AC/DC Flyback Converter for ◆ AC/DC Adaptors ◆ Open-frame SMPS GENERAL DESCRIPTION SF7201 is a secondary -side Synchronous Rectification (SR) power switch. It built in a 50V ultra low on state resistance(typical 15mΩ，VDD=5V) SR MOSFET for improving efficiency in Discon tinuous Conduction Mode( DCM) and Quasi -Resonant(QR) flyback converters SF7201 integrates functions and protections of Under Voltage Lockout(UVLO),VDD Clamper ,etc. SF7201 is available in SOP-8 package. TYPICAL APPLICATION GREEN VDD NC VDET GND SF7201 Vout=5V GND DRAIN DRAIN CoutAC IN FB VDD GND Drain Drain SF6773V CS CC Super- SRTM Synchronous Rectifier Power Switch
©SiFirst Technology - 2 - Confidential SiFirst_DS_7201_V1.1 SF7201 Pin Configuration GREEN VDD NC VDET GND SF7201 GND DRAIN DRAIN
Ordering Information
Part Number Top Mark Package Tape & Reel SF7201SG SF7201SG SOP8 Green Yes Marking Information SF7201SG Y WW YWW: Year&Week code Pin Description Pin Num Pin Name I/O Description 1 NC 2 VDET I Winding detection. This pin is used to detect the voltage on the winding and calculate the area of the winding signal during the on time period of the primary GATE.
3 GREEN I Program a voltage reference with a resistor form GREEN to GND, to
enable synchronous rectification MOSFET drive signal 4 VDD P IC power supply pin. 5,6 GND P IC ground pin and source of Built-in Power MOSFET 7,8 DRAIN I Drain of Built-in Power MOSFET