ZXGD3107N8TC Diodes Incorporated

ZXGD3107N8 SYNCHRONOUS MOSFET CONT ROLLER IN SO-8 Description Features ZXGD3107N8 synchronous controller is designed for driving a Proportional Gate Drive to Minimize Body Diode Conduction MOSFET as an ideal rectifier. This is to replace a diode for increasing Low Standby Power with Quiescent Supply Current < 1mA the power transfer efficiency. 4.5V Operation Enables Low Voltage Supply 40V V Rating CC Proportional Gate drive control monitors the reverse voltage of the 200V Drain Voltage Rating MOSFET such that if body diode conduction occurs, a positive voltage Operation up to 500kHz is applied to the MOSFETs GATE pin. Once the positive voltage is Critical Conduction Mode (CrCM) & Continuous Mode (CCM) applied to the Gate, the MOSFET switches on allowing reverse Compliant with Eco-Design Directive current flow. The controllers output voltage is then proportional to the Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) MOSFET drain-source voltage and this is applied to the Gate via the Halogen and Antimony free. Green Device (Note 3) driver. This action minimizes body diode conduction while enabling a rapid MOSFET turn-off as drain current decays to zero. Applications Mechanical Data Flyback Converters in: Case: SO-8 Case Material: Molded Plastic. Green Molding Compound. UL AC-DC Adaptors Flammability Rating 94V-0 Set-Top Boxes Moisture Sensitivity: Level 1 per J-STD-020 PoE Power Devices Terminals: Matte Tin Finish. Solderable per MIL-STD-202, Resonant Converters in: Method 208 Telecoms PSU Weight: 0.074 grams (Approximate) Laptop Adaptors Computing Power Supplies ATX and Server PSU Typical Configuration Transformer Vout SO-8 RREF RBIAS Pin Name Pin Function V CC GATE REF BIAS Vcc Power Supply V CC DNC GND DNC Do Not Connect C1 ZXGD3107 BIAS Bias Current DRAIN GATE GND BIAS DNC DRAIN Drain Sense V G REF Reference Current DRAIN REF GND Power Ground GND GATE Gate Drive V D Top View Top View Synchronous Rectifier Pin-Out MOSFET Ordering Information (Note 4) Product Marking Reel Size (inches) Tape Width (mm) Quantity Per Reel ZXGD3107N8TC ZXGD3107 13 12 2,500 Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See ZXGD3107N8 Functional Block Diagram Vcc ZXGD3107N8 ZXGD3107 Gate drive + amplitude control Diff amp - Turn-on/off + DRAIN control Hi volt Driver GATE comparator - Threshold voltage control REF BIAS GND Pin Number Pin Name Pin Function and Description Power supply 1 V CC This supply pin should be closely decoupled to ground with a ceramic capacitor. Do not connect 2, 6 DNC Leave pin floating. Bias 3 BIAS Connect this pin to V via R resistor. Select R to source 0.56mA into this pin. CC BIAS BIAS Refer to Table 1 and 2, in Application Information section. Drain sense 4 DRAIN Connect directly to the synchronous MOSFET drain terminal. Reference Connect this pin to V via R resistor. Select R to source 1.23mA into this pin. 5 REF CC REF REF Refer to Table 1 and 2, in Application Information section. Ground 7 GND Connect this pin to the synchronous MOSFET source terminal and ground reference point. Gate drive 8 GATE This pin sinks and sources the I and I current to the synchronous MOSFET Gate. SINK SOURCE 2 of 14 ZXGD3107N8 April 2017 Diodes Incorporated www.diodes.com Document number: DS37887 Rev. 2 - 2