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Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.FAN6248 Advanced Synchronous Rectifier Controller for LLC Resonant Converter The FAN6248 is an advanced synchronous rectifier (SR) controller that is optimized for LLC resonant converter topology with minimum external components. It has two driver stages for driving the SR MOSFETs which are rectifying the outputs of the secondary transformer windings. The two www.onsemi.com gate driver stages have their own sensing inputs and operate PACKAGE PICTURE independently of each other. The adaptive parasitic inductance compensation function minimizes the body diode conduction maximizing SOIC-8 NB the efficiency. The advanced control algorithm allows stable SR CASE 751 operation over entire load range. FAN6248 has two different versions - . FAN6248HAMX having higher turn-off threshold voltage and FAN6248HBMX having lower turn-off threshold voltage. Features MARKING DIAGRAM Highly integrated self-contained control of synchronous rectifier with a minimum external component count Optimized for LLC resonant converter Anti shoot-through control for reliable SR operation U = Frequency, H:High Separate 100V rated sense inputs for sensing the drain and source V = Vth off level, A or B voltage of each SR MOSFET Z = Assembly Plant Code Adaptive parasitic inductance compensation to minimize the body X = Year Code diode conduction Y = Two Week Code SR current inversion detection under light load condition TT = Die Run Code Light load detection PIN CONNECTIONS Adaptive minimum on time for noise immunity Operating voltage range up to 30 V GATE1 1 8 GATE2 Low start-up and stand-by current consumption GND 2 7 VDD Operating frequency range from 25kHz up to 700 kHz TBD Top Mark VD1 3 6 VD2 SOIC8 Package High driver output voltage of 10.5 V to drive all MOSFET brands to VS1 4 5 VS2 the lowest R DS ON (Top View) Low operating current in green mode (typ. 350uA) Applications ORDERING INFORMATION High power density laptop adapter See detailed ordering and shipping information on page 3 of this data sheet. High Power Density Adapter Large Screen LCD-TV, PDP-TV, RP-TV Power High-Efficiency Desktop and Server Power Supplies Networking and Telecom Power Supplies High Power LED Lighting Semiconductor Components Industries, LLC, 2017 1 Publication Order Number: April 2017- Rev.1.0 FAN6248