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2 FN9077.6 December 29, 2004 Application Block Diagram Functional Block Diagram SECONDARY CIRCUIT +48V CONTROLLER PWM LI HI HO LO VDD HS HB +12V VSS ISL6700 REFERENCE AND ISOLATION DRIVE LO DRIVE HI LEVEL SHIFT HB HS HO LO UNDERVOLTAGE DETECTOR LI HI VDD VSS U/V TURN-ON DELAY EPAD (QFN PACKAGE ONLY) ISL6700 |