{681} Synchronous Rectifier Controller TEA1761T

in this video number {681} Synchronous Rectifier Controller TEA1761T, i explained active rectifier controller / synchronous rectifier controller ic. it is used in most of effective power supplies. these power supplies don't have rectifier diodes in secondary side, it uses MOSFET instead of rectifier diodes. The TEA1761T is a controller IC dedicated for synchronous rectification on the secondary side of discontinuous conduction mode and quasi resonant flyback converters. Besides electronics for synchronous rectification, it also has integrated circuitry for output voltage and output current regulation. The TEA1761T is the controller for synchronous rectification to be used in discontinuous conduction mode and quasi resonant flyback converters. Besides controlling the SR MOSFET, the TEA1761T contains the voltage reference and amplifiers to regulate and control the output voltage and current of the power supply. A switched mode power supply with the TEA1761T consists of a primary side discontinuous conduction mode flyback controller, a transformer, and an output stage with a feedback circuit. In the output stage a MOSFET (Qsec) is used for low conduction losses. The MOSFET is controlled by the TEA1761T. The output voltage and/or current is also controlled by the TEA1761T via the opto coupler connection to the primary side. The output voltage is set by resistors Rfb1 and Rfb2. The output current is controlled by the resistor Risense. The timing for the synchronous rectifier switch is derived from the voltage sensed on the SRSENSE pin. The resistor in the SRSENSE connection is needed to protect the TEA1761T from excessive voltages. The SRSENSE resistor should typically be 1 kW. Higher values might impair correct timing, lower values may not provide sufficient protection. You are Invited to Join Haseeb Electronics https://www.youtube.com/channel/UCamuZ8n1PwdZpzxV32b1l_w/join #Synchronous #Rectifier #Controller