EG1186-24V/5A synchronous rectifier step-down

AC 24 is rectified to 32V through the full bridge and then stepped down to 24V/3A through synchronous rectification. The XL7015 step-down is used for the synchronous rectification drive power supply, which means that by modifying the input capacitor, the withstand voltage of tvs and esd can be used for 80V Synchronous rectification and voltage reduction. Mine is intended for the 24V power supply of a digital display soldering station. It is drawn as 10*10CM to facilitate everyone’s proofing. The current is initially estimated to be 5A if a heat sink is added. TVS and ESD diodes are added to the circuit. For overvoltage and electrostatic protection. The circuit consists of -32V input - EG1186 power supply (32V step-down to 18V) - EG1186 synchronous rectifier circuit_24V voltage output circuit.

IC power supply circuit, modified TVS, ESD, capacitor withstand voltage can be used in 80 synchronous rectification step-down     synchronous rectification drive circuit. This chip uses the hiccup principle. When the current reaches the set value, the power MOS tube is turned off, and the work starts over and over again. !   For the MOS tube power output stage, the IRF3607 used has a withstand voltage of 75V, so the safe input voltage is about 36V.

PCB blank board and board with soldered components

Test video link: http://v.youku.com/v_show/id_XNDM5NDAxMTIzNg==.html?x&sharefrom=android&sharekey=ea28c3906bc3b031e57f05c7f4eba1c98 The mos tube only has two tubes welded. If four tubes are used, the output current will be larger. It is used for welding The maximum power supply of the station is 5A, which is enough

There are process debugging files in the attachment.