CONTROLLER FOR DC-DC CONVERTER
|Numéro de publication||2021/029018|
|Statut||Délivré - en vigueur|
|Date de dépôt||2019-08-13|
|Date de publication||2021-02-18|
|Propriétaire||OMRON CORPORATION (Japon)|
AbrégéThe present invention provides a controller for an isolated resonant DC-DC converter which includes a primary-side conversion unit that converts an input DC voltage into an AC voltage, a transformer that has a primary winding and first and second secondary windings, and converts an AC voltage into two AC voltages, and a secondary-side conversion unit having a first switch connected between the first secondary winding and a load, and a second switch connected between the second secondary winding and the load, the controller comprising: an ON-period detection unit that detects a first current flowing between the first secondary winding and the load, and a second current flowing between the second secondary winding and the load, and detects first and second ON-periods, in which the first and second currents are at least predetermined values, during one cycle of a control operation; and a switch control unit that turns on the first switch according to the first ON-period of at least one cycle immediately before a current cycle, and turns on the second switch according to the second ON-period of at least one cycle.