US 12,431,722 B2
Power-saving charging device
Chia-An Yeh, New Taipei (TW); and Wei-Liang Lin, New Taipei (TW)
Assigned to Acbel Polytech Inc., New Taipei (TW)
Filed by ACBEL POLYTECH INC., New Taipei (TW)
Filed on Aug. 29, 2022, as Appl. No. 17/897,915.
Prior Publication US 2024/0072552 A1, Feb. 29, 2024
Int. Cl. H02J 7/00 (2006.01)
CPC H02J 7/0032 (2013.01) [H02J 2207/10 (2020.01)] 13 Claims
OG exemplary drawing
 
1. A power-saving charging device comprising:
a transformer including a primary side winding and a secondary side winding;
an output switch having a control terminal;
a primary side circuit electrically connected between two input terminals of the charging device and the primary side winding;
a secondary side circuit, electrically connected to the secondary side winding and connected to an output terminal of the charging device through the output switch;
a primary side controller, electrically connected to the primary side circuit;
a secondary side controller, electrically connected to a power storage unit, the control terminal of the output switch and the primary side controller;
wherein when the output terminal is in an unconnected state, both the primary side controller and the secondary side controller are in a shutdown state; and
wherein when the output terminal is switched from the unconnected state to a connected state, the power storage unit provides a power-on power to the secondary side controller to allow the secondary side controller to perform a power-on procedure and enter a working state; the primary side controller receives a power-on signal from the power storage unit, and the primary side controller performs the power-on procedure according to the power-on signal and enters the working state.