US 11,929,678 B2
Power supply device using intelligent pre-regulator
Yeong Ryong Yun, Incheon (KR)
Assigned to SJ SOLUTION CO., LTD., Busan (KR)
Appl. No. 17/599,893
Filed by SJ SOLUTION CO., LTD., Busan (KR)
PCT Filed Apr. 9, 2020, PCT No. PCT/KR2020/004801
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2020/213890, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 10-2019-0043663 (KR), filed on Apr. 15, 2019.
Prior Publication US 2022/0173660 A1, Jun. 2, 2022
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01); H02M 3/335 (2006.01)
CPC H02M 3/1582 (2013.01) [H02M 1/007 (2021.05); H02M 1/0093 (2021.05); H02M 3/33507 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A power supply unit using intellectual pre-regulator which comprises an input port connected to a power source realized as battery or generator, an output port connected to an electronic device, a voltage dropping part connected between said input port and said output port to drop an input voltage to match the input voltage to a voltage required by said electronic device, and a detection-control part to detect the voltage required by said electronic device connected to said output port and to transfer the required voltage to said voltage dropping part, wherein, a voltage boost circuit part is further arranged between the positive pole of said input port and a negative pole of said output port, said voltage boost circuit part is controlled by said detection-control part to produce a negative voltage at the negative pole of said output port from a voltage of the battery connected to said input port, and a switching element is further arranged between the negative pole of said input port and the negative pole of said output port, and wherein, said detection-control part makes said voltage boost circuit part being in the off state not to produce the negative voltage when the required voltage of the electronic device is lower than the battery voltage, at this time, said switching element is in the on state to flow a current from the negative pole of said output port to the negative pole of said input port, and the battery voltage is dropped by said voltage dropping part to a voltage same as the required voltage of the electronic device at said output port, meanwhile, said detection-control part makes said voltage boost circuit part switching to produce the negative voltage when the required voltage of the electronic device is higher than the battery voltage, at this time, said switching element is in the off state not to flow the current from the negative pole of said output port to the negative pole of said input port, and the voltage between the positive pole of said input port and the negative pole of said output port is dropped by said voltage dropping part to the voltage same as the required voltage of the electronic device at said output port.