Electronic device comprising converter circuit and control method therefor

Patent metadata

Field	Value
Publication number	US-2026100652-A1
Application number	US-202519416352-A
Country	US
Kind code	A1
Filing date	Dec 11, 2025
Priority date	Jun 12, 2023
Publication date	Apr 9, 2026
Grant date	—

Abstract

The present disclosure relates to an electronic device comprising a converter circuit for current balancing, and a control method therefor. The electronic device may comprise a plurality of half-bridge converters connected in parallel to share a resonance capacitor. The electronic device can control a first half bridge unit included in a first converter circuit and a second half bridge circuit included in a second converter unit such that the first converter circuit and the second converter unit can be sequentially started at a first time interval.

First claim

What is claimed is:

1 . 1. An electronic device, comprising:
a first converter circuit having a resonant capacitor and including a first leakage inductor and a first transformer; a second converter circuit connected in parallel with the first converter circuit to share the resonant capacitor and including a second leakage inductor and a second transformer; and a control unit configured to control an activation of the first converter circuit and the second converter circuit. wherein the control unit is configured to control a first half-bridge unit included in the first converter circuit and a second half-bridge unit included in the second converter circuit so that the first converter circuit and the second converter circuit are sequentially activated with a first time interval.

2 . The electronic device of claim 1 , comprising an electrolytic capacitor connected in parallel to a secondary side output terminal of the first transformer and a secondary side output terminal of the second transformer.

3 . The electronic device of claim 1 , wherein the control unit comprises a soft starter configured to output a second control signal for a switching operation of the second half-bridge unit in response to the first time interval elapsing after a first control signal for a switching operation of the first half-bridge unit is inputted.

4 . The electronic device of claim 3 , wherein the soft starter comprises:
a first element unit configured to perform a switching operation at the first time interval in response to charging/discharging by a supply voltage; a second element unit configured to generate a first switching signal in response to an operation of the first element unit being turned on at the first time interval; and a switch unit configured to receive the first control signal as input and to output the second control signal in response to the first switching signal.

5 . The electronic device of claim 1 , wherein the first half-bridge unit comprises:
a first switching element configured to be turned on or turned off by a first gate signal, which is one of the first control signals; and a second switching element configured to be turned on or turned off by a second gate signal, which is one of the first control signals.

6 . The electronic device of claim 1 , wherein the second half-bridge unit comprises:
a third switching element configured to be turned on or turned off by a third gate signal, which is one of the second control signals: and a fourth switching element configured to be turned on or turned off by a fourth gate signal, which is one of the second control signals.

7 . The electronic device of claim 1 , comprising a third converter circuit connected in parallel with the first converter circuit to share the resonant capacitor,
wherein the control unit is configured to control the second half-bridge unit included in the second converter circuit and a third half-bridge unit included in the third converter circuit so that the second converter circuit and the third converter circuit are sequentially activated with a second time interval.

8 . The electronic device of claim 1 , wherein the control unit is configured to control the first time interval and the second time interval to have the same value.

9 . The electronic device of claim 1 , wherein the control unit is configured to control the first time interval and the second time interval to have different values.

10 . The electronic device of claim 7 , wherein the control unit comprises the soft starter configured to output a third control signal for a switching operation of the third half-bridge unit in response to the second time interval elapsing after a second control signal for a switching operation of the second half-bridge unit is inputted.

11 . The electronic device of claim 10 , wherein the soft starter comprises:
a third element unit configured to perform a switching operation at the second time interval in response to charging/discharging by a supply voltage; a fourth element unit configured to generate a second switching signal in response to an operation of the first element unit being turned on at the second time interval; and a switch unit configured to receive the second control signal as input and to output the third control signal in response to the second switching signal.

12 . The electronic device of claim 10 , wherein the third half-bridge unit comprises:
a fifth switching element configured to be turned on or turned off by a fifth gate signal, which is one of the third control signals; and a sixth switching element configured to be turned on or turned off by a sixth gate signal, which is one of the third control signals.

13 . The electronic device of claim 4 , wherein the first element unit comprises:
a first capacitor located between a terminal to which the supply voltage is inputted and a ground; and a seventh switching element configured to be switched in response to charging/discharging of the first capacitor.

14 . The electronic device of claim 13 , wherein the second element unit comprises an eighth switching element configured to output the first switching signal in response to turning on of the seventh switching element.

15 . The electronic device of claim 4 , wherein a resistor and a capacitor are connected in parallel between an output terminal of the switch unit where the second control signal is outputted and a ground.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Keonwoo
• Kim Moonyoung

Classifications

• H02M1/36

  Means for starting or stopping converters · CPC title

• H02M1/08

  Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters · CPC title

• H02M3/01

  Resonant DC/DC converters · CPC title

• Y02B70/10

  Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes · CPC title

• H02M1/0067

  Converter structures employing plural converter units, other than for parallel operation of the units on a single load · CPC title