KR-20260065443-A - ELECTRONIC DEVICE HAVING CONVERTER FOR DELIVERING POWER TO LOAD

KR20260065443AKR 20260065443 AKR20260065443 AKR 20260065443AKR-20260065443-A

Abstract

The electronic device includes a converter and a control circuit. The converter includes an input terminal, an output terminal, an inductor, a first capacitor, a second capacitor, and a switching circuit. The converter is configured to convert a voltage conversion ratio representing the ratio of the voltage output to the load through the output terminal to the voltage of the power input from the power source through the input terminal. The switching circuit can set the state of the converter to one of a first connection state, a second connection state, a third connection state, and a fourth connection state. In the first connection state, the first capacitor may be connected between the input terminal and the output terminal, and the inductor and the second capacitor may be connected in series between the input terminal and the output terminal. In the second connection state, the first capacitor may be connected between the input terminal and the output terminal, and the inductor and the second capacitor may be connected in series between the ground of the electronic device and the output terminal. In the third connection state, the inductor and the first capacitor may be connected in series between the input terminal and the output terminal, and the second capacitor may be connected between the ground and the output terminal. In the fourth connection state, the inductor and the first capacitor may be connected in series between the ground and the output terminal, and the second capacitor may be connected between the ground and the output terminal. The control circuit may control the switching circuit so that the converter operates in a first mode based on the voltage conversion ratio being set to be greater than a first value (e.g., 0.25) and less than or equal to a second value (e.g., 0.5). The control circuit may control the switching circuit so that the converter operates in a second mode based on the voltage conversion ratio being set to be greater than the second value and less than or equal to a third value. In the first mode, the state of the converter may be periodically changed in the order of the first connection state, the second connection state, and the fourth connection state. In the second mode, the state of the converter may be periodically changed in the order of the first connection state, the third connection state, and the fourth connection state. The third value is a value less than 1.

Inventors

왕세원
유준상
이경환
김현식

Assignees

삼성전자주식회사
한국과학기술원

Dates

Publication Date: 20260508
Application Date: 20241129
Priority Date: 20241101

Claims (15)

In electronic devices, A converter comprising an input terminal, an output terminal, an inductor, a first capacitor, a second capacitor, and a switching circuit, configured to convert a voltage conversion ratio representing the ratio of the voltage output to a load through the output terminal to the voltage of power input from a power source through the input terminal; and It includes a control circuit, The switching circuit sets the state of the converter to one of a first connection state, a second connection state, a third connection state, and a fourth connection state, and In the first connection state above, a first capacitor is connected between the input terminal and the output terminal, and the inductor and the second capacitor are connected in series between the input terminal and the output terminal, and In the second connection state above, the first capacitor is connected between the input terminal and the output terminal, and the inductor and the second capacitor are connected in series between the ground of the electronic device and the output terminal, and In the third connection state above, the inductor and the first capacitor are connected in series between the input terminal and the output terminal, and the second capacitor is connected between the ground and the output terminal, and In the above fourth connection state, the inductor and the first capacitor are connected in series between the ground and the output terminal, and the second capacitor is connected between the ground and the output terminal, and The above control circuit is, Based on the voltage conversion ratio being set to be greater than a first value and less than or equal to a second value, the switching circuit is controlled so that the converter operates in a first mode, and Based on the voltage conversion ratio being set to be greater than the second value and less than or equal to the third value, the switching circuit is configured to control the converter to operate in a second mode, and In the first mode, the state of the converter is periodically changed in the order of the first connection state, the second connection state, and the fourth connection state, and In the second mode above, the state of the converter is periodically changed in the order of the first connection state, the third connection state, and the fourth connection state, and The above third value is a value less than 1, Electronic device.
In claim 1, the control circuit, while the converter is operating in the first mode or the second mode, A first duty cycle, which represents the ratio of the first time, is fixed to a specified value by comparing the first time, during which the inductor is connected in series between the input terminal and the output terminal together with the first capacitor, and the second time, during which the inductor is connected in series between the input terminal and the output terminal together with the second capacitor. An electronic device configured to adjust the voltage conversion ratio by adjusting a second duty cycle representing the ratio of the third time, compared with the sum of the third time, when one end of the inductor is connected to the input terminal, and the fourth time, when one end of the inductor is connected to the ground.
In claim 2, the control circuit is, An electronic device configured to fix the first duty cycle to 0.5 and perform the first mode or the second mode.
In claim 1, the control circuit is, Based on the voltage conversion ratio being set to be greater than the third value and less than or equal to the fourth value, the switching circuit is configured to control the converter to operate in a third mode, and In the above third mode, the state of the converter is periodically changed in the order of the third connection state and the first connection state, and The above fourth value is 1 or less, Electronic device.
In claim 4, the control circuit, while the converter is operating in the third mode, A second duty cycle, representing the ratio of the third time, is fixed to a specified value when compared with the sum of the third time, when one end of the inductor is connected to the input terminal, and the fourth time, when one end of the inductor is connected to the ground. An electronic device configured to adjust the voltage conversion ratio by adjusting a first duty cycle representing the ratio of the first time, compared with the sum of a first time in which the inductor is connected in series with the first capacitor to the input terminal and the output terminal, and a second time in which the inductor is connected in series with the second capacitor to the input terminal and the output terminal.
In claim 5, the control circuit is, An electronic device configured to fix the second duty to 1 and perform the third mode.
In claim 1, the switching circuit includes switches S1, S2, S3, S4, S5, S6, S7, S8, S9, and S10, and The switches S1 and S2 are connected in series from the input terminal to the ground in the order of S1 and S2, and The switches S3 and S4 are connected in series from the input terminal to the output terminal in the order of S3 and S4, and The switches S9 and S10 are connected in series from the output terminal to the ground in the order of S9 and S10, and One end of the above inductor is connected to a conductive line connecting S1 and S2, and The switches S5 and S6 are connected in series from the output terminal to the other terminal of the inductor in the order of S5 and S6, and The switches S7 and S8 are connected in series from the other end of the inductor to the output terminal in the order of S7 and S8, and One end of the first capacitor is connected to a conductive line connecting S3 and S4, and One end of the second capacitor is connected to a conductive line connecting S9 and S10, and An electronic device in which the other end of the second capacitor is connected to a conductive line connecting S7 and S8.
In claim 7, the control circuit is, A first control signal is output through the switch S1, and a second control signal, which is an inverted signal of the first signal, is output through the switch S2. It is configured to output a third control signal through switches S4, S6, S8, and S10, and to output a fourth control signal, which is an inverted signal of the third control signal, through switches S3, S5, S7, and S9. When the first control signal has a high level and the third control signal has a low level, the state of the converter is configured as the first connection state, and When the first control signal has a low level and the third control signal has a low level, the state of the converter is configured to the second connection state, and When the first control signal has a high level and the third control signal has a high level, the state of the converter is configured to the third connection state, and An electronic device in which the state of the converter is configured as the fourth connection state when the first control signal has a low level and the third control signal has a high level.
In claim 8, switches S1, S2, S3, S4, S5, S6, S7, S8, S9, and S10 are electronic devices comprising MOSFETs.
In claim 1, the load includes a battery, It further includes a power receiving module; and a charging circuit configured to charge the battery using power received from an external power supply device through the power receiving module. The above switching circuit is an electronic device included in the above charging circuit.
In claim 10, the power receiving module is an electronic device comprising a power terminal for receiving power via a wire and/or a coil for receiving power via a wireless connection.
In electronic devices, A converter comprising an input terminal, an output terminal, an inductor, a first capacitor, a second capacitor, and a switching circuit, configured to convert a voltage conversion ratio representing the ratio of the voltage output to a load through the output terminal to the voltage of power input from a power source through the input terminal; Memory for storing instructions; and Includes a processor, The switching circuit sets the converter to one of a first connection state, a second connection state, a third connection state, and a fourth connection state, and In the first connection state above, a first capacitor is connected between the input terminal and the output terminal, and the inductor and the second capacitor are connected in series between the input terminal and the output terminal, and In the second connection state above, the first capacitor is connected between the input terminal and the output terminal, and the inductor and the second capacitor are connected in series between the ground of the electronic device and the output terminal, and In the third connection state above, the inductor and the first capacitor are connected in series between the input terminal and the output terminal, and the second capacitor is connected between the ground and the output terminal, and In the above fourth connection state, the inductor and the first capacitor are connected in series between the ground and the output terminal, and the second capacitor is connected between the ground and the output terminal, and When the above instruction is executed by the processor, the electronic device, Based on the voltage conversion ratio being set to be greater than a first value and less than or equal to a second value, the switching circuit is controlled so that the converter operates in a first mode, and Based on the fact that the above voltage conversion ratio is set to be greater than the second value and less than or equal to the third value, the switching circuit is controlled so that the converter operates in a second mode, and In the first mode, the state of the converter is periodically changed in the order of the first connection state, the second connection state, and the fourth connection state, and In the second mode above, the state of the converter is periodically changed in the order of the first connection state, the third connection state, and the fourth connection state, and The above third value is a value less than 1, Electronic device.
In claim 12, when the above instruction is executed by the processor, the electronic device, While the converter is operating in the first mode or the second mode, A first duty cycle representing the ratio of the first time is fixed to a specified value by comparing the sum of the first time, during which the inductor is connected in series with the first capacitor to the input terminal and the output terminal, and the second time, during which the inductor is connected in series with the second capacitor to the input terminal and the output terminal. An electronic device that adjusts the voltage conversion ratio by adjusting a second duty cycle representing the ratio of the third time, compared with the sum of the third time, when one end of the inductor is connected to the input terminal, and the fourth time, when one end of the inductor is connected to the ground.
In claim 12, when the above instruction is executed by the processor, the electronic device, Based on the voltage conversion ratio being set to be greater than the third value and less than or equal to the fourth value, the switching circuit is controlled so that the converter operates in a third mode, and In the above third mode, the state of the converter is periodically changed in the order of the third connection state and the first connection state, and The above fourth value is 1 or less, Electronic device.
In claim 14, when the above instruction is executed by the processor, the electronic device, While the above converter is operating in the above third mode, A second duty cycle representing the ratio of the third time is fixed to a specified value by comparing the third time, when one end of the inductor is connected to the input terminal, with the sum of the fourth time, when one end of the inductor is connected to the ground, and An electronic device for adjusting the voltage conversion ratio by adjusting a first duty cycle representing the ratio of the first time, compared with the sum of a first time in which the inductor is connected in series with the first capacitor to the input terminal and the output terminal, and a second time in which the inductor is connected in series with the second capacitor to the input terminal and the output terminal.

Description

Electronic device having a converter for delivering power to a load The present disclosure relates to an electronic device having a converter for supplying power to a load (e.g., a battery). The electronic device may include a DC (direct current)-DC converter for converting the ratio of the output voltage to the input voltage (voltage conversion ratio; VCR) and a control circuit for controlling the same. For example, the buck converter may include a plurality of switches (e.g., switched capacitors) and inductors. The control circuit may check the voltage output from the buck converter and, based on the check result, control the state of the switches. Depending on this control, the buck converter may lower the voltage received from a power source (e.g., a travel adapter (TA)) to a specified voltage. Power with the lowered output voltage may be output to a load. The information described above is provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure. In a DC-DC converter, a switch can be switched from a closed state (or turned on) to an open state (or turned off) or vice versa based on the control of a control circuit. When the switch is in the closed state (or when switching from the open state to the closed state), power loss may occur in the switch due to the resistance of the switch when current passes through it. When current passes through an inductor, power loss may occur in the inductor due to the parasitic resistance of the inductor. Power loss (e.g., pass loss) occurring when current passes through switches and inductors is a major factor in the reduction of efficiency. Various embodiments of the present disclosure may provide an electronic device having a DC-DC converter configured to increase power transmission efficiency by reducing conduction losses. The technical problems to be solved by the present disclosure are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. According to one embodiment, an electronic device includes a converter and a control circuit. The converter includes an input terminal, an output terminal, an inductor, a first capacitor, a second capacitor, and a switching circuit. The converter is configured to convert a voltage conversion ratio representing the ratio of the voltage output to a load through the output terminal to the voltage of power input from a power source through the input terminal. The switching circuit can set the state of the converter to one of a first connection state, a second connection state, a third connection state, and a fourth connection state. In the first connection state, the first capacitor may be connected between the input terminal and the output terminal, and the inductor and the second capacitor may be connected in series between the input terminal and the output terminal. In the second connection state, the first capacitor may be connected between the input terminal and the output terminal, and the inductor and the second capacitor may be connected in series between the ground of the electronic device and the output terminal. In the third connection state, the inductor and the first capacitor may be connected in series between the input terminal and the output terminal, and the second capacitor may be connected between the ground and the output terminal. In the fourth connection state, the inductor and the first capacitor may be connected in series between the ground and the output terminal, and the second capacitor may be connected between the ground and the output terminal. The control circuit may control the switching circuit so that the converter operates in a first mode based on the voltage conversion ratio being set to be greater than a first value (e.g., 0.25) and less than or equal to a second value (e.g., 0.5). The control circuit may control the switching circuit so that the converter operates in a second mode based on the voltage conversion ratio being set to be greater than the second value and less than or equal to a third value. In the first mode, the state of the converter may be periodically changed in the order of the first connection state, the second connection state, and the fourth connection state. In the second mode, the state of the converter may be periodically changed in the order of the first connection state, the third connection state, and the fourth connection state. The third value is a value less than 1. According to one embodiment, the electronic device includes a converter; a memory for storing instructions; and a processor. The converter includes an input terminal, an output terminal, an inductor, a first capacitor, a second capacitor, and a switching circuit. The converter may be configured to convert a voltage conversion ratio repre