TWM537760U - Electronic device - Google Patents

Abstract

An electronic device is configured to receive a voltage from a power source device. The electronic device includes a loading element, a first switch, a second switch, and a control circuit. The first switch is coupled to the power source device. The second switch is coupled to the power source device. The control circuit is configured to output a first control signal to the power source device. The power source device is configured to selectively output the voltage with a first level or the voltage with a second level according to the first control signal. The electronic device is configured to receive a second control signal outputted from the power source device to control the second switch to be turned on or turned off. The second switch is configured to transmit the voltage with the second level to the loading element.

Description

Electronic device

The present disclosure relates to an electronic device, and more particularly to a direct charge control circuit for an electronic device.

The electronic device can receive the voltage from the power supply device through a direct charge mode or a non-direct charge mode. In the prior art, it is not possible to ensure that the electronic device receives the corresponding voltage through the correct charging path. This may cause damage to internal components of the electronic device.

One embodiment of the present disclosure is directed to an electronic device. The electronic device is configured to receive a voltage from a power supply device. The electronic device includes a load component, a first switch, a second switch, and a control circuit. The first switch is coupled to the power supply device. The second switch is coupled to the power supply device. The control circuit is configured to output a first control signal to the power supply device. The power supply device is configured to selectively output a voltage having a first level or a voltage having a second level according to the first control signal. The electronic device is configured to receive a second control signal outputted from the power supply device to control the second switch to be turned on or off. First The two switches are used to transmit a voltage having a second level to the load element.

Another embodiment of the present disclosure is directed to an electronic device. The electronic device is configured to receive a voltage from a power supply device. The electronic device includes a first load component, a second load component, a first switch, a second switch, and a control circuit. The first switch is coupled between the power supply device and the first load component. The second switch is coupled between the power supply device and the second load component. The control circuit is configured to output a first control signal to the power supply device. The power supply device is configured to selectively output a voltage having a first level or a voltage having a second level according to the first control signal. The electronic device is configured to receive a second control signal outputted from the power supply device. The first switch is configured to be turned on according to the second control signal to transmit the voltage having the first level to the first load component. The second switch is configured to be turned on according to the second control signal to transmit the voltage having the second level to the second load element.

In summary, the electronic device of the present disclosure controls the second switch by the second control signal of the power supply device to prevent the second switch from being mis-conducted, so that the load component of the electronic device is not damaged by the overcurrent. .

120‧‧‧Electronic devices

122‧‧‧First control circuit

124‧‧‧Charging circuit

1242‧‧‧Voltage conversion circuit

1244‧‧‧Detection circuit

1246‧‧‧Processing circuit

126‧‧‧Load components

1282‧‧‧First load element

1284‧‧‧Second load element

140‧‧‧Power supply unit

142‧‧‧Second control circuit

144‧‧‧Voltage conversion circuit

V0‧‧‧ voltage

SW1‧‧‧ first switch

SW2‧‧‧second switch

SW3‧‧‧Power Control Switch

SINGAL1, SINGAL2, SINGAL3, SIGNAL4‧‧‧ control signals

AND‧‧‧ and gate

The above and other objects, features, advantages and embodiments of the present disclosure will become more apparent and understood. The description of the drawings is as follows. FIG. 1 is an illustration of an electronic in accordance with an embodiment of the present disclosure. A schematic diagram of a device and a power supply device; FIG. 2 is a schematic diagram of an electronic device and a power supply device according to an embodiment of the present disclosure; FIG. 3 is a schematic diagram of an electronic device and a power supply device according to an embodiment of the present disclosure; and FIG. 4 is an electronic device and a device according to an embodiment of the present disclosure. Schematic diagram of the power supply unit.

The following embodiments are described in detail with reference to the accompanying drawings, but the embodiments are not intended to limit the scope of the disclosure, and the description of structural operations is not intended to limit the order of execution, any The combination of the structures and the resulting devices with equal efficiency are within the scope of the disclosure. Moreover, the drawings are for illustrative purposes only. For ease of understanding, the same elements in the following description will be denoted by the same reference numerals.

The terms "coupled" or "connected" as used in the following various embodiments may mean that two or more elements are "directly" in physical or electrical contact with each other, or are "indirectly" in physical or electrical contact with each other. It can also mean that two or more components interact with each other.

Please refer to Figure 1. FIG. 1 is a schematic diagram of an electronic device 120 and a power supply device 140 according to an embodiment of the present disclosure. The electronic device 120 is configured to receive the voltage V0 from the power supply device 140.

In an embodiment, the electronic device 120 can be a mobile phone, a notebook computer, a camera, or other various electronic devices. The power supply unit 140 can be a power adapter or other various power supply devices that can provide power.

The electronic device 120 includes a load element 126, a first switch SW1, a second switch SW2, and a first control circuit 122. In an embodiment The electronic device 120 further includes a charging circuit 124. The power supply device 140 includes a second control circuit 142 and a voltage conversion circuit 144.

As shown in FIG. 1 , the first control circuit 122 is coupled to the second control circuit 142 . The second control circuit 142 is coupled to the voltage conversion circuit 144. The first switch SW1 is coupled between the voltage conversion circuit 144 and the charging circuit 124. The second switch SW2 is coupled between the voltage conversion circuit 144 and the load element 126. The load component 126 is further coupled to the charging circuit 124. The second control circuit 142 is coupled to the control end of the second switch SW2 and the control end of the first switch SW1.

In one embodiment, the first switch SW1 is implemented as a single P-type transistor, and the second switch SW2 is implemented as a single N-type transistor. The present disclosure does not limit the types of the first switch SW1 and the second switch SW2. Various transistors that enable the switches SW1~SW2 are within the scope of the present disclosure. In one embodiment, the transistors may be bipolar junction transistors (BJT), metal oxide semiconductor field effect transistors (MOSFETs), or insulated gate bipolar transistors (IGBTs).

In one embodiment, the first switch SW1 is implemented by a single P-type transistor coupled with a corresponding logic circuit. In one embodiment, the first switch SW1 and the second switch SW2 are implemented by a one-to-two over voltage protection (OVP) wafer.

In an embodiment, the first control circuit 122 and the second control circuit 142 may be a system on chip (SoC); the voltage conversion circuit 144 may be a flyback converter or other various converters; Load element 126 can be a battery or other various electrical loads.

The electronic device 120 has two charging modes. One is the non-direct charge mode. The other is the direct charge mode. When the electronic device 120 is in the indirect charging mode, the electronic device 120 will receive the voltage V0 having the first level (for example, 5 volts) through the first switch SW1. When the electronic device 120 is in the direct charging mode, the electronic device 120 will receive the voltage V0 having the second level (eg, 4 volts or less) through the second switch SW2 to directly charge the load element 126. In an embodiment, when the power supply device 140 directly charges the electronic device 120, the aforementioned second level will be changed by the load component 126. In an embodiment, the second level is a variable value. In an embodiment, the first level is higher than the second level.

The detailed operation will be described in conjunction with Figure 1. The first control circuit 122 is configured to output a control signal SIGNAL1 to the second control circuit 142. Next, the second control circuit 142 controls the power conversion circuit 144 to output a voltage V0 having a first level or a voltage V0 having a second level according to the control signal SIGNAL1. The second control circuit 142 further outputs the control signal SIGNAL2 to the electronic device 120 according to the control signal SIGNAL1. The first switch SW1 is turned on or off according to the control signal SIGNAL2. The second switch SW2 is turned on or off according to the control signal SIGNAL2.

In an embodiment, the first control circuit 122 is coupled to the load component 126. In an embodiment, the first control circuit 122 determines the logic value of the control signal SIGNAL1 according to the state of the load component 126. In an embodiment, when the amount of power of the load component 126 exceeds a predetermined amount of power, the first control circuit 122 outputs a control signal SIGNAL1 having a logic value of “0” to enter Line operation in indirect charging mode. In an embodiment, when the power of the load component 126 is lower than the preset power, the first control circuit 122 outputs a control signal SIGNAL1 having a logic value of "1" to perform the operation of the direct charge mode.

In an embodiment, in the indirect charging mode, the first control circuit 122 outputs a control signal SIGNAL1 having a logic value of “0” to the second control circuit 142. When the second control circuit 142 receives the control signal SIGNAL1 having a logic value of "0", the second control circuit 142 controls the voltage conversion circuit 144 to generate the voltage V0 having the first level. Next, the second control circuit 142 outputs a control signal SIGNAL2 having a logical value of "0". In an embodiment, since the first switch SW1 is implemented by PMOS, the first switch SW1 will be turned on. In an embodiment, since the second switch SW2 is implemented by NMOS, the switch SW2 will be turned off. The voltage V0 having the first level will be transmitted to the charging circuit 124 through the first switch SW1. The charging circuit 124 converts the voltage V0 having the first level into the voltage V0 having the second level. Next, the charging circuit 124 outputs a voltage V0 having a second level to the load element 126 to indirectly charge the load element 126. Therefore, in the indirect charging mode, the electronic device 120 receives the voltage V0 having the first level through the first switch SW1.

In an embodiment, in the direct charging mode, the first control circuit 122 outputs a control signal SIGNAL1 having a logic value of "1" to the second control circuit 142. When the second control circuit 142 receives the control signal SIGNAL1 having a logic value of "1", the second control circuit 142 controls the voltage conversion circuit 144 to generate the voltage V0 having the second level. Then, the second control The circuit 142 outputs a control signal SIGNAL2 having a logical value of "1". In an embodiment, since the first switch SW1 is implemented by PMOS, the first switch SW1 will be turned off. In an embodiment, since the second switch SW2 is implemented by an NMOS, the switch SW2 will be turned on. The voltage V0 having the second level will be transmitted to the load element 126 through the second switch SW2 to directly charge the load element 126. Therefore, in the direct charging mode, the electronic device 120 receives the voltage V0 having the second level through the second switch SW2.

In the direct charge mode, voltage V0 is transmitted to load element 126 through second switch SW2. Voltage V0 does not pass through charging circuit 124. Therefore, the power conversion loss of the charging circuit 124 can be reduced, and the heat source generation on the electronic device 120 can be reduced, and the problems caused by various overheating can be reduced.

In addition, the power supply device 140 will be able to control the timing of the voltage V0 and the control signal SIGNAL2. That is, the power supply device 140 can control the second switch SW2 to be turned on when the voltage V0 has the second level. Therefore, the second switch SW2 can be prevented from being turned on when the voltage V0 has the first level, thereby preventing the electronic device 120 from receiving the voltage V0 having the first level through the second switch SW2. Thereby, internal components of the electronic device 120 can be prevented from being damaged.

Moreover, after the electronic device 120 is removed from the power supply device 140, the control signal SIGNAL2 cannot be transmitted to the electronic device 120. Therefore, when the electronic device 120 is removed from the power supply device 140, the second switch SW2 will be turned off. In this way, the power of the load component 126 (eg, the battery) can be prevented from leaking through the second switch SW2 to the connection terminal of the electronic device 120.

In an embodiment, the control signal SIGNAL1 and the control signal The transmission of SIGNAL2 can be implemented through various protocols. For example: integrated inter-system (I2C) protocol, configuration channel (CC) protocol, power transfer (PD) protocol, general purpose input and output (GPIO), DP/DM protocol, ID protocol, SBU protocol.

Please refer to Figure 2. FIG. 2 is a schematic diagram of an electronic device 120 and a power supply device 140 according to an embodiment of the present disclosure. For ease of understanding, similar elements in Fig. 2 will be given the same reference numerals as in Fig. 1.

In an embodiment, the electronic device 120 further includes a AND gate. The gate AND has a first input, a second input, and an output. The first input end of the AND gate is coupled to the first control circuit 122 to receive the control signal SIGNAL1. The second input end of the AND gate is coupled to the second control circuit 142 to receive the control signal SIGNAL2. The AND gate is used to perform a AND operation on the control signal SIGNAL1 and the control signal SIGNAL2 to generate a control signal SIGNAL3. The output of the control signal SIGNAL3 through the AND gate AND is transmitted to the control terminal of the first switch SW1 and the control terminal of the second switch SW2. The first switch SW1 and the second switch SW2 will be turned on or off according to the control signal SIGNAL3.

In an embodiment, in the indirect charging mode, the control signal SIGNAL1 has a logic value of "0" and the control signal SIGNAL2 has a logic value of "0". Therefore, the control signal SIGNAL3 generated by the AND gate AND has a logical value of "0". In an embodiment, since the first switch SW1 is implemented by PMOS, the first switch SW1 will be turned on and the second switch SW2 will be turned off. The voltage V0 having the first level is transmitted through the first switch SW1 It is input to the charging circuit 124 to perform the above operation regarding the indirect charging mode.

In an embodiment, in the direct charging mode, the control signal SIGNAL1 has a logic value of "1" and the control signal SIGNAL2 has a logic value of "1". Therefore, the control signal SIGNAL3 generated by the AND gate AND has a logical value "1". In an embodiment, since the first switch SW1 is implemented by PMOS, the first switch SW1 will be turned off and the second switch SW2 will be turned on. The voltage V0 having the second level is transmitted to the load element 126 through the second switch SW2 to perform the above operation with respect to the direct charge mode. For the rest of the related content, please refer to the foregoing embodiment, and details are not described herein again.

In an embodiment, since the control signal SIGNAL3 is generated according to the two control signals SIGNAL1 and SIGNAL2, the switching accuracy of the first switch SW1 and the second switch SW2 can be ensured. In an embodiment, when the logic value of at least one of the control signals SIGNAL1 and SIGNAL2 is not "1", the second switch SW2 will be turned off to prevent the electronic device 120 from performing a direct charging operation.

Please refer to Figure 3. FIG. 3 is a schematic diagram of an electronic device 120 and a power supply device 140 according to an embodiment of the disclosure. For ease of understanding, similar elements in Fig. 3 will be given the same reference numerals as in Fig. 1.

As shown in FIG. 3, in an embodiment, the first switch SW1 is included in the charging circuit 124. The charging circuit 124 further includes a voltage conversion circuit 1242, a detection circuit 1244, a processing circuit 1246, and a power control switch SW3. In an embodiment, the first switch SW1 and the charging circuit 124 may be Charging IC (Charger IC). The voltage conversion circuit 1242 is coupled between the first switch SW1 and the power control switch SW3. The power control switch SW3 is coupled between the voltage conversion circuit 1242 and the load component 126. The detection circuit 1244 is coupled between the voltage conversion circuit 144 and the processing circuit 1246. The processing circuit 1246 is coupled to the voltage conversion circuit 1242, the control terminal of the first switch SW1, and the control terminal of the power control switch SW3. In an embodiment, the power control switch SW3 may be an NMOS.

In an embodiment, the detecting circuit 1244 is configured to detect the voltage level of the voltage V0. In one embodiment, voltage V0 has a first level in the indirect charging mode. When the detecting circuit 1244 detects that the voltage level of the voltage V0 is the first level, the processing circuit 1246 outputs the control signal SIGNAL3 having the logic value “0” to the control end of the first switch SW1. In an embodiment, since the first switch SW1 is implemented by PMOS, the first switch SW1 will be turned on. In one embodiment, the processing circuit 1246 outputs a control signal SIGNAL4 to the power control switch SW3 to control its current magnitude. In one embodiment, since the current control switch SW3 is implemented as a MOSFET, the processing circuit 1246 operates the power control switch SW3 in a saturation region to achieve a control current. In an embodiment, the first switch SW1 transmits the voltage V0 having the first level to the voltage conversion circuit 1242. The voltage conversion circuit 1242 converts the level of the voltage V0 from the first level to the second level. Next, the power control switch SW3 transmits the voltage V0 having the second level to the load element 126 to perform the above-described operation with respect to the indirect charging mode. For the rest of the related content, please refer to the foregoing embodiment, and details are not described herein again.

Please refer to Figure 4. Figure 4 is a diagram in accordance with the present disclosure. A schematic diagram of the electronic device 120 and the power supply device 140 shown in the embodiment. For ease of understanding, similar elements in Fig. 4 will be given the same reference numerals as in Fig. 1.

As shown in FIG. 4, in an embodiment, the electronic device 120 further includes a first load component 1282 and a second load component 1284. In one embodiment, the first load component 1282 and the second load component 1284 can be a memory, a display, a speaker, a wireless communication circuit, or other various internal load components. The first load element 1282 and the second load element 1284 have different voltage requirements, respectively. In one embodiment, the voltage requirement of the first load component 1282 is 5 volts (first level) and the voltage requirement of the second load component 1284 is 4 volts or less (second level).

The first switch SW1 is coupled between the power supply device 140 and the first load component 1282. The second switch SW2 is coupled between the power supply device 140 and the second load component 1284. When the first switch SW1 is turned on by the control signal SIGNAL2, the first switch SW1 transmits the voltage V0 having the first level to the first load element 1282. When the second switch SW2 is turned on by the control signal SIGNAL2, the second switch SW2 transmits the voltage V0 having the second level to the second load element 1284. In an embodiment, the first switch SW1 may be a single P-type transistor, and the second switch SW2 may be a single N-type transistor. Therefore, when the first switch SW1 is turned on, the second switch SW2 is turned off.

The disclosure has been disclosed in the above embodiments, and is not intended to limit the disclosure, and the scope of the disclosure is defined by the scope of the appended claims.

120‧‧‧Electronic devices

122‧‧‧First control circuit

124‧‧‧Charging circuit

126‧‧‧Load components

140‧‧‧Power supply unit

142‧‧‧Second control circuit

144‧‧‧Voltage conversion circuit

V0‧‧‧ voltage

SW1‧‧‧ first switch

SW2‧‧‧second switch

SINGAL1, SINGAL2‧‧‧ control signal

Claims (10)

An electronic device for receiving a voltage from a power supply device, the electronic device comprising: a load component; a first switch coupled to the power supply device; and a second switch coupled to the power supply device and the load And a control circuit for outputting a first control signal to the power supply device, wherein the power supply device is configured to selectively output the voltage having a first level or have a first level according to the first control signal The second level of the voltage, the electronic device is configured to receive a second control signal outputted from the power supply device to control the second switch to be turned on or off, and the second switch is configured to have the second level This voltage is transmitted to the load element. The electronic device of claim 1, further comprising: a charging circuit coupled between the first switch and the load component, wherein the first switch is configured to be turned on according to the second control signal to have The voltage of the first level is transmitted to the charging circuit. The electronic device of claim 2, wherein the charging circuit is configured to convert the voltage having the first level into the voltage having the second level, and output the second level This voltage is given to the load element. The electronic device of claim 1, further comprising: a gate for generating a third control signal according to the first control signal and the second control signal, wherein the first switch and the second The switch is turned on or off according to the third control signal. The electronic device of claim 1, further comprising: a charging circuit coupled between the power supply device and the load component, the charging circuit comprising: the first switch; a voltage conversion circuit coupled Between the first switch and the load component; a detection circuit for detecting a voltage level of the voltage; and a processing circuit, when the voltage level of the voltage is the first level, the processing circuit For outputting a third control signal, the first switch is configured to be turned on according to the third control signal to transmit the voltage having the first level to the voltage conversion circuit, and the voltage conversion circuit is configured to have the first A predetermined voltage is converted to the voltage having the second level, and the voltage having the second level is output to the load element. The electronic device of claim 5, wherein the charging circuit further comprises: a power control switch coupled to the voltage conversion circuit and the load element Between the devices, when the voltage level of the voltage is the first level, the processing circuit is configured to output a fourth control signal, and the power control switch is configured to be turned on according to the fourth control signal to be from the voltage conversion circuit. The voltage having the second level is transmitted to the load element. The electronic device of claim 1, wherein the load component is a battery. The electronic device of claim 1, wherein the first level is higher than the second level. An electronic device for receiving a voltage from a power supply device, the electronic device comprising: a first load component; a second load component; a first switch coupled to the power supply device and the first load component a second switch coupled between the power supply device and the second load component; and a control circuit for outputting a first control signal to the power supply device, wherein the power supply device is configured to perform the first control The signal selectively outputs the voltage having a first level or the voltage having a second level, the electronic device is configured to receive a second control signal outputted by the power device, the first switch is used to Transmitting according to the second control signal to transmit the voltage having the first level to the first load component, and the second switch The second control signal is turned on according to the second control signal to transmit the voltage having the second level to the second load component. The electronic device of claim 9, wherein the second switch is turned off when the first switch is turned on.