CN108631377B - Power-on control circuit and mobile power supply device using same - Google Patents
Power-on control circuit and mobile power supply device using same Download PDFInfo
- Publication number
- CN108631377B CN108631377B CN201710173613.9A CN201710173613A CN108631377B CN 108631377 B CN108631377 B CN 108631377B CN 201710173613 A CN201710173613 A CN 201710173613A CN 108631377 B CN108631377 B CN 108631377B
- Authority
- CN
- China
- Prior art keywords
- power
- pull
- microcontroller
- power supply
- control circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Power Sources (AREA)
Abstract
The invention discloses a power-on control circuit and a mobile power supply device using the same. The power-on control circuit comprises a pull-down resistor, a pull-down transistor, a diode and a capacitor. The pull-down resistor receives a voltage detection signal from a configuration channel pin. When the pull-down transistor is turned on, the pull-down transistor pulls down the pull-down resistor to ground potential. When the voltage detection signal is at a high potential, the diode is conducted to charge the capacitor to a first voltage for conducting the pull-down transistor. When the voltage detection signal is at a low potential, the diode is closed to keep the voltage across the capacitor at a first voltage, and the pull-down transistor is turned on. When the electronic device sending the voltage detection signal detects that the pull-down resistor is pulled down to the ground potential through the voltage detection signal, the electronic device supplies power to the microcontroller through the universal serial bus Type-C socket, and the microcontroller is kept in a power-on state. The power-on control circuit provided by the invention can keep the microcontroller in a power-on state.
Description
Technical Field
The present invention relates to a power-on control circuit, and more particularly, to a power-on control circuit for maintaining a microcontroller in a power-on state.
Background
In the modern life, people's dependence on mobile devices (e.g., smart phones, tablet computers, etc.) is increasing day by day. In addition, there are currently many mobile devices that use a non-replaceable battery design. Many users choose to carry a portable power source to charge their mobile device for use throughout the day. In this case, a mobile device conforming to the USBType-C standard supporting fast charging and discharging and bidirectional charging and discharging becomes an important choice for users. In view of the above, the present invention provides a power-on control circuit to support specific functions of a USB Type-C mobile device.
Disclosure of Invention
The invention relates to a product related to a USB Type-C Power transmission (Power Delivery, hereinafter referred to as PD) technology, such as a mobile Power supply (Power Bank). In a low Battery (Dead Battery) mode of the portable power source, a micro control unit (micro control unit) inside the portable power source fails to operate. At this time, the battery and the microcontroller of the mobile power supply are charged by the 5V (vSafe5V) provided by an external Dual purpose Port (DRP) system through the power-on control circuit provided by the invention. After the mobile power supply obtains a certain electric quantity, the PD communication is carried out according to the requirement.
An embodiment of the present invention provides a power-on control circuit, which can be connected to a dual-purpose device through a first usb Type-C connection terminal to keep a microcontroller in a power-on state. The power-up control circuit includes: a pull-down resistor having a first end and a second end, the first end being electrically connected to a configured channel pin of the USB Type-C connection; a pull-down switch electrically connected to the second end of the pull-down resistor and a ground node, respectively; and an enabling device connected with the first switch and the configuration channel pin. When the enabling device receives a voltage detection signal transmitted by the dual-purpose end device through the configuration channel pin, the enabling device conducts the first switch to enable the first pull-down resistor to be grounded, so that the dual-purpose end device can detect the first pull-down resistor through the configuration channel pin and further supply power to the microcontroller through the power supply pin, and the microcontroller is kept in a power-on state.
An embodiment of the invention provides a mobile power supply device. The mobile power supply device comprises a first universal serial bus Type-C connecting end, a second universal serial bus Type-C connecting end and a third universal serial bus Type-C connecting end, wherein the first universal serial bus Type-C connecting end comprises a first configuration channel pin and a first power supply pin; a microcontroller coupled to the first configuration channel pin and the first power supply pin, respectively; and the first power-on control circuit can be connected with a dual-purpose end device through the first universal serial bus Type-C connecting end. The first power-up control circuit includes: a first pull-down resistor having a first end and a second end, the first end being electrically connected to the first configuration channel pin; a first pull-down switch electrically connected to the second end of the first pull-down resistor and a ground node, respectively; and an enabling device connected with the first switch and the first configuration channel pin. When the enabling device receives a first voltage detection signal transmitted by the dual-purpose end device through the first configuration channel pin, the enabling device conducts the first switch to enable the first pull-down resistor to be grounded, so that the dual-purpose end device can detect the first pull-down resistor through the first configuration channel pin and further supply power to the microcontroller of the mobile power supply device through the first power supply pin, and the microcontroller is kept in a power-on state.
Drawings
FIG. 1 is a block diagram of a power-on control circuit 11 implemented according to an embodiment of the invention;
fig. 2 is a block diagram of a mobile power supply apparatus 2 according to an embodiment of the present invention;
fig. 3 is a block diagram of a mobile power supply apparatus 3 according to another embodiment of the present invention;
fig. 4 is a block diagram of mobile power supply apparatus 4 according to another embodiment of the present invention.
Description of reference numerals:
11. 21, 31, 41, 46-power-on control circuit;
12. 22, 32, 42-microcontroller;
2. 3, 4-a mobile power supply device;
20. 30, 40, 47-external dual-purpose end device;
110 to an enabling device;
201. 301, 361, 401, 471-USB Type-C connection;
23. 200, 300, 33, 35, 360, 400, 43, 45, 470-USB Type-C socket;
24. 34, 44 to a display device;
320. 420-bridge transistor;
36-a downlink end device;
RD, RD1 pull-down resistor;
RP-pull-up resistance;
r1-resistor;
q1-pull-down transistor;
d1, D31, D32, D41 and D42-diodes;
c1-capacitor.
Detailed Description
Illustrative embodiments or examples of the disclosure will be described below. The embodiments of the present disclosure are not limited thereto. Those skilled in the art should appreciate that they may make various changes, substitutions and alterations herein without departing from the spirit and scope of the present disclosure. In embodiments of the present disclosure, reference numerals may be used repeatedly, and several embodiments of the present disclosure may share the same reference numerals, but feature elements used for one embodiment are not necessarily used for another embodiment.
Fig. 1 is a block diagram of a power-up control circuit 11 implemented according to an embodiment of the present invention. In the present embodiment, the power-on control circuit 11 is electrically connected to a microcontroller 12, and receives a voltage detection signal from a Configuration Channel pin (hereinafter referred to as CC pin) of a USB Type-C connector or socket (hereinafter referred to as USB Type-C socket), wherein the voltage detection signal may be a square wave signal or other types of detection signals. In the USB Type-C specification, the CC pin may be a CC1 pin or a CC2 pin among 24 pins. The CC pin is used for detecting the connection between USB Type-C devices, detecting the positive and negative insertion between a USB Type-C socket and a USB Type-C plug, establishing and managing the connection of data between USB Type-C devices and VBUS and the like. The power-on control circuit 11 can be connected to an external dual-purpose terminal device through the Type-C connection terminal of the universal serial bus.
In the embodiment, the power-on control circuit 11 and the microcontroller 12 are components of a mobile power supply device, but the invention is not limited thereto; the power-on control circuit 11 and the microcontroller 12 may also be components of a mobile power supply device, a switch card, a computer device, or any type of Dual Role Port (DRP). In the present embodiment, the microcontroller 12 may be implemented by a logic circuit. In other embodiments of the present invention, the microcontroller 12 may also be implemented by a microprocessor, an analog integrated circuit, an Application Specific Integrated Circuit (ASIC), a programmable logic gate array (FPGA), a digital signal processing chip (DSP chip), or the like.
In this embodiment, the main functions of the power-on control circuit 11 of the mobile power supply device are: when the external dual-purpose terminal device is connected to the USB Type-C socket of the portable power supply device, the microcontroller 12 of the portable power supply device is kept powered on at any time, so as to avoid the situation that the microcontroller 12 cannot work when the portable power supply device is in the low power mode.
In the present embodiment, the power-up control circuit 11 includes a pull-down resistor RD, a pull-up resistor RP, a resistor R1, a pull-down transistor Q1, and an enable device 110 formed by a diode D1 and a capacitor C1. The pull-down transistor Q1 may be a bipolar transistor or a unipolar transistor (field effect transistor). As shown in fig. 1, a first terminal of the pull-down resistor RD is electrically connected to the CC pin of a USB Type-C socket through a first node N1 for receiving the voltage detection signal sent to the CC pin by the external dual-purpose device. The pull-up resistor RP is electrically connected to the microcontroller 12 and the first node N1, respectively. The pull-down transistor Q1 is electrically connected to the pull-down resistor RD, a second node N2 and a ground node, respectively. The anode of the diode D1 is electrically connected to the CC pin through the first node N1, and the cathode of the diode D1 is electrically connected to the second node N2. More specifically, the anode of the diode D1 is electrically connected to the first node N1 through the resistor R1. The resistor R1 is electrically connected to the first node N1 and the anode of the diode D1, respectively. The capacitor C1 includes a first terminal connected to the second node N2 and a second terminal connected to the ground node GND.
When the enable device 110 receives the voltage detection signal transmitted by the dual-purpose device through the configuration channel pin CC, the enable device 110 turns on the pull-down transistor Q1 to ground the first pull-down resistor RD. In the present embodiment, when the pull-down transistor Q1 is turned on, the pull-down transistor Q1 pulls down a second terminal of the pull-down resistor RD to a ground potential GND. When the voltage detection signal is at a high level, the diode D1 is turned on to charge the first terminal of the capacitor C1 to a first voltage (i.e., the second node N2 is charged to the first voltage), wherein the first voltage is used to turn on the pull-down transistor Q1. When the voltage detection signal is at a low level, the diode D1 is turned off to keep a voltage across the capacitor C1 at the first voltage, thereby turning on the pull-down transistor Q1.
In the embodiment, when the external dual-purpose device detects that the pull-down resistor RD is pulled down to the ground potential GND through the voltage detection signal, the external dual-purpose device supplies power to the microcontroller 12 through the USB Type-C socket of the portable power device, so that the microcontroller 12 is kept in the power-on state. Therefore, no matter the voltage detection signal is at a high level or a low level, the mobile power device can allow the external dual-purpose device to detect the pull-down resistor RD of the mobile power device through the power-up control circuit 11. Therefore, the external dual-purpose device is fixed as a Downstream (UFP) device (or called Sink) according to the detection of the pull-down resistor RD, and determines that the connected mobile power device is a Downstream (DFP) device (or called Source). At this time, the downstream device provides power to the microcontroller 12 of the portable power device through a VBUS pin of the USB Type-C socket, so that the microcontroller 12 is kept in a power-on state and can operate normally. The normal operation of the microcontroller 12 ensures that the mobile power supply unit can correctly detect an electronic device externally connected to the mobile power supply unit.
In this embodiment, one function of keeping the microcontroller 12 in the power-on state is to: under the condition that the mobile power supply device has no power at all, the external dual-purpose device can immediately supply power to the microcontroller 12 when being connected to the mobile power supply device, so that the microcontroller 12 can keep a power-on state and can normally operate.
In the embodiment shown in fig. 1, if the power-up control circuit 11 does not have the diode D1 and the capacitor C1 and the detection period of the external dual-purpose device is low (i.e., the voltage detection signal is at a low level), the pull-down transistor Q1 is turned off (not turned on) at this time, so that the external dual-purpose device does not detect the pull-down resistor RD and turns off the VBUS pin. More specifically, at this time, the pull-down transistor Q1 is turned off (not conducting) so that the external dual-purpose device does not detect the pull-down resistor RD and does not supply power to the microcontroller 12. Thus, the diode D1 and the capacitor C1 of the power-up control circuit 11 function to ensure that the external dual-purpose device continues to sense the pull-down resistor RD to supply power to the microcontroller 12.
Fig. 2 is a block diagram of the mobile power supply apparatus 2 according to an embodiment of the invention. In the embodiment shown in fig. 2, the mobile power supply device 2 includes a power-on control circuit 21, a microcontroller 22, a USB Type-C socket 23 and a display device 24. The external dual-purpose terminal device 20 is connected to the USB Type-C socket 23 of the portable power supply device 2 through the USB Type-C connection 201. The microcontroller 22 is electrically connected to the power-on control circuit 21, the USB Type-C socket 23 and the display device 24, respectively. In this embodiment, the system diagram shown in fig. 2 of the present invention is not limited to the mobile power supply device. In other embodiments of the present invention, the system shown in fig. 2 may also be a patch card, a computer device, or any other type of dual-purpose device.
In the present embodiment, the internal components of the power-on control circuit 21 may correspond to the respective components of the power-on control circuit 11 shown in the foregoing embodiments. In other words, the power-on control circuit 21 of the mobile power supply device 2 includes all circuit elements of the power-on control circuit 11 shown in fig. 1 and has all circuit functions of the power-on control circuit 11. The microcontroller 22 may be a logic circuit provided in the mobile power supply device 2. In other embodiments of the present invention, the microcontroller 22 may also be a microprocessor, an analog integrated circuit, an Application Specific Integrated Circuit (ASIC), a programmable gate array (FPGA), a digital signal processing chip (DSP chip), or the like in a dual-purpose device. The display device 24 may be a liquid crystal display screen or a display lamp (e.g., LED lamp) of the mobile power device 2, but the invention is not limited thereto.
In the present embodiment, the main functions of the power-on control circuit 21 of the mobile power supply device 2 are: when the external dual-purpose terminal device 20 is connected to the USB Type-C socket 23 of the portable power source device 2 through the USB Type-C connection 201, the microcontroller 22 of the portable power source device 2 is kept in the power-on state at any time, so as to avoid the situation that the microcontroller 22 of the portable power source device 2 cannot work in the low power mode.
In this embodiment, one function of keeping the microcontroller 22 in the power-on state is to: in the situation that the mobile power supply device 2 has no power at all, the external dual-purpose device 20 can supply power to the microcontroller 22 immediately when being connected to the mobile power supply device 2, so that the microcontroller 22 can keep a power-on state and can operate normally. Another function of microcontroller 22 remaining in the powered state is: the microcontroller 22 can reflect the current power level of the mobile power device 2 through a display device 24 (e.g., a liquid crystal display) of the mobile power device 2 to let the user know the current power level. Therefore, when the portable power source device 2 is completely without power, the user can know the information that the portable power source device 2 is currently in the low power mode or the battery level of the portable power source device 2 from the display device 24 by connecting the external dual-purpose terminal device 20 to the portable power source device 2.
Fig. 3 is a block diagram of a mobile power supply apparatus 3 according to another embodiment of the present invention. In the embodiment shown in fig. 3, the mobile power device 3 includes a power-on control circuit 31, a microcontroller 32, a USB Type-C socket 33, a USB Type-C socket 35, a pull-down resistor RD1, a diode D31, a diode D32, and a display device 34. The external dual-purpose end device 30 is connected to the USB Type-C socket 33 of the mobile power supply device 3 through the USB Type-C connection 301, and the downstream end device 36 is connected to the USB Type-C socket 35 of the mobile power supply device 3 through the USB Type-C connection 301. The system diagram shown in fig. 3 of the present invention is not limited to the mobile power supply device. In other embodiments of the present invention, the system shown in fig. 3 may also be a switch card, a computer device, or any other type of dual-purpose device.
Similar to the portable power source device 2 shown in fig. 2, the power-on control circuit 31, the microcontroller 32, the USB Type-C socket 33 and the display device 34 of the portable power source device 3 may respectively correspond to the power-on control circuit 21, the microcontroller 22, the USB Type-C socket 23 and the display device 24 of the portable power source device 2. Therefore, the portable power supply device 3 has all the circuit functions of the portable power supply device 2.
In the embodiment, the downstream device 36 is a power adapter (source adapter), but the invention is not limited thereto. The downstream device 36 supplies power to the mobile power supply device 3 through the VBUS pin of the USB Type-C socket 360. The pull-down resistor RD1 is designed to make the portable power device 3 only obtain power from the USB Type-C socket 35, but not supply power to the external electronic device through the USB Type-C socket 35. In other words, an external electronic device (e.g., an external dual-purpose device) connected to the USB Type-C socket 35 can only detect the pull-down resistor of the mobile power device 3, and determine that the mobile power device 3 is an uplink device. Conversely, the microcontroller 32 of the mobile power device 3 may enable the external electronic device connected to the USB Type-C socket 33 to detect the pull-up resistance of the mobile power device 3 through other mechanisms (for example, the external dual-purpose device 30 detects the pull-up resistance of the mobile power device 3 through the CC2 pin of the USB Type-C socket 33), and then determines that the mobile power device 3 is an uplink device.
In the embodiment, compared to the mobile power supply apparatus 2, the mobile power supply apparatus 3 further includes a bridge transistor 320, a diode D31 and a diode D32. The microcontroller 32 is electrically connected to the gate of the bridge transistor 320. The microcontroller 32 operates the bridge transistor 320 to determine whether to interwork VBUS between the external dual-purpose side device 30 and the downstream side device 36. The diode D31 and the diode D32 function to: when the bridge transistor 320 is not turned on, the power sources of the two sides (the external dual-purpose device 30 and the downstream device 36) are prevented from communicating with each other, thereby protecting the devices on the two sides.
In the present embodiment, if the bridge transistor 320 is used as a bridge board and one of the external dual-purpose device 30 and the downstream device 36 is used as a downstream device (Source), the microcontroller 32 obtains a stable power when the downstream device (Source) is connected to the portable power device 3. At this time, the bridge transistor 320 is turned on.
In the present embodiment, if the external dual-purpose device 30 is used as the upstream device (Sink) and the power supply device 3 is connected, the microcontroller 32 only obtains the power for the holding operation but does not turn on the bridge transistor 320. Until a Source at the downstream side is connected to the portable power device 3 to establish a stable power supply, the microcontroller 32 turns on the bridge transistor 320, and converts the external dual-purpose device from the Sink at the upstream side to the Source at the downstream side to supply power.
Fig. 4 is a block diagram of mobile power supply apparatus 4 according to another embodiment of the present invention. In the embodiment shown in fig. 4, the mobile power device 4 includes a power-on control circuit 41, a microcontroller 42, a USB Type-C socket 43, a USB Type-C socket 45, a power-on control circuit 46, a diode D41, a diode D42, and a display device 44. External dual-purpose end device 40 is connected to USB Type-C receptacle 43 of portable power source device 4 through USB Type-C connection 401, and USB Type-C receptacle 470 of external dual-purpose end device 47 is connected to USB Type-C receptacle 45 of portable power source device 4 through USB Type-C connection 471. The system diagram shown in fig. 4 of the present invention is not limited to the mobile power supply device. In other embodiments of the present invention, the system shown in FIG. 4 may also be a switch card, a computer device, or any type of dual-purpose device. The power-on control circuits 41, 46 have the same configuration as the circuit example shown in the power-on control circuit 11 of fig. 1.
Similar to the portable power source device 2 shown in fig. 2, the power-on control circuit 41, the microcontroller 42, the USB Type-C socket 43 and the display device 44 of the portable power source device 4 may respectively correspond to the power-on control circuit 21, the microcontroller 22, the USB Type-C socket 23 and the display device 24 of the portable power source device 2. Therefore, the portable power supply device 4 has all the circuit functions of the portable power supply device 2. Compared with the portable power supply device 2, the portable power supply device 4 further includes another set of power-on control circuit and USB Type-C socket (i.e. the power-on control circuit 46 and the USB Type-C socket 45). In this embodiment, the power-on control circuit 46 and the USBType-C socket 45 include the same circuit functions of the power-on control circuit 41 and the USBType-C socket 43. Therefore, the portable power source apparatus 4 can support two external dual-purpose devices (the external dual-purpose device 40 and the external dual-purpose device 47) at the same time. For example, the mobile power supply apparatus 4 may simultaneously receive power from the external dual-purpose terminal apparatus 40 and the external dual-purpose terminal apparatus 47, simultaneously supply power to the external dual-purpose terminal apparatus 40 and the external dual-purpose terminal apparatus 47, receive power from the external dual-purpose terminal apparatus 40 and supply power to the external dual-purpose terminal apparatus 47, or receive power from the external dual-purpose terminal apparatus 47 and supply power to the external dual-purpose terminal apparatus 40.
In the embodiment, compared to the mobile power device 2, the mobile power device 4 further includes a bridge transistor 420, a diode D41 and a diode D42. The microcontroller 42 is electrically connected to the gate of the bridge transistor 420. The microcontroller 42 operates the bridge transistor 420 to determine whether to interwork VBUS between the external dual-purpose device 40 and the external dual-purpose device 47. The diode D41 and the diode D42 function to: when the bridge transistor 420 is not turned on, the power sources of the two sides (the external dual-purpose device 40 and the external dual-purpose device 47) are prevented from being communicated with each other, thereby protecting the devices on the two sides.
In the present embodiment, if the bridge transistor 420 is used as a bridge board and one of the external dual-purpose device 40 and the external dual-purpose device 47 is used as a downstream device (Source), the microcontroller 42 obtains a stable power when the downstream device (Source) is connected to the portable power device 4. At this time, the bridge transistor 420 is turned on.
In the present embodiment, if the external dual-purpose device 40 is used as the upstream device (Sink) and the power supply device 4 is connected, the microcontroller 42 only obtains the power for the sustain operation but does not turn on the bridge transistor 420. Until a Source is connected to the mobile power supply 4 to establish a stable power supply, the microcontroller 42 turns on the bridge transistor 420, and converts the external dual-purpose device from a Sink to a Source to supply power.
The present invention has been disclosed in terms of preferred embodiments, so that those skilled in the art can more clearly understand the contents of the present invention. However, those skilled in the art should appreciate that they can readily use the present invention as a basis for designing or modifying processes and methods for operating different power-on control circuits and portable power source devices utilizing the same for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Therefore, the protection scope of the present invention is subject to the claims.
Claims (13)
1. A power-on control circuit connectable to a dual-purpose device through a first usb Type-C connection for maintaining a microcontroller in a power-on state, the power-on control circuit comprising:
a pull-down resistor having a first end and a second end, the first end being electrically connected to a configuration channel pin of the first USB Type-C connection end; a pull-down switch electrically connected to the second end of the pull-down resistor and a ground node, respectively; and
the enabling device is connected with a first switch and the configuration channel pin;
when the enabling device receives a voltage detection signal transmitted by the dual-purpose end device through the configuration channel pin, the enabling device conducts the first switch to enable a first pull-down resistor to be grounded, so that the dual-purpose end device can detect the first pull-down resistor through the configuration channel pin and further supply power to the microcontroller through a power supply pin, and the microcontroller is kept in a power-on state.
2. The power-on control circuit according to claim 1, further comprising a pull-up resistor coupled between the configuration channel pin and the microcontroller; wherein, this enabling device includes: the first diode and the first capacitor, the anode and the cathode of the first diode are respectively coupled with the configuration channel pin and a control end of the pull-down switch, and the first capacitor is connected with the control end and the grounding node.
3. The power-on control circuit of claim 2, further comprising a first resistor coupled to the configuration channel pin and the anode of the first diode, respectively.
4. The power-on control circuit according to claim 1, wherein the voltage detection signal is a square wave signal.
5. The power-on control circuit of claim 2, wherein the dual-purpose device switches to a downlink device when the pull-down resistor is detected by the dual-purpose device.
6. A mobile power supply apparatus comprising:
a first USB Type-C connection terminal including a first configuration channel pin and a first power supply pin;
a microcontroller coupled to the first configuration channel pin and the first power supply pin, respectively; and
the first power-on control circuit can be connected with a dual-purpose end device through the first universal serial bus Type-C connecting end;
the first power-up control circuit includes:
a first pull-down resistor having a first end and a second end, the first end being electrically connected to the first configuration channel pin;
a first pull-down switch electrically connected to the second end of the first pull-down resistor and a ground node, respectively; and
the enabling device is connected with a first switch and the first configuration channel pin;
when the enabling device receives a first voltage detection signal transmitted by the dual-purpose end device through the first configuration channel pin, the enabling device conducts the first switch to enable the first pull-down resistor to be grounded, so that the dual-purpose end device can detect the first pull-down resistor through the first configuration channel pin and further supply power to the microcontroller of the mobile power supply device through a first power supply pin, and the microcontroller is kept in a power-on state.
7. The portable power supply apparatus according to claim 6, wherein the first power-up control circuit further comprises a pull-up resistor coupled between the first configuration channel pin and the microcontroller; wherein, this enabling device includes: the first diode and the first capacitor, the anode and the cathode of the first diode are respectively coupled with the first configuration channel pin and a control end of the pull-down switch, and the first capacitor is connected with the control end and the grounding node.
8. The mobile power supply apparatus of claim 6, further comprising:
a battery connected to the microcontroller; and
and the display device is connected to the microcontroller, and when the microcontroller is in the power-on state, the microcontroller displays the electric quantity level of the battery on the display device.
9. The portable power supply apparatus according to claim 7, wherein the first power-up control circuit further comprises a first resistor coupled to the first configuration channel pin and the anode of the first diode, respectively.
10. The mobile power supply apparatus according to claim 6, wherein the first voltage detection signal is a square wave signal.
11. The mobile power device as claimed in claim 7, wherein when the dual-purpose device detects the first pull-down resistor, the dual-purpose device switches to a downlink device.
12. The mobile power supply apparatus of claim 6, further comprising:
the second universal serial bus Type-C connecting end comprises a second configuration channel pin and a second power supply pin;
a second power-up control circuit comprising:
a second pull-down resistor, wherein the second pull-down resistor has a third end and a fourth end, and the third end is electrically connected to the second configuration channel pin;
a second pull-down switch electrically connected to the fourth terminal of the second pull-down resistor and the ground node, respectively; and
the second enabling device is connected with a second switch and the second configuration channel pin;
when the second enabling device receives a second voltage detection signal transmitted by a connected second dual-purpose end device through the second configuration channel pin, the second enabling device conducts the second switch to ground the second pull-down resistor, so that the second dual-purpose end device can detect the second pull-down resistor through the second configuration channel pin, and then power is supplied to the microcontroller of the mobile power supply device through a second power supply pin, and the microcontroller is kept in the power-on state.
13. The mobile power supply apparatus of claim 12, further comprising: a bridge switch coupled between the first power supply pin and the second power supply pin, a third diode having an anode and a cathode respectively connected to the first power supply pin and a power input terminal of the microcontroller, and a fourth diode having an anode and a cathode respectively connected to the second power supply pin and the power input terminal of the microcontroller; one control end of the bridging switch is connected with the microcontroller, and the microcontroller controls the on or off of the bridging switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710173613.9A CN108631377B (en) | 2017-03-22 | 2017-03-22 | Power-on control circuit and mobile power supply device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710173613.9A CN108631377B (en) | 2017-03-22 | 2017-03-22 | Power-on control circuit and mobile power supply device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108631377A CN108631377A (en) | 2018-10-09 |
| CN108631377B true CN108631377B (en) | 2020-09-18 |
Family
ID=63707156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710173613.9A Active CN108631377B (en) | 2017-03-22 | 2017-03-22 | Power-on control circuit and mobile power supply device using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108631377B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI716965B (en) * | 2019-08-14 | 2021-01-21 | 威鋒電子股份有限公司 | Terminal resistor circuit of usb port and operation method thereof |
| CN112333327B (en) * | 2020-11-20 | 2022-01-07 | Oppo广东移动通信有限公司 | Equipment detection method, device, storage medium, electronic equipment, external equipment and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1462014A (en) * | 2002-05-03 | 2003-12-17 | 三星电子株式会社 | Integral circuit device with multiple communication model and its operation method |
| CN105471591A (en) * | 2015-12-30 | 2016-04-06 | 浙江光大通信设备有限公司 | POE power supply system and power supply method |
| CN105576766A (en) * | 2016-02-18 | 2016-05-11 | 矽力杰半导体技术(杭州)有限公司 | Automatic load detection circuit and mobile power supply applying the circuit |
| CN105630724A (en) * | 2016-01-27 | 2016-06-01 | 深圳慧能泰半导体科技有限公司 | USB Type-C system control circuit |
-
2017
- 2017-03-22 CN CN201710173613.9A patent/CN108631377B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1462014A (en) * | 2002-05-03 | 2003-12-17 | 三星电子株式会社 | Integral circuit device with multiple communication model and its operation method |
| CN105471591A (en) * | 2015-12-30 | 2016-04-06 | 浙江光大通信设备有限公司 | POE power supply system and power supply method |
| CN105630724A (en) * | 2016-01-27 | 2016-06-01 | 深圳慧能泰半导体科技有限公司 | USB Type-C system control circuit |
| CN105576766A (en) * | 2016-02-18 | 2016-05-11 | 矽力杰半导体技术(杭州)有限公司 | Automatic load detection circuit and mobile power supply applying the circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108631377A (en) | 2018-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10545550B2 (en) | Power-up control circuit and mobile power bank | |
| CN106291210B (en) | USB interface detector, USB interface detection method, USB connector and electronic equipment | |
| CN107491159B (en) | Low power implementation of Type-C connector subsystem | |
| US9129065B2 (en) | USB device and control method thereof | |
| US10181742B2 (en) | Electronic device, charger within the electronic device, and detecting method for detecting abnormal status of connector of electronic device | |
| US10658860B2 (en) | Electronic device, charger within the electronic device, and detecting method for detecting abnormal status of connector of electronic device | |
| US20110016334A1 (en) | Auto-Detect Polling for Correct Handshake to USB Client | |
| US8769317B2 (en) | USB hub for supplying power upon determination whether a USB device is chargeable according to data transfer rate of the USB device | |
| US10042801B2 (en) | System for detecting universal serial bus (USB) device and method thereof | |
| US10198320B2 (en) | Power-loss protection | |
| US9904642B2 (en) | Detection circuit of universal serial bus | |
| US20130181660A1 (en) | Charge control circuit for usb device | |
| US20070075680A1 (en) | Charging mode control circuit | |
| US9985394B2 (en) | Polarity control for a flat connector | |
| EP2387125A2 (en) | Motherboard with rapid charging handheld multimedia device | |
| US20200067304A1 (en) | Circuit for and method of protecting overvoltage in universal serial bus interface | |
| US8102631B2 (en) | Computer power supply and standby voltage discharge circuit thereof | |
| US9864714B2 (en) | Electronic system for performing recharging and data communication | |
| JP2017033461A (en) | Detection circuit and detection method for reversible cable, and dual roll device of host device using the same | |
| CN108631377B (en) | Power-on control circuit and mobile power supply device using same | |
| US11329438B2 (en) | Device and method of ensuring power delivery in universal serial bus interface | |
| US10193286B2 (en) | Electronic device and control method thereof | |
| US20150325960A1 (en) | Universal serial bus interface and mobile device | |
| US20160233624A1 (en) | Electronic device and charging interface | |
| US10754805B1 (en) | USB adapter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |