On-chip power circuit, method and printer

Abstract

The chip power-on circuit, method and printer provided by the embodiment of the application relate to the field of printer chips. The chip power-on circuit comprises a consumable chip and an energy storage capacitor. The consumable chip comprises a power supply pin and an input / output pin. The power supply pin is electrically connected with the power supply of the printer through a bus. The input / output pin is electrically connected with one end of the energy storage capacitor. The other end of the energy storage capacitor is electrically connected with the power supply through the bus. One end of the energy storage capacitor and one input / output pin of the consumable chip are electrically connected. After a preset time length from the power-on moment of the consumable chip, the input / output pin is controlled to be turned on, so that the energy storage capacitor is charged. Therefore, the total current of the bus in the preset time length is the working current of the consumable chip, which is not affected by the charging current of the energy storage capacitor, so that the consumable chip can normally work on the printer.

Description

Technical Field

[0001] This invention relates to the field of printer chips, and more specifically, to a chip power-on circuit, method, and printer. Background Technology

[0002] Most printers are compatible with consumable chips from different manufacturers. To ensure the consumable chip continues to function normally for a certain period after the bus is powered off, a storage capacitor is typically connected in parallel across the power and ground pins of the consumable chip. When the printer is powered on, the power supply charges the storage capacitor simultaneously with the consumable chip's power-on.

[0003] In existing technology, the printer will detect whether the working current of the bus exceeds the preset current threshold in real time within a preset time after each power-on. Since the working current of the bus will increase rapidly during the charging process of the energy storage capacitor, the current of the bus detected by the printer within the preset time may exceed the preset current threshold, causing the printer to report an error.

[0004] Therefore, the above-mentioned chip power-on method may result in many other manufacturers' chips being unable to replace the consumable chips produced by the original manufacturer. Summary of the Invention

[0005] The present invention aims to provide, for example, a chip power-on circuit, method, and printer, by electrically connecting one end of an energy storage capacitor to an input / output pin of a consumable chip, and controlling the input / output pin to conduct after the consumable chip is powered on for a preset time, so as to charge the energy storage capacitor. This ensures that the total current of the bus within the preset time is the operating current of the consumable chip, and is not affected by the charging current of the energy storage capacitor, thereby ensuring that the consumable chip can work normally in the printer.

[0006] To achieve the above objectives, the technical solutions adopted in the embodiments of the present invention are as follows:

[0007] In a first aspect, embodiments of the present invention provide a chip power-on circuit, characterized in that the chip power-on circuit includes a consumable chip and an energy storage capacitor, the consumable chip includes a power supply pin and an input / output pin, the power supply pin is electrically connected to the power supply of a printer via a bus, and the input / output pin is electrically connected to one end of the energy storage capacitor, the other end of the energy storage capacitor is electrically connected to the power supply via the bus;

[0008] The consumable chip is used to power on when it receives a power-on signal from the power source;

[0009] The consumable chip is also used to control the input / output pins to be turned on after a preset time from the moment of power-on, so as to charge the energy storage capacitor, wherein the energy storage capacitor is used to supply power to the consumable chip when the power supply stops supplying power to the consumable chip.

[0010] In one possible implementation, there are N input / output pins, and the chip power-on circuit further includes N-1 resistors. The N-1 resistors are electrically connected between two adjacent input / output pins, and the N-1 resistors and the energy storage capacitor are connected in series between the bus and the Nth input / output pin.

[0011] The consumable chip is also used to control the target input / output pin to be turned on after a preset time from the moment of power-on, so as to charge the energy storage capacitor; wherein the target input / output pin is any one of the input / output pins, and if at least one resistor is connected in series between the target input / output pin and the energy storage capacitor, the at least one resistor is used to limit the charging current of the energy storage capacitor.

[0012] In one possible implementation, the chip power-on circuit further includes a diode connected to the bus, wherein the anode of the diode is electrically connected to the power supply and the cathode is electrically connected to the power supply pin; one end of the energy storage capacitor is electrically connected to the input / output pin and the other end is electrically connected to the cathode of the diode.

[0013] The diode is used to prevent current from flowing from the energy storage capacitor to the power source when the energy storage capacitor supplies power to the consumable chip.

[0014] In one possible implementation, the chip power-on circuit further includes a current sensing element and a controller. The current sensing element is electrically connected between the anode of the diode and the power supply, and the current sensing element is also electrically connected to the controller, which is also electrically connected to the power supply.

[0015] The controller is used to acquire the input current collected by the current detection element in real time within a preset time period from the moment of power-on, and control the power supply to stop outputting current when the input current exceeds a preset current threshold.

[0016] Secondly, embodiments of the present invention also provide a chip power-on method, applied to a chip power-on circuit, the chip power-on circuit including a consumable chip and an energy storage capacitor, the consumable chip including a power supply pin and an input / output pin, the power supply pin being electrically connected to the power supply of a printer via a bus, and the input / output pin being electrically connected to one end of an energy storage capacitor, the other end of the energy storage capacitor being electrically connected to the power supply via the bus;

[0017] The method includes:

[0018] The consumable chip powers on when it receives a power-on signal from the power source.

[0019] After a preset time following power-on, the consumable chip controls the input / output pins to be turned on, thereby charging the energy storage capacitor. The energy storage capacitor is used to supply power to the consumable chip when the power supply stops supplying power to the consumable chip.

[0020] In one possible implementation, there are N input / output pins, and the chip power-on circuit further includes N-1 resistors. The N-1 resistors are electrically connected between two adjacent input / output pins, and the N-1 resistors and the energy storage capacitor are connected in series between the bus and the Nth input / output pin.

[0021] The step of controlling the input / output pins to conduct after a preset time from power-on, as described in the consumable chip, includes:

[0022] After a preset time following power-on, the consumable chip controls the target input / output pin to be turned on; wherein, the target input / output pin is any one of the input / output pins, and if at least one resistor is connected in series between the target input / output pin and the energy storage capacitor, the at least one resistor is used to limit the charging current of the energy storage capacitor.

[0023] In one possible implementation, the chip power-on circuit further includes a diode connected to the bus, the anode of the diode being electrically connected to a power supply, the cathode of the diode being electrically connected to a power supply pin of the consumable chip, and the cathode of the diode being electrically connected in sequence to the energy storage capacitor and the input / output pin.

[0024] After the step of controlling the input / output pins to conduct and charge the energy storage capacitor after a preset time period from the power-on time of the consumable chip, the method further includes:

[0025] When the energy storage capacitor supplies power to the consumable chip, the diode prevents current from flowing from the energy storage capacitor to the power source.

[0026] In one possible implementation, the chip power-on circuit further includes a current sensing element and a controller. The current sensing element is electrically connected between the anode of the diode and the power supply, and the current sensing element is also electrically connected to the controller, which is also electrically connected to the power supply.

[0027] After the step of powering on the consumable chip upon receiving a power-on signal from the power source, the method further includes:

[0028] The controller acquires the input current collected by the current detection element in real time within a preset period of time from the moment of power-on, and controls the power supply to stop outputting current when the input current exceeds a preset current threshold.

[0029] In one possible implementation, the step of controlling the target input / output pin of the consumable chip to be turned on includes:

[0030] The consumable chip adjusts the state of the target input / output pin from input to output, and sets the level of the target input / output pin to low level, so that the target input / output pin outputs a low level and is connected to ground.

[0031] Thirdly, embodiments of the present invention also provide a printer, including the aforementioned chip power-on circuit.

[0032] Compared to existing technologies, this invention provides a chip power-on circuit, method, and printer. The chip power-on circuit includes a consumable chip and an energy storage capacitor. The consumable chip includes a power pin and an input / output pin. The power pin is electrically connected to the printer's power supply via a bus, and the input / output pin is electrically connected to one end of the energy storage capacitor. The other end of the energy storage capacitor is electrically connected to the power supply via a bus. By electrically connecting one end of the energy storage capacitor to one input / output pin of the consumable chip, and controlling the input / output pin to conduct after the consumable chip is powered on for a preset time, the energy storage capacitor is charged. This ensures that the total current of the bus within the preset time is the operating current of the consumable chip, unaffected by the charging current of the energy storage capacitor, thereby guaranteeing that the consumable chip can work normally in the printer. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A circuit diagram of the chip power-on circuit provided for existing technology.

[0035] Figure 2 This is one of the circuit diagrams for a chip power-on circuit provided in an embodiment of the present invention.

[0036] Figure 3 This is a second circuit diagram of a chip power-on circuit provided in an embodiment of the present invention.

[0037] Figure 4The third circuit diagram of a chip power-on circuit provided in this embodiment of the invention.

[0038] Figure 5 This is a schematic flowchart of a chip power-on method provided in an embodiment of the present invention.

[0039] Icons: 10, 20, 30, 40 - Chip power-on circuit; 21 - Consumable chip; 22 - Bus; 41 - Current detection element; 42 - Controller. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0044] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0045] Existing printers are generally compatible with consumable chips from different manufacturers. To ensure the consumable chip functions properly, it is typically powered on via a chip power-on circuit. A circuit diagram of a traditional chip power-on circuit 10 is shown below. Figure 1 As shown, the power supply pin of the consumable chip is electrically connected to the printer's power supply via a bus, and the energy storage capacitor is connected in parallel between the power supply pin and the ground pin of the consumable chip. When the printer's power supply outputs current through the bus, the energy storage capacitor begins to charge. During the charging process, the printer's power supply output power is additionally consumed, resulting in an increase in the bus current.

[0046] Therefore, within the preset time period for the printer to detect the current of the bus, a rapid increase in the bus current will be detected. When the current exceeds the preset current threshold, the printer will report an error, causing the consumable chip to malfunction.

[0047] To address the aforementioned issues, this embodiment provides a chip power-on circuit. By electrically connecting one end of an energy storage capacitor to an input / output pin of the consumable chip, and controlling the input / output pin to conduct after a preset power-on time for the consumable chip, the energy storage capacitor is charged. This ensures that the total current of the bus within the preset time is the operating current of the consumable chip, unaffected by the charging current of the energy storage capacitor, thereby guaranteeing that the consumable chip can work normally on the printer.

[0048] Please refer to Figure 2 , Figure 2 The circuit diagram of the chip power-on circuit 20 provided in this embodiment is shown. The chip power-on circuit 20 includes a consumable chip 21 and an energy storage capacitor C. The consumable chip 21 includes a power supply pin VCC and an input / output pin IO1. The power supply pin VCC is electrically connected to the power supply of the printer through a bus 22, and the input / output pin IO1 is electrically connected to one end of the energy storage capacitor C. The other end of the energy storage capacitor C is electrically connected to the power supply through a bus 22.

[0049] Consumable chip, used to power on when a power-on signal is received from the power supply.

[0050] The consumable chip is also used to control the input / output pins to conduct after a preset time from the moment of power-on, so as to charge the energy storage capacitor. The energy storage capacitor is used to supply power to the consumable chip when the power supply stops supplying power to the consumable chip.

[0051] In this embodiment, the consumable chip 21 is used to record the consumable information of the printer. Consumable chips 21 produced by different manufacturers may have different operating currents. Since the energy storage capacitor C is not turned on within a preset time period, the current of the bus is the operating current of the consumable chip. If the operating current is less than the preset current threshold, the consumable chip can work normally on the printer.

[0052] After the energy storage capacitor C is fully charged, if the power supply cannot supply power to the consumable chip 21 due to reasons such as bus communication or bus failure, the energy storage capacitor C can act as a backup power source to supply power to the consumable chip through the power supply pin of the consumable chip, so as to ensure the normal operation of the consumable chip. The size of the energy storage capacitor C can generally be greater than 1uF.

[0053] Compared to existing technologies, the chip power-on circuit provided in this embodiment electrically connects one end of the energy storage capacitor to an input / output pin of the consumable chip, and controls the input / output pin to conduct after the consumable chip is powered on for a preset time, so that the energy storage capacitor is charged. This ensures that the total current of the bus within the preset time is the working current of the consumable chip, and is not affected by the charging current of the energy storage capacitor, thereby ensuring that the consumable chip can work normally on the printer.

[0054] After the energy storage capacitor C has finished charging, if the power supply stops supplying power to the consumable chip 21 due to a fault in bus 22 or other reasons, the energy storage capacitor C will start discharging to supply power to the consumable chip 21 in order to ensure its normal operation. Since one end of the energy storage capacitor C is electrically connected to the power supply pins of the consumable chip 21 and the power supply, the current output by the energy storage capacitor C may flow to the power supply, resulting in current loss from the energy storage capacitor C.

[0055] To address the current loss issue caused by the energy storage capacitor C supplying power to the consumable chip 21, please refer to [link / reference needed]. Figure 2 The chip power-on circuit 20 also includes a diode D connected to the bus 22. The anode of the diode D is electrically connected to the power supply, and the cathode is electrically connected to the power supply pin. One end of the energy storage capacitor C is electrically connected to the input / output pin IO1, and the other end is electrically connected to the cathode of the diode D.

[0056] A diode is used to prevent current from flowing from the energy storage capacitor to the power source when the energy storage capacitor is supplying power to the consumable chip.

[0057] Optionally, when the energy storage capacitor C begins to charge, the current in the energy storage capacitor C will increase rapidly, resulting in an increase in the output current of the power supply. In order to slow down the charging speed of the energy storage capacitor C, that is, to reduce the output current of the power supply, a resistor can be connected in series between the energy storage capacitor C and the input / output pins, thereby reducing the charging current of the energy storage capacitor C.

[0058] On Figure 2 Based on the chip power-on circuit 20 introduced, another chip power-on circuit 30 can be obtained by improving the chip power-on circuit 20.

[0059] Please refer to Figure 3 , Figure 3 The diagram shows another chip power-on circuit 30, which includes a consumable chip 21, a diode D, and an energy storage capacitor C. The consumable chip 21 has N input / output pins, including input / output pins IO1-IO2. N The chip power-on circuit 30 also includes N-1 resistors R1-R. N-1 N-1 resistors are electrically connected between two adjacent input / output pins, for example, resistor R nSerial connected to input / output pins (IO) n and input / output pins (IO) n+1 Between them, N-1 resistors and energy storage capacitor C are connected in series with bus 22 and the Nth input / output pin IO. N between.

[0060] The connection relationships and functions of the same components in the chip power-on circuit 30 as those in the chip power-on circuit 20 have been clearly described above and will not be repeated here.

[0061] The consumable chip is also used to control the target input / output pin to conduct after a preset time from the moment of power-on, so as to charge the energy storage capacitor; wherein, the target input / output pin is any input / output pin, and if at least one resistor is connected in series between the target input / output pin and the energy storage capacitor, the at least one resistor is used to limit the charging current of the energy storage capacitor.

[0062] In this embodiment, the consumable chip 21 can control any one of the input / output pins to be turned on, so as to charge the energy storage capacitor C. For example, if the consumable chip 21 controls the input / output pin IO1 to be turned on, the energy storage capacitor C will start charging. Since there is no resistor to limit the current, the charging current of the energy storage capacitor C is relatively large at this time.

[0063] To reduce the charging current of the energy storage capacitor C, the consumable chip 21 can control the input / output pin IO2 - input / output pin IO N Any one of the target input / output pins is turned on to charge the energy storage capacitor C while simultaneously limiting the current using a resistor connected in series between the energy storage capacitor C and the target input / output pin. For example, consumable chip 21 controls the input / output pin IO. i When the circuit is on, then resistor R1 - resistor R i-1 Used to reduce the charging current of the energy storage capacitor C.

[0064] Optionally, starting from the moment the consumable chip 21 is powered on, the consumable chip 21 will acquire the input current in real time within a preset duration, and control the power supply pin to disconnect if the input current is greater than the preset current threshold.

[0065] exist Figure 3 Based on the chip power-on circuit 30 in the previous paper, the chip power-on circuit 30 was improved to obtain another chip power-on circuit 40.

[0066] Please refer to Figure 4 The chip power-on circuit 40 includes, in addition to Figure 3In addition to the components in the chip power-on circuit 30 shown, the chip power-on circuit 40 may also include a current detection element 41 and a controller 42. The current detection element 41 is electrically connected between the anode of the diode D and the power supply, and the current detection element 41 is electrically connected to the controller 42, which is also electrically connected to the power supply.

[0067] The connection relationships and functions between the same components in the chip power-on circuit 40 and the chip power-on circuit 30 have been described above and will not be repeated here.

[0068] The controller 42 is used to acquire the input current collected by the current detection element 41 in real time within a preset time period from the moment of power-on, and to control the power supply to stop outputting current when the input current exceeds the preset current threshold.

[0069] In this embodiment, the input current refers to the current output by the power supply passing through the bus into the consumable chip 21 and the energy storage capacitor C. Since the energy storage capacitor C has not yet started charging within a preset time period, the input current is equal to the operating current of the energy storage consumable chip 21. If the input current is greater than a preset current threshold, it indicates that the consumable chip 21 cannot work normally on the printer, and the controller 42 controls the power supply to stop outputting current.

[0070] Compared with the prior art, this embodiment has the following beneficial effects:

[0071] First, the chip power-on circuit provided in this embodiment connects one end of the energy storage capacitor to an input / output pin of the consumable chip, and controls the input / output pin to conduct after the consumable chip is powered on for a preset time, so that the energy storage capacitor is charged. This ensures that the total current of the bus within the preset time is the working current of the consumable chip, and is not affected by the charging current of the energy storage capacitor, thus enabling chips from more different manufacturers to work on the printer.

[0072] Then, the chip power-on circuit provided in this embodiment can turn on the input and output pins of the consumable chip by connecting a resistor in series between the energy storage capacitor and the input / output pins, thereby reducing the charging current of the energy storage capacitor.

[0073] In the above Figures 2-4 Based on the chip power-on circuit described above, this embodiment also provides a chip power-on method. Please refer to [link / reference]. Figure 5 The chip power-on method may include the following steps S110-S120.

[0074] S110, the consumable chip is powered on when it receives a power-on signal from the power supply.

[0075] S120: After a preset time following power-on, the consumable chip controls the input / output pins to conduct, thereby charging the energy storage capacitor. The energy storage capacitor is used to supply power to the consumable chip when the power supply stops supplying power to the consumable chip.

[0076] Optionally, there are N input / output pins, and the chip power-on circuit also includes N-1 resistors. The N-1 resistors are electrically connected between two adjacent input / output pins, and the N-1 resistors and the energy storage capacitor are connected in series between the bus and the Nth input / output pin.

[0077] The steps for controlling the input / output pins to conduct after a preset time following power-on of the consumable chip include:

[0078] After a preset time following power-on, the consumable chip controls the target input / output pin to turn on; wherein, the target input / output pin can be any input / output pin, and if at least one resistor is connected in series between the target input / output pin and the energy storage capacitor, then at least one resistor is used to limit the charging current of the energy storage capacitor.

[0079] Optionally, the chip power-on circuit also includes a diode connected to the bus. The anode of the diode is electrically connected to the power supply, the cathode of the diode is electrically connected to the power supply pin of the consumable chip, and the cathode of the diode is also electrically connected to the energy storage capacitor and the input / output pins in sequence.

[0080] After step S120, the chip power-on method further includes the following step S130:

[0081] S130, when the energy storage capacitor is supplying power to the consumable chip, the diode prevents the current from the energy storage capacitor from flowing to the power source.

[0082] Optionally, the chip power-on circuit 40 may also include a current sensing element 41 and a controller 42. The current sensing element 41 is electrically connected between the anode of the diode D and the power supply, and the current sensing element 41 is electrically connected to the controller 42, which is also electrically connected to the power supply.

[0083] After step S110, the chip power-on method may further include the following step S111:

[0084] The controller 42 acquires the input current collected by the current detection element 41 in real time within a preset time period from the moment of power-on, and controls the power supply to stop outputting current when the input current exceeds the preset current threshold.

[0085] Optionally, the steps for controlling the target input / output pins of the consumable chip to be turned on include:

[0086] The consumable chip adjusts the state of the target input / output pin from input to output and sets the level of the target input / output pin to low level, so that the target input / output pin outputs a low level and is connected to ground.

[0087] In this embodiment, the consumable chip includes an MCU (Microcontroller Unit), which stores firmware. The firmware can be used to switch the operating modes of the input / output pins of the consumable chip 21.

[0088] The input / output pins of consumable chip 21 include four operating modes: quasi-bidirectional port mode, push-pull output mode, high-impedance input mode, and open-drain mode. In high-impedance input mode, the input state is active, and no current flows through the input / output pins. Push-pull output mode is active, including output high and low levels. When set to low, the input / output pins are effectively grounded, meaning current flows through the energy storage capacitor C. For example, please refer to [reference needed]. Figure 4 In the chip power-on circuit 40, after a preset time, the consumable chip 21 changes the working mode of the input / output pin IO2 from high-impedance input mode to push-pull output mode and sets the output to low level. At this time, the input / output pin IO2 and the RND pin are turned on, and the energy storage capacitor C begins to charge.

[0089] This embodiment also provides a printer, which includes a chip power-on circuit.

[0090] In summary, the embodiments of the present invention provide a chip power-on circuit, method, and printer. The chip power-on circuit includes a consumable chip and an energy storage capacitor. The consumable chip includes a power supply pin and an input / output pin. The power supply pin is electrically connected to the printer's power supply via a bus, and the input / output pin is electrically connected to one end of the energy storage capacitor. The other end of the energy storage capacitor is electrically connected to the power supply via a bus. By electrically connecting one end of the energy storage capacitor to one input / output pin of the consumable chip, and controlling the input / output pin to conduct after the consumable chip is powered on for a preset time, the energy storage capacitor is charged. This ensures that the total current of the bus within the preset time is the operating current of the consumable chip, unaffected by the charging current of the energy storage capacitor, thereby guaranteeing that the consumable chip can work normally in the printer.

[0091] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A chip power-on circuit, characterized in that, The chip power-on circuit includes a consumable chip and an energy storage capacitor. The consumable chip includes a power pin and an input / output pin. The power pin is electrically connected to the printer's power supply via a bus, and the input / output pin is electrically connected to one end of the energy storage capacitor. The other end of the energy storage capacitor is electrically connected to the power supply via the bus. The consumable chip is used to power on when it receives a power-on signal from the power source; The input / output pins are N, and the chip power-on circuit also includes N-1 resistors. The N-1 resistors are electrically connected between two adjacent input / output pins, and the N-1 resistors and the energy storage capacitor are connected in series between the bus and the Nth input / output pin under the consumable chip. The consumable chip is also used to control the target input / output pin to be turned on after a preset time from the moment of power-on, so as to charge the energy storage capacitor; the energy storage capacitor is used to supply power to the consumable chip when the power supply stops supplying power to the consumable chip; Wherein, the target input / output pin can be any one of the input / output pins, and if at least one resistor is connected in series between the target input / output pin and the energy storage capacitor, then the at least one resistor is used to limit the charging current of the energy storage capacitor; The chip power-on circuit also includes a current sensing element and a controller. The current sensing element is electrically connected between the power supply pin and the power supply, and the current sensing element is also electrically connected to the controller, which is also electrically connected to the power supply. The controller is used to acquire the input current collected by the current detection element in real time within a preset time period from the moment of power-on, and control the power supply to stop outputting current when the input current exceeds a preset current threshold.

2. The chip power-on circuit according to claim 1, characterized in that, The chip power-on circuit also includes a diode connected to the bus, the anode of the diode being electrically connected to the power supply through the current sensing element, and the cathode being electrically connected to the power supply pin; one end of the energy storage capacitor is electrically connected to the input / output pin, and the other end is electrically connected to the cathode of the diode; The diode is used to prevent current from flowing from the energy storage capacitor to the power source when the energy storage capacitor supplies power to the consumable chip.

3. A method for powering on a chip, characterized in that, This is applied to a chip power-on circuit, which includes a consumable chip and an energy storage capacitor. The consumable chip includes a power supply pin and an input / output pin. The power supply pin is electrically connected to the printer's power supply via a bus, and the input / output pin is electrically connected to one end of the energy storage capacitor. The other end of the energy storage capacitor is electrically connected to the power supply via the bus. The method includes: The consumable chip powers on when it receives a power-on signal from the power source. The input / output pins are N, and the chip power-on circuit also includes N-1 resistors. The N-1 resistors are electrically connected between two adjacent input / output pins, and the N-1 resistors and the energy storage capacitor are connected in series between the bus and the Nth input / output pin under the consumable chip. The energy storage capacitor is used to supply power to the consumable chip when the power supply stops supplying power to the consumable chip; After a preset time following power-on, the consumable chip controls the target input / output pins to be turned on, thereby charging the energy storage capacitor; the energy storage capacitor is used to supply power to the consumable chip when the power supply stops supplying power to the consumable chip. Wherein, the target input / output pin can be any one of the input / output pins, and if at least one resistor is connected in series between the target input / output pin and the energy storage capacitor, then the at least one resistor is used to limit the charging current of the energy storage capacitor; The chip power-on circuit also includes a current sensing element and a controller. The current sensing element is electrically connected between the power supply pin and the power supply, and the current sensing element is also electrically connected to the controller, which is also electrically connected to the power supply. The controller is used to acquire the input current collected by the current detection element in real time within a preset time period from the moment of power-on, and control the power supply to stop outputting current when the input current exceeds a preset current threshold.

4. The method according to claim 3, characterized in that, The chip power-on circuit also includes a diode connected to the bus. The anode of the diode is electrically connected to the power supply through the current sensing element, and the cathode of the diode is electrically connected to the power supply pin of the consumable chip. The cathode of the diode is also electrically connected to the energy storage capacitor and the input / output pin in sequence. After the step of controlling the input / output pins to conduct to charge the energy storage capacitor following a preset time period after the consumable chip is powered on, the method further includes: When the energy storage capacitor supplies power to the consumable chip, the diode prevents current from flowing from the energy storage capacitor to the power source.

5. The method according to claim 4, characterized in that, The steps for controlling the target input / output pins of the consumable chip to be turned on include: The consumable chip adjusts the state of the target input / output pin from input to output, and sets the level of the target input / output pin to low level, so that the target input / output pin outputs a low level and is connected to ground.

6. A printer comprising the chip power-on circuit according to any one of claims 1-2.

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