Test circuit

Abstract

The utility model relates to the technical field of test circuits, in particular to a test circuit, which comprises a charging module and a working module, and the charging module and the working module are both electrically connected with a charging power supply. The charging module is used for performing information interaction with a charging power supply and supplying power to the working module at the same time; and the working module is used for charging the rechargeable battery BAT and performing voltage reduction output on the charging power supply. According to the test circuit, the working module and the charging power supply are communicated through the charging module, power supply safety can be improved, the test circuit can serve as a communication bridge between the working module and the charging power supply, information exchange is improved, and meanwhile the working module carries out centralized management on integrated charging and voltage reduction discharging; therefore, under-voltage protection, short-circuit protection and over-temperature protection are achieved at the same time, and the overall safety and universality of the circuit are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of test circuits, in particular to a test circuit. Background Art

[0002] Generally, to improve the reliability of memory chips (also called integrated circuits), memory chips need to undergo a series of tests before leaving the factory, such as testing the function and timing of the memory chips, testing whether the voltage generated by the voltage generating module in the memory chip is accurate, and adjusting the voltage or resistance by testing some circuits in the memory chip.

[0003] During these tests, it is necessary to power different devices in real time according to different voltage requirements. However, due to different equipment requirements, their voltage requirements are also different. Therefore, during the test process, a device that can charge and discharge in real time is needed to meet the use requirements of different test equipment. Utility Model Content

[0004] The purpose of the utility model is to provide a test circuit to solve the problems raised in the above background technology.

[0005] The technical solution of the utility model is: a test circuit, comprising a charging module and a working module, wherein the charging module and the working module are both electrically connected to a charging power source;

[0006] The charging module is used to exchange information with the charging power source and supply power to the working module at the same time;

[0007] The working module is used to charge the rechargeable battery BAT and simultaneously step down the voltage of the charging power supply for output.

[0008] Furthermore, the charging module includes a chip TYPE-C, the VBUS port of the chip TYPE-C is electrically connected to the charging power supply and the working module through an RC filter, the CC2 port of the chip TYPE-C is grounded through a resistor R1, the CC1 port of the chip TYPE-C is grounded through a resistor R2, and the GND port and EH port of the chip TYPE-C are both grounded.

[0009] Furthermore, the RC filter includes a resistor R4 and a bypass capacitor, the resistor R4 is electrically connected to the bypass capacitor, and the resistor R4 is electrically connected to the VBUS port of the chip TYPE-C, and the bypass capacitor is electrically connected to the charging power supply.

[0010] Furthermore, the working module includes a chip U1, an ISET port of the chip U1 is electrically connected to a resistor R3, a BAT port of the chip U1 is electrically connected to a rechargeable battery BAT, a SW port of the chip U1 is electrically connected to a charging power supply and a power output port, and the resistor R3, a GND port of the chip U1 and an EP port are all grounded.

[0011] Furthermore, the positive electrode of the rechargeable battery BAT is electrically connected to the capacitor C1, the anode of the light emitting diode LED and the BAT port of the chip U1, the negative electrode of the rechargeable battery BAT is electrically connected to the capacitor C1, and the capacitor C1 and the negative electrode of the rechargeable battery BAT are both grounded, and the cathode of the light emitting diode LED is electrically connected to the LED port of the chip U1.

[0012] Furthermore, the charging power supply is connected in parallel with the power output port, and the charging power supply and the power output port are electrically connected to the inductor L1 and the capacitor C2, the inductor L1 is electrically connected to the SW port and the NC port of the chip U1, the capacitor C2 is electrically connected to the AP / OUT port and the NC port of the chip U1, and the capacitor C2 is grounded.

[0013] The utility model provides a test circuit through improvement, which has the following improvements and advantages compared with the prior art:

[0014] The test circuit of the utility model connects the working module and the charging power supply through the charging module, which can not only improve the power supply safety, but also serve as a communication bridge between the working module and the charging power supply to improve information exchange. At the same time, the working module centrally manages the integrated charging and step-down discharge, so that it has undervoltage protection, short-circuit protection and over-temperature protection at the same time, which greatly improves the overall safety and versatility of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a circuit connection diagram of the charging module of the utility model;

[0018] Figure 3 It is a circuit connection diagram of the working module of the utility model. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not require further detailed discussion and description in the description of the subsequent drawings.

[0023] refer to Figure 1-Figure 3 This embodiment provides a test circuit, which includes a charging module and a working module. The charging module and the working module are both electrically connected to the charging power supply. Specifically, the charging module serves as a communication bridge between the working module and the charging power supply, that is, the charging module is used to exchange information with the charging power supply, so that the working module can exchange information with the charging power supply through the charging module, that is, send a charging request to the charging power supply. Furthermore, the working module can not only charge the rechargeable battery BAT, but also step down the charging power supply, and further output the charging power supply after the step-down conversion.

[0024] In this embodiment, the charging module includes a chip TYPE-C. The VBUS port of the chip TYPE-C is electrically connected to the charging power supply and the working module through an RC filter. Specifically, the RC filter includes a resistor R4 and a bypass capacitor, the resistor R4 is electrically connected to the bypass capacitor, and the resistor R4 is electrically connected to the VBUS port of the chip TYPE-C, and the bypass capacitor is electrically connected to the charging power supply. The RC filter formed by the resistor R4 and the bypass capacitor can reduce the power supply ripple and prevent the peak voltage from breaking through the chip.

[0025] Furthermore, the CC2 port of the chip TYPE-C is grounded through the resistor R1, the CC1 port of the chip TYPE-C is grounded through the resistor R2, and the GND port and EH port of the chip TYPE-C are both grounded. The CC1 port and CC2 port of the chip TYPE-C are used to connect to external devices and carry the communication between the USB and the external device. That is, when the external device needs to be charged, it can send a charging request to the charging power supply through the CC1 port and CC2 port of the chip TYPE-C.

[0026] In this embodiment, the working module includes a chip U1, wherein the ISET port of the chip U1 is electrically connected to the resistor R3, the BAT port of the chip U1 is electrically connected to the rechargeable battery BAT, the SW port of the chip U1 is electrically connected to the charging power supply and the power output port, and the resistor R3, the GND port of the chip U1 and the EP port are all grounded.

[0027] Further, the positive electrode of the rechargeable battery BAT is electrically connected to the capacitor C1, the anode of the light-emitting diode LED and the BAT port of the chip U1, the negative electrode of the rechargeable battery BAT is electrically connected to the capacitor C1, and the capacitor C1 and the negative electrode of the rechargeable battery BAT are both grounded, and the cathode of the light-emitting diode LED is electrically connected to the LED port of the chip U1. Specifically, the state of the light-emitting diode LED will change with the working state of the chip U1. That is, when the chip U1 charges the rechargeable battery BAT, the light-emitting diode LED flashes at a frequency of 1Hz. When the rechargeable battery BAT is fully charged, the light-emitting diode LED is always on. When the chip U1 is in a charging state but not connected to the rechargeable battery BAT, the light-emitting diode LED flashes at a high speed. When the chip U1 is in a discharging state, the light-emitting diode LED is off. When the chip U1 is in a discharging undervoltage state, the light-emitting diode LED flashes 8 times at 1Hz, and then the light-emitting diode LED is off. It is worth noting that the number of flashes of the light-emitting diode LED is not fixed, and it can be changed according to actual use.

[0028] Furthermore, the charging power supply is connected in parallel with the power output port, and the charging power supply and the power output port are electrically connected to the inductor L1 and the capacitor C2, the inductor L1 is electrically connected to the SW port and the NC port of the chip U1, the capacitor C2 is electrically connected to the AP / OUT port and the NC port of the chip U1, and the capacitor C2 is grounded. The charging power supply 5V can output a 1.5V output voltage through the chip U1.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test circuit, characterized in that: It includes a charging module and a working module, and both the charging module and the working module are electrically connected to a charging power source; The charging module is used to exchange information with the charging power source and supply power to the working module at the same time; The working module is used to charge the rechargeable battery BAT and step down the voltage of the charging power supply for output; The charging module includes a chip TYPE-C, a VBUS port of the chip TYPE-C is electrically connected to a charging power source and a working module through an RC filter, a CC2 port of the chip TYPE-C is grounded through a resistor R1, a CC1 port of the chip TYPE-C is grounded through a resistor R2, and a GND port and an EH port of the chip TYPE-C are both grounded; The RC filter includes a resistor R4 and a bypass capacitor, wherein the resistor R4 is electrically connected to the bypass capacitor, and the resistor R4 is electrically connected to the VBUS port of the chip TYPE-C, and the bypass capacitor is electrically connected to the charging power supply; The working module includes a chip U1, an ISET port of the chip U1 is electrically connected to a resistor R3, a BAT port of the chip U1 is electrically connected to a rechargeable battery BAT, a SW port of the chip U1 is electrically connected to a charging power supply and a power output port, and the resistor R3, a GND port of the chip U1 and an EP port are all grounded.

2. A test circuit according to claim 1, characterized in that: The positive electrode of the rechargeable battery BAT is electrically connected to the capacitor C1, the anode of the light emitting diode LED and the BAT port of the chip U1, the negative electrode of the rechargeable battery BAT is electrically connected to the capacitor C1, and the capacitor C1 and the negative electrode of the rechargeable battery BAT are both grounded, and the cathode of the light emitting diode LED is electrically connected to the LED port of the chip U1.

3. A test circuit according to claim 1, characterized in that: The charging power supply is connected in parallel with the power output port, and the charging power supply and the power output port are both electrically connected to the inductor L1 and the capacitor C2, the inductor L1 is electrically connected to the SW port and the NC port of the chip U1, the capacitor C2 is electrically connected to the AP / OUT port and the NC port of the chip U1, and the capacitor C2 is grounded.

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