Power supply board card and test machine

Abstract

The utility model relates to a power supply board card and a test machine, the power supply board card comprises more than two slave control modules, each slave control module comprises a plurality of power supply units, after the power supply units are connected in sequence, the power supply unit located at the head end is connected with the input end of the slave control module, and the power supply unit located at the tail end is connected with the output end of the slave control module; and the main control module comprises a change-over switch circuit, and the change-over switch circuit is connected with the input end and the output end of each slave control module and is used for connecting at least two slave control modules. By performing switching control on the change-over switch circuit in the master control module, the at least two slave control modules can be connected, so that cascade power supply by using the power supply units in the different slave control modules is realized, the number of the cascaded power supply units and the magnitude of output current can be adjusted according to actual needs, and the use convenience is improved.

Description

Technical Field

[0001] The present application relates to the field of semiconductor testing technology, and in particular to a power supply board and a testing machine. Background Art

[0002] Semiconductor automated testing refers to the use of automatic test equipment (ATE) to test various parameters of the device under test (DUT) to eliminate defective products and control the factory quality of semiconductor devices. The power board is used in the automatic test equipment to provide voltage or current excitation to the chip under test to achieve functions such as voltage and current measurement.

[0003] Power boards usually use the GANG mode of the DPS (DUT Power Supply) power circuit to provide higher current: the output current capacity is doubled by cascading the DPS power circuit. Traditional power boards can only use high-current GANGs in fixed combinations, which has limitations on the current size and is not easy to use. Utility Model Content

[0004] Based on this, it is necessary to provide a power supply board and a test machine that can improve the convenience of use in order to solve the above problems.

[0005] A first aspect of the present application provides a power board, comprising:

[0006] More than two slave control modules, each of which includes a plurality of power supply units, and after the power supply units are connected in sequence, the power supply unit at the head end is connected to the input end of the slave control module, and the power supply unit at the tail end is connected to the output end of the slave control module;

[0007] The main control module comprises a switching circuit, wherein the switching circuit connects the input end and the output end of each of the slave control modules and is used to connect at least two of the slave control modules.

[0008] In one of the embodiments, in the slave control module, the power supply units are connected in a daisy chain manner; and / or the switching circuit connects at least two of the slave control modules in a star connection manner.

[0009] In one embodiment, the power supply unit includes a power supply chip and a follower; among the power supply units connected in sequence, the power supply chip of the power supply unit located at the head end is connected to the input end of the slave control module, and the follower is connected to the power supply chip in the next power supply unit, and the follower of the power supply unit located at the end is connected to the output end of the slave control module.

[0010] In one embodiment, the slave control module also includes an input follower and an output switching switch; the power chip in the power supply unit located at the head end is connected to the input follower, and is connected to the first moving contact of the output switching switch through the corresponding follower, the input follower is connected to the input end of the slave control module, the second moving contact of the output switching switch is connected to the follower in the power supply unit located at the end, and the static contact of the output switching switch is connected to the output end of the slave control module.

[0011] In one embodiment, the slave control module includes a slave control module FE0, a slave control module FE1, a slave control module FE2 and a slave control module FE3, and the switching circuit includes a switch K1, a switch K2, a switch K3, a switch K5, a switch K6 and a switch K7;

[0012] The first end of the switch K1 is connected to the output end of the slave control module FE0, and the second end of the switch K1 is connected to the input end of the slave control module FE1; the first end of the switch K2 is connected to the output end of the slave control module FE1, and the second end of the switch K2 is connected to the input end of the slave control module FE2; the first end of the switch K3 is connected to the output end of the slave control module FE2, and the second end of the switch K3 is connected to the input end of the slave control module FE3;

[0013] The first end of the switch K5 is connected to the input end of the slave control module FE0, and the second end of the switch K5 is connected to the input end of the slave control module FE1; the first end of the switch K6 is connected to the input end of the slave control module FE1, and the second end of the switch K6 is connected to the input end of the slave control module FE2; the first end of the switch K7 is connected to the input end of the slave control module FE2, and the second end of the switch K7 is connected to the input end of the slave control module FE3.

[0014] In one embodiment, the switching circuit further includes a switch K4, a switch K8, a multiplexer U306 and a multiplexer U307, and the main control module further includes a connector for connecting between power boards;

[0015] The first end of the switch K4 is connected to the output end of the slave control module FE3, the second end of the switch K4 is connected to the static contact of the multiplexer U307, the first end of the switch K8 is connected to the input end of the slave control module FE3, the second end of the switch K8 is connected to the static contact of the multiplexer U307, and the multiple moving contacts of the multiplexer U307 are respectively connected to the corresponding pins of the connector; the static contact of the multiplexer U306 is connected to the input end of the slave control module FE0, and the multiple moving contacts of the multiplexer U306 are respectively connected to the corresponding pins of the connector.

[0016] A second aspect of the present application provides a testing machine, comprising the above-mentioned power board.

[0017] In one of the embodiments, the testing machine further includes a chassis and a backplane, wherein the backplane and more than two power supply boards are arranged in the chassis, and each of the power supply boards is connected via the backplane.

[0018] In one of the embodiments, the testing machine further includes a control module disposed in the chassis, and the control module is connected to each of the power supply boards via the backplane.

[0019] In one embodiment, the number of the chassis is more than two, and the control modules in each chassis are connected to each other.

[0020] The above-mentioned power supply board and test machine can connect at least two slave control modules by switching and controlling the switching switch circuit in the main control module, thereby realizing cascade power supply using power supply units in different slave control modules. The number of cascaded power supply units can be adjusted according to actual needs, and the output current can be adjusted, thereby improving convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural block diagram of a power board in one embodiment;

[0022] Figure 2 is a structural schematic diagram of a slave control module in one embodiment;

[0023] Figure 3 A schematic diagram of the structure of a power board in one embodiment;

[0024] Figure 4 A structural schematic diagram of a testing machine in one embodiment;

[0025] Figure 5 FIG. 4 is a structural schematic diagram of a testing machine in another embodiment. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0028] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0029] When used herein, the singular forms "a", "an", and "the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0030] In one embodiment, Figure 1 As shown, a power board is provided, including a main control module BE and more than two slave control modules FE, the slave control module FE includes a plurality of power supply units 110, after each power supply unit 110 is connected in sequence, the power supply unit 110 located at the head end is connected to the input end of the slave control module FE, and the power supply unit 110 located at the end is connected to the output end of the slave control module FE; the main control module BE includes a switching circuit 120, the switching circuit 120 connects the input end and the output end of each slave control module FE, and is used to connect at least two slave control modules FE.

[0031] In the slave control module FE, each power supply unit 110 may be connected in a daisy chain manner, and the switching circuit 120 may connect at least two slave control modules 110 in a star connection manner. In the GANG mode of the power board, a combination of daisy chain and star connection is used for connection, which can ensure performance while also allowing for flexible combination to meet user needs. Among them, the number of slave control modules FE is not unique, for example, including slave control module FE0, slave control module FE1, slave control module FE2, etc., according to actual needs, the switch in the switching switch circuit 120 can be switched and controlled by an external controller, and all or part of the power supply units 110 in the slave control module FE are selected for cascading. The external controller can be FPGA (Field-Programmable Gate Array), MCU (Microcontroller Unit), etc. In the cascaded power supply units 110, the power supply chip in the power supply unit 110 located at the head end serves as the host, and the power supply chips in other power supply units 110 serve as slaves. The output current of the host is applied to all slaves. If the power supply chip is a current expansion chip, the current of all slaves to the host is superimposed and expanded one by one. The structure of each power supply unit 110 in the slave control module FE is not unique, and may specifically include a power supply chip and a follower; among the power supply units 110 connected in sequence, the power supply chip of the power supply unit 110 located at the head end is connected to the input end of the slave control module FE, and the follower is connected to the power supply chip in the next power supply unit 110, and the follower of the power supply unit 110 located at the end is connected to the output end of the slave control module FE.

[0032] like Figure 2 As shown, taking the slave control module FE0 as an example, the slave control module FE0 includes a total of 32 power supply units 110, and the power chips / followers in each power supply unit 110 are respectively power supply chip DPSIC_0 / follower U1, power supply chip DPSIC_1 / follower U2, ..., power supply chip DPSIC_31 / follower U32. The power supply chip DPSIC_0 is connected to the input terminal IN0 of the slave control module FE0, and is connected to the power supply chip DPSIC_1 through the follower U1. The power supply chip DPSIC_1 is connected to the power supply chip DPSIC_2 through the follower U2, ..., and the power supply chip DPSIC_31 is connected to the output terminal OUT0 of the slave control module FE0 through the follower U32.

[0033] Among them, each power chip has a current expansion function. For example, the power chip DPSIC_0 outputs 1A current, and after passing through the power chip DPSIC_1, it outputs 2A current. A follower is set between each power chip to increase the load capacity of the GANG host and slave and enhance the GANG channel performance (enhance the GANG signal driving capability). The follower can sample the operational amplifier. In a power unit 110, the in-phase input terminal of the follower is connected to the corresponding power chip, and the inverting input terminal of the follower is connected to the output terminal of the follower. The output terminal of the follower is connected to the output terminal OUT0 of the power chip / slave control module FE0 in the next power unit 110. In a single slave control module FE0, 32 channels can be GANGed continuously at will. The following examples illustrate the connection methods of several GANG modes in the slave control module FE0:

[0034] The power chip DPSIC_0 is the host, which can GANG the power chip DPSIC_1 and GANG 2 channels; the connection relationship of the GANG signal is: the output of the power chip DPSIC_0 enters the power chip DPSIC_1 through the follower U1, using a daisy chain connection method.

[0035] The power chip DPSIC_0 is the host, which can GANG the power chip DPSIC_1, the power chip DPSIC_2, and GANG 3 channels; the connection relationship of the GANG signal is: the output of the power chip DPSIC_0 enters the power chip DPSIC_1 through the follower U1, and the output of the power chip DPSIC_1 is given to the power chip DPSIC_2 through the follower U2, using a daisy chain connection method.

[0036] The power chip DPSIC_0 is the host, which can GANG the power chip DPSIC_1, the power chip DPSIC_2, and the power chip DPSIC_3, GANG 4 channels; the connection relationship of the GANG signal is: the output of the power chip DPSIC_0 enters the power chip DPSIC_1 through the follower U1, the output of the power chip DPSIC_1 is given to the power chip DPSIC_2 through the follower U2, and the output of the power chip DPSIC_2 is given to the power chip DPSIC_3 through the follower U3, using a daisy chain connection method.

[0037] The power chip DPSIC_1 is the host, which can GANG power chip DPSIC_2, power chip DPSIC_3, and power chip DPSIC_4, GANG 4 channels; the connection relationship of the GANG signal is: the output of the power chip DPSIC_1 is given to the power chip DPSIC_2 via follower U2, the output of the power chip DPSIC_2 is given to the power chip DPSIC_3 via follower U3, and the output of the power chip DPSIC_3 is given to the power chip DPSIC_4 via follower U4, using a daisy chain connection method.

[0038] Furthermore, the slave control module PE also includes an input follower and an output switching switch; the power chip in the power supply unit 110 located at the head end is connected to the input follower, and is connected to the first moving contact of the output switching switch through the corresponding follower, the input follower is connected to the input end of the slave control module PE, the second moving contact of the output switching switch is connected to the follower in the power supply unit 110 located at the end, and the static contact of the output switching switch is connected to the output end of the slave control module PE.

[0039] like Figure 2 As shown, taking the slave control module FE0 as an example, the slave control module FE0 also includes an input follower U0 and an output switching switch K9. The input follower U0 can also use an input operational amplifier. The in-phase input end of the input follower U0 is connected to the input end IN0 of the slave control module PE0, and the inverting input end of the input follower U0 is connected to the output end of the input follower U0. The output end of the input follower U0 is connected to the power chip DPSIC_0 in the power unit 110 located at the head end. The first moving contact of the output switching switch K9 is connected to the output end of the follower U1 in the power unit 110 located at the head end, the second moving contact of the output switching switch K9 is connected to the output end of the follower U32 in the power unit 110 located at the end, and the static contact of the output switching switch K9 is connected to the output end OUT0 of the slave control module PE0. Similarly, the output switching switch K9 can be controlled by an external controller according to actual needs to change the connection relationship between the slave control module FE0 and the outside.

[0040] The above-mentioned power board can connect at least two slave control modules FE by switching and controlling the switching switch circuit 120 in the main control module BE, thereby realizing cascade power supply using the power supply units 110 in different slave control modules FE. The number of cascaded power supply units 110 can be adjusted according to actual needs, and the output current can be adjusted, thereby improving the convenience of use.

[0041] In one embodiment, Figure 3As shown, the slave control module FE includes a slave control module FE0, a slave control module FE1, a slave control module FE2 and a slave control module FE3, and the switching switch circuit 120 includes a switch K1, a switch K2, a switch K3, a switch K5, a switch K6 and a switch K7. The first end of the switch K1 is connected to the output end OUT0 of the slave control module FE0, and the second end of the switch K1 is connected to the input end IN1 of the slave control module FE1; the first end of the switch K2 is connected to the output end OUT1 of the slave control module FE1, and the second end of the switch K2 is connected to the input end IN2 of the slave control module FE2; the first end of the switch K3 is connected to the output end OUT2 of the slave control module FE2, and the second end of the switch K3 is connected to the input end IN3 of the slave control module FE3. The first end of the switch K5 is connected to the input end IN0 of the slave control module FE0, and the second end of the switch K5 is connected to the input end IN1 of the slave control module FE1; the first end of the switch K6 is connected to the input end IN1 of the slave control module FE1, and the second end of the switch K6 is connected to the input end IN2 of the slave control module FE2; the first end of the switch K7 is connected to the input end IN2 of the slave control module FE2, and the second end of the switch K7 is connected to the input end IN3 of the slave control module FE3. By controlling the switches in the switching circuit 120 through an external controller, the star connection mode between the slave control modules FE can be changed, the output end of the slave control module FE where the host is located is connected to the input end of other slave control modules FE, and the number of GANG channels can be changed.

[0042] Specifically, the slave control module FE0 includes power chips DPSIC_0 to DPSIC_31, and an output switching switch K9; the slave control module FE1 includes power chips DPSIC_32 to DPSIC_63, and an output switching switch 10; the slave control module FE2 includes power chips DPSIC_64 to DPSIC_95, and an output switching switch 11; the slave control module FE3 includes power chips DPSIC_96 to DPSIC_127, and an output switching switch 12. For example, by connecting the follower U1 and the output switching switch K9, if the switches K1, K6, and K7 are closed respectively, the output of the power chip DPSIC_0 can be respectively given to the power chips DPSIC_32, DPSIC_64, and DPSIC_96, and the GANG 64, GANG 96, and GANG128 channels are realized using a star connection method. By changing the connection relationship between different slave control modules FE, you can arbitrarily connect multiple channels in GANG mode. The following examples illustrate the connection methods of several GANG modes between different slave control modules FE:

[0043] The power chip DPSIC_0 is the host, and can GANG power chip DPSIC_1, power chip DPSIC_2, power chip DPSIC_3, ..., power chip DPSIC_33, GANG 34 channels; it is necessary to switch the output switch K9 from the control module FE0 to the follower U32, and then close the switch K1. At this time, the GANG signal is given to the power chip DPSIC_32, using a daisy chain connection method.

[0044] The power chip DPSIC_31 is the host, and can GANG power chip DPSIC_32, power chip DPSIC_33, power chip DPSIC_34, ..., power chip DPSIC_65, GANG 35 channels; it is necessary to switch the output switching switch K9 of the slave control module FE0 to the follower U32, and then close the switch K1; the output switching switch K10 of the slave control module FE1 is switched to the follower at the rear end of the power chip DPSIC_63, and then close the switch K2. At this time, a daisy chain connection method is used inside the slave control module FE0, the slave control module FE1, and the slave control module FE2.

[0045] The power chip DPSIC_0 is the host, and can GANG power chip DPSIC_1, power chip DPSIC_2, power chip DPSIC_3, ..., power chip DPSIC_127, GANG 128 channels; it is necessary to switch the output switch K9 from the control module FE0 to the follower U1, and then close the switch K1, switch K6, and switch K7 respectively, using a star connection method, and give the GANG signal of the power chip DPSIC_0 to the power chip DPSIC_32, power chip DPSIC_64, and power chip DPSIC_96; from inside the control module FE, a daisy chain connection method is used.

[0046] In addition, the power chip DPSIC_32 is the host, and the power chip DPSIC_33, the power chip DPSIC_34, the power chip DPSIC_35, ..., the power chip DPSIC_63 can also be GANG; the power chip DPSIC_63 is the host, and the power chip DPSIC_64, the power chip DPSIC_65, the power chip DPSIC_66, ..., the power chip DPSIC_96 can also be GANG; DPSIC_95 is the host, and the power chip DPSIC_96, the power chip DPSIC_97, the power chip DPSIC_98, ..., the power chip DPSIC_127 can also be GANG.

[0047] In one embodiment, continue to refer to Figure 3The switching switch circuit 120 also includes a switch K4, a switch K8, a multiplexer U306 and a multiplexer U307, and the main control module BE also includes a connector J for connecting between power boards; the first end of the switch K4 is connected to the output end OUT3 of the slave control module FE3, the second end of the switch K4 is connected to the static contact of the multiplexer U307, the first end of the switch K8 is connected to the input end IN3 of the slave control module FE3, the second end of the switch K8 is connected to the static contact of the multiplexer U307, and the multiple moving contacts of the multiplexer U307 are respectively connected to the corresponding pins of the connector J; the static contact of the multiplexer U306 is connected to the input end IN of the slave control module FE0, and the multiple moving contacts of the multiplexer U306 are respectively connected to the corresponding pins of the connector J.

[0048] Specifically, the multiplexer U306 and the multiplexer U307 can be eight-to-one analog switches, and the eight moving contacts are respectively connected to the pins BUS1 to BUS8 of the connector J. The switch K4, the switch K8, the multiplexer U306 and the multiplexer U307 can be controlled by an external controller to change the connection mode between different power boards, thereby connecting the power chips on different power boards to realize a high current GANG across the power boards. Specifically, Figure 3 As shown, for the current power board, if the power chip in the power board is selected as the host, the multiplexer U307 is closed, connected to other power boards through connector J, and the GANG signal is output to other power boards; if the power chip in the power board is selected as the slave, the multiplexer U306 is closed, connected to other power boards through connector J, and the GANG signal is received.

[0049] In one embodiment, a test machine is provided, comprising the above-mentioned power board. Further, the test machine also comprises a chassis and a backplane, wherein the backplane and two or more power boards are arranged in the chassis, and the power boards are connected through the backplane.

[0050] like Figure 4As shown, the power boards in the chassis may include power board 1, power board 2, power board 3, etc. The structures of the main control module BE and the slave control module FE in each power board are the same. The 8 pins of the connector J in each power board are respectively connected through the 8 lines (GANGBUS lines) of the backplane 130. Taking the power chip DPSIC_0 of the power board 1 as the host as an example, the GANG power chip DPSIC_1, the power chip DPSIC_2, the power chip DPSIC_3, ..., the power chip DPSIC_255, the power board 1 and the power board 2, the two boards realize the GANG 256 channels; it is necessary to switch the output switching switch K9 in the slave control module FE0 of the power board 1 to the follower U1, and then close the switches K1, K6, K7 and K8 on the main control module BE; the multiplexer U307 selects a group of GANGBUS lines of the backplane 130 to connect with the power board 2 (the backplane has 8 groups of GANGBUS lines connected to the connector J of the power board); at this time, the multiplexer U306 of the power board 2 is connected to the power board 1 through a group of GANGBUS lines of the backplane 130 (for example, the multiplexers U307 of the power board 1 and the multiplexers U306 of the power board 2 are both switched to connect with the pin BUS1 of the connector J); the connection method across the power board is the same as the GANG principle across the slave control module FE (FE0, FE1, FE2, FE3) within the single power board, so that the connection of the GANG signal across the power board is realized. GANG 256 is exactly the GANG channel of 8 slave control modules FE, so a star connection method is used, and the GANG in the slave control module FE uses a daisy chain connection method.

[0051] By switching and controlling the switches and multiplexers in the main control module BE, GANG multi-channels across power boards can be realized. The following examples illustrate the connection methods of several GANG modes between different power boards:

[0052] The power chip DPSIC_0 of the power board 1 is the host, and can GANG the power chip DPSIC_1, the power chip DPSIC_2, the power chip DPSIC_3, ..., the power chip DPSIC_255. The power board 1 and the power board 2, the two boards realize GANG 256 channels.

[0053] The power chip DPSIC_0 of the power board 2 is the host, and can GANG the power chip DPSIC_1, the power chip DPSIC_2, the power chip DPSIC_3, ..., the power chip DPSIC_255, the power board 2 and the power board 3, and the two boards realize GANG 256 channels.

[0054] The power chip DPSIC_0 of the power board 1 is the host, and can GANG power chip DPSIC_1, power chip DPSIC_2, power chip DPSIC_3, ..., power chip DPSIC_383, power board 1, power board 2 and power board 3, 3 boards can realize GANG 384 channels.

[0055] The power chip DPSIC_0 of the power board 1 is the host, and the power chip DPSIC_1, the power chip DPSIC_2, the power chip DPSIC_3, ..., the power chip DPSIC_511 can be GANG, the power board 1, the power board 2, the power board 3 and the power board 4, and the four boards can realize GANG 512 channels.

[0056] The power chip DPSIC_0 of the power board 1 is the host, and can GANG power chip DPSIC_1, power chip DPSIC_2, power chip DPSIC_3, ..., power chip DPSIC_639, power board 1, power board 2, power board 3, power board 4 and power board 5, 5 boards can realize GANG 640 channels.

[0057] The power chip DPSIC_0 of the power board 1 is the host, and can GANG power chip DPSIC_1, power chip DPSIC_2, power chip DPSIC_3, ..., power chip DPSIC_767, power board 1, power board 2, power board 3, power board 4, power board 5 and power board 6, 6 boards can realize GANG 768 channels.

[0058] In one embodiment, the test machine further includes a control module disposed in the chassis, and the control module is connected to each power board through a backplane. Figure 5 As shown, the number of chassis is more than two, and the control modules CTI in each chassis are connected to each other. Taking the chassis including chassis 1 and chassis 2 as an example, chassis 1 and chassis 2 both include 8 power boards, and the control modules CTI in chassis 1 and chassis 2 can be connected to each power board in the chassis through a group of GANGBUS lines on the backplane in the chassis, and the control module CTI in chassis 1 is connected to the control module CTI in chassis 2 by using this group of GANGBUS lines. Taking the power chip DPSIC_0 as the host as an example, the power chip DPSIC_1, power chip DPSIC_2, power chip DPSIC_3, ..., power chip DPSIC_1023 can be GANGed, and 1024 channels (GANGed 8 power boards) can be GANGed; the cross-chassis GANG and cross-power board GANG principles are the same, and the GANG signals of each power board are connected using star connection and daisy chain.

[0059] Through the switch and multiplexer in the main control module BE, the GANG multi-channel can be across the chassis. The following examples illustrate the connection methods of several GANG modes between different chassis:

[0060] The power board 1 of the chassis 1 can gang the power board 2, the power board 2 can gang the power board 3, the power board 3 can gang the power board 4, ..., gang the power board 8.

[0061] Power board 2, power board 3, power board 4, power board 5, power board 6, power board 7, power board 8 of chassis 1 and power board 9 of chassis 2 are GANG together.

[0062] The power boards 3, 4, 5, 6, 7 and 8 of the chassis 1 and the power boards 9 and 10 of the chassis 2 are GANG together.

[0063] The power boards 4, 5, 6, 7 and 8 of the chassis 1 and the power boards 9, 10 and 11 of the chassis 2 are GANG together.

[0064] The power boards 5, 6, 7 and 8 of the chassis 1 and the power boards 9, 10, 11 and 12 of the chassis 2 are GANG together.

[0065] The power board 8 of the chassis 1 and the power boards 9, 10, 11, 12, 13, 14 and 15 of the chassis 2 are GANG together.

[0066] The above-mentioned test machine can realize the GANGBUS connection technology of high-current GANG output flexibly across boards and chassis. The circuit is simple and low-cost, and there is no limitation on the current size, which improves the convenience of use.

[0067] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A power board, characterized in that: include: More than two slave control modules, each of which includes a plurality of power supply units, and after the power supply units are connected in sequence, the power supply unit at the head end is connected to the input end of the slave control module, and the power supply unit at the tail end is connected to the output end of the slave control module; The main control module comprises a switching circuit, wherein the switching circuit connects the input end and the output end of each of the slave control modules and is used to connect at least two of the slave control modules.

2. The power board according to claim 1, characterized in that: In the slave control module, the power supply units are connected in a daisy chain manner; and / or the switching circuit connects at least two slave control modules in a star connection manner.

3. The power board according to claim 1, characterized in that: The power supply unit includes a power supply chip and a follower; among the power supply units connected in sequence, the power supply chip of the power supply unit located at the head end is connected to the input end of the slave control module, and the follower is connected to the power supply chip in the next power supply unit, and the follower of the power supply unit located at the end is connected to the output end of the slave control module.

4. The power board according to claim 3, characterized in that: The slave control module also includes an input follower and an output switching switch; the power chip in the power supply unit located at the head end is connected to the input follower, and is connected to the first moving contact of the output switching switch through the corresponding follower, the input follower is connected to the input end of the slave control module, the second moving contact of the output switching switch is connected to the follower in the power supply unit located at the end, and the static contact of the output switching switch is connected to the output end of the slave control module.

5. The power board according to any one of claims 1 to 4, characterized in that: The slave control modules include slave control module FE0, slave control module FE1, slave control module FE2 and slave control module FE3, and the switching circuit includes switch K1, switch K2, switch K3, switch K5, switch K6 and switch K7; The first end of the switch K1 is connected to the output end of the slave control module FE0, and the second end of the switch K1 is connected to the input end of the slave control module FE1; the first end of the switch K2 is connected to the output end of the slave control module FE1, and the second end of the switch K2 is connected to the input end of the slave control module FE2; the first end of the switch K3 is connected to the output end of the slave control module FE2, and the second end of the switch K3 is connected to the input end of the slave control module FE3; The first end of the switch K5 is connected to the input end of the slave control module FE0, and the second end of the switch K5 is connected to the input end of the slave control module FE1; the first end of the switch K6 is connected to the input end of the slave control module FE1, and the second end of the switch K6 is connected to the input end of the slave control module FE2; the first end of the switch K7 is connected to the input end of the slave control module FE2, and the second end of the switch K7 is connected to the input end of the slave control module FE3.

6. The power board according to claim 5, characterized in that: The switching circuit further includes a switch K4, a switch K8, a multiplexer U306 and a multiplexer U307, and the main control module further includes a connector for connecting between power boards; The first end of the switch K4 is connected to the output end of the slave control module FE3, the second end of the switch K4 is connected to the static contact of the multiplexer U307, the first end of the switch K8 is connected to the input end of the slave control module FE3, the second end of the switch K8 is connected to the static contact of the multiplexer U307, and the multiple moving contacts of the multiplexer U307 are respectively connected to the corresponding pins of the connector; the static contact of the multiplexer U306 is connected to the input end of the slave control module FE0, and the multiple moving contacts of the multiplexer U306 are respectively connected to the corresponding pins of the connector.

7. A testing machine, characterized in that: A power board comprising the power board described in any one of claims 1 to 6.

8. The testing machine according to claim 7, characterized in that: It also includes a chassis and a backplane. The backplane and more than two power supply boards are arranged in the chassis, and the power supply boards are connected through the backplane.

9. The testing machine according to claim 8, characterized in that: It also includes a control module arranged in the chassis, and the control module is connected to each of the power supply boards through the backplane.

10. The testing machine according to claim 8, characterized in that: The number of the chassis is more than two, and the control modules in each chassis are connected to each other.

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