CN-122000851-A - Multi-phase power supply time sequence control circuit and automatic testing device

CN122000851ACN 122000851 ACN122000851 ACN 122000851ACN-122000851-A

Abstract

The invention provides a multiphase power supply time sequence control circuit and an automatic testing device, which are applied to the technical field of integrated circuits. The multi-phase power supply time sequence control circuit comprises a main board circuit, a direct current power supply and an automatic test system, and the main board circuit comprises a reserved circuit in addition to a complex programmable logic device and a multi-phase power supply which are included under the traditional PI test. The complex programmable logic device is used for powering on the main board circuit, providing a first enabling signal for the multi-phase power supply when the working scene state is an untested state, and providing a second enabling signal for the multi-phase power supply when the working scene state is a tested state, so that the timing sequence of the second enabling signal obtained by the multi-phase power supply is later than that of the input voltage. Therefore, the multiphase power supply time sequence control circuit provided by the invention ensures that the time sequence of the enabling signal accords with various working scenes, and improves the efficiency and accuracy of the multiphase power supply PI test.

Inventors

LIU MEILING
Xu shaoxing
ZHANG XUELIANG

Assignees

浪潮计算机科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260126

Claims (10)

1. The multi-phase power supply time sequence control circuit is characterized by comprising a main board circuit, a direct current power supply and an automatic test system, wherein the main board circuit comprises a complex programmable logic device, a multi-phase power supply and a reserved circuit; The automatic test system is connected with the direct-current power supply and is used for sending a corresponding start-stop signal to the direct-current power supply according to the state of a working scene; the direct current power supply is connected with the multiphase power supply through a power pin in the main board circuit and is used for providing corresponding input voltage for the multiphase power supply according to whether the start-stop signal is provided for the multiphase power supply or not; The complex programmable logic device is connected with an enabling pin of the multiphase power supply and is used for powering up the main board circuit, and providing a first enabling signal for the multiphase power supply when the working scene state is an untested state; The power supply end of the reservation circuit is connected with a power supply pin in the main board circuit, the output end of the reservation circuit is connected with an enabling pin of the multiphase power supply and is used for providing a second enabling signal for the multiphase power supply when the DC power supply provides corresponding input voltage and the working scene state is a test state, so that the multiphase power supply obtains a time sequence of the second enabling signal which is later than a time sequence of the input voltage.
2. The multiphase power supply timing control circuit of claim 1, wherein the reservation circuit comprises a delay circuit, a regulating circuit, a voltage dividing circuit, and a filtering circuit; The first end of the delay circuit is connected with the first end of the regulating circuit and is jointly used as the input end of the reserved circuit to be connected with a power pin in the main board circuit; the second end of the delay circuit is connected with the second end of the regulating circuit, and the third end of the delay circuit is connected with the first end of the voltage dividing circuit; The second end of the voltage dividing circuit is connected with the first end of the filter circuit; The second end of the filter circuit is used as the output end of the reserved circuit and is connected with the enabling pin of the multiphase power supply; And the third end of the adjusting circuit is connected with the third end of the voltage dividing circuit and the third end of the filtering circuit and is grounded.
3. The multiphase power supply timing control circuit of claim 2, wherein the delay circuit is a MOS transistor; The source electrode of the MOS tube is used as the first end of the delay circuit and is connected with the first end of the regulating circuit and a power pin in the main board circuit; The grid electrode of the MOS tube is used as the second end of the delay circuit and is connected with the second end of the regulating circuit; and the drain electrode of the MOS tube is used as the third end of the delay circuit and is connected with the first end of the voltage dividing circuit.
4. The multiphase power supply timing control circuit of claim 2, wherein the regulating circuit comprises a first resistor and a first capacitor; the first end of the first resistor is used as the first end of the regulating circuit and is connected with the first end of the delay circuit and a power pin in the main board circuit; The second end of the first resistor is connected with the first end of the first capacitor and is jointly used as the second end of the regulating circuit to be connected with the second end of the delay circuit; The second end of the first capacitor is used as the third end of the adjusting circuit and is connected with the third end of the voltage dividing circuit and the third end of the filter circuit and grounded.
5. The multiphase power supply timing control circuit of claim 2, wherein the voltage divider circuit comprises a second resistor and a third resistor; The first end of the second resistor is used as the first end of the voltage dividing circuit and is connected with the third end of the delay circuit; the second end of the second resistor is connected with the first end of the third resistor and is jointly used as the second end of the voltage dividing circuit to be connected with the first end of the filter circuit; the second end of the third resistor is used as the third end of the voltage dividing circuit and is connected with the third end of the adjusting circuit and the third end of the filter circuit and grounded.
6. The multiphase power supply timing control circuit of claim 2, wherein the filter circuit comprises a fourth resistor and a second capacitor; the first end of the fourth resistor is used as the first end of the filter circuit and is connected with the second end of the voltage dividing circuit; The first end of the second capacitor is used as a third end of the filter circuit and is connected with the third end of the voltage dividing circuit and the third end of the regulating circuit and grounded; the second end of the fourth resistor is connected with the second end of the second capacitor and is jointly used as the second end of the voltage dividing circuit to be connected with the enabling pin of the multiphase power supply.
7. The multi-phase power supply timing control circuit according to any one of claims 2 to 6, further comprising a fifth resistor, a first switching component, and a second switching component; Wherein a first end of the fifth resistor is connected with the complex programmable logic device, and a second end of the fifth resistor is connected with a first end of the first switch component; the second end of the first switch component is connected with an enabling pin of the multiphase power supply; The first end of the second switch component is connected with the second end of the filter circuit; The second end of the second switch assembly is connected with an enabling pin of the multiphase power supply.
8. The multi-phase power supply timing control circuit of claim 7, further comprising a switch control circuit; The input end of the switch control circuit is connected with the automatic test system, and the output end of the switch control circuit is connected with the control end of the first switch assembly and the control end of the second switch assembly and used for controlling the on-off of the first switch assembly and the second switch assembly according to the working scene state.
9. The multi-phase power supply timing control circuit of claim 8, wherein the switch control circuit is specifically configured to control the first switch assembly to be turned on and the second switch assembly to be turned off when the operation scene state is the untested state, and to control the first switch assembly to be turned off and the second switch assembly to be turned on when the operation scene state is the tested state.
10. An automated test apparatus comprising the multiphase power timing control circuit of any one of claims 1-9.

Description

Multi-phase power supply time sequence control circuit and automatic testing device Technical Field The present invention relates to the field of integrated circuits, and in particular, to a multiphase power timing control circuit and an automated testing device. Background With the proliferation of demand in the credit market and the rapid expansion of markets of domestic servers and PCs (Personal Computer Market, personal computer markets), the core assembly of domestic CPUs (Central Processing Unit, central processing units), operating systems, databases and the like is gradually improved, products need to meet high-density and high-power consumption scene demands (such as cloud data centers and AI (ARTIFICIAL INTELLIGENCE, artificial intelligence) computing clusters) and the like, and the reliability of the power supply is directly influenced by the usability of the whole machine as a power core. The multiphase Power supply consists of a controller and a DrMOS (Driver-MOSFET), which is a Power module integrating a Driver chip and a Metal Oxide Semiconductor Field Effect Transistor (MOSFET) in the same package, and adopts an interleaved Buck topology (DC-DC Buck converter) to disperse load Current, reduce output voltage ripple and thermal stress, and simultaneously support dynamic phase number adjustment to match load requirements, and is used for directly supplying Power to the most critical modules such as a CPU (Central processing Unit), and complete PI (Power Integrity) test is required to be performed on the multiphase Power supply in a design stage so as to ensure Power supply quality. The existing automatic test system can run a plurality of test items by one key, can automatically collect and record data, avoids the risk of manual recording errors, further shortens the test period and saves the labor cost. When PI testing is performed independently, a complete machine system is not required to be built, after a main board is powered on, a CPLD (Complex Programmable Logic Device, a complex programmable logic device) gives an enable signal EN of a multiphase power supply (VR (Voltage Regulator, voltage regulator) circuit to be tested), signals corresponding to the multiphase power supply are connected to an oscilloscope, an automatic test system is operated, testing can be started, and an overall operation framework is shown in fig. 1. The DC-source (DC Power Supply) in fig. 1 is mainly used for providing an input voltage VIN for a multiphase Power Supply, an electronic load is used as an analog load for implementing simulation under different parameters, and an oscilloscope is used for determining a parameter state of the multiphase Power Supply according to a signal to be tested output by the multiphase Power Supply. Because the current automatic test system turns off the DC SOURCE, i.e. the input voltage VIN, after each test item is performed, and turns on the next test item, the main board is always powered on during this period, i.e. the VCC of the VR to be tested and the enable signal EN are always valid, so in the automatic test process, the controller determines that the input undervoltage triggers the protection as shown in fig. 2 according to the time sequence waveforms of the input voltage VIN provided by the DC SOURCE and the enable signal EN provided by the CPLD, thus leading to power failure of the power supply, and the error can be relieved only by re-powering on the EN enable signal or changing the protection mode, and the timing sequence of the enable signal EN of the multiphase power supply is earlier than the logic when the VIN does not accord with the normal operation of the whole machine. It can be seen how to shorten the test cycle in the power supply automation test system to save the labor cost is a problem to be solved by those skilled in the art. Disclosure of Invention The embodiment of the invention aims to provide a multiphase power supply time sequence control circuit and an automatic testing device, which can solve the problems of low automation degree, complicated testing flow and higher labor cost in the existing automatic testing. In order to solve the technical problems, in one aspect, the embodiment of the invention provides a multiphase power supply time sequence control circuit, which comprises a main board circuit, a direct current power supply and an automatic test system, wherein the main board circuit comprises a complex programmable logic device, a multiphase power supply and a reserved circuit; The automatic test system is connected with the direct-current power supply and is used for sending a corresponding start-stop signal to the direct-current power supply according to the state of the working scene; The direct current power supply is connected with the multiphase power supply through a power pin in the main board circuit and is used for providing corresponding input voltage for the multiphase power supply according to whether the start-stop signal is