Power supply control system for power converter

Abstract

The invention discloses a power supply control system of a multi-phase power converter. The power supply control system groups each of a plurality of power converters into one of a plurality of power groups. The power supply control system selects one of a plurality of power converters classified into the same power supply group as a master power converter and the others as slave power converters. The power supply control system outputs a turn-on time signal according to the data of the main power converter to control the turn-on time of the upper bridge switch and the lower bridge switch of each power converter so as to control the plurality of power converters to supply proper power to the external electronic device.

Description

Technical Field

[0001] The invention relates to a power converter, and in particular to a power supply control system of a multi-phase power converter. Background Art

[0002] For external electronic devices, power converters are indispensable devices. Power converters are used to adjust power and supply the adjusted power to external electronic devices. The upper bridge switch and the lower bridge switch of the power converter need to be switched according to data such as the voltage or current of the circuit components of the power converter so that the power converter can provide power to the external electronic device. However, the existing power supply control system cannot effectively control the power supply of multiple power converters at the same time, resulting in the external electronic device being unable to effectively receive appropriate power from multiple power converters. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a power supply control system of a multi-phase power converter in view of the shortcomings of the prior art, which is applicable to multiple power converters. The power supply control system of the multi-phase power converter includes an error amplifier circuit, a comparison circuit, a phase selection circuit, a multi-phase control circuit and an on-time determination circuit. The error amplifier circuit is connected to each of the power converters. The error amplifier circuit is configured to multiply the difference between the output voltage of each of the power converters and the first reference voltage by a gain to output an error amplification signal. The comparison circuit is connected to the error amplifier circuit. The comparison circuit is configured to compare the voltage of the error amplification signal of each of the power converters with the voltage of a ramp signal to output a comparison signal. The phase selection circuit is connected to the comparison circuit. The phase selection circuit is configured to group each of the multiple power converters into one of the multiple power groups. The phase selection circuit is configured to select one of the multiple power converters classified into the same power group as a master power converter and the other power converters as slave power converters. The phase selection circuit is configured to output the comparison signal of the master power converter as a master phase signal and to output the comparison signal of each slave power converter as a slave phase signal. A multi-phase control circuit is connected to the phase selection circuit. The multi-phase control circuit is configured to output an on-time control signal according to the master phase signal of the master power converter. An on-time determination circuit is connected to the multi-phase control circuit and each of the power converters. The on-time determination circuit is configured to set an on-time according to the on-time control signal of the master power converter. The on-time determination circuit is configured to output an on-time signal to each of the power converters classified into the same power group as the master power converter according to the on-time. Each of the plurality of power converters operates according to the on-time signal received from the on-time determination circuit.

[0004] In an embodiment, each of the power converters includes an upper bridge switch, a lower bridge switch, a drive circuit, and a control circuit. The first end of the upper bridge switch is coupled to an input voltage. The first end of the lower bridge switch is connected to the second end of the upper bridge switch. The node between the first end of the lower bridge switch and the second end of the upper bridge switch is connected to the first end of an inductor. The second end of the inductor is connected to the first end of a capacitor. The second end of the capacitor is grounded. The drive circuit is connected to the control end of the upper bridge switch and the control end of the lower bridge switch. The control circuit is connected to the drive circuit and the output end of the conduction time determination circuit. The control circuit is configured to control the drive circuit to drive the upper bridge switch and the lower bridge switch according to the conduction time signal.

[0005] In an embodiment, the multi-phase control circuit obtains a plurality of master-slave codes of the plurality of power converters from a lookup table, and determines which of the plurality of power converters uses the comparison signal as the master phase signal according to the plurality of master-slave codes.

[0006] In an embodiment, the multi-phase control circuit uses the comparison signal of the power converter whose master-slave code is the first master-slave code as the master phase signal, and uses the comparison signals of the other power converters whose master-slave code is the second master-slave code as the slave phase signal.

[0007] In an embodiment, the multiple power converters are classified into multiple power groups, and the multi-phase control circuit obtains multiple grouping codes of the multiple power converters from a lookup table, and determines which of the multiple power converters are classified into the same one of the multiple power groups based on the multiple grouping codes.

[0008] In an embodiment, the error amplifier circuit includes a plurality of error amplifiers. The first input terminals of the plurality of error amplifiers are respectively connected to the output terminals of the plurality of power converters. The second input terminal of each of the error amplifiers is coupled to the first reference voltage. The output terminals of the plurality of error amplifiers are connected to the input terminal of the comparison circuit.

[0009] In an embodiment, the comparison circuit comprises a plurality of comparators. The first input terminals of the plurality of comparators are respectively connected to the output terminals of the plurality of error amplifiers. The second input terminal of each of the comparators receives the ramp signal from the connected external ramp signal generator. The output terminals of the plurality of comparators are connected to the input terminal of the phase selection circuit.

[0010] In an embodiment, the phase selection circuit includes a plurality of phase selectors. The input ends of the plurality of phase selectors are respectively connected to the output ends of the plurality of comparators. The output ends of the plurality of phase selectors are connected to the input end of the multi-phase control circuit. One of the plurality of phase selectors outputs the received comparison signal as the master phase signal according to a master-slave indication signal. The other plurality of phase selectors each outputs the received comparison signal as the slave phase signal.

[0011] In an embodiment, the on-time determination circuit comprises a plurality of on-time generators, the input ends of the plurality of on-time generators are connected to the output ends of the multi-phase control circuit, and the output ends of the plurality of on-time generators are respectively connected to the input ends of the plurality of power converters.

[0012] In an embodiment, the phase selection circuit includes a plurality of master-slave reference comparison circuits, a logic analysis circuit, and a conduction setting circuit. The input ends of the plurality of master-slave reference comparison circuits are connected to the output end of the comparison circuit. The logic analysis circuit is connected to the output end of the master-slave reference comparison circuit and the input end of the conduction setting circuit. The output end of the conduction setting circuit serves as the output end of the phase selection circuit. The plurality of master-slave reference comparison circuits compare the levels of the plurality of comparison signals of the plurality of power converters with a master-slave code of the master power converter to output a plurality of master control reference comparison signals respectively. The logic analysis circuit controls the conduction setting circuit to output the conduction time signal to each of the power converters according to the plurality of master control reference comparison signals.

[0013] In an embodiment, each of the master-slave reference comparison circuits comprises an AND gate. The first input end of each of the plurality of AND gates of the plurality of master-slave reference comparison circuits obtains the logic value of the master-slave code of the master power converter from the connected table lookup module. The second input end of the plurality of AND gates receives the plurality of comparison signals of the plurality of power converters from the comparison circuit. The output ends of the plurality of AND gates are connected to the input end of the logic analysis circuit.

[0014] In an embodiment, each of the master-slave reference comparison circuits comprises a NAND gate and a NOT gate. The first input end of each of the plurality of NAND gates of the plurality of master-slave reference comparison circuits obtains the logic value of the master-slave code of the master power converter from the connected table lookup module. The second input end of the plurality of NAND gates receives the plurality of comparison signals of the plurality of power converters from the comparison circuit. The output ends of the plurality of NAND gates are connected to the input ends of the plurality of NOT gates respectively. The output ends of the plurality of NOT gates are connected to the input end of the logic analysis circuit.

[0015] In an embodiment, the phase selection circuit further includes a plurality of grouping comparison circuits. The plurality of grouping comparison circuits are connected to the logic analysis circuit. The plurality of power converters are classified into a plurality of power groups. The plurality of grouping comparison circuits obtain the plurality of grouping codes of the plurality of power converters respectively contained in the information of each of the power groups from the connected table lookup module. Each of the grouping comparison circuits compares the two grouping codes of the two power converters classified into the same power group with each other to output a grouping comparison signal. The logic analysis circuit determines whether each two of the plurality of power converters are classified into the same power group based on the plurality of grouping comparison signals respectively received from the plurality of grouping comparison circuits, so as to control the conduction time signal output by the conduction setting circuit to each of the power converters.

[0016] In an embodiment, each of the grouping comparison circuits comprises an AND gate. The first input terminal and the second input terminal of each of the plurality of AND gates of the plurality of grouping comparison circuits respectively obtain the logic values ​​of the two grouping codes of two of the plurality of power converters in the information of the same power group from the connected table lookup module. The output terminals of the plurality of AND gates are connected to the input terminals of the logic analysis circuit.

[0017] In an embodiment, each of the grouping comparison circuits comprises a NAND gate and a NOT gate. The first input terminal and the second input terminal of each of the plurality of AND gates of the plurality of grouping comparison circuits respectively obtain the logic values ​​of the two grouping codes of two of the plurality of power converters in the information of the same power group from the connected table lookup module. The output terminals of the plurality of NAND gates are respectively connected to the input terminals of the plurality of NOT gates. The output terminals of the plurality of NOT gates are connected to the input terminals of the logic analysis circuit.

[0018] As described above, the present invention provides a power supply control system for a multi-phase power converter. The power supply control system of the present invention groups multiple power converters (supplying power to different external electronic devices or loads) into different power groups, and individually controls the power supply of multiple power converters in each power group, so that the power supply control of different power groups does not interfere with each other. The power supply control system of the present invention selects one of the multiple power converters in the same power group as the main power converter, and the others are each slave power converters, and controls the operation of the main power converter and the slave power converters in the same power group according to the data of the main power converter, for example, controlling multiple power converters in the same power group to supply the same output voltage and output current.

[0019] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 4 is a block diagram of a power supply control system of a multi-phase power converter according to a first embodiment of the present invention.

[0021] Figure 2 FIG. 4 is a block diagram of a power supply control system of a multi-phase power converter according to a second embodiment of the present invention.

[0022] Figure 3 FIG. 1 is a circuit diagram of a power supply control system of a multi-phase power converter and a power converter controlled by the multi-phase power converter according to a second embodiment of the present invention.

[0023] Figure 4 FIG. 4 is a block diagram of a power supply control system of a multi-phase power converter according to a third embodiment of the present invention.

[0024] Figure 5 FIG. 4 is a block diagram of a phase selection circuit of a power supply control system of a multi-phase power converter according to a fourth embodiment of the present invention.

[0025] Figure 6 FIG. 5 is a block diagram of a phase selection circuit of a power supply control system of a multi-phase power converter according to a fifth embodiment of the present invention.

[0026] Figure 7 FIG. 6 is a block diagram of a phase selection circuit of a power supply control system of a multi-phase power converter according to a sixth embodiment of the present invention.

[0027] Figure 8 It is a schematic diagram of group codes and master-slave code data of a power supply control system of a multi-phase power converter according to a seventh embodiment of the present invention.

[0028] Fig. 9 It is a schematic diagram of group codes and master-slave code data of a power supply control system of a multi-phase power converter according to an eighth embodiment of the present invention.

[0029] Fig.10 FIG. 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to an eighth embodiment of the present invention.

[0030] Fig.11 It is a schematic diagram of group codes and master-slave code data of a power supply control system of a multi-phase power converter according to a ninth embodiment of the present invention.

[0031] Fig.12 FIG. 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to a ninth embodiment of the present invention.

[0032] Fig.13 It is a schematic diagram of group codes and master-slave code data of a power supply control system of a multi-phase power converter according to a tenth embodiment of the present invention.

[0033] Fig.14 FIG. 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to a tenth embodiment of the present invention.

[0034] Fig.15 It is a schematic diagram of group codes and master-slave code data of a power supply control system of a multi-phase power converter according to an eleventh embodiment of the present invention.

[0035] Fig.16 FIG. 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to an eleventh embodiment of the present invention.

[0036] Fig.17 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to a twelfth embodiment of the present invention.

[0037] Fig.18 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to a thirteenth embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following is an explanation of the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following embodiments will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention. In addition, the term "or" used herein may include any one or more combinations of the associated listed items depending on the actual situation.

[0039] See also Figure 1 , which is a block diagram of a power supply control system of a multi-phase power converter according to a first embodiment of the present invention.

[0040] The power supply control system of the first embodiment of the present invention is applicable to a plurality of power converters, such as but not limited to Figure 1 A plurality of power converters PW1 to PW6 are shown. In practice, the power supply control system of the present invention can be applied to fewer or more power converters.

[0041] like Figure 1As shown, the power supply control system of the multi-phase power converter according to the first embodiment of the present invention includes an error amplifier circuit EARR, a comparison circuit COMP, a phase selection circuit PHSL, a multi-phase control circuit MPHA and an on-time determination circuit TONT.

[0042] The output terminals of the power converters PW1 to PW6 are connected to the input terminal of the error amplifier circuit EARR and the power receiving terminal of the external electronic device. The error amplifier circuit EARR multiplies the difference between the output voltage of each power converter PW1 to PW6 and the first reference voltage by a gain to output an error amplification signal.

[0043] The output terminal of the error amplifier circuit EARR is connected to the input terminal of the comparison circuit COMP. The comparison circuit COMP compares the voltage of the error amplified signal of each power converter PW1 to PW6 received from the error amplifier circuit EARR with the voltage of a ramp signal to output a comparison signal.

[0044] The output terminal of the comparison circuit COMP is connected to the input terminal of the phase selection circuit PHSL. It is worth noting that the phase selection circuit PHSL selects one of the comparison signals of the power converters PW1 to PW6 output by the comparison circuit COMP as a master phase signal output, and outputs the others as slave phase signals.

[0045] The output terminal of the phase selection circuit PHSL is connected to the input terminal of the multi-phase control circuit MPHA. The multi-phase control circuit MPHA outputs an on-time control signal according to the main phase signal received from the phase selection circuit PHSL.

[0046] The output of the multi-phase control circuit MPHA is connected to the input of the on-time determination circuit TONT. The on-time determination circuit TONT sets an on-time according to an on-time control signal received from the multi-phase control circuit MPHA, and outputs an on-time signal to each power converter PW1 to PW6.

[0047] The output end of the on-time determination circuit TONT of the power supply control system of the first embodiment of the present invention is connected to the input ends of the plurality of power converters PW1 to PW6. The plurality of power converters PW1 to PW6 operate according to an on-time signal received from the on-time determination circuit TONT. As a result, the plurality of power converters PW1 to PW6 operate as desired, so that the output voltage values ​​or output current values ​​of the plurality of power converters PW1 to PW6 can be effectively controlled to be the same or similar.

[0048] See also Figure 2 and Figure 3 ,in Figure 2is a block diagram of a power supply control system of a multi-phase power converter according to a second embodiment of the present invention, Figure 3 FIG. 1 is a circuit diagram of a power supply control system of a multi-phase power converter and a power converter controlled by the multi-phase power converter according to a second embodiment of the present invention.

[0049] like Figure 2 As shown, the power supply control system of the multi-phase power converter according to the second embodiment of the present invention includes an error amplifier circuit EARR, a comparison circuit COMP, a phase selection circuit PHSL, a multi-phase control circuit MPHA and an on-time determination circuit TONT.

[0050] The power supply control system of the second embodiment of the present invention is applicable to a multi-phase power converter POWR, for example but not limited to a plurality of power converters PW1 to PW6. In practice, the power supply control system of the present invention can be applied to fewer or more power converters.

[0051] The error amplifier circuit EARR of the power supply control system of the second embodiment of the present invention includes a plurality of error amplifiers, such as but not limited to Figure 2 The first input terminals of the plurality of error amplifiers EA1 to EA6 are respectively connected to the output terminals of the plurality of power converters PW1 to PW6 to respectively receive the output voltages VOUT1 to VOUT6 of the plurality of power converters PW1 to PW6 or their divided voltages. The second input terminals of the plurality of error amplifiers EA1 to EA6 are coupled to the output terminals of the plurality of power converters PW1 to PW6. Figure 3 The first reference voltage Vref1 is shown.

[0052] The multiple power converters PW1 to PW6 may have the same circuit component configuration. Figure 3 As shown, the power converter PW1 includes an upper bridge switch UG, a lower bridge switch LG, a control circuit CTR and a drive circuit DRV. The first end of the upper bridge switch UG is coupled to an input voltage VIN. The first end of the lower bridge switch LG is connected to the second end of the upper bridge switch UG. The node between the first end of the lower bridge switch LG and the second end of the upper bridge switch UG is connected to the first end of the inductor L. The second end of the inductor L is connected to the first end of the capacitor C. The second end of the capacitor C is grounded.

[0053] If necessary, the power converter PW1 can be Figure 3 The figure also includes a voltage divider circuit RDV. The voltage divider circuit RDV includes a first resistor R1 and a second resistor R2. A node between the second end of the inductor L and the first end of the capacitor C is connected to the first end of the first resistor R1. The second end of the first resistor R1 is connected to the first end of the second resistor R2. The second end of the second resistor R2 is grounded.

[0054] like Figure 3As shown, the first input terminal of the error amplifier EA1, such as the inverting input terminal, is connected to the node between the second terminal of the first resistor R1 and the first terminal of the second resistor R2 to receive the divided voltage of the output voltage VOUT1 of the power converter PW1 as a feedback voltage FB1. In practice, the first input terminal of the error amplifier EA1 can be directly connected to the node between the second terminal of the inductor L and the first terminal of the capacitor C (i.e., the output terminal of the power converter PW1) to receive the output voltage VOUT1 of the power converter PW1 as a feedback voltage FB1. The second input terminal of the error amplifier EA1, such as the non-inverting input terminal, is coupled to the first reference voltage Vref1.

[0055] like Figure 2 As shown, the comparison circuit COMP includes a plurality of comparators CM1 to CM6. The first input terminals of the plurality of comparators CM1 to CM6 are respectively connected to the output terminals of the plurality of error amplifiers EA1 to EA6. The second input terminal of each of the comparators CM1 to CM6 is connected to an external ramp signal generator to receive a ramp signal from the external ramp signal generator. For example, Figure 3 As shown, the output terminal of the error amplifier EA1 is connected to the first input terminal of the comparator CM1, such as the non-inverting input terminal, to output an error amplified signal EAO to the first input terminal of the comparator CM1, and the second input terminal of the comparator CM1, such as the inverting input terminal, receives a ramp signal RAMP.

[0056] The phase selection circuit PHSL includes a plurality of phase selectors, such as but not limited to Figure 2 The multiple phase selectors PH1 to PH6 are shown. The input ends of the multiple phase selectors PH1 to PH6 are respectively connected to the output ends of the multiple comparators CM1 to CM6. The output ends of the multiple phase selectors PH1 to PH6 are connected to the input ends of the multi-phase control circuit MPHA.

[0057] The input ends of the plurality of phase selectors PH1 to PH6 receive the plurality of comparison signals outputted by the plurality of comparators CM1 to CM6, respectively. One of the plurality of phase selectors PH1 to PH6 (according to a master-slave indication signal received from an external circuit) outputs the received comparison signal as a master phase signal to the multi-phase control circuit MPHA. In addition, the other plurality of phase selectors PH1 to PH6 (according to a master-slave indication signal received from an external circuit) each outputs the received comparison signal as a slave phase signal to the multi-phase control circuit MPHA.

[0058] The multi-phase control circuit MPHA outputs a plurality of on-time control signals to the plurality of on-time generators TO1 to TO6 respectively according to the main phase signal received from the phase selection circuit PHSL.

[0059] The input terminals of the multiple on-time generators TO1 to TO6 are connected to the output terminal of the multi-phase control circuit MPHA. The multiple on-time generators TO1 to TO6 respectively set multiple on-times according to multiple on-time control signals received from the multi-phase control circuit MPHA, and output multiple on-time signals accordingly.

[0060] The control circuits CTR of the power converters PW1 to PW6 are connected to the output terminals of the on-time generators TO1 to TO6. In each of the power converters PW1 to PW6, the control circuit CTR determines the on-time of the upper bridge switch UG and the lower bridge switch LG according to a received on-time signal, so as to control the driving circuit DRV to drive the upper bridge switch UG and the lower bridge switch LG to operate. As a result, the power converters PW1 to PW6 can supply appropriate power, such as supplying the same output voltages VOUT1 to VOUT6 or output currents I1 to I6.

[0061] See also Figure 4 , which is a block diagram of a power supply control system of a multi-phase power converter according to a third embodiment of the present invention. The similarities between the third embodiment and the second embodiment are not repeated here.

[0062] The difference between the third embodiment of the present invention and the second embodiment is that the power supply control system of the multi-phase power converter of the third embodiment of the present invention further includes a sensing circuit SENR. The sensing circuit SENR may include multiple sensors such as but not limited to: Figure 4 A plurality of sensors SE1 to SE6 are shown.

[0063] The plurality of sensors SE1 to SE6 can be connected to the plurality of power converters PW1 to PW6, respectively. The plurality of sensors SE1 to SE6 can sense the output currents of the plurality of power converters PW1 to PW6, respectively, and output the sensed output currents of the plurality of power converters PW1 to PW6 (after being converted into a plurality of sensing voltages) to the respective output terminals. Figure 4 The multi-phase control circuit MPHA (or another multi-phase control circuit) is shown.

[0064] The multi-phase control circuit MPHA (or another multi-phase control circuit) can control the multiple on-time signals output by the multiple on-time generators TO1 to TO6 to the multiple power converters PW1 to PW6 respectively based on the output currents (or the converted multiple sensing voltages) of the multiple power converters PW1 to PW6 received from the sensing circuit SENR, thereby controlling the power supplied by the multiple power converters PW1 to PW6.

[0065] See also Figure 5 , which is a block diagram of a phase selection circuit of a power supply control system of a multi-phase power converter according to a fourth embodiment of the present invention.

[0066] The power supply control system of the fourth to sixth and ninth to eleventh embodiments of the present invention connects a plurality of power converters such as Figure 1 The multiple power converters PW1 to PW6 are classified into different power groups. The multiple power converters PW1 to PW6 classified into different power groups can supply power to different external electronic devices. The multiple power converters PW1 to PW6 classified into the same power group can supply power to the same external electronic device.

[0067] For example, Figure 1 The phase selection circuit PHSL shown can be replaced by Figure 5 The phase selection circuit PHSL1 is shown.

[0068] like Figure 5 As shown, the phase selection circuit PHSL1 of the present invention may include a first circuit LOG1, a second circuit LOG2, a logic analysis circuit LOG3 and a conduction setting circuit TST. The first circuit LOG1 includes a plurality of group comparison circuits GP1 to GPn. The second circuit LOG2 may include a plurality of master-slave reference comparison circuits MS1 to MSm.

[0069] The logic analysis circuit LOG3 is connected to the outputs of the plurality of group comparison circuits GP1 to GPn, the outputs of the master-slave reference comparison circuits MS1 to MSm and the input of the conduction setting circuit TST. The output of the conduction setting circuit TST serves as the output of the phase selection circuit PHSL1.

[0070] It is worth noting that the first circuit LOG1 of the phase selection circuit PHSL1 includes a plurality of grouping comparison circuits GP1 to GPn for determining which of the plurality of power converters PW1 to PW6 are classified into the same power group, as described in detail below.

[0071] The plurality of grouping comparison circuits GP1 to GPn obtain the plurality of grouping codes of each power converter PW1 to PW6 in the information of the plurality of power groups from a lookup table (stored in a connected lookup module).

[0072] The plurality of grouping comparison circuits GP1 to GPn compare each two of the plurality of grouping codes of the plurality of power converters PW1 to PW6 included in the information of each power group in the plurality of power group information. Specifically, each of the grouping comparison circuits GP1 to GPn compares each two of the plurality of power converters PW1 to PW6 indicated by the information of the same power group with each other to output a grouping comparison signal.

[0073] The logic analysis circuit LOG3 determines whether any two of the power converters PW1 to PW6 are classified into the same power group according to the grouping comparison signals respectively received from the grouping comparison circuits GP1 to GPn.

[0074] It is worth noting that the power supply control system of the fourth embodiment of the present invention selects one of the multiple power converters PW1 to PW6 as a master power converter and each of the others as a slave power converter. The power supply control system of the fourth embodiment of the present invention controls the other slave power converters according to the relevant data of the master power converter (such as the comparison signal as a master phase signal mentioned above). Therefore, in the power supply control system of the fourth embodiment of the present invention, a plurality of master-slave reference comparison circuits MS1 to MSm of the second circuit LOG2 are provided.

[0075] The input terminals of the multiple master-slave reference comparison circuits MS1 to MSm are respectively connected as follows: Figure 1 The output terminal of the comparison circuit COMP shown in FIG. Figure 4 The output terminals of the plurality of comparators CM1 to CM6 of the comparison circuit COMP shown.

[0076] A plurality of master-slave reference comparison circuits MS1 to MSm receive a plurality of comparison signals outputted from a comparison circuit COMP for a plurality of power converters PW1 to PW6, respectively. Each of the master-slave reference comparison circuits MS1 to MSm compares the level of the comparison signal received from the comparison circuit COMP with a master-slave code (logic value or voltage level) of the master power converter (obtained from a lookup table) to output a master control reference comparison signal.

[0077] The logic analysis circuit LOG3 outputs a logic analysis signal according to the plurality of group comparison signals received from the plurality of group comparison circuits GP1 to GPn and the plurality of master reference comparison signals received from the plurality of master-slave reference comparison circuits MS1 to MSm.

[0078] The conduction setting circuit TST outputs a plurality of conduction time signals to a plurality of power converters PW1 to PW6 according to a logic analysis signal received from the logic analysis circuit LOG3, so as to control the plurality of power converters PW1 to PW6 to respectively supply output voltages VOUT1 to VOUT6 (having the same voltage value) or supply output currents I1 to I6 (having the same current value).

[0079] See also Figure 6 , which is a block diagram of a phase selection circuit of a power supply control system of a multi-phase power converter according to a fifth embodiment of the present invention. The similarities between the fifth embodiment and the fourth embodiment of the present invention are not repeated here.

[0080] like Figure 1 The phase selection circuit PHSL shown can be replaced by Figure 6 The phase selection circuit PHSL2 is shown.

[0081] For example, Figure 6 As shown, the plurality of grouping comparison circuits GP1 to GPn respectively include a plurality of NAND gates NAND11 to NAND1n and a plurality of NOT gates NOT11 to NOT1n.

[0082] The first input terminal and the second input terminal of each of the NAND gates NAND11 to NAND1n respectively obtain the logic values ​​of two grouping codes of two of the power converters PW1 to PW6 in the information of the same power group from the connected table lookup module.

[0083] For example, when the logic value of the grouping code of each power converter PW1 to PW6 in the information of a certain power group is the logic value of the first grouping code (for example, but not limited to the logic value "0"), it means that each power converter PW1 to PW6 is not classified into this power group. On the contrary, when the logic value of the grouping code of each power converter PW1 to PW6 in the information of a certain power group is the logic value of the second grouping code (for example, but not limited to the logic value "1"), it means that each power converter PW1 to PW6 is classified into this power group.

[0084] The output terminals NOT11 to NOT1n of the plurality of NAND gates NAND11 to NAND1n are respectively connected to the input terminals of the plurality of NOT gates NOT11 to NOT1n. The output terminals of the plurality of NOT gates NOT11 to NOT1n are connected to the input terminal of the logic analysis circuit LOG3.

[0085] For example, Figure 6 As shown, the plurality of master-slave reference comparison circuits MS1 to MSm respectively include a plurality of NAND gates NAND21 to NAND2m, and respectively include a plurality of NOT gates NOT21 to NOT2m.

[0086] The first input terminal of each of the NAND gates NAND21 to NAND2m obtains the logic value of the master-slave code of the master power converter among the plurality of power converters PW1 to PW6 from a connected table lookup module.

[0087] For example, the logic value of the master-slave code of the one of the multiple power converters PW1 to PW6 that serves as the master power converter is the logic value of the first master-slave code (for example, but not limited to the logic value "1"), and the logic value of the master-slave code of each of the other power converters that serves as a slave power converter is the logic value of the second master-slave code (for example, but not limited to the logic value "0").

[0088] Second input terminals of the plurality of NAND gates NAND21 to NAND2 m receive a plurality of comparison signals of the plurality of power converters PW1 to PW6 from the comparison circuit COMP, respectively.

[0089] The output ends of the plurality of NAND gates NAND21 to NAND2m are respectively connected to the input ends of the plurality of NOT gates NOT21 to NOT2m. The output ends of the plurality of NOT gates NOT21 to NOT2m are connected to the input end of the logic analysis circuit LOG3.

[0090] See also Figure 7 , which is a block diagram of a phase selection circuit of a power supply control system of a multi-phase power converter according to a sixth embodiment of the present invention. The sixth embodiment of the present invention is similar to the fourth embodiment and is not described in detail here.

[0091] like Figure 1 The phase selection circuit PHSL shown can be replaced by Figure 7 The phase selection circuit PHSL3 is shown.

[0092] For example, Figure 7 As shown, the plurality of grouping comparison circuits GP1 to GPn respectively include a plurality of AND gates AND11 to AND1n.

[0093] The first input terminal and the second input terminal of each AND gate NAND11 to AND1n respectively obtain the logic values ​​of two group codes in the information of the same power group (hereinafter described as group information) of two of the multiple power converters PW1 to PW6 from the connected table lookup module. The output terminals of the multiple AND gates NAND11 to AND1n are connected to the input terminals of the logic analysis circuit LOG3.

[0094] For example, Figure 7 As shown, the plurality of master-slave reference comparison circuits MS1 to MSm respectively include a plurality of AND gates AND21 to AND2m.

[0095] The first input end of each AND gate AND21 to AND2m obtains the logic value of the master-slave code of the one of the multiple power converters PW1 to PW6 that is the master power converter from a connected table lookup module. The second input ends of the multiple AND gates AND21 to AND2m receive the multiple comparison signals of the multiple power converters PW1 to PW6 from the comparison circuit COMP. The output ends of the multiple AND gates AND21 to AND2m are connected to the input end of the logic analysis circuit LOG3.

[0096] In practice, the plurality of AND gates AND21 to AND2m in the sixth embodiment of the present invention can be replaced by Figure 6Alternatively, the plurality of AND gates AND11 to AND1n of the sixth embodiment of the present invention may be replaced by the following: Figure 6 The shown NAND gates NAND11 to NAND1n and NAND gates NOT11 to NOT1n, or other logic components.

[0097] See also Figure 8 , which is a schematic diagram of the grouping code and master-slave code data of the power supply control system of the multi-phase power converter according to the seventh embodiment of the present invention.

[0098] The phase selection circuit (eg Figure 1 The phase selection circuit PHSL shown, Figure 5 The phase selection circuit PHSL1 shown, Figure 6 The phase selection circuit PHSL2 shown, Figure 7 The phase selection circuit PHSL3 shown can be obtained from Figure 8 The table shown in the figure shows Figure 1 The plurality of grouping information and the plurality of master-slave information of the plurality of power converters PW1 to PW6 are shown. In practice, the lookup table may list the information of more power converters.

[0099] The phase selection circuit of the power supply control system of the seventh embodiment of the present invention is as follows: Figure 8 The lookup table shown obtains the multiple grouping codes of multiple power converters PW1 to PW6 in the grouping information GRP1 of the first power group, the multiple grouping codes in the grouping information GRP2 of the second power group, and the multiple grouping codes in the grouping information GRP3 of the third power group.

[0100] like Figure 8 As shown, in the seventh embodiment of the present invention, in the grouping information GRP1 of the first power group, the plurality of grouping codes of the plurality of power converters PW1 to PW6 are all the same, for example but not limited to all being "1", indicating that the plurality of power converters PW1 to PW6 are all classified into the first power group. The plurality of power converters PW1 to PW6 classified into the same power group can be connected to the same external electronic device and supply power to the same external electronic device.

[0101] As described above, the power supply control system of the present invention can select one of the multiple power converters PW1 to PW6 classified into the same power group as a main power converter, and control the operation of all power converters in the same power group as the main power converter based on the data of the main power converter (such as the above-mentioned comparison signal).

[0102] For example, the phase selection circuit of the power supply control system of the seventh embodiment of the present invention is as follows: Figure 8 In the master-slave information MSR on the lookup table shown, a plurality of master-slave codes of the plurality of power converters PW1 to PW6 are obtained. For example, the master-slave code of the power converter PW2 is "1", and the power converter PW2 is determined to be designated as a master power converter, and the master-slave codes of the other power converters PW1, PW3 to PW6 are "0", and the other power converters PW1, PW3 to PW6 are determined to be designated as a slave power converter.

[0103] See also Fig. 9 and Fig.10 ,in Fig. 9 FIG. 8 is a schematic diagram of group codes and master-slave code data of a power supply control system of a multi-phase power converter according to an eighth embodiment of the present invention. Fig.10 FIG. 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to an eighth embodiment of the present invention.

[0104] The similarities between the eighth embodiment and the seventh embodiment of the present invention are not repeated here.

[0105] The differences between the eighth embodiment of the present invention and the seventh embodiment are described as follows.

[0106] The phase selection circuit of the power supply control system of the eighth embodiment of the present invention (whose internal component configuration may be the same as that of the above-mentioned power supply control system) is as follows: Fig. 9 In the master-slave information MSR on the lookup table shown, the master-slave code of the power converter PW1 is "1", thereby determining that the power converter PW1 is designated as a master power converter, while the master-slave code of each of the other power converters PW2 to PW6 is "0", thereby determining that each of the other power converters PW2 to PW6 is designated as a slave power converter.

[0107] The power supply control system of the eighth embodiment of the present invention is based on Fig. 9 The data of the power converter PW1 as a main power converter indicated by the lookup table (including the comparison signal of the power converter PW1) is used to control the operation of the plurality of power converters PW1 to PW6. The result is as follows: Fig.10 As shown, the output voltages VOUT1 to VOUT6 of the power converters PW1 to PW6 are the same as each other, and the output currents I1 to I6 are the same as each other.

[0108] See also Fig.11 and Fig.12 ,in Fig.11 Schematic diagram of group codes and master-slave code data of a power supply control system of a multi-phase power converter according to a ninth embodiment of the present invention, Fig.12FIG. 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to a ninth embodiment of the present invention.

[0109] The similarities between the ninth embodiment of the present invention and the seventh embodiment are not repeated here.

[0110] The differences between the ninth embodiment of the present invention and the seventh embodiment are described as follows.

[0111] The phase selection circuit of the power supply control system of the ninth embodiment of the present invention (whose internal component configuration may be the same as that of the above-mentioned power supply control system) is as follows: Fig.11 In the grouping information GRP1 of the first power group in the lookup table shown, the multiple grouping codes of the power converters PW1, PW2, PW3, and PW5 are all "1", thereby determining that these power converters PW1, PW2, PW3, and PW5 are classified into the first power group.

[0112] The phase selection circuit of the power supply control system of the ninth embodiment of the present invention is as follows: Fig.11 In the master-slave information MSR on the lookup table shown, the master-slave codes of the multiple power converters PW1, PW2, PW3, and PW5 classified into the first power group are 1, 0, 0, and 0, respectively, thereby determining that the power converter PW1 is a master power converter, and the other power converters PW2, PW3, and PW5 are each a slave power converter.

[0113] The power supply control system of the ninth embodiment of the present invention is based on Fig.11 The data of the power converter PW1 as a main power converter indicated by the lookup table (including the comparison signal of the power converter PW1) is used to control the operation of the multiple power converters PW1, PW2, PW3, and PW5. The result is as follows: Fig.12 As shown, the output voltages VOUT1, VOUT2, VOUT3, VOUT5 of the power converters PW1, PW2, PW3, PW5 classified into the first power group are the same as each other, and the output currents I1, I2, I3, I5 are the same as each other.

[0114] On the other hand, the phase selection circuit of the power supply control system of the ninth embodiment of the present invention is as follows: Fig.11 In the grouping information GRP2 of the second power group in the lookup table shown, the plurality of grouping codes of the power converters PW4 and PW6 are both "1", thereby determining that the power converters PW4 and PW6 are classified into the second power group.

[0115] The phase selection circuit of the power supply control system of the ninth embodiment of the present invention is as follows: Fig.11In the master-slave information MSR on the lookup table shown, the master-slave codes of the multiple power converters PW4 and PW6 classified into the second power group are 1 and 0 respectively, thereby determining that the power converter PW4 is a master power converter and the power converter PW6 is a slave power converter.

[0116] The power supply control system of the ninth embodiment of the present invention is based on Fig.11 The data of the power converter PW4 as a main power converter indicated by the lookup table (including the comparison signal of the power converter PW4) is used to control the operation of the multiple power converters PW4 and PW6. The result is as follows: Fig.12 As shown, the power converters PW4 and PW6 classified into the first power group have the same output voltages VOUT4 and VOUT6 , and the same output currents I4 and I6 .

[0117] See also Fig.13 and Fig.14 ,in Fig.13 FIG. 1 is a schematic diagram of group codes and master-slave code data of a power supply control system of a multi-phase power converter according to a tenth embodiment of the present invention. Fig.14 FIG. 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to a tenth embodiment of the present invention.

[0118] The similarities between the tenth embodiment of the present invention and the seventh embodiment are not repeated here.

[0119] The differences between the tenth embodiment of the present invention and the seventh embodiment are described as follows.

[0120] The phase selection circuit of the power supply control system of the tenth embodiment of the present invention (whose internal component configuration may be the same as that of the above-mentioned power supply control system) is as follows: Fig.13 In the grouping information GRP1 of the first power group in the lookup table shown, the plurality of grouping codes of the power converters PW1, PW3, and PW5 are all "1", thereby determining that the power converters PW1, PW3, and PW5 are classified into the first power group.

[0121] The phase selection circuit of the power supply control system of the tenth embodiment of the present invention is as follows Fig.13 In the master-slave information MSR on the lookup table shown, the multiple master-slave codes of the multiple power converters PW1, PW3, and PW5 classified into the first power group are 1, 0, and 0 respectively, thereby determining that the power converter PW1 is a master power converter, and the other power converters PW1, PW3, and PW5 are each a slave power converter.

[0122] The power supply control system of the tenth embodiment of the present invention is based on Fig.13The data of the power converter PW1 as a main power converter indicated by the lookup table (including the comparison signal of the power converter PW1) is used to control the operation of the multiple power converters PW1, PW3, and PW5. The result is as follows: Fig.14 As shown, the output voltages VOUT1 , VOUT3 , and VOUT5 of the power converters PW1 , PW3 , and PW5 are the same as each other, and the output currents I1 , I3 , and I5 are the same as each other.

[0123] On the other hand, the phase selection circuit of the power supply control system of the tenth embodiment of the present invention is as follows Fig.13 In the grouping information GRP2 of the second power group in the lookup table shown, the multiple grouping codes of the power converters PW2, PW4, and PW6 are all "1", thereby determining that these power converters PW2, PW4, and PW6 are classified into the second power group.

[0124] The phase selection circuit of the power supply control system of the tenth embodiment of the present invention is as follows Fig.13 In the master-slave information MSR on the lookup table shown, the master-slave codes of the multiple power converters PW2, PW4, and PW6 classified into the second power group are 1, 0, and 0 respectively, thereby determining that the power converter PW2 is a master power converter, and the power converters PW4 and PW6 are each a slave power converter.

[0125] The power supply control system of the tenth embodiment of the present invention is based on Fig.13 The data of the power converter PW2 as a main power converter indicated by the lookup table (including the comparison signal of the power converter PW2) is used to control the operation of the multiple power converters PW2, PW4, and PW6. The result is as follows: Fig.14 As shown, the output voltages VOUT2 , VOUT4 , and VOUT6 of the power converters PW2 , PW4 , and PW6 are the same as each other, and the output currents I2 , I4 , and I6 are the same as each other.

[0126] See also Fig.15 and Fig.16 , which is a schematic diagram of group codes and master-slave code data of a power supply control system of a multi-phase power converter according to an eleventh embodiment of the present invention, Fig.16 FIG. 1 is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to an eleventh embodiment of the present invention.

[0127] The similarities between the eleventh embodiment of the present invention and the seventh embodiment are not repeated here.

[0128] The differences between the eleventh embodiment of the present invention and the seventh embodiment are described as follows.

[0129] The phase selection circuit of the power supply control system of the eleventh embodiment of the present invention (whose internal component configuration may be the same as that of the above-mentioned power supply control system) is as follows: Fig.15 In the grouping information GRP1 of the first power group on the lookup table shown, the plurality of grouping codes of the power converters PW1 and PW3 are both "1", and it is determined that the power converters PW1 and PW3 are classified into the first power group.

[0130] The phase selection circuit of the power supply control system of the eleventh embodiment of the present invention is as follows: Fig.15 In the master-slave information MSR shown in the lookup table, the master-slave codes of the power converters PW1 and PW3 classified into the first power group are 1 and 0 respectively, thereby determining that the power converter PW1 is a master power converter and the power converter PW3 is a slave power converter.

[0131] The power supply control system of the eleventh embodiment of the present invention is based on Fig.15 The data of the power converter PW1 as a main power converter indicated by the lookup table (including the comparison signal of the power converter PW1) is used to control the operation of the multiple power converters PW1 and PW3. The result is as follows: Fig.16 As shown, the output voltages VOUT1 and VOUT3 of the power converters PW1 and PW3 are the same as each other, and the output currents I1 and I3 are the same as each other.

[0132] On the other hand, the phase selection circuit of the power supply control system of the eleventh embodiment of the present invention is as follows: Fig.15 In the individual power supply control information SIG on the lookup table shown, the individual handles of the power converters PW2, PW4, PW5, and PW6 are all "1". In this case, the power supply control system of the eleventh embodiment of the present invention will control each of these power converters PW2, PW4, PW5, and PW6 individually. Each of these power converters PW2, PW4, PW5, and PW6 and the others of the multiple power converters PW1 to PW6 can supply power to different external electronic devices.

[0133] The result is, if Fig.16 As shown, the output voltages VOUT2, VOUT4, VOUT5, and VOUT6 of the power converters PW2, PW4, PW5, and PW6 are different from each other and from the output voltage VOUT1 of the power converter PW1. In addition, the output currents I2, I4, I5, and I6 of the power converters PW2, PW4, PW5, and PW6 are different from each other and from the output current I1 of the power converter PW1.

[0134] See also Fig.17 , which is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to the twelfth embodiment of the present invention.

[0135] For example, Figure 1 The input voltage of the multiple power converters PW1 to PW6 shown is 5 V. In this case, the power supply control system of the twelfth embodiment of the present invention (whose internal component configuration is the same as the above-mentioned power supply control system) is as follows: Fig.17 The multiple power converters PW1 to PW6 shown in the figure are controlled to gradually have the same values ​​of their respective output voltages VOUT1 to VOUT6 and their respective output currents I1 to I6 .

[0136] See also Fig.18 , which is a waveform diagram of signals of a power supply control system of a multi-phase power converter according to the thirteenth embodiment of the present invention.

[0137] For example, in the thirteenth embodiment of the present invention, Figure 1 or Figure 3 The multiple power converters PW1 to PW6 shown receive a lower input voltage of 3.8V. In this case, the present invention is as follows Figure 1 or Figure 3 The power supply control system shown in Fig.18 As shown, the values ​​of the output voltages VOUT1 to VOUT6 of the multiple power converters PW1 to PW6 (supplying power to the same external electronic device) are gradually the same, and the values ​​of the output currents I1 to I6 are gradually the same.

[0138] In summary, the present invention provides a power supply control system for a multi-phase power converter. The power supply control system of the present invention groups multiple power converters (supplying power to different external electronic devices or loads) into different power groups, and individually controls the power supply of multiple power converters in each power group, so that the power supply control of different power groups does not interfere with each other. The power supply control system of the present invention selects one of the multiple power converters in the same power group as the main power converter, and the others are each slave power converters, and controls the operation of the main power converter and the slave power converters in the same power group according to the data of the main power converter, for example, controlling multiple power converters in the same power group to supply the same output voltage and output current.

[0139] The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the claims of the present invention. Therefore, all equivalent technical changes made using the description and drawings of the present invention are included in the claims of the present invention.

Claims

1. A power supply control system for a multi-phase power converter, applicable to a plurality of power converters, characterized in that: The power supply control system of the multi-phase power converter comprises: an error amplification circuit connected to each of the power converters and configured to multiply a difference between an output voltage of each of the power converters and a first reference voltage by a gain to output an error amplification signal; A comparison circuit connected to the error amplifier circuit and configured to compare the voltage of the error amplified signal of each power converter with the voltage of a ramp signal to output a comparison signal; a phase selection circuit connected to the comparison circuit and configured to group each of the plurality of power converters into one of a plurality of power groups, select one of the plurality of power converters classified into the same power group as a master power converter, select each of the other power converters as a slave power converter, output the comparison signal of the master power converter as a master phase signal, and output the comparison signal of each slave power converter as a slave phase signal; a multi-phase control circuit connected to the phase selection circuit and configured to output a conduction time control signal according to the main phase signal of the main power converter; as well as The on-time determination circuit is connected to the multi-phase control circuit and each of the power converters, and is configured to set an on-time according to the on-time control signal of the main power converter, and output an on-time signal to each of the power converters classified into the same power group as the main power converter according to the on-time, and each of the multiple power converters operates according to the on-time signal received from the on-time determination circuit.

2. The power supply control system of the multi-phase power converter according to claim 1, characterized in that: Each of the power converters comprises: An upper bridge switch, wherein a first end of the upper bridge switch is coupled to an input voltage; A lower bridge switch, wherein a first end of the lower bridge switch is connected to a second end of the upper bridge switch, a node between the first end of the lower bridge switch and the second end of the upper bridge switch is connected to a first end of an inductor, a second end of the inductor is connected to a first end of a capacitor, and a second end of the capacitor is grounded; A driving circuit connected to the control end of the upper bridge switch and the control end of the lower bridge switch; as well as The control circuit is connected to the driving circuit and the output end of the conduction time determination circuit, and is configured to control the driving circuit to drive the upper bridge switch and the lower bridge switch according to the conduction time signal.

3. The power supply control system of the multi-phase power converter according to claim 1, characterized in that: The multi-phase control circuit obtains a plurality of master-slave codes of the plurality of power converters from a lookup table, and determines which of the plurality of power converters has the comparison signal as the master phase signal according to the plurality of master-slave codes.

4. The power supply control system of the multi-phase power converter according to claim 3, characterized in that: The multi-phase control circuit uses the comparison signal of the power converter whose master-slave code is the first master-slave code as the master phase signal, and uses the comparison signals of the other power converters whose master-slave code is the second master-slave code as the slave phase signal.

5. The power supply control system of the multi-phase power converter according to claim 1, characterized in that: The multiple power converters are classified into multiple power groups. The multi-phase control circuit obtains multiple grouping codes of the multiple power converters from a lookup table, and determines which of the multiple power converters are classified into the same one of the multiple power groups based on the multiple grouping codes.

6. The power supply control system of the multi-phase power converter according to claim 1, characterized in that: The error amplifier circuit includes multiple error amplifiers, the first input terminals of the multiple error amplifiers are respectively connected to the output terminals of the multiple power converters, the second input terminal of each of the error amplifiers is coupled to the first reference voltage, and the output terminals of the multiple error amplifiers are connected to the input terminal of the comparison circuit.

7. The power supply control system of the multi-phase power converter according to claim 6, characterized in that: The comparison circuit includes a plurality of comparators, wherein the first input terminals of the plurality of comparators are respectively connected to the output terminals of the plurality of error amplifiers, the second input terminal of each of the comparators receives the ramp signal from an external ramp signal generator connected thereto, and the output terminals of the plurality of comparators are connected to the input terminal of the phase selection circuit.

8. The power supply control system of the multi-phase power converter according to claim 7, characterized in that: The phase selection circuit comprises a plurality of phase selectors, the input ends of the plurality of phase selectors are respectively connected to the output ends of the plurality of comparators, and the output ends of the plurality of phase selectors are connected to the input end of the multi-phase control circuit; One of the plurality of phase selectors outputs the received comparison signal as the master phase signal according to a master-slave indication signal, and the other plurality of phase selectors outputs the received comparison signal as the slave phase signal.

9. The power supply control system of the multi-phase power converter according to claim 8, characterized in that: The on-time determination circuit includes a plurality of on-time generators, the input ends of the plurality of on-time generators are connected to the output ends of the multi-phase control circuit, and the output ends of the plurality of on-time generators are respectively connected to the input ends of the plurality of power converters.

10. The power supply control system of the multi-phase power converter according to claim 1, characterized in that: The phase selection circuit comprises a plurality of master-slave reference comparison circuits, a logic analysis circuit and a conduction setting circuit, the input ends of the plurality of master-slave reference comparison circuits are connected to the output end of the comparison circuit, the logic analysis circuit is connected to the output end of the master-slave reference comparison circuit and the input end of the conduction setting circuit, and the output end of the conduction setting circuit serves as the output end of the phase selection circuit; The multiple master-slave reference comparison circuits compare the levels of the multiple comparison signals of the multiple power converters with a master-slave code of the master power converter to output multiple master control reference comparison signals respectively. The logic analysis circuit controls the conduction setting circuit to output the conduction time signal to each of the power converters according to the multiple master control reference comparison signals.

11. The power supply control system of the multi-phase power converter according to claim 10, characterized in that: Each of the master-slave reference comparison circuits includes an AND gate. The first input end of each of the multiple AND gates of the multiple master-slave reference comparison circuits obtains the logic value of the master-slave code of the master power converter from a connected table lookup module. The second input ends of the multiple AND gates receive the multiple comparison signals of the multiple power converters from the comparison circuit respectively. The output ends of the multiple AND gates are connected to the input end of the logic analysis circuit.

12. The power supply control system of the multi-phase power converter according to claim 10, characterized in that: Each of the master-slave reference comparison circuits includes a NAND gate and a NOT gate. The first input end of each of the multiple NAND gates of the multiple master-slave reference comparison circuits obtains the logic value of the master-slave code of the master power converter from a connected table lookup module. The second input ends of the multiple NAND gates receive the multiple comparison signals of the multiple power converters from the comparison circuit respectively. The output ends of the multiple NAND gates are respectively connected to the input ends of the multiple NOT gates, and the output ends of the multiple NOT gates are connected to the input end of the logic analysis circuit.

13. The power supply control system of the multi-phase power converter according to claim 10, characterized in that: The phase selection circuit further includes a plurality of grouping comparison circuits, the plurality of grouping comparison circuits are connected to the logic analysis circuit, and the plurality of power converters are classified into a plurality of power groups; Among them, the multiple grouping comparison circuits obtain the multiple grouping codes of the multiple power converters contained in the information of each of the power groups from a connected table lookup module, and each of the grouping comparison circuits compares the two grouping codes of two power converters classified into the same power group to output a grouping comparison signal. The logic analysis circuit determines whether each two of the multiple power converters are classified into the same power group based on the multiple grouping comparison signals respectively received from the multiple grouping comparison circuits, so as to control the conduction setting circuit to output the conduction time signal to each of the power converters.

14. The power supply control system of the multi-phase power converter according to claim 13, characterized in that: Each of the grouping comparison circuits includes an AND gate, and the first input terminal and the second input terminal of each of the plurality of AND gates of the plurality of grouping comparison circuits respectively obtain the logic values ​​of the two grouping codes of two of the plurality of power converters in the information of the same power group from the connected table lookup module, and the output terminals of the plurality of AND gates are connected to the input terminals of the logic analysis circuit.

15. The power supply control system of the multi-phase power converter according to claim 14, characterized in that: Each of the grouping comparison circuits includes a NAND gate and a NOT gate. The first input terminal and the second input terminal of each of the multiple AND gates of the multiple grouping comparison circuits respectively obtain the logical values ​​of the two grouping codes of two of the multiple power converters in the information of the same power group from the connected table lookup module. The output terminals of the multiple NAND gates are respectively connected to the input terminals of the multiple NOT gates, and the output terminals of the multiple NOT gates are connected to the input terminals of the logic analysis circuit.

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