CN112181123B - Device and method for improving output current sharing of hot-plug chip - Google Patents
Device and method for improving output current sharing of hot-plug chip Download PDFInfo
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- CN112181123B CN112181123B CN202011044462.5A CN202011044462A CN112181123B CN 112181123 B CN112181123 B CN 112181123B CN 202011044462 A CN202011044462 A CN 202011044462A CN 112181123 B CN112181123 B CN 112181123B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
- G06F13/4081—Live connection to bus, e.g. hot-plugging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The invention discloses a device for improving the output current sharing of a hot plug chip, which comprises a hot plug circuit, a gate discharge control circuit and a current detection control circuit, wherein the hot plug circuit is connected with the gate discharge control circuit; the hot plug circuit comprises an MOS tube and a current detection resistor; the gate discharge control circuit comprises a charge pump circuit and a gate circuit, and the gate circuit is correspondingly connected with the MOS tube; the current detection control circuit detects the current flowing through the current detection resistor in each group of hot plug circuits and judges the hot plug circuit group with smaller current; the current detection control circuit controls the conduction of the gate circuit and the charge pump circuit, and after the conduction, the gate circuit transmits the voltage of the charge pump circuit to the MOS tube after biasing, thereby reducing the path impedance of the hot plug circuit. Through the mode, the charge pump circuit can be judged and connected to the group with relatively small current, the effect of sorting and equalizing current is achieved, and meanwhile conduction loss on a path can be reduced.
Description
Technical Field
The invention relates to the technical field of hot plugging, in particular to a device and a method for improving the output current sharing of a hot plugging chip.
Background
Hot plugging means that a peripheral device is plugged in or unplugged when a computer runs, the host or the peripheral device cannot be burnt, and a new device can be detected and used in real time. The hot plug function is realized through a hot plug chip, the current hot plug technology is mainly applied to a card or a module, and the working state of the system is not influenced when the hot plug technology is connected to the system through a connector.
Usually, the hot-swap chip includes a driving MOS design and a current detection resistor, which provides the functions of controlling the current rise rate, overcurrent protection, power management, and reporting the voltage and current status via the power management bus, in addition to performing basic hot-swap. The MOS tube and the current detection resistor are connected in series between a power supply and a load, the current detection resistor transmits a signal flowing through the MOS tube to the control circuit, the control circuit controls the conduction of the MOS tube according to the current setting and timing circuit, the high instantaneous current is controlled at a lower and reasonable level, and the instantaneous high current caused by the capacitance at the rear end during hot plugging is avoided from causing system abnormity.
With the development of various power supply architectures and the limitation of system space, how to supply the power required by the back-end power circuit in a multi-group parallel manner without supplying power individually to save space becomes a problem currently faced. As shown in fig. 1, a single hot-plug circuit supplies 3 load points, and the first to fourth hot-plug circuits supply 12 load points together, which may cause non-uniform current condition to affect system operation when connecting excessive hot-plug chips in parallel.
Disclosure of Invention
The invention mainly solves the technical problem of providing a device and a method for improving the output current sharing of a hot-plug chip, which can improve the output current sharing of the hot-plug chip by adjusting the gate voltage and avoid the influence of the non-uniform current condition on the system operation when the system is connected with excessive hot-plug chips in parallel.
In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a promote device that hot plug chip output current flow equalizes, includes: a hot plug circuit, a gate discharge control circuit and a current detection control circuit;
the hot plug circuits are connected in parallel between the power supply end and the load end; each group of hot plug circuits comprises MOS tubes and current detection resistors which are connected in series;
the gate discharge control circuit comprises a charge pump circuit and a plurality of gate circuits connected in parallel, and one group of hot plug circuits corresponds to one gate circuit; the gate circuit is correspondingly connected with an MOS tube in the hot-plug circuit;
the current detection control circuit detects the flowing current of the current detection resistor in each group of hot plug circuits and judges the hot plug circuit group with smaller current; the current detection control circuit controls the conduction of a gate electrode circuit connected to the hot plug circuit with smaller current and the charge pump circuit, after the conduction, the gate electrode circuit transmits the voltage of the charge pump circuit to the MOS tube in the hot plug circuit with smaller current after biasing, and the path impedance of the hot plug circuit with smaller current is reduced.
Furthermore, the gate circuit comprises an NMOS tube, a diode, a triode, a first resistor, a second resistor and a gate switch; the NMOS tube is respectively connected with a base electrode of the triode and an anode of the diode, a cathode of the diode is connected with an emitting electrode of the triode, and one side of the MOS tube in the hot-plug circuit is connected with a lead between the cathode of the diode and the emitting electrode of the triode; one end of the first resistor is connected with the base electrode of the triode, and the other end of the first resistor is grounded; one end of the second resistor is connected with the collector of the triode, and the other end of the second resistor is grounded; one end of the gate switch is connected with the NMOS tube, and the other end of the gate switch is connected with the charge pump circuit.
Further, the charge pump circuit comprises a charging end, a switch array and a capacitor bank, and the charging action of the charging end on the capacitor bank or the discharging action of the capacitor bank is realized by controlling the on-off of the switch array.
Further, the switch array comprises a first switch, a second switch, a third switch and a fourth switch, and the capacitor bank comprises a first capacitor and a second capacitor; the third switch, the first switch, the second switch, the fourth switch and the second capacitor are sequentially connected in series, and the third switch and the second capacitor are respectively grounded; the charging end is connected to a wire between the first switch and the second switch; one end of the first capacitor is connected to a lead between the first switch and the third switch, and the other end of the first capacitor is connected to a lead between the second switch and the fourth switch.
Furthermore, a gate switch connecting end is provided on a lead between the fourth switch and the second capacitor, and the gate switches of the gate circuits are all connected to the gate switch connecting end.
Furthermore, the current detection control circuit comprises a current detector and a plurality of hot plug controllers; each hot-plug controller is respectively connected with the current detection resistors of one group of hot-plug circuits and the NMOS tube of one gate circuit; the current detector is respectively connected with the hot plug controllers, and the connection point of the current detector and the hot plug controllers is positioned on a wire between the hot plug controllers and the current detection resistor.
On the other hand, the method for improving the output current sharing of the hot plug chip comprises the following steps: a gate discharge control circuit and a current detection control circuit are additionally arranged on the hot-swap circuit connected in parallel; the current detection control circuit detects actual flowing current in each group of hot plug circuits, obtains current distribution of all groups of hot plug circuits, and finds out the hot plug circuit group with smaller current; the current detection control circuit is communicated with the gate discharge control circuit to determine the hot plug circuit group for adjusting the gate output voltage and perform the output current boosting step.
The step of raising the output current comprises: the current detection control circuit outputs a gate opening signal to the gate discharge control circuit, the gate discharge control circuit outputs the voltage of the charge pump to the hot plug circuit, so that the gate voltage of the hot plug circuit is increased to two times of a normal value, the drain-source on-state resistance is forced to be reduced, and more current flows to achieve the current equalizing purpose; when the system needs protection, the current detection control circuit cuts off the gate opening signal, and the gate voltage of the hot-swap circuit passes through the gate discharge control circuit ground wire.
The beneficial effects of the invention are: the invention can achieve the effect of more uniform output impedance between each group of hot plug circuits and the load impedance by adjusting the gate voltage, and simultaneously, the overall conduction impedance is reduced by the additional pressurization effect, thereby reducing the conduction loss on the path.
Drawings
FIG. 1 is a schematic diagram of a hot swap circuit with multiple parallel outputs according to the prior art;
FIG. 2 is a schematic diagram of an apparatus for improving current sharing among output currents of a hot-pluggable chip according to the present invention;
FIG. 3 is a schematic diagram illustrating a discharge state of a gate circuit in the device for improving current sharing of hot-swap chip output current according to the present invention;
FIG. 4 is a circuit diagram of a preferred embodiment of a device for improving current sharing among hot-pluggable chips according to the present invention;
FIG. 5 is a flowchart illustrating a method for improving current sharing of hot-swap chip output according to the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 2 to 5, an embodiment of the present invention includes:
the utility model provides a promote device that hot plug chip output current flow equalizes, includes: a hot plug circuit, a gate discharge control circuit and a current detection control circuit; the hot plug circuits are connected in parallel between the power supply end and the load end; each group of hot plug circuits comprises MOS tubes and current detection resistors which are connected in series; the gate discharge control circuit comprises a charge pump circuit and a plurality of gate circuits connected in parallel, and one group of hot plug circuits corresponds to one gate circuit; the gate circuit is correspondingly connected with an MOS tube in the hot-plug circuit; the current detection control circuit detects the flowing current of the current detection resistor in each group of hot plug circuits and judges the hot plug circuit group with smaller current; the current detection control circuit controls the conduction of a gate electrode circuit connected to the hot plug circuit with smaller current and the charge pump circuit, after the conduction, the gate electrode circuit transmits the voltage of the charge pump circuit to the MOS tube in the hot plug circuit with smaller current after biasing, and the path impedance of the hot plug circuit with smaller current is reduced.
The gate circuit comprises an NMOS (N-channel metal oxide semiconductor) tube (Q3), a diode (D1), a triode (Q1), a first resistor (R1), a second resistor (R2) and a gate switch; the NMOS tube is respectively connected with the base electrode of the triode and the anode of the diode, the cathode of the diode is connected with the emitting electrode of the triode, and one side of the MOS tube in the hot-plug circuit is connected with a wire between the cathode of the diode and the emitting electrode of the triode; one end of the first resistor is connected with the base electrode of the triode, and the other end of the first resistor is grounded; one end of the second resistor is connected with the collector of the triode, and the other end of the second resistor is grounded; one end of the gate switch is connected with the NMOS tube, and the other end of the gate switch is connected with the charge pump circuit.
The charge pump circuit comprises a charging end, a switch array and a capacitor bank, and the charging action of the charging end on the capacitor bank or the discharging action of the capacitor bank is realized by controlling the on-off of the switch array. The switch array comprises a first switch, a second switch, a third switch and a fourth switch, and the capacitor bank comprises a first capacitor and a second capacitor; the third switch, the first switch, the second switch, the fourth switch and the second capacitor are sequentially connected in series, and the third switch and the second capacitor are respectively grounded; the charging end is connected to a wire between the first switch and the second switch; one end of the first capacitor is connected to a lead between the first switch and the third switch, and the other end of the first capacitor is connected to a lead between the second switch and the fourth switch. And a gate switch connecting end is provided on a lead between the fourth switch and the second capacitor, and the gate switches of the gate circuits are connected to the gate switch connecting end.
The current detection control circuit comprises a current detector and a plurality of hot plug controllers; each hot plug controller is respectively connected with the current detection resistors of one group of hot plug circuits and the NMOS tube of one gate circuit; the current detector is respectively connected with the hot plug controllers, and the connection point of the current detector and the hot plug controllers is positioned on a wire between the hot plug controllers and the current detection resistor.
The structure introduced by the device can reduce the overall impedance and achieve the current equalizing effect, and meanwhile, the device can also achieve the protection function of the circuit; referring to fig. 3, when the system needs protection, the current detection control circuit will turn off the gate signal to turn off the mosfet, and at this time, the transistor Q1, the PNP bipolar junction transistor, turns on to conduct the hot-swap gate voltage to ground through Q1 and the connecting resistor. When the bjt is on, the current level at the emitter is about one hundred times that at the base, so that the discharge current level can be determined by selecting the resistance to ground R2. The function can ensure that the application can also achieve the protection function of the circuit in each hot plug parallel application circuit.
In the following figure, three groups of hot plug circuits are connected in parallel, and assuming that the path impedance from the left path R _ shunt1 and Mosfet1 to output is the largest, the output current in the three groups of hot plug circuits connected in parallel is the smallest, and after passing through the current detector, the S5 switch is activated so that Vgate1 of Mosfet1 is twice the normal Vgate voltage to force the R _ ds (on) resistance to decrease, and more current flows for the purpose of current sharing.
The main principle of the charge pump circuit is as follows,
when s2, s3 turns on; s1, s4 turned off, the C1 voltage charged to Vgate,
when s2, s3 is turned on; s1, s4 is off, C2 voltage is equal to Vgate + C1 ═ 2 × Vgate;
and outputs a signal to S5 through the hot swap controller, so that the gate voltage Vgate1 of the Mosfet1 is 2 times of Vgate.
When turned off, the gate voltage is rapidly discharged through Q1. The voltage of E of Q1 begins to drop from 2 times Vgate, the voltage of B drops to 2Vgate-0.7V, at this time, Q1 is conducted, and the input capacitor voltage of Mosfet1 discharges rapidly through resistor R2.
On the other hand, the method for improving the output current sharing of the hot plug chip comprises the following steps: a gate discharge control circuit and a current detection control circuit are additionally arranged on the parallel hot-plug circuits, so that under the condition of parallel operation, the actual current flowing in each group of hot-plug circuits can be detected through the current detection control circuit, the current distribution of the hot-plug circuits of all groups is obtained, and the hot-plug circuit group with smaller current is found out; the current detection control circuit is communicated with the gate discharge control circuit to determine the hot plug circuit group for adjusting the output voltage of the gate, and the output current boosting step is carried out. When the gate voltage is larger, the resistance value between two ends of the turned-on D-S is smaller, and conversely, when the gate voltage is smaller, the resistance value between two ends of the turned-on D-S is larger. After the external gate discharge control circuit is connected, the group with smaller output current can have larger gate voltage, the resistance value between the two ends of the D-S after being conducted becomes smaller, the overall path impedance of the hot plug circuit becomes smaller, and the function of overall current equalization is achieved.
The step of raising the output current comprises: the current detection control circuit outputs a gate opening signal to the gate discharge control circuit, the gate discharge control circuit outputs charge pump voltage to the hot plug circuit, so that the gate voltage of the hot plug circuit is increased to two times of a normal value, the drain-source on-state resistance Rds (on) is forced to be reduced, and more current flows to achieve the purpose of current equalization; when the system needs protection, the current detection control circuit cuts off the gate opening signal, and the gate voltage of the hot-swap circuit passes through the gate discharge control circuit ground wire. Different from the prior art, the invention feeds back the current output state through a feedback design, and confirms the hot plug group with smaller current distribution after reading the current distribution state. By increasing the gate voltage, Rds (on) is reduced, so that the overall impedance of the path is adjusted, and the current sharing effect is increased.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (6)
1. The utility model provides a promote device that hot plug chip output current flow equalizes which characterized in that includes: a hot plug circuit, a gate discharge control circuit and a current detection control circuit;
the hot plug circuits are connected in parallel between the power supply end and the load end; each group of hot plug circuits comprises MOS tubes and current detection resistors which are connected in series;
the gate discharge control circuit comprises a charge pump circuit and a plurality of gate circuits connected in parallel, and one group of hot plug circuits corresponds to one gate circuit; the gate circuit is correspondingly connected with an MOS tube in the hot-plug circuit;
the current detection control circuit detects the flowing current of the current detection resistor in each group of hot plug circuits and judges the hot plug circuit group with smaller current; the current detection control circuit controls the conduction of a gate electrode circuit connected to the hot plug circuit with smaller current and the charge pump circuit, after the conduction, the gate electrode circuit transmits the voltage of the charge pump circuit to an MOS (metal oxide semiconductor) tube in the hot plug circuit with smaller current after biasing, and the path impedance of the hot plug circuit with smaller current is reduced;
the gate circuit comprises an NMOS tube, a diode, a triode, a first resistor, a second resistor and a gate switch; the NMOS tube is respectively connected with a base electrode of the triode and an anode of the diode, a cathode of the diode is connected with an emitting electrode of the triode, and one side of the MOS tube in the hot-plug circuit is connected with a lead between the cathode of the diode and the emitting electrode of the triode; one end of the first resistor is connected with the base electrode of the triode, and the other end of the first resistor is grounded; one end of the second resistor is connected with the collector of the triode, and the other end of the second resistor is grounded; one end of the gate switch is connected with the NMOS tube, and the other end of the gate switch is connected with the charge pump circuit.
2. The device for improving current sharing of hot plug chip output current according to claim 1, wherein: the charge pump circuit comprises a charging end, a switch array and a capacitor bank, and the charging action of the charging end on the capacitor bank or the discharging action of the capacitor bank is realized by controlling the on-off of the switch array.
3. The device according to claim 2, wherein the device for improving current sharing of the hot-pluggable chip comprises: the switch array comprises a first switch, a second switch, a third switch and a fourth switch, and the capacitor bank comprises a first capacitor and a second capacitor; the third switch, the first switch, the second switch, the fourth switch and the second capacitor are sequentially connected in series, and the third switch and the second capacitor are respectively grounded; the charging end is connected to a wire between the first switch and the second switch; one end of the first capacitor is connected to a lead between the first switch and the third switch, and the other end of the first capacitor is connected to a lead between the second switch and the fourth switch.
4. The device for improving current sharing of hot plug chip output current according to claim 3, wherein: and a gate switch connecting end is provided on a lead between the fourth switch and the second capacitor, and the gate switches of the gate circuits are connected to the gate switch connecting end.
5. The device for improving current sharing of hot plug chip output current according to claim 4, wherein: the current detection control circuit comprises a current detector and a plurality of hot plug controllers; each hot-plug controller is respectively connected with the current detection resistors of one group of hot-plug circuits and the NMOS tube of one gate circuit; the current detector is respectively connected with the hot plug controllers, and the connection points of the current detector and the hot plug controllers are positioned on the wires between the hot plug controllers and the current detection resistors.
6. A method for improving output current sharing of a hot-plug chip is characterized by comprising the following steps: a gate discharge control circuit and a current detection control circuit are additionally arranged on the hot-swap circuit connected in parallel; the current detection control circuit detects actual flowing current in each group of hot plug circuits, obtains current distribution of all groups of hot plug circuits, and finds out the hot plug circuit group with smaller current; the current detection control circuit is communicated with the gate electrode discharge control circuit to determine a hot plug circuit group for adjusting the output voltage of the gate electrode and carry out an output current boosting step;
the step of boosting the output current includes: the current detection control circuit outputs a gate opening signal to the gate discharge control circuit, the gate discharge control circuit outputs the voltage of the charge pump to the hot plug circuit, so that the gate voltage of the hot plug circuit is increased to two times of a normal value, the drain-source on-state resistance is forced to be reduced, and more current flows to achieve the current equalizing purpose; when the system needs protection, the current detection control circuit cuts off the gate opening signal, and the gate voltage of the hot-swap circuit passes through the gate discharge control circuit ground wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011044462.5A CN112181123B (en) | 2020-09-28 | 2020-09-28 | Device and method for improving output current sharing of hot-plug chip |
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| CN202011044462.5A CN112181123B (en) | 2020-09-28 | 2020-09-28 | Device and method for improving output current sharing of hot-plug chip |
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| CN112181123B true CN112181123B (en) | 2022-07-12 |
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| CN115459204B (en) * | 2022-11-10 | 2023-02-28 | 苏州浪潮智能科技有限公司 | Parallel HSC chip fault processing device, method, equipment and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102156525A (en) * | 2011-03-11 | 2011-08-17 | 福建星网锐捷网络有限公司 | Method, circuit and device for controlling hot plug of power supply |
| CN204131085U (en) * | 2014-10-24 | 2015-01-28 | 杭州矽溪微电子有限公司 | Based on the battery system anti-surge circuit of hot plug chip |
| CN204634138U (en) * | 2015-06-11 | 2015-09-09 | 深圳市暗能量电源有限公司 | Be applied to the LED control circuit of hot plug |
| CN210804388U (en) * | 2019-12-27 | 2020-06-19 | 纽福克斯光电科技（上海）有限公司 | Hot plug detection circuit and electronic equipment |
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2020
- 2020-09-28 CN CN202011044462.5A patent/CN112181123B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156525A (en) * | 2011-03-11 | 2011-08-17 | 福建星网锐捷网络有限公司 | Method, circuit and device for controlling hot plug of power supply |
| CN204131085U (en) * | 2014-10-24 | 2015-01-28 | 杭州矽溪微电子有限公司 | Based on the battery system anti-surge circuit of hot plug chip |
| CN204634138U (en) * | 2015-06-11 | 2015-09-09 | 深圳市暗能量电源有限公司 | Be applied to the LED control circuit of hot plug |
| CN210804388U (en) * | 2019-12-27 | 2020-06-19 | 纽福克斯光电科技（上海）有限公司 | Hot plug detection circuit and electronic equipment |
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