CN209657254U - A kind of south bridge voltage module and computer - Google Patents
A kind of south bridge voltage module and computer Download PDFInfo
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- CN209657254U CN209657254U CN201920241471.XU CN201920241471U CN209657254U CN 209657254 U CN209657254 U CN 209657254U CN 201920241471 U CN201920241471 U CN 201920241471U CN 209657254 U CN209657254 U CN 209657254U
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Abstract
It includes bidirectional power supply circuit, chip power supply circuit and voltage conversion circuit that the utility model embodiment, which discloses a kind of south bridge voltage module and computer, south bridge voltage module,；Bidirectional power supply circuit connection voltage conversion circuit and power module, chip power supply circuit connect voltage conversion circuit and power module, and voltage conversion circuit connects south bridge；Bidirectional power supply circuit gives voltage conversion circuit single service according to the standby voltage that power module first exports, the standby voltage and system voltage exported further according to power module supplies power with double circuit to voltage conversion circuit, and chip power supply circuit provides operating voltage for voltage conversion circuit；Voltage conversion circuit first generates south bridge voltage according to standby voltage and powers to south bridge, then generates south bridge voltage according to standby voltage and system voltage and powers to south bridge.Since standby voltage and system voltage are directly powered, the electronic component quantity that can remove existing voltage generation circuit to use is reduced, and circuit is simpler and reduces pcb board size.
Description
Technical field
The utility model relates to electronic technology field more particularly to a kind of south bridge voltage modules and computer.
Background technique
Computer is one of the most advanced inventions of science and technology in the 20th century, generates to the production activity and social activities of the mankind
Extremely important influence, and develop rapidly with strong vitality.It is answered from initial military research in computer application field
With the every field for expanding to society, huge computer industry is formd, the technological progress of global range has been driven,
Thus deep social change has been caused.Computer has spread general school, enterprises and institutions, and enters common people house, at
For tool essential in information-intensive society.
The south bridge of mainboard is one of important component of mainboard, and main function is responsible for some peripheral hardwares such as I/O interface
The control of interface, the control of IDE (Integrated Drive Electronics) equipment and additional function etc., supply voltage
It is the foundation stone of mainboard steady operation.The quality of supply voltage performance, directly affects the stability of other equipment work, and then influences
The stability of complete machine.
Turn shown in south bridge input voltage+5VD circuit and Fig. 2 also referring to existing+5VSB shown in FIG. 1 and+5VS
Existing south bridge supply voltage+1V0_PCH circuit.In voltage generation circuit, by+5VSB voltage (the i.e. Standby+ of ATX power supply
5VSB input) it is electric as the dual input of control chip Ua (model UP7501) with+5VS (i.e. System+5VS input) voltage
Pressure, control signal (SIO_GP55, SLP_S3-, SLP_S5_N) control control chip U output mos driving signal (5VCC_DRV,
5VSB_DRV) PMOS tube and NMOS tube is driven to work, output+5VD is electric as the input of voltage conversion circuit (as shown in Figure 2)
Pressure, meets south bridge voltage electrifying timing sequence and application requirement.
When ATX power switch K is opened ,+5VSB voltage is generated, and is operated alone PMOS work by+5VSB during this, and output+
5VD voltage.When ATX power switch K and mainboard switch are opened simultaneously ,+5VSB voltage and the+5VS voltage of ATX power supply have been produced
Raw, two groups of voltages respectively drive PMOS tube and NMOS tube works, output+5VD voltage.+ 5VD voltage is input to voltage and turns after generating
Drian (leakage) pole for changing High side MOSFET QP1 in circuit drives High through PWM chip (model UP801) Ub
Two MOSFET work of side/Low side (QP2), export south bridge voltage+1V0_PCH and power to south bridge.
But the complex circuit of existing power supply module, number of parts is more, and (Bill of Material, material are clear by BOM
It is single) higher cost, occupancy pcb board space is big, and Switching Power Supply loss is big, and engineer is in Layout (wiring) and Debug (debugging)
When spend the time it is longer, and influence production efficiency, lack market competition advantage.
Utility model content
In view of the above technical problems, the utility model embodiment provides a kind of south bridge voltage module and computer, with solution
Certainly existing power supply module complex circuit and part is more, cause pcb board size increase the problem of.
The utility model embodiment provides a kind of south bridge voltage module, connects south bridge and power module comprising two-way confession
Circuit, chip power supply circuit and voltage conversion circuit；
The bidirectional power supply circuit gives voltage conversion circuit single service according to the standby voltage that power module first exports, then
The standby voltage and system voltage exported according to power module supplies power with double circuit to voltage conversion circuit, and chip power supply circuit is voltage
Conversion circuit provides operating voltage；Voltage conversion circuit first generates south bridge voltage according to standby voltage and powers to south bridge, then root
South bridge voltage is generated according to standby voltage and system voltage to power to south bridge；
The bidirectional power supply circuit connection voltage conversion circuit and power module, chip power supply circuit connect voltage conversion electricity
Road and power module, the voltage conversion circuit connect south bridge.
Optionally, in the south bridge voltage module, the bidirectional power supply circuit includes first diode, the two or two pole
Pipe, first capacitor and the second capacitor；
The system voltage output end of the anode connection power module of the first diode, the anode connection of the second diode
The standby voltage output end of power module；The cathode of first diode connect the cathode of the second diode, first capacitor one end,
One end of second capacitor and voltage conversion circuit；The other end of the other end of first capacitor and the second capacitor is grounded.
Optionally, in the south bridge voltage module, the chip power supply circuit includes first resistor, second resistance,
Three triodes, the 4th triode and third capacitor；
The anode and standby voltage output end of one end connection third transistor of the first resistor；First resistor it is another
Cathode, the cathode of the 4th triode and one end of second resistance of end connection third transistor；The anode connection of 4th triode
Reserved voltage output end；The other end connection voltage conversion circuit of second resistance also passes through third capacity earth.
Optionally, in the south bridge voltage module, the voltage conversion circuit includes PWM chip, the first metal-oxide-semiconductor,
Two metal-oxide-semiconductors, inductance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance,
4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor and the 8th capacitor；
The OCSET foot of the PWM chip connects the one of one end of the 6th resistance, one end of the 5th capacitor and the 5th resistance
End；The other end of 5th resistance connects the other end of the 8th capacitor and the PHASE foot of PWM chip, and the other end of the 6th resistance is logical
Cross the 6th capacity earth, the other end ground connection of the 5th capacitor；The FB foot of PWM chip connects the another of inductance by 3rd resistor
End also passes through the 4th resistance eutral grounding；4th capacitor is in parallel with 3rd resistor, and the BOOT foot of PWM chip is connected by the 7th resistance
One end of 8th capacitor, the UGATE foot of PWM chip connect one end of the 9th resistance and the grid of the first metal-oxide-semiconductor by the 8th resistance
Pole；The PHASE foot of PWM chip connects the other end, the source electrode of the first metal-oxide-semiconductor and one end of inductance of the 9th resistance；PWM chip
LGATE foot connects the grid of the second metal-oxide-semiconductor, the source electrode of drain electrode the first metal-oxide-semiconductor of connection of the second metal-oxide-semiconductor, the source electrode of the second metal-oxide-semiconductor
Ground connection, the cathode of the drain electrode connection first diode of the first metal-oxide-semiconductor；The output end and the of the other end connection south bridge voltage of inductance
One end of seven capacitors, the other end ground connection of the 7th capacitor.
Optionally, in the south bridge voltage module, the voltage conversion circuit further includes the tenth resistance and the 11st electricity
Resistance；
One end of tenth resistance connects the grid of the second metal-oxide-semiconductor, the other end connection PWM chip of the tenth resistance
LGATE foot also passes through eleventh resistor ground connection.
Optionally, in the south bridge voltage module, the voltage conversion circuit further include the 9th capacitor, the tenth capacitor,
11st capacitor, the 12nd capacitor and twelfth resistor；
One end of 9th capacitor connects one end, one end of the 11st capacitor and the output of south bridge voltage of the tenth capacitor
End；The other end of 9th capacitor, the tenth capacitor and the 11st capacitor is grounded, and one end of twelfth resistor connects the first metal-oxide-semiconductor
Source electrode and inductance one end, the other end of twelfth resistor passes through the 12nd capacity earth.
Optionally, in the south bridge voltage module, the first diode and the second diode are patch Schottky two
Pole pipe.
Optionally, in the south bridge voltage module, the model RT8120A of the PWM chip.
Optionally, in the south bridge voltage module, the third transistor and the 4th triode are semiconductor diode.
The utility model embodiment second aspect provides a kind of computer, including a circuit board, sets on the circuit board
It is equipped with power module and south bridge, wherein also set up the south bridge voltage module；The south bridge voltage module connects power module
And south bridge；
Standby voltage, output system when detection motherboard power supply is opened are exported when the power module detection ATX electric power starting
Voltage；South bridge voltage module first generates south bridge voltage according to standby voltage and powers to south bridge, then according to standby voltage and system
Voltage generates south bridge voltage and powers to south bridge.
In technical solution provided by the embodiment of the utility model, computer includes a circuit board, is arranged on the circuit board
There is the south bridge of power module, south bridge voltage module and mainboard, south bridge voltage module includes bidirectional power supply circuit, chip power supply circuit
And voltage conversion circuit；The bidirectional power supply circuit connection voltage conversion circuit and power module, chip power supply circuit connection electricity
Voltage conversion circuit and power module, the voltage conversion circuit connect south bridge；Bidirectional power supply circuit is first exported according to power module
Standby voltage give voltage conversion circuit single service, the standby voltage and system voltage exported further according to power module is to voltage
Conversion circuit supplies power with double circuit, and chip power supply circuit provides operating voltage for voltage conversion circuit；Voltage conversion circuit first according to
Electromechanics pressure generates south bridge voltage and powers to south bridge, then generates south bridge voltage according to standby voltage and system voltage and supplies to south bridge
Electricity.Since standby voltage and system voltage are directly powered, can remove compared with existing scheme existing voltage generation circuit to
The electronic component quantity used is reduced, and circuit is simpler and reduces pcb board size.
Detailed description of the invention
Fig. 1 is that existing+5VSB and+5VS turn south bridge input voltage+5VD circuit diagram.
Fig. 2 is existing south bridge supply voltage+1V0_PCH circuit diagram.
Fig. 3 is the structural schematic diagram of computer in the utility model embodiment.
Fig. 4 is south bridge supply voltage+1V0_PCH circuit diagram in the utility model embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.The embodiments of the present invention, those skilled in the art are obtained without creative efforts
Every other embodiment, fall within the protection scope of the utility model.
Referring to Fig. 3, computer provided by the embodiment of the utility model includes a circuit board (mainboard of such as computer), it is described
The south bridge 30 of power module 10, south bridge voltage module 20 and mainboard is provided on circuit board；The south bridge voltage module 20 connects
Power module 10 and south bridge 30；The power module 10 exports standby voltage+5VSB when detecting ATX electric power starting, detects mainboard
Output system voltage+5VS when electric power starting；South bridge voltage module 20 first generates south bridge voltage+1V0_ according to standby voltage+5VSB
PCH powers to south bridge 30, then generates south bridge voltage+1V0_PCH to south bridge according to standby voltage+5VSB and system voltage+5VS
30 power supplies.
The south bridge voltage module 20 (being also south bridge supply voltage+1V0_PCH circuit) include bidirectional power supply circuit 210,
Chip power supply circuit 220 and voltage conversion circuit 230；The bidirectional power supply circuit 210 connects voltage conversion circuit 230 and power supply
Module, chip power supply circuit 220 connect voltage conversion circuit 230 and power module, and the voltage conversion circuit 230 connects south bridge
30.The bidirectional power supply circuit 210 gives voltage conversion circuit 230 single channel according to the standby voltage+5VSB that power module first exports
Power supply is supplied further according to export standby voltage+5VSB and system voltage+5VS that power module exports to voltage conversion circuit two-way
Electricity, chip power supply circuit 220 are that voltage conversion circuit 230 provides operating voltage；Voltage conversion circuit 230 is first according to standby voltage
+ 5VSB generates south bridge voltage+1V0_PCH and powers to south bridge 30, is then generated according to standby voltage+5VSB and system voltage+5VS
South bridge voltage+1V0_PCH powers to south bridge 30.Since standby voltage+5VSB and system voltage+5VS directly power, with existing side
Case is simpler compared to circuit, the electronic component negligible amounts that can remove voltage generation circuit shown in FIG. 1 to use, can
BOM cost is effectively reduced, facilitates engineer Layout and Debug, and plant produced efficiency can be improved.
It is to be appreciated that the computer is preferably the computer based on Intel X86 platform motherboard, other platforms master
The computer of plate is also applicable.The south bridge 30 of the power module 10 (i.e. ATX power supply) and mainboard is the prior art, herein to it
Particular circuit configurations are not described further.+ 12VS system electricity is also generated by ATX power supply, is mainly used for giving mainboard PCIE (PCI-
Express) the peripheral hardwares power supply such as pedestal (connection independent display card, network interface card etc.), cpu fan；In the present embodiment as reserved voltage
Input.
Referring to Figure 4 together, the bidirectional power supply circuit 210 includes first diode D1, the second diode D2, the first electricity
Hold C1 and the second capacitor C2；System voltage output end (the input system of the anode connection power module 10 of the first diode D1
Unite voltage+5VS), the second diode D2 anode connection power module 10 standby voltage output end (input standby voltage+
5VSB)；The cathode connection cathode of the second diode D2 of first diode D1, one end of first capacitor C1, the second capacitor C2
One end and voltage conversion circuit 230；The other end of the other end of first capacitor C1 and the second capacitor C2 are grounded.
Wherein, the first diode D1 and the second diode D2 uses the patch Schottky diode of model B340A.
First capacitor C1 uses capacitance for 0.1 μ F, the C0402 patch capacitor of specification X5R, 16V.Second capacitor C2 use specification for
The DIP capacitor of 560 μ F/6.3V.The south bridge input voltage of the present embodiment uses standby voltage+5VSB (ATX Standby+5VSB)
Bidirectional power supply is carried out with system voltage+5VS (System+5VS).By the way that standby voltage+5VSB and system voltage+5VS is distinguished
A diode is concatenated, increases outside line without such as the prior art, is directly given by standby voltage+5VSB and system voltage+5VS
Voltage conversion circuit provides input voltage.
In order to keep south bridge voltage+1V0_PCH more stable, input voltage just must be more stable, in the specific implementation, also
It is 10 μ F, the C0603 patch capacitor of specification X5R, 6.3V and the first electricity that several (3 as shown in Figure 4) capacitances, which are arranged,
It is in parallel to hold C1, to be filtered smoothly to input voltage.
The chip power supply circuit 220 includes first resistor R1, second resistance R2, third transistor D3, the 4th triode
D4 and third capacitor C3；The anode and standby voltage output end of one end connection third transistor D3 of the first resistor R1 is (defeated
Enter standby voltage+5VSB)；The other end of first resistor R1 connects the cathode of the cathode of third transistor D3, the 4th triode D4
With one end of second resistance R2；The anode of 4th triode D4 connects reserved voltage output end (inputting reserved voltage+12VS)；The
The other end connection voltage conversion circuit 230 of two resistance R2 also passes through third capacitor C3 ground connection.
Wherein, third capacitor C3 uses capacitance for 2.2 μ F, the C0805 patch capacitor of specification X5R, 16V.Three or three pole
Pipe D3 and the 4th triode D4 use the forward voltage of model BAT54C for the semiconductor diode of 320mV.Standby voltage+
After 5VSB is by first resistor R1 and second resistance R2 current limliting, third capacitor C3 filtering, to the PWM in voltage conversion circuit 230
Chip provides operating voltage, stablizes PWM chip and works normally, to generate south bridge voltage+1V0_PCH.
The voltage conversion circuit 230 includes PWM chip U, the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, inductance L, third electricity
Hinder R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the 4th electricity
Hold C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7 and the 8th capacitor C8；The OCSET foot connection the of the PWM chip U
One end, one end of the 5th capacitor C5 and one end of the 5th resistance R5 of six resistance R6；The other end connection the 8th of 5th resistance R5
The other end of the other end of capacitor C8 and the PHASE foot of PWM chip U, the 6th resistance R6 is grounded by the 6th capacitor C6, the 5th electricity
Hold the other end ground connection of C5；The FB foot of PWM chip U passes through the other end of 3rd resistor R3 connection inductance L, also passes through the 4th resistance
R4 ground connection；4th capacitor C4 is in parallel with 3rd resistor R3, and the BOOT foot of PWM chip U passes through the 8th capacitor of the 7th resistance R7 connection
The UGATE foot of one end of C8, PWM chip U passes through one end of the 9th resistance R9 of the 8th resistance R8 connection and the grid of the first metal-oxide-semiconductor Q1
Pole G；The PHASE foot of PWM chip U connects the other end, the source S of the first metal-oxide-semiconductor Q1 and one end of inductance L of the 9th resistance R9；
The LGATE foot of PWM chip U connects the grid G of the second metal-oxide-semiconductor Q2, and the drain D of the second metal-oxide-semiconductor Q2 connects the source of the first metal-oxide-semiconductor Q1
The source S of pole S, the second metal-oxide-semiconductor Q2 are grounded, the cathode of the drain electrode connection first diode D1 of the first metal-oxide-semiconductor Q1；Inductance L's is another
One end connects one end of output end (the output south bridge voltage+1V0_PCH) and the 7th capacitor C7 of south bridge voltage, the 7th capacitor C7's
Other end ground connection.
Wherein, the model of PWM chip U is preferably RT8120A.5th capacitor C5 (capacitance is preferably 10pF), the 6th capacitor
C6 (capacitance is preferably 0.01 μ F), the 5th resistance R5 (resistance value is preferably 16K Ω) and the 6th resistance R6 (resistance value is preferably 27K Ω)
Compensated line is formed, opens or closes work for controlling PWM chip U.3rd resistor R3 (resistance value is preferably 2.2K Ω), the 4th
Resistance R4 (resistance value is preferably 2.7K Ω) and the 4th capacitor C4 (capacitance is preferably 1000pF) forms feedback line, detects for playing
Survey or adjust the effect of output voltage (i.e. south bridge voltage+1V0_PCH).First metal-oxide-semiconductor Q1 be High side MOSFET, second
Metal-oxide-semiconductor Q2 is Low side MOSFET.The partial pressure of 8th resistance R8 and the 9th resistance R9, which generates pressure drop, leads the first metal-oxide-semiconductor Q1
It is logical.Short-circuit tie point SHORT distinguishes both ends heterogeneous networks signal in line map in two end signal of communication line, short circuit
Tie point SHORT is voltage feedback signal close to one end of PWM chip FB foot, and the other end is south bridge south bridge+1V0_PCH.Fig. 4
In, power supply guides signal V1P0A_BOOT to be used to provide driving power to High sideMOSFET grid.V1P0_HG is indicated
The driving signal of High side MOSFET grid, control High side MOSFET's opens or closes, moreover it is possible to High
Side MOSFET shields.V1P0A_LG indicates Low side MOSFET gate drive signal, controls Low
SideMOSFET's opens or closes, moreover it is possible to shield to Low side MOSFET.Input PWM chip U's on VCC foot
Operating voltage；FB foot input voltage feedback signal, for detecting or adjusting output voltage.Enable signal 1V0_PCH_EN is for controlling
PWM chip U processed opens or closes work.PHASE foot output switching section point signal.
When ATX power switch is opened, power module 10 only exports standby voltage+5VSB and individually inputs confession to south bridge at this time
Electricity controls two MOSFET work of driving High/low side through PWM chip U, exports south bridge voltage+1V0_PCH to mainboard
South bridge 30 is powered, while also meeting Intel SPEC south bridge electrifying timing sequence requirement.
When ATX power supply and motherboard power supply switch are opened, ATX power supply generation system voltage+5VS at this time, by A standby voltage
+ 5VSB and system voltage+5VS bidirectional power supply control two MOSFET work of driving High/low side through PWM chip U, defeated
South bridge voltage+1V0_PCH powers to the south bridge 30 of mainboard out, while meeting Intel SPEC south bridge electrifying timing sequence and working and answering
With.
Because the standby voltage+5VSB of conventional ATX power supply can only support 2A or so electric current to export, south bridge can not fully met just
Normal job applications, but can satisfy Intel SPEC south bridge Standby voltage (this for only input standby voltage+5VSB generate+
1V0_PCH) electrifying timing sequence requirement.And system voltage+the 5VS generated later can support that 20A or more electric current exports, and can fully meet
South bridge works normally application.
In further embodiment, in order to protect the second metal-oxide-semiconductor Q2, the voltage conversion circuit 230 further includes the tenth resistance
One end of R10 and eleventh resistor R11, the tenth resistance R10 connect the grid G of the second metal-oxide-semiconductor Q2, the tenth resistance R10's
The LGATE foot of other end connection PWM chip U is also grounded by eleventh resistor R11.Tenth resistance R10 and eleventh resistor
The current limliting partial pressure of R11 can avoid high current and burn out the second metal-oxide-semiconductor Q2.
In further embodiment, in order to keep south bridge voltage+1V0_PCH more stable, the voltage conversion circuit 230 is also wrapped
Include the 9th capacitor C9 (capacitance is preferably 0.1 μ F), the tenth capacitor C10 (capacitance is preferably 1 μ F), the 11st capacitor C11 (capacitance compared with
Good is 10 μ F), the 12nd capacitor C12 (capacitance is preferably 4700pF, specification X7R, 50V) and twelfth resistor R12；Described
The output end that one end of nine capacitor C9 connects one end of the tenth capacitor C10, one end of the 11st capacitor C11 and south bridge voltage is (defeated
South bridge voltage+1V0_PCH out)；The other end of 9th capacitor C9, the tenth capacitor C10 and the 11st capacitor C11 are grounded, and the tenth
One end of two resistance R12 connects the source S of the first metal-oxide-semiconductor Q1 and one end of inductance L, and the other end of twelfth resistor R12 passes through
12nd capacitor C12 ground connection.
Please continue to refer to Fig. 4, the present embodiment utilizes diode unilateal conduction characteristic, by the standby voltage+5VSB of AXT power supply
Pass through a diode (D1 and D2) output respectively with system voltage+5VS.When ATX electric power starting, by standby voltage+5VSB
South bridge voltage+1V0_PCH input power supply is individually given, when motherboard power supply is opened, the system voltage+5VS of ATX power supply is generated therewith,
It is powered simultaneously by standby voltage+5VSB and system voltage+5VS at this time.Input is provided directly to south bridge voltage+1V0_PCH in this way
Voltage keeps system operation more stable, while being also able to satisfy Intel SPEC south bridge electrifying timing sequence and application demand.
In conclusion south bridge voltage module provided by the utility model and computer, using diode characteristic, according to ATX
The open state of power supply and motherboard power supply is first individually given south bridge voltage input to power by standby voltage, then by standby voltage and
System voltage is powered simultaneously, using direct feeding system, without increasing any outside line, moreover it is possible to meet the power supply design of platform
It is required that.Circuit is simpler compared with existing scheme, and the electronic component negligible amounts used can effectively reduce BOM cost, convenient
Engineer Layout and Debug, and plant produced efficiency can be improved.Cost can also be rationally effectively reduced, is dropped than existing cost
Low 70% (1PCS mainboard about saves 2 yuan of RMB), meets original design intention.Low cost crosses Intel SPEC power source design to client
Bring more selections, and make mainboard performance be effectively played, there is extremely strong market competition advantage, while facilitating client
Use, product profit space is bigger, with extensive, can be used as professional standard route and is promoted, while being also futuristic design
Trend.
Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality
Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
It encloses.
Claims (10)
1. a kind of south bridge voltage module connects south bridge and power module, which is characterized in that supplied including bidirectional power supply circuit, chip
Circuit and voltage conversion circuit；
The bidirectional power supply circuit gives voltage conversion circuit single service according to the standby voltage that power module first exports, further according to
The standby voltage and system voltage that power module exports supply power with double circuit to voltage conversion circuit, and chip power supply circuit is voltage conversion
Circuit provides operating voltage；Voltage conversion circuit first according to standby voltage generate south bridge voltage give south bridge power, then according to
Electromechanics pressure and system voltage generate south bridge voltage and power to south bridge；
The bidirectional power supply circuit connection voltage conversion circuit and power module, chip power supply circuit connect voltage conversion circuit and
Power module, the voltage conversion circuit connect south bridge.
2. south bridge voltage module according to claim 1, which is characterized in that the bidirectional power supply circuit includes the one or two pole
Pipe, the second diode, first capacitor and the second capacitor；
The system voltage output end of the anode connection power module of the first diode, the anode connection power supply of the second diode
The standby voltage output end of module；The cathode of first diode connects the cathode of the second diode, one end of first capacitor, second
One end of capacitor and voltage conversion circuit；The other end of the other end of first capacitor and the second capacitor is grounded.
3. south bridge voltage module according to claim 2, which is characterized in that the chip power supply circuit includes the first electricity
Resistance, second resistance, third transistor, the 4th triode and third capacitor；
The anode and standby voltage output end of one end connection third transistor of the first resistor；The other end of first resistor connects
Connect the cathode, the cathode of the 4th triode and one end of second resistance of third transistor；The anode connection of 4th triode is reserved
Voltage output end；The other end connection voltage conversion circuit of second resistance also passes through third capacity earth.
4. south bridge voltage module according to claim 3, which is characterized in that the voltage conversion circuit include PWM chip,
First metal-oxide-semiconductor, the second metal-oxide-semiconductor, inductance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th electricity
Resistance, the 9th resistance, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor and the 8th capacitor；
The OCSET foot of the PWM chip connects one end, one end of the 5th capacitor and one end of the 5th resistance of the 6th resistance；The
The other end of five resistance connects the other end of the 8th capacitor and the PHASE foot of PWM chip, and the other end of the 6th resistance passes through the 6th
Capacity earth, the other end ground connection of the 5th capacitor；The FB foot of PWM chip is connected the other end of inductance by 3rd resistor, also led to
Cross the 4th resistance eutral grounding；4th capacitor is in parallel with 3rd resistor, and the BOOT foot of PWM chip connects the 8th capacitor by the 7th resistance
One end, the UGATE foot of PWM chip connects one end of the 9th resistance and the grid of the first metal-oxide-semiconductor by the 8th resistance；PWM core
The PHASE foot of piece connects the other end, the source electrode of the first metal-oxide-semiconductor and one end of inductance of the 9th resistance；The LGATE foot of PWM chip
The grid of the second metal-oxide-semiconductor, the source electrode of drain electrode the first metal-oxide-semiconductor of connection of the second metal-oxide-semiconductor are connected, the source electrode of the second metal-oxide-semiconductor is grounded, the
The cathode of the drain electrode connection first diode of one metal-oxide-semiconductor；The output end and the 7th capacitor of the other end connection south bridge voltage of inductance
One end, the 7th capacitor the other end ground connection.
5. south bridge voltage module according to claim 4, which is characterized in that the voltage conversion circuit further includes the tenth electricity
Resistance and eleventh resistor；
One end of tenth resistance connects the grid of the second metal-oxide-semiconductor, the LGATE of the other end connection PWM chip of the tenth resistance
Foot also passes through eleventh resistor ground connection.
6. south bridge voltage module according to claim 5, which is characterized in that the voltage conversion circuit further includes the 9th electricity
Appearance, the tenth capacitor, the 11st capacitor, the 12nd capacitor and twelfth resistor；
One end of 9th capacitor connects one end, one end of the 11st capacitor and the output end of south bridge voltage of the tenth capacitor；
The other end of 9th capacitor, the tenth capacitor and the 11st capacitor is grounded, and one end of twelfth resistor connects the source of the first metal-oxide-semiconductor
The other end of one end of pole and inductance, twelfth resistor passes through the 12nd capacity earth.
7. south bridge voltage module according to claim 2, which is characterized in that the first diode and the second diode are
Patch Schottky diode.
8. south bridge voltage module according to claim 4, which is characterized in that the model RT8120A of the PWM chip.
9. south bridge voltage module according to claim 3, which is characterized in that the third transistor and the 4th triode are
Semiconductor diode.
10. a kind of computer, including a circuit board, power module and south bridge are provided on the circuit board, which is characterized in that also
Setting such as the described in any item south bridge voltage modules of claim 1-9；The south bridge voltage module connection power module and south bridge；
Standby voltage, output system voltage when detection motherboard power supply is opened are exported when the power module detection ATX electric power starting；
South bridge voltage module first generates south bridge voltage according to standby voltage and powers to south bridge, then raw according to standby voltage and system voltage
It powers at south bridge voltage to south bridge.
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| CN201920241471.XU CN209657254U (en) | 2019-02-26 | 2019-02-26 | A kind of south bridge voltage module and computer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290774A (en) * | 2020-10-30 | 2021-01-29 | 深圳市创维群欣安防科技股份有限公司 | Standby control circuit based on single chip microcomputer and electric equipment |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290774A (en) * | 2020-10-30 | 2021-01-29 | 深圳市创维群欣安防科技股份有限公司 | Standby control circuit based on single chip microcomputer and electric equipment |
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