CN202421996U - Power supply control circuit - Google Patents
Power supply control circuit Download PDFInfo
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- CN202421996U CN202421996U CN2011205563781U CN201120556378U CN202421996U CN 202421996 U CN202421996 U CN 202421996U CN 2011205563781 U CN2011205563781 U CN 2011205563781U CN 201120556378 U CN201120556378 U CN 201120556378U CN 202421996 U CN202421996 U CN 202421996U
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Abstract
A power supply control circuit belongs to the field of an integrated circuit. The power supply control circuit comprises a switch signal processing circuit, an embedded controller, a system voltage power supply circuit, and a RTC (real time communication) power supply circuit; the switch signal processing circuit is connected with the embedded controller; the system voltage power supply circuit is connected with both the switch signal processing circuit and the embedded controller; the RTC power supply circuit is connected with the system voltage power supply circuit. The system voltage power supply circuit in the circuit adopts an adaptor directly to input the voltage signal so as to supply power to the circuit; and the power supply control circuit system can generate a third voltage signal to supply power to the RTC power supply circuit without the control of a start-up pushbutton. The RTC power supply circuit does not need to adopt a standby battery, so that the size of the RTC power supply circuit is reduced. Furthermore, the switch signal processing circuit of the power supply control circuit directly generates an enabling signal to control the system voltage power supply circuit, thus effectively reducing the area of the switch signal processing circuit.
Description
Technical field
The utility model belongs to integrated circuit fields, relates in particular to a kind of power-supplying circuit.
Background technology
MID (Mobile Internet Device, mobile internet device) and Tablet PC (Tablet Personal Computer, panel computer) be small and exquisite with it, be convenient for carrying, have the favor that good movability receives users.The MID of compact volume and convenience need make PCB ((Printed Circuit Board), Chinese is a printed circuit board) plate area further dwindle.
In existing design, in order to give the main battery power saving, the device for power switching and the peripheral components thereof of current supply circuit are realized the start energising, closed tester in power-down state between Notebook Battery and system purpose is cut off in use.
As shown in Figure 1, the high-level schematic functional block diagram for existing power-supplying circuit comprises: switching logic power-supplying circuit 11, system voltage feed circuit 12, RTC (Real-Time Clock, real-time timepiece chip) feed circuit 13.Said system voltage feed circuit 12 are connected between said switching logic power-supplying circuit 11 and the RTC feed circuit 13.
As shown in Figure 2, be the switching logic power-supplying circuit high-level schematic functional block diagram of existing design, this circuit comprises: switching signal processing module 21, load switch module 22, embedded controller 23, start holding signal processing module 24; Said load switch module 22 is connected with start holding signal processing module 24 with switching signal processing module 21 respectively, and said embedded controller 23 is connected with start holding signal processing module 24 with switching signal processing module 21 respectively.
As shown in Figure 3, said switching signal processing module 21 specifically comprises: start button SW1, second resistance R 2, the 4th capacitor C 4, the 4th NMOS pipe Q4, the 3rd resistance R 3, the 6th resistance R 6, the second diode D2, the 3rd capacitor C 3, the 2nd NMOS pipe Q2, the 4th resistance R 4, the 4th diode D4; Said second resistance R 2 and 4 series connection of said the 4th capacitor C, said second resistance R, 2 other end connection adaptor input voltage signal VIN, said the 4th capacitor C 4 other end ground connection; Have first node a between said second resistance R 2 and said the 4th capacitor C 4, said start button SW1 is connected between said first node a and the ground; Said the 3rd resistance R 3 one end connection adaptor input voltage signal VIN, the other end connect the drain electrode of the 4th NMOS pipe Q4; The grid of said the 4th NMOS pipe Q4 connects first node a, and source electrode connects ground; Have Section Point b between said the 3rd resistance R 3 and said the 4th NMOS pipe Q4, said the 6th resistance R 6 one ends connect Section Point b, and the other end connects the negative electrode of the second diode D2; The said second diode D2 anode connects Section Point b, and the other end all is connected with the grid that the 3rd capacitor C 3, the 2nd NMOS manage Q2; Said the 3rd capacitor C 3 other ends connect ground; Said the 4th resistance R 4 one end connection adaptor input voltage signal VIN, the other end connect the drain electrode of the 2nd NMOS pipe Q2; The source electrode of said the 2nd NMOS pipe Q2 connects ground; Have the 3rd node c between the drain electrode of said the 4th resistance R 4 and the 2nd NMOS pipe Q2, said the 4th diode D4 negative electrode connects the 3rd node c, and anode is as start holding signal EC_ONOFF output terminal; Said start holding signal EC_ONOFF output terminal connects embedded controller.
As shown in Figure 3, said load switch module 22 specifically comprises: the 5th resistance R the 5, the 23 capacitor C the 23, the 24 capacitor C 24, first capacitor C 1, first resistance R 1, the 5th resistance R 5, the 9th PMOS pipe Q9, PMOS pipe Q1, the 22 capacitor C 22, second capacitor C 2.
The equal ground connection of said the 23 capacitor C the 23, the 24 capacitor C 24 1 ends, other end connection adaptor input voltage signal VIN; The source electrode of said first capacitor C 1, first resistance R, 1 one ends equal connection adaptor input voltage signal VIN and PMOS pipe Q1; The other end connects an end of said the 5th resistance R 5 and the grid of PMOS pipe Q1; The other end of said the 5th resistance R 5 connects the 3rd node c in the said switching signal processing module 11 through the anode of the first diode D1; The source electrode connection adaptor input voltage signal VIN of said PMOS pipe Q1, drain electrode is as input voltage resultant signal VINP output terminal; The grid of said the 9th PMOS pipe Q9, source electrode, all corresponding grid, source electrode, the drain electrode with said PMOS pipe Q1 of drain electrode link to each other; One end of said the 22 capacitor C 22 and second capacitor C 2 all is connected input voltage resultant signal VINP output terminal, the equal ground connection of the other end.
As shown in Figure 3, start holding signal processing module 24 comprises that the 7th resistance R 7, the 8th resistance R 8, the 3rd NMOS manage Q3.
Said the 7th resistance R 7 one ends conduct+5V_+3.3V_ON signal input part, the other end connect the grid of the 3rd NMOS pipe Q3; Said the 8th resistance R 8 one ends connect the grid of the 3rd NMOS pipe Q3, and the other end connects ground; The source electrode of said the 3rd NMOS pipe Q3 connects ground, and drain electrode connects the 3rd node c in the said switching signal processing module through the anode D1 of first diode.
Said embedded controller one end connects the start holding signal EC_ONOFF output terminal of said switching signal processing module, the other end connect said start holding signal processing module+the 5V_+3.3V_ON signal input part.
As shown in Figure 4, said system voltage feed circuit comprise: the power supply chip U1 of system, the 30 resistance R the 30, the 31 resistance R the 31, the 23 resistance R 23.
Said the 30 resistance R 30 and 31 series connection of the 31 resistance R, said the 30 resistance R 30 other ends connect the input voltage resultant signal VINP output terminal of said switching logic power-supplying circuit; Said the 31 resistance R 31 other end ground connection.Between said the 30 resistance R 30 and the 31 resistance R 31 the 4th node d is arranged, the enable signal pin LDO5_EN of the said power supply chip U1 of system connects said the 4th node d; Said power pin VINP connects said input voltage resultant signal VINP output terminal.
Said the 23 resistance R 23 1 ends connect the two-way width modulation enable signal PM_EN_3.3V_5V pin of the said power supply chip U1 of system; The other end is as two-way width modulation enable signal input end LDO5; After said System on Chip/SoC U1 receives input voltage resultant signal VINP, output two-way width modulation enable signal, said two-way width modulation enable signal input two-way width modulation enable signal input end LDO5; The said power supply chip U1 of system has 5V voltage output end, 3.3V voltage output end, 3.3V_ALW2 voltage output end; Said 3.3V_ALW2 voltage output end connects said system voltage feed circuit.
As shown in Figure 5, the RTC feed circuit specifically comprise: reserve battery 51, the 9th resistance R 9, the 7th diode D7, the 6th diode D6, the 3rd capacitor C 3.
Said the 9th resistance one end connects reserve battery 51, and the negative electrode that the other end connects the anode of said the 7th diode D7, said the 7th diode D7 is as the RTC output terminal+3.3V_RTC that supplies power.
Said the 6th diode D6 one end is as 3.3V_ALW2 voltage input end+3.3V, and the other end connects the 7th diode D7 negative electrode; Said the 3rd capacitor C 3 one ends connect the 7th diode D7 negative electrode, and the other end connects ground; Said 3.3V _ ALW2 voltage input end+3.3V connects the said power supply chip U1's of system+the 3.3V_ALW2 output terminal.
In conjunction with Fig. 3,4,5; The principle of work of existing power-supplying circuit is described: after the user presses start button SW1; The 4th NMOS pipe Q4 ends; Adapter input voltage signal VIN through the 3rd resistance R 3 and the second diode D2 to 3 chargings of the 3rd capacitor C, when the 3rd capacitor C 3 is charged to 1.8V when above, the 2nd NMOS pipe Q2 conducting; After the 2nd NMOS pipe Q2 conducting; The very fast conducting of the first diode D1; Again via first resistance R 1 and the 5th resistance R 5 dividing potential drops; Make between the grid source electrode of PMOS pipe Q1 and the 9th PMOS pipe Q9 and produce voltage difference and conducting, after PMOS pipe Q1 and the 9th PMOS pipe Q9 conducting, battery input voltage signal VIN just supplies power to input voltage resultant signal VINP.
In Fig. 4; After input voltage resultant signal VINP passes through the 30 resistance R 30 and the 31 resistance R 31 dividing potential drops; The enable signal pin LDO5_EN that exports to system voltage power supply chip U1 is as enable signal; After enable signal pin LDO5_EN receives enable signal, output two-way width modulation enable signal.Two-way width modulation enable signal makes enable signal for the two-way width modulation enable signal PM_EN_3.3V_5V pin of system voltage power supply chip U1 through the 23 resistance R 23, and system voltage power supply chip U1 will modulate output system 5V supply voltage and the 3.3V of system supply voltage.When input voltage resultant signal VINP gave system voltage power supply chip U1 power supply always, system voltage power supply chip U1 continued output+3.3V_ALW2 signal.
In the first diode D1 conducting in Fig. 3; The 4th also conducting of diode D4; To hang down effective start holding signal EC_ONOFF and give embedded controller (EC, Embedded Controller), embedded controller sends+the 5V_+3.3V_ON signal after receiving start holding signal EC_ONOFF at once; Make the 3rd NMOS pipe Q3 conducting through the 7th resistance R 7, be in conducting state to guarantee PMOS pipe Q1 and the 9th PMOS pipe Q9.
Hence one can see that, and when notebook was in off-mode, PMOS pipe Q1 and the 9th PMOS pipe Q9 ended, and notebook will keep clock information, just reserve battery need be arranged.Therefore also need design the reserve battery feed circuit, see Fig. 5.When notebook is in off-mode, supply power to clock through the 9th resistance R 9 and the 7th diode D7 by reserve battery 51.When notebook is in open state, then can supply power to clock by+3.3V_ALW2 signal through the 6th diode D6.If reserve battery is the rechargeable type battery, can the 7th diode D7 short circuit be charged to the rechargeable type reserve battery by system+3.3V_ALW2 signal.
Switching logic power-supplying circuit and RTC feed circuit have not only taken a large amount of pcb board areas, the Material Cost of the considerable part that also accounted in the prior art.How guaranteeing to accomplish under original design performance situation small and exquisite, selecting little packaging for use is a kind of method.But the circuit area of selecting for use little packaging to reduce is limited, how effectively to reduce the pcb board area, is the technical matters that needs to be resolved hurrily.
The utility model content
The utility model provides a kind of area less power-supplying circuit for solving the existing excessive technical matters of notebook power-supplying circuit area.
A kind of power-supplying circuit comprises: switching signal is handled to obtain the switching signal treatment circuit of starting-up signal and start holding signal;
Split organizational security and hold the embedded controller that signal is handled;
The system voltage feed circuit that enable to export first voltage signal, second voltage signal, tertiary voltage signal according to starting-up signal and start holding signal;
Said tertiary voltage signal is offered the RTC feed circuit of RTC circuit;
Said switching signal treatment circuit connects said embedded controller; Said system voltage feed circuit are connected with embedded controller with said switching signal treatment circuit respectively; Said RTC feed circuit connected system voltage feed circuit.
Further, said switching signal treatment circuit comprises: start button, second resistance, the 4th electric capacity, the 4th NMOS pipe, the 3rd resistance, the 6th resistance, second diode, the 3rd electric capacity, the 2nd NMOS pipe, the 4th resistance, the 4th diode;
Said second resistance and said the 4th capacitances in series, the said second resistance other end connection adaptor input voltage signal, said the 4th electric capacity other end ground connection;
Have first node between said second resistance and said the 4th electric capacity, said start button is connected between said first node and the ground;
Said the 3rd resistance one end connects the orchestration input voltage signal, and the other end connects the drain electrode of the 4th NMOS pipe;
The grid of said the 4th NMOS pipe connects first node, and source electrode connects ground;
Have Section Point between said the 3rd resistance and said the 4th NMOS pipe, said the 6th resistance one end connects Section Point, and the other end is as the starting-up signal output terminal;
Said second diode anode connects Section Point, and the other end all is connected with the grid of starting-up signal output terminal, the 3rd electric capacity, the 2nd NMOS pipe; Said the 3rd electric capacity other end connects ground;
Said the 4th resistance one end connects the orchestration input voltage signal, and the other end connects the drain electrode of the 2nd NMOS pipe; The source electrode of said the 2nd NMOS pipe connects ground;
Have the 3rd node between the drain electrode of said the 4th resistance and the 2nd NMOS pipe, said the 4th diode cathode connects the 3rd node, and anode is as start holding signal output terminal;
Said starting-up signal output terminal connected system voltage feed circuit; Start holding signal output terminal connects embedded controller.
Further, said system voltage feed circuit comprise: system's power supply chip, the 12 diode, the 13 diode, the 23 resistance;
The negative electrode of said the 12 diode and the 13 diode all is connected the enable signal pin of said system power supply chip; The anode of said the 12 diode is as start holding signal input end; The anode of said the 13 diode is as the starting-up signal input end;
Said the 23 resistance one end connects the two-way width modulation enable signal pin of said system power supply chip; The other end is as two-way width modulation enable signal input end;
Said starting-up signal input end connects the starting-up signal output terminal of said switching signal treatment circuit; Said start holding signal input end connects said embedded controller; Said power pin connects said orchestration input voltage signal;
After said System on Chip/SoC receives starting-up signal, output two-way width modulation enable signal, said two-way width modulation enable signal input two-way width modulation enable signal input end;
The said power supply chip U1 of system also has first voltage signal output end, second voltage signal output end and tertiary voltage signal output part;
Said tertiary voltage signal output part connects said RTC feed circuit.
Further, said RTC feed circuit comprise: the 9th resistance, the 6th electric capacity;
Said the 9th resistance one end connects said tertiary voltage signal output part, and the other end is as the RTC output terminal of supplying power;
Said the 6th electric capacity one end connects RTC power supply output terminal, other end ground connection.
Further, said second diode, the 4th diode, the 12 diode and the 13 diode are schottky diode.
Further, the said power supply chip U1 of system is ISL6236.
Further, said first voltage signal is the 5V voltage signal, and said second voltage signal is the 3.3V voltage signal, and said tertiary voltage signal is for continuing output 3.3V voltage signal.
The utility model provides a kind of power-supplying circuit; System voltage feed circuit in this power-supplying circuit directly adopt the adapter input voltage signal that it is supplied power, and the power-supplying circuit system can produce the tertiary voltage signal and supply power for the RTC feed circuit under the control of the button of not started shooting.Make the RTC feed circuit need not adopt reserve battery, reduced the size of RTC feed circuit.The switching signal treatment circuit of the utility model directly produces enable signal the system voltage feed circuit is controlled in addition, has effectively reduced the area of switching signal treatment circuit.
Description of drawings
Fig. 1 is the high-level schematic functional block diagram of the power-supplying circuit that provides of prior art.
Fig. 2 is the high-level schematic functional block diagram of the switching logic power-supplying circuit that provides of prior art.
Fig. 3 is the circuit diagram of the switching logic power-supplying circuit that provides of prior art.
Fig. 4 is the synoptic diagram of the system voltage feed circuit that provide of prior art.
Fig. 5 is the synoptic diagram of the RTC feed circuit that provide of prior art.
Fig. 6 is the synoptic diagram of the power-supplying circuit that provides of the utility model embodiment.
Fig. 7 is the circuit diagram of the switching signal treatment circuit that provides of the utility model embodiment.
Fig. 8 is the synoptic diagram of the system voltage feed circuit that provide of the utility model embodiment.
Fig. 9 is the synoptic diagram of the RTC feed circuit that provide of the utility model embodiment.
Embodiment
Clearer for technical matters, technical scheme and beneficial effect that the utility model is solved, below in conjunction with accompanying drawing and embodiment, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The design of this practical circuit is guaranteeing to have reduced a large amount of circuit devcies on original design performance and the design logic, thereby saves more pcb board areas, has optimized circuit layout, thereby has reached the purpose that reduces cost, makes product compact.
Of Fig. 6, be the power-supplying circuit synoptic diagram that the utility model embodiment provides, this power-supplying circuit comprises: switching signal treatment circuit 61, embedded controller 62, system voltage feed circuit 63, RTC feed circuit 64;
Switching signal treatment circuit 61 handles switching signal to obtain starting-up signal and start holding signal; Embedded controller 62 is split organizational security and is held signal and handle; System voltage feed circuit 63 enable to export first voltage signal, second voltage signal, tertiary voltage signal according to starting-up signal and start holding signal; RTC feed circuit 64 offer RTC feed circuit 64 with said tertiary voltage signal.
Said first voltage signal is the 5V voltage signal, and said second voltage signal is the 3.3V voltage signal, and said tertiary voltage signal is for continuing output 3.3V voltage signal.5V voltage signal and 3.3V voltage signal are supplied power to system, and said lasting output 3.3V voltage signal is given the RTC circuit supply.
Said switching signal treatment circuit 61 connects said embedded controller 62; Said system voltage feed circuit 63 are connected with embedded controller 62 with said switching signal treatment circuit 61 respectively; Said RTC feed circuit 64 connected system voltage feed circuits 63.
As embodiments of the invention, the circuit diagram of switching signal treatment circuit, system voltage feed circuit, RTC feed circuit is respectively like Fig. 7, Fig. 8, shown in Figure 9.Combine Fig. 7, Fig. 8, Fig. 9 to describe the particular circuit configurations of power-supplying circuit at present.
As shown in Figure 7, said switching signal treatment circuit comprises: start button SW1, second resistance R 2, the 4th capacitor C 4, the 4th NMOS pipe Q4, the 3rd resistance R 3, the 6th resistance R 6, the second diode D2, the 3rd capacitor C 3, the 2nd NMOS pipe Q2, the 4th resistance R 4, the 4th diode D4;
Said second resistance R 2 and 4 series connection of said the 4th capacitor C, said second resistance R, 2 other end connection adaptor input voltage signal VIN, said the 4th capacitor C 4 other end ground connection;
Have first node a between said second resistance R 2 and said the 4th capacitor C 4, said start button is connected between said first node a and the ground;
Said the 3rd resistance R 3 one end connection adaptor input voltage signal VIN, the other end connect the drain electrode of the 4th NMOS pipe Q4;
The grid of said the 4th NMOS pipe Q4 connects first node a, and source electrode connects ground;
Have Section Point b between said the 3rd resistance R 3 and said the 4th NMOS pipe Q4, said the 6th resistance R 6 one ends connect Section Point b, and the other end is as starting-up signal PWRSWITCH output terminal;
The said second diode D2 anode connects Section Point b, and the grid that the other end and starting-up signal PWRSWITCH output terminal, the 3rd capacitor C 3, the 2nd NMOS manage Q2 all is connected; Said the 3rd capacitor C 3 other ends connect ground;
Said the 4th resistance R 4 one end connection adaptor input voltage signal VIN, the other end connect the drain electrode of the 2nd NMOS pipe Q2; The source electrode of said the 2nd NMOS pipe Q2 connects ground;
Have the 3rd node c between the drain electrode of said the 4th resistance R 4 and the 2nd NMOS pipe Q2, said the 4th diode D4 negative electrode connects the 3rd node c, and anode is as start holding signal EC_ONOFF output terminal;
Said starting-up signal PWRSWITCH output terminal connected system voltage feed circuit; Start holding signal EC_ONOFF output terminal connects embedded controller.
As shown in Figure 8, said system voltage feed circuit comprise: the power supply chip U1 of system, the 12 diode D12, the 13 diode D13, the 23 resistance R 23;
The negative electrode of said the 12 diode D12 and the 13 diode D13 all is connected the enable signal pin LDO5_EN of the said power supply chip U1 of system; The anode of said the 12 diode D12 is as start holding signal+5V_+3.3V_ON input end; The anode of said the 13 diode D13 is as starting-up signal PWRSWITCH input end;
Said the 23 resistance R 23 1 ends connect the two-way width modulation enable signal PM_EN_3.3V_5V pin of the said power supply chip U1 of system; The other end is as two-way width modulation enable signal input end LDO5;
Said starting-up signal input end connects the starting-up signal PWRSWITCH output terminal of said switching signal treatment circuit; Said start holding signal+5V_+3.3V_ON input end connects said embedded controller; Said power pin VINP connects said adapter input voltage signal VIN;
After said System on Chip/SoC U1 receives starting-up signal PWRSWITCH, output two-way width modulation enable signal LDO5 ', said two-way width modulation enable signal LDO5 ' input enable signal LDO5 input end;
The said power supply chip U1 of system also has first voltage signal output end, second voltage signal output end and tertiary voltage signal output part;
Said tertiary voltage signal output part connects said RTC feed circuit.
As shown in Figure 9, said RTC feed circuit comprise: the 9th resistance R 9, the 6th capacitor C 6;
Said the 9th resistance R 9 one ends connect said tertiary voltage signal output part, and the other end is as the RTC output terminal+3.3V_RTC that supplies power;
Said the 6th capacitor C 6 one ends connect RTC power supply output terminal+3.3V_ALW2, other end ground connection.
Because schottky diode has advantages such as the high and forward voltage drop of switching frequency is low, the second diode D2, the 4th diode D4, the 12 diode D12 and the 13 diode D13 are schottky diode in the present embodiment.
Because the ISL6236 that Intersil company produces has high precision, high-level efficiency, low speed paper tape reader static power disspation, advantage such as input range is wide.The said power supply chip U1 of system selects the ISL6236 integrated chip.
For the more convenient power-supplying circuit of understanding embodiment, the circuit working principle is described below in conjunction with Fig. 7,8,9.
Like Fig. 7; After the user pressed start button SW1, the 4th NMOS pipe Q4 ended, and adapter input voltage signal VIN charges to the 3rd capacitor C 3 through the 3rd resistance R 3 and the second diode D2; When the 3rd capacitor C 3 is charged to 1.8V when above; Starting-up signal PWRSWITCH after enable signal pin LDO5_EN receives enable signal, exports two-way width modulation enable signal LDO5 ' through the enable signal pin LDO5_EN that the 13 diode D13 among Fig. 8 gives the power supply chip U1 of system.Two-way width modulation enable signal LDO5 ' makes enable signal for the two-way width modulation enable signal PM_EN_3.3V_5V pin of system voltage power supply chip U1 through the 23 resistance R 23, and system voltage power supply chip U1 will modulate output 5V voltage signal and 3.3V voltage signal.
Simultaneously, starting-up signal PWRSWITCH will make the 2nd NMOS pipe Q2 conducting, will hang down effective start holding signal EC_ONOFF and send to embedded controller through the 4th diode D4.Embedded controller sends the enable signal pin LDO5_EN that start holding signal+5V_+3.3V_ON gives the power supply chip U1 of system after receiving starting-up signal again; To keep normal two-way system supply voltage, i.e. 5V voltage signal and the 3.3V voltage signal exported that continue of the power supply chip U1 of system.
Because the power pin VINP of the power supply chip U1 of system directly connects said adapter input voltage signal VIN; The power supply chip U1 of system can directly export one+3.3V_ALW2 voltage signal and use to clock through the 9th resistance R 9 among Fig. 9, this+the do not started shooting control of button SW1 of the generation of 3.3V_ALW2 voltage signal.In Fig. 8; Used starting-up signal PWRSWITCH to go the two-way width modulation of control system power supply chip U1 whether to export; Need not break off adapter input voltage signal VIN and power pin VINP fully by load switch, can realize that equally the electric leakage of notebook shutdown back battery is very little.In Fig. 8, to the clock power supply, reserve battery can remove one+3.3V_ALW2 of the power supply chip U1 of system output voltage signal equally like this, and clock information is lost through the 9th resistance R 9 among Fig. 9.Thereby the simplification circuit reaches and reduces the material consumption, takies plate area still less, saves the purpose of Material Cost.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (7)
1. a power-supplying circuit is characterized in that, this power-supplying circuit comprises: switching signal is handled to obtain the switching signal treatment circuit of starting-up signal and start holding signal;
Split organizational security and hold the embedded controller that signal is handled;
The system voltage feed circuit that enable to export first voltage signal, second voltage signal, tertiary voltage signal according to starting-up signal and start holding signal;
Said tertiary voltage signal is offered the RTC feed circuit of RTC circuit;
Said switching signal treatment circuit connects said embedded controller; Said system voltage feed circuit are connected with embedded controller with said switching signal treatment circuit respectively; Said RTC feed circuit connected system voltage feed circuit.
2. power-supplying circuit as claimed in claim 1 is characterized in that; Said switching signal treatment circuit comprises: start button, second resistance, the 4th electric capacity, the 4th NMOS pipe, the 3rd resistance, the 6th resistance, second diode, the 3rd electric capacity, the 2nd NMOS pipe, the 4th resistance, the 4th diode;
Said second resistance and said the 4th capacitances in series, the said second resistance other end connection adaptor input voltage signal, said the 4th electric capacity other end ground connection;
Have first node between said second resistance and said the 4th electric capacity, said start button is connected between said first node and the ground;
Said the 3rd resistance one end connection adaptor input voltage signal, the other end connect the drain electrode of the 4th NMOS pipe;
The grid of said the 4th NMOS pipe connects first node, and source electrode connects ground;
Have Section Point between said the 3rd resistance and said the 4th NMOS pipe, said the 6th resistance one end connects Section Point, and the other end is as the starting-up signal output terminal;
Said second diode anode connects Section Point, and the other end all is connected with the grid of starting-up signal output terminal, the 3rd electric capacity, the 2nd NMOS pipe; Said the 3rd electric capacity other end connects ground;
Said the 4th resistance one end connection adaptor input voltage signal, the other end connect the drain electrode of the 2nd NMOS pipe; The source electrode of said the 2nd NMOS pipe connects ground;
Have the 3rd node between the drain electrode of said the 4th resistance and the 2nd NMOS pipe, said the 4th diode cathode connects the 3rd node, and anode is as start holding signal output terminal;
Said starting-up signal output terminal connected system voltage feed circuit; Start holding signal output terminal connects embedded controller.
3. power-supplying circuit as claimed in claim 2 is characterized in that, said system voltage feed circuit comprise: system's power supply chip, the 12 diode, the 13 diode, the 23 resistance;
The negative electrode of said the 12 diode and the 13 diode all is connected the enable signal pin of said system power supply chip; The anode of said the 12 diode is as start holding signal input end; The anode of said the 13 diode is as the starting-up signal input end;
Said the 23 resistance one end connects the two-way width modulation enable signal pin of said system power supply chip; The other end is as two-way width modulation enable signal input end;
Said starting-up signal input end connects the starting-up signal output terminal of said switching signal treatment circuit; Said start holding signal input end connects said embedded controller; Said power pin connects said adapter input voltage signal;
After said System on Chip/SoC receives starting-up signal, output two-way width modulation enable signal, said two-way width modulation enable signal input two-way width modulation enable signal input end;
The said power supply chip U1 of system also has first voltage signal output end, second voltage signal output end and tertiary voltage signal output part;
Said tertiary voltage signal output part connects said RTC feed circuit.
4. power-supplying circuit as claimed in claim 3 is characterized in that, said RTC feed circuit comprise: the 9th resistance, the 6th electric capacity;
Said the 9th resistance one end connects said tertiary voltage signal output part, and the other end is as the RTC output terminal of supplying power;
Said the 6th electric capacity one end connects RTC power supply output terminal, other end ground connection.
5. power-supplying circuit as claimed in claim 3 is characterized in that, said second diode, the 4th diode, the 12 diode and the 13 diode are schottky diode.
6. power-supplying circuit as claimed in claim 3 is characterized in that, the said power supply chip U1 of system is ISL6236.
7. like any described power-supplying circuit of claim 1-6, it is characterized in that said first voltage signal is the 5V voltage signal, said second voltage signal is the 3.3V voltage signal, and said tertiary voltage signal is for continuing output 3.3V voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205563781U CN202421996U (en) | 2011-12-28 | 2011-12-28 | Power supply control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205563781U CN202421996U (en) | 2011-12-28 | 2011-12-28 | Power supply control circuit |
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| CN202421996U true CN202421996U (en) | 2012-09-05 |
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| CN2011205563781U Expired - Fee Related CN202421996U (en) | 2011-12-28 | 2011-12-28 | Power supply control circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917156A (en) * | 2015-04-24 | 2015-09-16 | 北京小鸟看看科技有限公司 | Head-mounted display, protective circuit of electronic equipment and circuit protection method |
| CN106200763A (en) * | 2014-08-28 | 2016-12-07 | 联发科技股份有限公司 | Real-time clock system and method based on pulse width modulation |
| CN106655465A (en) * | 2016-11-07 | 2017-05-10 | 珠海格力电器股份有限公司 | System clock power supply device and method and electric appliance |
| CN108054912A (en) * | 2017-12-28 | 2018-05-18 | 深圳市华星光电半导体显示技术有限公司 | PMIC start sequence circuits and PMIC start time sequence determination methods |
-
2011
- 2011-12-28 CN CN2011205563781U patent/CN202421996U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106200763A (en) * | 2014-08-28 | 2016-12-07 | 联发科技股份有限公司 | Real-time clock system and method based on pulse width modulation |
| CN104917156A (en) * | 2015-04-24 | 2015-09-16 | 北京小鸟看看科技有限公司 | Head-mounted display, protective circuit of electronic equipment and circuit protection method |
| CN106655465A (en) * | 2016-11-07 | 2017-05-10 | 珠海格力电器股份有限公司 | System clock power supply device and method and electric appliance |
| CN106655465B (en) * | 2016-11-07 | 2023-09-29 | 珠海格力电器股份有限公司 | System clock power supply device, method and electric appliance |
| CN108054912A (en) * | 2017-12-28 | 2018-05-18 | 深圳市华星光电半导体显示技术有限公司 | PMIC start sequence circuits and PMIC start time sequence determination methods |
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