CN203859545U - Single chip intelligent power supply with load state detection and multiple independent current limit output - Google Patents
Single chip intelligent power supply with load state detection and multiple independent current limit output Download PDFInfo
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- CN203859545U CN203859545U CN201420126661.4U CN201420126661U CN203859545U CN 203859545 U CN203859545 U CN 203859545U CN 201420126661 U CN201420126661 U CN 201420126661U CN 203859545 U CN203859545 U CN 203859545U
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Abstract
The utility model discloses a single chip intelligent power supply with load state detection and multiple independent current limit output, and problems of large size, high cost and poor security of existing mobile power supply are solved. The intelligent power supply comprises a USB input interface and also comprises a MOS tube T1, a MOS tube T2, a MOS tube T3 and a control chip IC which are connected orderly and then are connected with the USB input interface. The control chip IC comprises a central controller MCU and at least one load state detection and limit current output unit which is connected to the central controller MCU. One end of the load state detection and current limit output unit is connected between the MOS tube T1 and the MOS tube T2, and the other end is connected with an external load. According to the single chip intelligent power supply, the load state detection and current limit output unit is arranged in the control chip IC, the states of insertion, pulling, short circuit, overcurrent and the like of each load can be independently detected, the fully independence of multiple outputs is realized, the cost is low, the security is high, the scalability is strong, and the single chip intelligent power supply is very suitable for large-scale promotion and use.
Description
Technical field
The utility model relates to the single-chip intelligent power of the multichannel independence current limliting output of bringing onto load state-detection, belongs to portable power source, intelligent charge field.
Background technology
Power supply provides electric energy for many electronic devices, in today of electronic technology high speed development, power supply is also accompanied by the improvement of various electronic products and updates, along with the sustainable development of smart mobile phone, flat board and other mobile digital products, portable power source also develops into a complete market gradually, and following portable power source also will continue to light, thin, little future development.
In existing binary channel intelligent charge scheme, power supply needs two independently charge controlling chip and supporting outer members, such as inductance, electric capacity and field effect transistor MOSFET, causes that system cost is high and pcb board area is larger; On the other hand, if load output is shorted to ground, battery can form Short-Circuit High Current passage to ground by the diode of outside metal-oxide-semiconductor, can cause battery over-discharge blast when serious, forms potential safety hazard.
Utility model content
The purpose of this utility model is to provide the single-chip intelligent power of the multichannel independence current limliting output of bringing onto load state-detection, solves that existing portable power source volume is large, cost is high and the problem of poor stability.
To achieve these goals, the technical solution adopted in the utility model is as follows:
The single-chip intelligent power of the multichannel independence current limliting output of bringing onto load state-detection, comprise USB input interface, the metal-oxide-semiconductor T1 being connected with USB input interface after connecting in turn, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, simultaneously with metal-oxide-semiconductor T1, the control chip IC that metal-oxide-semiconductor T2 is connected with metal-oxide-semiconductor T3, after connecting in turn, be connected in inductance L 1 between metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, resistance R a and battery, described control chip IC comprises central controller MCU, the load condition that at least one is connected with central controller MCU detects and current limliting output unit, described load condition detects and current limliting output unit one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, one end is connected with external loading.
Particularly, described load condition detect with current limliting output unit with load with corresponding one by one, described load condition detection and current limliting output unit comprise the parallel connection load condition detecting unit G that one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2 afterwards, the other end and load are connected
n, current limiting switch S
n, wherein N is natural number, load condition detecting unit G
ndetection information output to central controller MCU.
Further, described load condition detecting unit G
ncomprise DC reference voltage source, inductor and operational amplifier, one end, described DC reference voltage source is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with operational amplifier one input; Inductor one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with another input of operational amplifier, load respectively, and the output of described operational amplifier is connected with central controller MCU.Load condition detects the load condition that can detect with current limliting output unit and comprises the states such as load is inserted, extracted, short circuit, overcurrent, current limliting, and coordinates the output of central controller MCU control power supply.
Further, described current limiting switch S
nfor High-side switch, this switch one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with load, and when after load short circuits or overcurrent, this switch can effectively be blocked the path between battery and load, realizes high safety reliability.
The single-chip intelligent power of the multichannel independence current limliting output of bringing onto load state-detection, comprise USB input interface, the metal-oxide-semiconductor T1 being connected with USB input interface after connecting in turn, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, after connecting in turn, be connected in inductance L 1 between metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, resistance R a and battery, described metal-oxide-semiconductor T1, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3 are built in control chip IC, described control chip IC also comprises central controller MCU, the load condition that at least one is connected with central controller MCU detects and current limliting output unit, described load condition detects and current limliting output unit one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, one end is connected with load, described metal-oxide-semiconductor T1, metal-oxide-semiconductor T2 is connected with central controller MCU with metal-oxide-semiconductor T3 simultaneously.
Particularly, described load condition detects corresponding one by one with current limliting output unit and load, and described load condition detects consistent with the quantity of current limliting output unit and the quantity of load, and load condition detects the output with a load of current limliting output unit control, described load condition detect with current limliting output unit comprise that rear one end in parallel is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, load condition detecting unit G that the other end and load are connected
n, current limiting switch S
n, wherein N is natural number, load condition detecting unit G
ndetection information output to central controller MCU.
Further, described load condition detecting unit G
ncomprise DC reference voltage source, inductor and operational amplifier, one end, described DC reference voltage source is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with operational amplifier one input; Inductor one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with another input of operational amplifier, load respectively, and the output of described operational amplifier is connected with central controller MCU.
Again further, described current limiting switch S
nfor High-side switch, this switch one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with load.
The utility model compared with prior art, has the following advantages and beneficial effect:
(1) the utility model arranges the load condition detection and current limliting output unit that central controller MCU is connected with central controller MCU with at least one in control chip IC, a load condition detects and load of current limliting output unit control, can detect independently the insertion/extract/states such as short circuit/overcurrent of each load, realize the complete independence of multichannel output;
(2) the utility model detects load condition with current limliting output unit and is integrated in the middle of control chip IC, realizes a chip controls multichannel, has reduced development cost, and has reduced pcb board area;
(3) the utility model detects with current limliting output unit and can be short-circuited when abnormal and close in time in load at the load condition that connects between battery and load, and can carry out in real time current limliting output, prevent that large electric current from, to load shock, having realized the protection of security of system;
(4) the utility model can arrange N load condition detection and current limliting output unit (N >=1) in control chip IC, and extensibility is strong, is applicable to very much large-scale promotion and uses.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is the circuit theory diagrams of the utility model-embodiment 1.
Fig. 3 is the circuit theory diagrams of the utility model-embodiment 2.
Fig. 4 is the circuit theory diagrams of the utility model-embodiment 3.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and execution mode of the present utility model includes but not limited to the following example.
Embodiment 1
As depicted in figs. 1 and 2, the single-chip intelligent power of the multichannel independence current limliting output of bringing onto load state-detection, comprise USB input interface, the metal-oxide-semiconductor T1 being connected with USB input interface after connecting in turn, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, simultaneously with metal-oxide-semiconductor T1, the control chip IC that metal-oxide-semiconductor T2 is connected with metal-oxide-semiconductor T3, after connecting in turn, be connected in inductance L 1 between metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, resistance R a and battery, described control chip IC comprises central controller MCU, two load conditions that are connected with central controller MCU detect and current limliting output unit, described load condition detects and current limliting output unit one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, one end is connected with external loading.In the present embodiment, the drain electrode of metal-oxide-semiconductor T1 is connected with the positive pole of USB input interface, and grid is connected with control chip IC, and source electrode detects and is connected with current limliting output unit with load condition, the minus earth of USB input interface; The grid of metal-oxide-semiconductor T2 is connected with control chip IC, and source electrode detects and is connected with current limliting output unit with load condition, and drain electrode is connected with the drain electrode of metal-oxide-semiconductor T3; The grid of metal-oxide-semiconductor T3 is connected with control chip IC, source ground, the other end ground connection of battery, the minus earth of load.Except the disclosed content of the utility model, the utility model control chip IC is also integrated with some optimized circuits and I/O interface thereof, the grid of metal-oxide-semiconductor T1, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3 is connected with corresponding I/O interface respectively, these optimized circuits and I/O interface thereof are the technology of existing comparative maturity, do not repeat at this.
Detected and the control of current limliting output unit by a described load condition in order to realize a load, described load condition detects corresponding one by one with current limliting output unit and load, and described load condition detects consistent with the quantity of current limliting output unit and the quantity of load, described load condition detects with current limliting output unit and comprises the parallel connection load condition detecting unit G that one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2 afterwards, the other end and load are connected
n, current limiting switch S
n, wherein N is natural number, load condition detecting unit G
ndetection information output to central controller MCU.N=1 in the first branch road, N=2 in the second branch road, by that analogy, comprises a load condition detecting unit and the load being connected with load condition detecting unit in every branch road; In this enforcement, load condition detecting unit has two, is respectively G
1and G
2, current limiting switch also has two, is respectively S
1and S
2.
In the present embodiment, described load condition detecting unit G
ncomprise that one end is connected in the DC reference voltage source between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, the operational amplifier that inverting input is connected with DC reference voltage source DC, the resistance being connected with the positive input of operational amplifier, described resistance is also connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, the output of described operational amplifier is connected with central controller MCU, normal phase input end is connected with load, realizes the independent function of controlling by the combination of above-mentioned electronic devices and components.In the present embodiment, described current limiting switch S
nadopt High-side switch, this switch one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with load, can effectively cut off like this path between battery and load, accomplishes the absolute isolation of battery and load.In the time that load accesses, control chip IC senses that the access meeting of load is by drop-down, by the voltage of DC reference voltage source DC and the voltage ratio of operational amplifier, output logic signal is to central controller MCU, thereby control opening of current limiting switch, the form of load-sensing can realize in variation, and inductor is realized by resistance in the present embodiment, also can realize by diode or current source.
The utility model can be realized USB input interface to load supplying, to battery charging and the function of battery to load supplying.
Embodiment 2
As shown in Figure 3, as different from Example 1, described metal-oxide-semiconductor T2 is also parallel with Schottky diode D1.
Embodiment 3
As shown in Figure 4, as different from Example 1, metal-oxide-semiconductor T1, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3 are integrated in control chip IC, and the grid of metal-oxide-semiconductor T1, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3 is connected with central controller MCU respectively.
According to above-described embodiment, just can realize well the utility model.What deserves to be explained is; under prerequisite based on said structure design; for solving same technical problem; even if some that make on the utility model are without substantial change or polishing; the essence of the technical scheme adopting is still the same with the utility model, therefore it also should be in protection range of the present utility model.
Claims (8)
1. the single-chip intelligent power of the multichannel independence current limliting of bringing onto load state-detection output, comprise USB input interface, the metal-oxide-semiconductor T1 being connected with USB input interface after connecting in turn, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, simultaneously with metal-oxide-semiconductor T1, the control chip IC that metal-oxide-semiconductor T2 is connected with metal-oxide-semiconductor T3, after connecting in turn, be connected in inductance L 1 between metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, resistance R a and battery, it is characterized in that, described control chip IC comprises central controller MCU, the load condition that at least one is connected with central controller MCU detects and current limliting output unit, described load condition detects and current limliting output unit one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, one end is connected with load.
2. the single-chip intelligent power of the multichannel independence current limliting of bringing onto load state-detection according to claim 1 output, it is characterized in that, described load condition detects corresponding one by one with current limliting output unit and load, and described load condition detection and current limliting output unit comprise the parallel connection load condition detecting unit G that one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2 afterwards, the other end and load are connected
n, current limiting switch S
n, wherein N is natural number, load condition detecting unit G
ndetection information output to central controller MCU.
3. the single-chip intelligent power of the multichannel independence current limliting of bringing onto load state-detection according to claim 2 output, is characterized in that described load condition detecting unit G
ncomprise DC reference voltage source, inductor and operational amplifier, one end, described DC reference voltage source is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with operational amplifier one input; Inductor one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with another input of operational amplifier, load respectively, and the output of described operational amplifier is connected with central controller MCU.
4. the single-chip intelligent power of the multichannel independence current limliting of bringing onto load state-detection according to claim 3 output, is characterized in that described current limiting switch S
nfor High-side switch, this switch one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with load.
5. the single-chip intelligent power of the multichannel independence current limliting of bringing onto load state-detection output, comprise USB input interface, the metal-oxide-semiconductor T1 being connected with USB input interface after connecting in turn, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, after connecting in turn, be connected in inductance L 1 between metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3, resistance R a and battery, it is characterized in that, described metal-oxide-semiconductor T1, metal-oxide-semiconductor T2 and metal-oxide-semiconductor T3 are built in control chip IC, described control chip IC also comprises central controller MCU, the load condition that at least one is connected with central controller MCU detects and current limliting output unit, described load condition detects and current limliting output unit one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, one end is connected with load, described metal-oxide-semiconductor T1, metal-oxide-semiconductor T2 is connected with central controller MCU with metal-oxide-semiconductor T3 simultaneously.
6. the single-chip intelligent power of the multichannel independence current limliting of bringing onto load state-detection according to claim 5 output, it is characterized in that, described load condition detects consistent with the quantity of current limliting output unit and the quantity of load, and load condition detects the output with a load of current limliting output unit control, described load condition detect with current limliting output unit comprise that rear one end in parallel is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, load condition detecting unit G that the other end and load are connected
n, current limiting switch S
n, wherein N is natural number, load condition detecting unit G
ndetection information output to central controller MCU.
7. the single-chip intelligent power of the multichannel independence current limliting of bringing onto load state-detection according to claim 6 output, is characterized in that described load condition detecting unit G
ncomprise DC reference voltage source, inductor and operational amplifier, one end, described DC reference voltage source is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with operational amplifier one input; Inductor one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with another input of operational amplifier, load respectively, and the output of described operational amplifier is connected with central controller MCU.
8. the single-chip intelligent power of the multichannel independence current limliting of bringing onto load state-detection according to claim 7 output, is characterized in that described current limiting switch S
nadopt High-side switch, this switch one end is connected between metal-oxide-semiconductor T1 and metal-oxide-semiconductor T2, and the other end is connected with load.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420126661.4U CN203859545U (en) | 2014-03-20 | 2014-03-20 | Single chip intelligent power supply with load state detection and multiple independent current limit output |
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|---|---|---|---|
| CN201420126661.4U CN203859545U (en) | 2014-03-20 | 2014-03-20 | Single chip intelligent power supply with load state detection and multiple independent current limit output |
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| CN203859545U true CN203859545U (en) | 2014-10-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840530A (en) * | 2014-03-20 | 2014-06-04 | 成都市智合微电子有限公司 | Multi-channel independent current limiting output single-chip intelligent power supply with load state detection function |
| CN106451581A (en) * | 2015-08-07 | 2017-02-22 | 中兴通讯股份有限公司 | Voltage reduction control method, voltage reduction control device, voltage reduction controller and charging equipment |
-
2014
- 2014-03-20 CN CN201420126661.4U patent/CN203859545U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840530A (en) * | 2014-03-20 | 2014-06-04 | 成都市智合微电子有限公司 | Multi-channel independent current limiting output single-chip intelligent power supply with load state detection function |
| CN103840530B (en) * | 2014-03-20 | 2016-06-08 | 成都市智合微电子有限公司 | The single-chip intelligent power that the multichannel independence current limliting of bringing onto load state-detection exports |
| CN106451581A (en) * | 2015-08-07 | 2017-02-22 | 中兴通讯股份有限公司 | Voltage reduction control method, voltage reduction control device, voltage reduction controller and charging equipment |
| CN106451581B (en) * | 2015-08-07 | 2021-06-04 | 中兴通讯股份有限公司 | Voltage drop control method and device, voltage drop controller and charging equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20160320 |
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| CF01 | Termination of patent right due to non-payment of annual fee |