CN203071627U - Cell constant-voltage charging control circuit - Google Patents
Cell constant-voltage charging control circuit Download PDFInfo
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- CN203071627U CN203071627U CN 201320080601 CN201320080601U CN203071627U CN 203071627 U CN203071627 U CN 203071627U CN 201320080601 CN201320080601 CN 201320080601 CN 201320080601 U CN201320080601 U CN 201320080601U CN 203071627 U CN203071627 U CN 203071627U
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- npn pipe
- base stage
- pipe
- connects
- collector electrode
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Abstract
The utility model discloses a cell constant-voltage charging control circuit. The cell constant-voltage charging control circuit comprises a biasing circuit, a comparison circuit, and an output drive circuit. The biasing circuit provides bias current for a whole circuit. The comparison circuit performs comparison on reference voltage and cell voltage. The output drive circuit drives and output voltage generated by the comparison circuit. By using the cell constant-voltage charging control circuit, charging control of whole cell voltage is more stable.
Description
Technical field
The utility model relates to integrated circuit technique, refers more particularly to battery constant voltage charge control circuit.
Background technology
In the battery charge integrated circuit, very high to the requirement of battery charging voltage, along with the carrying out of constant current charge, cell voltage rises, and when cell voltage reaches output voltage, enters the constant-potential charge stage.In this stage, cell voltage constantly rises, and in certain voltage, charging current reduces gradually simultaneously by constant.The constant voltage charge control circuit is when battery charging voltage reaches certain voltage, and the output control signal makes charging process enter the constant voltage charge state.Compare and enlarge by cell voltage VBAT and reference voltage V REF, control circuit enters constant voltage charge when VBAT reaches output voltage.
Summary of the invention
The utility model is intended to solve the deficiencies in the prior art, provides a kind of to the more stable battery constant voltage charge control circuit of battery charge control.
Battery constant voltage charge control circuit comprises biasing circuit, comparison circuit and output driving circuit:
Described biasing circuit is to provide bias current to entire circuit;
Described comparison circuit is that reference voltage and cell voltage are compared;
Described output driving circuit is that the voltage that described comparison circuit produces is driven output.
Described biasing circuit comprises first current source and NPN pipe:
One termination power of described first current source, base stage and the collector electrode of the described NPN pipe of another termination;
The base stage of a described NPN pipe and collector electrode connect an end of described first current source, grounded emitter.
Described comparison circuit comprises the 2nd NPN pipe, the 3rd NPN pipe, the 4th NPN pipe, the 5th NPN pipe, the 6th NPN pipe, the 7th NPN pipe, the 8th NPN pipe, the 9th NPN pipe, the tenth NPN pipe, PMOS pipe, the 2nd PMOS pipe and first resistance:
The base stage of described the 2nd NPN pipe connects reference voltage, and collector electrode connects power supply, and emitter connects base stage and the collector electrode of described the 3rd NPN pipe;
The base stage of described the 3rd NPN pipe and collector electrode connect the emitter of described the 2nd NPN pipe, and emitter connects the base stage of collector electrode and described the 7th NPN pipe of described the 4th NPN pipe;
The base stage of described the 4th NPN pipe connects the base stage of a described NPN pipe and an end and the base stage of described the 5th NPN pipe and the base stage of described the 6th NPN pipe of collector electrode and described first current source, collector electrode connects the base stage of emitter and described the 7th NPN pipe of described the 3rd NPN pipe, and emitter connects the emitter of described the 6th NPN pipe and an end of described first resistance;
The base stage of described the 5th NPN pipe connects the base stage of a described NPN pipe and an end and the base stage of described the 4th NPN pipe and the base stage of described the 6th NPN pipe of collector electrode and described first current source, collector electrode connects the emitter of described the 7th NPN pipe and the emitter of described the 8th NPN pipe, grounded emitter;
The base stage of described the 6th NPN pipe connects the base stage of a described NPN pipe and an end and the base stage of described the 4th NPN pipe and the base stage of described the 5th NPN pipe of collector electrode and described first current source, collector electrode connects the base stage of described the 8th NPN pipe and the emitter of described the 9th NPN pipe, and emitter connects the emitter of described the 4th NPN pipe and an end of described first resistance;
The base stage of described the 7th NPN pipe connects the emitter of described the 3rd NPN pipe and the collector electrode of described the 4th NPN pipe, and collector electrode connects grid and the drain electrode of a described PMOS pipe, and emitter connects the emitter of described the 8th NPN pipe and the collector electrode of the 5th NPN pipe;
The base stage of described the 8th NPN pipe connects the emitter of described the 9th NPN pipe and the collector electrode of described the 6th NPN pipe, and collector electrode connects grid and the drain electrode of described the 2nd PMOS pipe, and emitter connects the emitter of described the 7th NPN pipe and the collector electrode of described the 5th NPN pipe;
The base stage of described the 9th NPN pipe and collector electrode connect the emitter of described the tenth NPN pipe, and emitter connects the base stage of described the 8th NPN pipe and the collector electrode of described the 6th NPN pipe;
The base stage of described the tenth NPN pipe connects cell voltage, and collector electrode connects power supply, and emitter connects base stage and the collector electrode of described the 9th NPN pipe;
The grid of a described PMOS pipe and drain electrode connect the collector electrode of described the 7th NPN pipe, and source electrode connects power supply;
The grid of described the 2nd PMOS pipe and drain electrode connect the collector electrode of described the 8th NPN pipe, and source electrode connects power supply;
The emitter of described the 4th NPN pipe of one termination of described first resistance and the emitter of described the 6th NPN pipe, other end ground connection.
Described output driving circuit comprises the 3rd PMOS pipe, the 4th PMOS pipe, the 11 NPN pipe, the 12 NPN pipe and the 13 NPN pipe:
The grid of described the 3rd PMOS pipe connects the grid of a described PMOS pipe and the collector electrode of drain electrode and described the 7th NPN pipe, and drain electrode connects the base stage of described the 11 NPN pipe and the base stage of collector electrode and described the 12 NPN pipe, and source electrode connects power supply;
The grid of described the 4th PMOS pipe connects the base stage of described the 2nd PMOS pipe and the collector electrode of drain electrode and described the 8th NPN pipe, and drain electrode connects the collector electrode of described the 12 NPN pipe, and source electrode connects power supply;
The base stage of described the 11 NPN pipe and collector electrode connect the drain electrode of described the 3rd PMOS pipe and the base stage of described the 12 NPN pipe, and emitter connects the emitter of described the 12 NPN pipe and the collector electrode of described the 13 NPN pipe;
The base stage of described the 12 NPN pipe connects the base stage of described the 11 NPN pipe and the drain electrode of collector electrode and described the 3rd PMOS pipe, collector electrode connects the drain electrode of described the 4th PMOS pipe, and emitter connects the emitter of described the 11 NPN pipe and the collector electrode of described the 13 NPN pipe;
The base stage of described the 13 NPN pipe connects base stage and an end of collector electrode and described first current source and base stage and the base stage of described the 5th NPN pipe and the base stage of described the 6th NPN pipe of described the 4th NPN pipe of a described NPN pipe, collector electrode connects the emitter of described the 11 NPN pipe and the emitter of described the 12 NPN pipe, grounded emitter.
The battery constant voltage charge control circuit that utilizes the utility model to provide can make entire cell voltage charging control more stable.
Description of drawings
Fig. 1 is the circuit diagram of battery constant voltage charge control circuit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model content is further specified.
Battery constant voltage charge control circuit as shown in Figure 1, comprises biasing circuit, comparison circuit and output driving circuit:
Described biasing circuit is to provide bias current to entire circuit;
Described comparison circuit is that reference voltage and cell voltage are compared;
Described output driving circuit is that the voltage that described comparison circuit produces is driven output.
Described biasing circuit comprises first current source 101 and NPN pipe 102:
One termination power VCC of described first current source 101, base stage and the collector electrode of the described NPN pipe 102 of another termination;
The end that the base stage of described NPN pipe 102 and collector electrode connect described first current source 101, grounded emitter.
Described comparison circuit comprises the 2nd NPN pipe the 103, the 3rd NPN pipe the 104, the 4th NPN pipe the 105, the 5th NPN pipe the 106, the 6th NPN pipe the 107, the 7th NPN pipe the 108, the 8th NPN pipe the 109, the 9th NPN pipe the 110, the tenth NPN pipe the 111, the one PMOS pipe the 112, the 2nd PMOS pipe 113 and first resistance 114:
The base stage of described the 2nd NPN pipe 103 meets reference voltage V REF, and collector electrode meets power supply VCC, and emitter connects base stage and the collector electrode of described the 3rd NPN pipe 104;
The base stage of described the 3rd NPN pipe 104 and collector electrode connect the emitter of described the 2nd NPN pipe 103, and emitter connects the base stage of collector electrode and described the 7th NPN pipe 108 of described the 4th NPN pipe 105;
The base stage of described the 4th NPN pipe 105 connects the base stage of described NPN pipe 102 and an end and the base stage of described the 5th NPN pipe 106 and the base stage of described the 6th NPN pipe 107 of collector electrode and described first current source 101, collector electrode connects the base stage of emitter and described the 7th NPN pipe 108 of described the 3rd NPN pipe 104, and emitter connects the emitter of described the 6th NPN pipe 107 and an end of described first resistance 114;
The base stage of described the 5th NPN pipe 106 connects the base stage of described NPN pipe 102 and an end and the base stage of described the 4th NPN pipe 105 and the base stage of described the 6th NPN pipe 107 of collector electrode and described first current source 101, collector electrode connects the emitter of described the 7th NPN pipe 108 and the emitter of described the 8th NPN pipe 109, grounded emitter;
The base stage of described the 6th NPN pipe 107 connects the base stage of described NPN pipe 102 and an end and the base stage of described the 4th NPN pipe 105 and the base stage of described the 5th NPN pipe 106 of collector electrode and described first current source 101, collector electrode connects the base stage of described the 8th NPN pipe 109 and the emitter of described the 9th NPN pipe 110, and emitter connects the emitter of described the 4th NPN pipe 105 and an end of described first resistance 114;
The base stage of described the 7th NPN pipe 108 connects the emitter of described the 3rd NPN pipe 104 and the collector electrode of described the 4th NPN pipe 105, collector electrode connects grid and the drain electrode of described PMOS pipe 112, and emitter connects the emitter of described the 8th NPN pipe 109 and the collector electrode of the 5th NPN pipe 106;
The base stage of described the 8th NPN pipe 109 connects the emitter of described the 9th NPN pipe 110 and the collector electrode of described the 6th NPN pipe 107, collector electrode connects grid and the drain electrode of described the 2nd PMOS pipe 113, and emitter connects the emitter of described the 7th NPN pipe 108 and the collector electrode of described the 5th NPN pipe 106;
The base stage of described the 9th NPN pipe 110 and collector electrode connect the emitter of described the tenth NPN pipe 111, and emitter connects the base stage of described the 8th NPN pipe 109 and the collector electrode of described the 6th NPN pipe 107;
The base stage of described the tenth NPN pipe 111 connects cell voltage, and collector electrode meets power supply VCC, and emitter connects base stage and the collector electrode of described the 9th NPN pipe 110;
The grid of described PMOS pipe 112 and drain electrode connect the collector electrode of described the 7th NPN pipe 108, and source electrode meets power supply VCC;
The grid of described the 2nd PMOS pipe 113 and drain electrode connect the collector electrode of described the 8th NPN pipe 109, and source electrode meets power supply VCC;
The emitter of described the 4th NPN pipe 105 of one termination of described first resistance 114 and the emitter of described the 6th NPN pipe 107, other end ground connection.
Described output driving circuit comprises the 3rd PMOS pipe the 115, the 4th PMOS pipe 116, the 11 NPN pipe 117, the 12 NPN pipe the 118 and the 13 NPN pipe 119:
The grid of described the 3rd PMOS pipe 115 connects the grid of described PMOS pipe 112 and the collector electrode of drain electrode and described the 7th NPN pipe 108, drain electrode connects the base stage of described the 11 NPN pipe 117 and the base stage of collector electrode and described the 12 NPN pipe 118, and source electrode meets power supply VCC;
The grid of described the 4th PMOS pipe 116 connects the base stage of described the 2nd PMOS pipe 113 and the collector electrode of drain electrode and described the 8th NPN pipe 109, and drain electrode connects the collector electrode of described the 12 NPN pipe 118, and source electrode meets power supply VCC;
The base stage of described the 11 NPN pipe 117 and collector electrode connect the drain electrode of described the 3rd PMOS pipe 115 and the base stage of described the 12 NPN pipe 118, and emitter connects the emitter of described the 12 NPN pipe 118 and the collector electrode of described the 13 NPN pipe 119;
The base stage of described the 12 NPN pipe 118 connects the base stage of described the 11 NPN pipe 117 and the drain electrode of collector electrode and described the 3rd PMOS pipe 115, collector electrode connects the drain electrode of described the 4th PMOS pipe 116, and emitter connects the emitter of described the 11 NPN pipe 117 and the collector electrode of described the 13 NPN pipe 119;
The base stage of described the 13 NPN pipe 119 connects base stage and an end of collector electrode and described first current source 101 and base stage and the base stage of described the 5th NPN pipe 106 and the base stage of described the 6th NPN pipe 107 of described the 4th NPN pipe 105 of described NPN pipe 102, collector electrode connects the emitter of described the 11 NPN pipe 117 and the emitter of described the 12 NPN pipe 118, grounded emitter.
The utility model discloses a kind of battery constant voltage charge control circuit, and describe embodiment of the present utility model and effect with reference to the accompanying drawings.What should be understood that is: above-described embodiment is just to explanation of the present utility model, rather than to restriction of the present utility model, any utility model that does not exceed in the utility model connotation scope is created, and all falls within the utility model protection range.
Claims (4)
1. battery constant voltage charge control circuit is characterized in that comprising biasing circuit, comparison circuit and output driving circuit:
Described biasing circuit is to provide bias current to entire circuit;
Described comparison circuit is that reference voltage and cell voltage are compared;
Described output driving circuit is that the voltage that described comparison circuit produces is driven output.
2. battery constant voltage charge control circuit as claimed in claim 1 is characterized in that described biasing circuit comprises first current source and NPN pipe:
One termination power of described first current source, base stage and the collector electrode of the described NPN pipe of another termination;
The base stage of a described NPN pipe and collector electrode connect an end of described first current source, grounded emitter.
3. battery constant voltage charge control circuit as claimed in claim 1 is characterized in that described comparison circuit comprises the 2nd NPN pipe, the 3rd NPN pipe, the 4th NPN pipe, the 5th NPN pipe, the 6th NPN pipe, the 7th NPN pipe, the 8th NPN pipe, the 9th NPN pipe, the tenth NPN pipe, PMOS pipe, the 2nd PMOS pipe and first resistance:
The base stage of described the 2nd NPN pipe connects reference voltage, and collector electrode connects power supply, and emitter connects base stage and the collector electrode of described the 3rd NPN pipe;
The base stage of described the 3rd NPN pipe and collector electrode connect the emitter of described the 2nd NPN pipe, and emitter connects the base stage of collector electrode and described the 7th NPN pipe of described the 4th NPN pipe;
The base stage of described the 4th NPN pipe connects the base stage of a described NPN pipe and an end and the base stage of described the 5th NPN pipe and the base stage of described the 6th NPN pipe of collector electrode and described first current source, collector electrode connects the base stage of emitter and described the 7th NPN pipe of described the 3rd NPN pipe, and emitter connects the emitter of described the 6th NPN pipe and an end of described first resistance;
The base stage of described the 5th NPN pipe connects the base stage of a described NPN pipe and an end and the base stage of described the 4th NPN pipe and the base stage of described the 6th NPN pipe of collector electrode and described first current source, collector electrode connects the emitter of described the 7th NPN pipe and the emitter of described the 8th NPN pipe, grounded emitter;
The base stage of described the 6th NPN pipe connects the base stage of a described NPN pipe and an end and the base stage of described the 4th NPN pipe and the base stage of described the 5th NPN pipe of collector electrode and described first current source, collector electrode connects the base stage of described the 8th NPN pipe and the emitter of described the 9th NPN pipe, and emitter connects the emitter of described the 4th NPN pipe and an end of described first resistance;
The base stage of described the 7th NPN pipe connects the emitter of described the 3rd NPN pipe and the collector electrode of described the 4th NPN pipe, and collector electrode connects grid and the drain electrode of a described PMOS pipe, and emitter connects the emitter of described the 8th NPN pipe and the collector electrode of the 5th NPN pipe;
The base stage of described the 8th NPN pipe connects the emitter of described the 9th NPN pipe and the collector electrode of described the 6th NPN pipe, and collector electrode connects grid and the drain electrode of described the 2nd PMOS pipe, and emitter connects the emitter of described the 7th NPN pipe and the collector electrode of described the 5th NPN pipe;
The base stage of described the 9th NPN pipe and collector electrode connect the emitter of described the tenth NPN pipe, and emitter connects the base stage of described the 8th NPN pipe and the collector electrode of described the 6th NPN pipe;
The base stage of described the tenth NPN pipe connects cell voltage, and collector electrode connects power supply, and emitter connects base stage and the collector electrode of described the 9th NPN pipe;
The grid of a described PMOS pipe and drain electrode connect the collector electrode of described the 7th NPN pipe, and source electrode connects power supply;
The grid of described the 2nd PMOS pipe and drain electrode connect the collector electrode of described the 8th NPN pipe, and source electrode connects power supply;
The emitter of described the 4th NPN pipe of one termination of described first resistance and the emitter of described the 6th NPN pipe, other end ground connection.
4. battery constant voltage charge control circuit as claimed in claim 1 is characterized in that described output driving circuit comprises the 3rd PMOS pipe, the 4th PMOS pipe, the 11 NPN pipe, the 12 NPN pipe and the 13 NPN pipe:
The grid of described the 3rd PMOS pipe connects the grid of a described PMOS pipe and the collector electrode of drain electrode and described the 7th NPN pipe, and drain electrode connects the base stage of described the 11 NPN pipe and the base stage of collector electrode and described the 12 NPN pipe, and source electrode connects power supply;
The grid of described the 4th PMOS pipe connects the base stage of described the 2nd PMOS pipe and the collector electrode of drain electrode and described the 8th NPN pipe, and drain electrode connects the collector electrode of described the 12 NPN pipe, and source electrode connects power supply;
The base stage of described the 11 NPN pipe and collector electrode connect the drain electrode of described the 3rd PMOS pipe and the base stage of described the 12 NPN pipe, and emitter connects the emitter of described the 12 NPN pipe and the collector electrode of described the 13 NPN pipe;
The base stage of described the 12 NPN pipe connects the base stage of described the 11 NPN pipe and the drain electrode of collector electrode and described the 3rd PMOS pipe, collector electrode connects the drain electrode of described the 4th PMOS pipe, and emitter connects the emitter of described the 11 NPN pipe and the collector electrode of described the 13 NPN pipe;
The base stage of described the 13 NPN pipe connects base stage and an end of collector electrode and described first current source and base stage and the base stage of described the 5th NPN pipe and the base stage of described the 6th NPN pipe of described the 4th NPN pipe of a described NPN pipe, collector electrode connects the emitter of described the 11 NPN pipe and the emitter of described the 12 NPN pipe, grounded emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320080601 CN203071627U (en) | 2013-02-21 | 2013-02-21 | Cell constant-voltage charging control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320080601 CN203071627U (en) | 2013-02-21 | 2013-02-21 | Cell constant-voltage charging control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203071627U true CN203071627U (en) | 2013-07-17 |
Family
ID=48770377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320080601 Expired - Fee Related CN203071627U (en) | 2013-02-21 | 2013-02-21 | Cell constant-voltage charging control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203071627U (en) |
-
2013
- 2013-02-21 CN CN 201320080601 patent/CN203071627U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20140221 |