CN203574423U - Integration voltage stabilization and low voltage detection power supply chip applied to electronic product - Google Patents
Integration voltage stabilization and low voltage detection power supply chip applied to electronic product Download PDFInfo
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- CN203574423U CN203574423U CN201320769071.9U CN201320769071U CN203574423U CN 203574423 U CN203574423 U CN 203574423U CN 201320769071 U CN201320769071 U CN 201320769071U CN 203574423 U CN203574423 U CN 203574423U
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- voltage
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- output voltage
- voltage detection
- stopcock
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Abstract
The utility model provides an integration voltage stabilization and low voltage detection power supply chip applied to an electronic product. The power supply chip comprises an input voltage port, an output voltage port, an output voltage detection unit, a low voltage detection unit and a linear voltage stabilization unit. The linear voltage stabilization unit comprises a turn-off switch. The output voltage detection unit is respectively connected with the turn-off switch and the output voltage port, and controls on and off states of the turn-off switch. The low voltage detection unit is connected with the linear voltage stabilization unit. According to the utility model, the output voltage detection unit, the LDO linear voltage stabilization unit and the low voltage detection unit are integrated; the output voltage detection unit controls on and off of the turn-off switch according to output voltage; after an IC detects low voltage, a VOUT is turned off after a period of delay; through the arrangement, the cost of a user system is reduced and the design is simplified; precise monitoring is carried out on the state of a battery; the service life of the battery is prolonged; and frequent system restart can be avoided.
Description
Technical field
The utility model belongs to electronic toy field, specially refers to a kind of power management chip circuit.
Background technology
In existing toy industry, mostly all realized Electronic Control, but because toy is the product that disappear soon, producer lacks systematized research and development aspect power management, thereby on existing toy circit, still exists following shortcoming:
(1) protection for rechargeable battery and dry cell can not be effectively provided, shorter battery life can be caused;
(2) because existing LVD electric circuit inspection mode detection range is narrow, cause the frequent switch of power supply, thereby after battery over-discharge, produce leakage, equipment is caused to corrosion;
(3) under burst large current load situation, can produce disturbance to system, cause frequently makeing mistakes;
(4) IC adstante febre cannot be protected;
(5) powered battery cannot voltage stabilizing when low pressure.
Utility model content
For the problems referred to above, the utility model provides a kind of power supply chip of avoiding system frequent starting, battery over-discharge can to cause the lost of life and carry out low-voltage voltage stabilizing.
Be achieved through the following technical solutions above-mentioned purpose:
A kind of integrated voltage-stabilized of electronic product and power supply chip that low pressure detects of being applied to, comprise input voltage port, output voltage port, output voltage detecting unit, low-voltage detecting unit and linear voltage stabilization unit, described output voltage detecting unit is connected with linear voltage stabilization unit, described low-voltage detecting unit comprises interconnective voltage detection unit and voltage comparison unit, described linear voltage stabilization unit comprises stopcock, described voltage detection unit is electrically connected with stopcock, described output voltage detecting unit is connected with stopcock and output voltage port respectively, control the on off operating mode of stopcock, the positive terminal of voltage comparison unit is connected with upper voltage limit input, end of oppisite phase is connected with lower voltage limit input, low-voltage detecting unit is connected with described linear voltage stabilization unit by enable switch, between described voltage comparison unit and voltage detection unit, be connected to a timing capacitor.
As further describing of the power supply chip that the above-mentioned integrated voltage-stabilized that is applied to electronic product and low pressure are detected, described stopcock is metal-oxide-semiconductor, and output voltage detecting unit output is connected with the grid of metal-oxide-semiconductor.
As further describing of the power supply chip that the above-mentioned integrated voltage-stabilized that is applied to electronic product and low pressure are detected, between described stopcock and output voltage port, be connected to an over-temperature protection unit.
The beneficial effects of the utility model are: integrated LDO linear voltage stabilization unit and LVD input low-voltage detecting unit, the cost of reduction custom system, simplified design, output voltage detecting unit and voltage comparison unit are set, output voltage detecting unit can be according to the break-make of output voltage control stopcock, as when output is short-circuited, output voltage detecting unit can turn-off VOUT output, protection is had suffered circuit and is not had damage, voltage comparison unit is for comparing to input voltage and upper lower limit value, bound magnitude of voltage can pass through VSET1, the external resistance of VSET2 pin is adjusted, when motor is during in starting state, when input voltage is during lower than the magnitude of voltage of lower voltage limit input, IC controls stopcock and disconnects, output voltage VO UT is zero, after input voltage is higher than higher limit, controlling stopcock connects, output voltage recovers output again.Meanwhile, IC detects after low-voltage, can not turn-off VOUT at once, time delay a period of time, and this time can be adjusted by external TCAP timing capacitor; Integrated OTA over-temperature protection unit, can detect IC state of temperature in time; This novel IC chip is more accurate to battery status monitoring, extending battery life, and can avoid system frequently to restart.
Accompanying drawing explanation
Fig. 1 is circuit connection diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing to this novel being further described:
A kind of integrated voltage-stabilized of electronic product and power supply chip that low pressure detects of being applied to, comprise input voltage port Vdd, output voltage port Vout, output voltage detecting unit SCP, low-voltage detecting unit LVD and linear voltage stabilization unit LDO, described output voltage detecting unit SCP is connected with linear voltage stabilization unit LDO, described low-voltage detecting unit LVD comprises interconnective voltage detection unit and voltage comparison unit OP, described linear voltage stabilization unit comprises stopcock MOS, described voltage detection unit is electrically connected with stopcock MOS, described output voltage detecting unit SCP is connected with stopcock and output voltage port Vout respectively, the on off operating mode of voltage detection unit and output voltage detecting unit SCP co-controlling stopcock, the positive terminal of voltage comparison unit is connected with upper voltage limit input Vset2, end of oppisite phase is connected with lower voltage limit input Vset1, low-voltage detecting unit is connected with described linear voltage stabilization unit LDO by enable switch EN, what LDO exported is the output voltage of whole IC, this voltage can need the load of voltage stabilizing to power in order to offer, between described voltage comparison unit OP and voltage detection unit, be connected to a timing capacitor Tcap.
As further describing of the power supply chip that the above-mentioned integrated voltage-stabilized that is applied to electronic product and low pressure are detected, described stopcock is metal-oxide-semiconductor, and output voltage detecting unit SCP output is connected with the grid of metal-oxide-semiconductor.
As further describing of the power supply chip that the above-mentioned integrated voltage-stabilized that is applied to electronic product and low pressure are detected; between described stopcock and output voltage port Vout, be connected to an over-temperature protection unit OTA; by OTA over-temperature protection unit is set, can detect in time IC state of temperature.
Be used on the battery products such as toy, growth in time, cell voltage can slowly reduce, and when cell voltage is low to a certain extent time, IC wants shutoff voltage output, not so battery over-discharge, battery can damage or leakage.But during for toy product, owing to there being the large current elements such as motor in toy, and powered battery is limited in one's ability, when motor starting, power consumption is larger, and voltage may be lower, and at this moment stopcock can turn-off output (LVD detects after the low-voltage of input, can not turn-off Vout at once, stopcock is wanted time delay a period of time, and this time can be controlled adjustment by external Tcap timing capacitor), after motor starting completes, cell voltage can recover, and at this moment stopcock recovers to control output.(if there is the time of low-voltage, be less than the turn-off delay time of setting, Vout can not turn-off, and the time that low-voltage occurs, while being greater than turn-off delay time, VOUT just can turn-off), the exportable voltage of LDO, can need the load of voltage stabilizing to power in order to offer simultaneously.
The above not imposes any restrictions this novel technical scope, and all any modification, equivalent variations and modifications of above embodiment being done according to the utility model technical spirit all still belong in the scope of this novel technical scheme.
Claims (3)
1. one kind is applied to the integrated voltage-stabilized of electronic product and the power supply chip that low pressure detects, comprise input voltage port and output voltage port, it is characterized in that: also comprise output voltage detecting unit, low-voltage detecting unit and linear voltage stabilization unit, described output voltage detecting unit is connected with linear voltage stabilization unit, described low-voltage detecting unit comprises interconnective voltage detection unit and voltage comparison unit, described linear voltage stabilization unit comprises stopcock, described voltage detection unit is electrically connected with stopcock, described output voltage detecting unit is connected with stopcock and output voltage port respectively, control the on off operating mode of stopcock, the positive terminal of voltage comparison unit is connected with upper voltage limit input, end of oppisite phase is connected with lower voltage limit input, low-voltage detecting unit is connected with described linear voltage stabilization unit by enable switch, between described voltage comparison unit and voltage detection unit, be connected to a timing capacitor.
2. a kind of integrated voltage-stabilized of electronic product and power supply chip that low pressure detects of being applied to according to claim 1, is characterized in that: described stopcock is metal-oxide-semiconductor, and output voltage detecting unit output is connected with the grid of metal-oxide-semiconductor.
3. a kind of integrated voltage-stabilized of electronic product and power supply chip that low pressure detects of being applied to according to claim 1, is characterized in that: between described stopcock and output voltage port, be connected to an over-temperature protection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320769071.9U CN203574423U (en) | 2013-11-30 | 2013-11-30 | Integration voltage stabilization and low voltage detection power supply chip applied to electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320769071.9U CN203574423U (en) | 2013-11-30 | 2013-11-30 | Integration voltage stabilization and low voltage detection power supply chip applied to electronic product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203574423U true CN203574423U (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320769071.9U Expired - Fee Related CN203574423U (en) | 2013-11-30 | 2013-11-30 | Integration voltage stabilization and low voltage detection power supply chip applied to electronic product |
Country Status (1)
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| CN (1) | CN203574423U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049717A (en) * | 2014-06-16 | 2014-09-17 | 天地融科技股份有限公司 | Power saving control circuit and electronic equipment |
-
2013
- 2013-11-30 CN CN201320769071.9U patent/CN203574423U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049717A (en) * | 2014-06-16 | 2014-09-17 | 天地融科技股份有限公司 | Power saving control circuit and electronic equipment |
| CN104049717B (en) * | 2014-06-16 | 2017-02-22 | 天地融科技股份有限公司 | Power saving control circuit and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140430 Termination date: 20161130 |