CN201758349U - Low power consumption circuit by using circuit starting resistor as bleeder resistor - Google Patents

Low power consumption circuit by using circuit starting resistor as bleeder resistor Download PDF

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Publication number
CN201758349U
CN201758349U CN2010201733632U CN201020173363U CN201758349U CN 201758349 U CN201758349 U CN 201758349U CN 2010201733632 U CN2010201733632 U CN 2010201733632U CN 201020173363 U CN201020173363 U CN 201020173363U CN 201758349 U CN201758349 U CN 201758349U
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circuit
voltage
resistance
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starting
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Expired - Fee Related
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CN2010201733632U
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Chinese (zh)
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王星光
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TPV Electronics Fujian Co Ltd
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TPV Electronics Fujian Co Ltd
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Abstract

The utility model discloses a low power consumption circuit by using circuit starting resistor as bleeder resistor, which is connected in a power supply main circuit. The power supply main circuit comprises a control chip, a starting resistor connected with the control chip, and an X capacitor arranged in the front end of the power supply main circuit, and the low power consumption circuit comprises a voltage detection circuit connected in the power supply main circuit, a reference voltage circuit, a voltage comparison circuit and a voltage releasing execution circuit for the bleeder resistor which converts the starting resistor into the X capacitor. In the low power consumption circuit, voltage on the X capacitor end is detected via the voltage detection circuit, and the detected voltage is then compared with the voltage of the reference voltage circuit via the voltage comparison circuit. The comparison result can be used to control voltage discharge for the bleeder resistor which converts the starting resistor connected with the control chip into the X capacitor, when an electronic device is under normal operation, startup or shutdown. The low power consumption circuit is low in power consumption, and can discharge power of an X capacitor in a circuit, when power supply is cut off.

Description

A kind of low consumption circuit that utilizes circuit starting resistor as bleeder resistance
Technical field the utility model relates to a kind of power circuit, relates in particular to a kind of low consumption circuit that utilizes circuit starting resistor as bleeder resistance.
X electric capacity in the various consumer electronics product power circuits of background technology is to be parallel to power input in order to filtering L, the filter capacitor of the difference mode signal between the N line.For the sake of security, the safety of various consumer electronics products requires product voltage on the X electric capacity after pulling out power line to release, its way generally is the L at power input, a string bleeder resistance in parallel again between the N line, and the product of the resistance of this bleeder resistance and X electric capacity is generally less than 1 second, select 0.47uF as X electric capacity, then the bleeder resistance maximum of corresponding parallel connection reaches 2M ohm.
The above-mentioned bleeder resistance that appends this and the parallel connection of X electric capacity can satisfy the requirement that the safety standard is released to the voltage on the X electric capacity, but will increase the power loss of electronic product simultaneously, particularly under the electronic product holding state, it is bigger than normal that its power loss accounts for the ratio of total stand-by power consumption, for example: when input ac voltage is 240V, stand-by power consumption under holding state is about the electronic product of 0.1W, the power consumption of the bleeder resistance that it is in parallel with X electric capacity is about 0.0288W, its ratio that accounts for total stand-by power consumption reaches 28.8%, wastes many energy.And effort is all being done for improving the efficiency utilization in countries in the world at present, the energy-conservation mechanism of various countries has formulated start power consumption and the stand-by power consumption of more and more stricter efficiency standard with strictness control electronic product, therefore, in order to reduce the electronic product power loss, must reduce or cancel the power loss that causes because of X electric capacity bleeder resistance.
Summary of the invention the utility model purpose provide a kind of starting resistance that utilizes the Switching Power Supply control chip as X electric capacity bleeder resistance, can effectively reduce the low consumption circuit of electronic product power consumption.
The utility model adopts following scheme to realize: the utility model low consumption circuit is connected in the electric power main circuit, described electric power main circuit comprises control chip, the starting resistance that links to each other with control chip, be located at the X electric capacity of electric power main circuit front end, wherein low consumption circuit comprises voltage detecting circuit, reference voltage circuit, voltage comparator circuit, executive circuit, the X capacitance terminal that is connected in described voltage detecting circuit detects X electric capacity both end voltage, described reference voltage circuit is connected in the electric power main circuit and provides reference voltage for voltage comparator circuit, described voltage comparator circuit links to each other with voltage detecting circuit and reference voltage circuit respectively and carries out voltage ratio, described executive circuit links to each other with electric power main circuit and voltage comparator circuit respectively, and described executive circuit is converted to described starting resistance X electric capacity when electric power main circuit access failure power supply bleeder resistance carries out voltage and releases.
Described voltage detecting circuit comprises coupling capacitance, current-limiting resistance, the half-wave rectifying circuit that electrically connects successively, described half-wave rectifying circuit comprises diode, voltage stabilizing didoe, detection sampling capacitor, and described detection sampling capacitor two ends also are parallel with the sampling capacitor bleeder resistance.
Described reference voltage circuit comprises voltage stabilizing didoe and the voltage regulation resistance that links to each other with this voltage stabilizing didoe negative pole, and described voltage regulation resistance links to each other with the energization pins of described control chip again.
Described voltage comparator circuit comprises a PNP triode, the collector electrode resistance grounded of described PNP triode, the emitter of described PNP triode connects the positive pole of the voltage stabilizing didoe in the described reference voltage circuit, and the base stage of described PNP triode links to each other with described half-wave rectifying circuit output again.
Described executive circuit comprises the diode that negative pole links to each other with starting resistance one end, this diode cathode is connected to the X capacitance terminal, the described starting resistance other end links to each other with the collector electrode of a NPN triode, the base stage of described NPN triode links to each other through the collector electrode of the described PNP triode in base resistance and the described voltage comparator circuit, and the emitter of described NPN triode is ground connection again.
The starting resistance that the utility model utilization links to each other with control chip is as X electric capacity bleeder resistance, utilize voltage detecting circuit to detect X capacitance terminal voltage, the voltage that detected voltage is outputed to voltage comparator circuit and reference voltage circuit and provides compares, and the starting resistance that is linked to each other by comparative result control executive circuit utilization and control chip carries out the normal boot-strap operation and when electric power main circuit is not connected power supply X electric capacity carried out voltage and release when start again.
The beneficial effects of the utility model are: the starting resistance that the utility model utilization links to each other with control chip is as X electric capacity bleeder resistance, both guaranteed that electronic product can meet the requirement that the safety standard is discharged to the X electric capacity in the circuit during electric power main circuit access failure power supply after pulling out power line, again because of not increasing extra bleeder resistance at X electric capacity two ends, the power loss of entire circuit is low, the utility model can energy savings, is fit to promote the use of.
Description of drawings now is further elaborated the utility model in conjunction with the accompanying drawings:
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment as shown in Figure 1, the utility model is connected in the electric power main circuit 1, electric power main circuit 1 comprises control chip 11, be located at the X electric capacity 12 of electric power main circuit 1 front end, the starting resistance 13 that links to each other with control chip 11, low consumption circuit comprises voltage detecting circuit 2, reference voltage circuit 3, voltage comparator circuit 4, executive circuit 5, described voltage detecting circuit 2 is connected in X electric capacity 12 ends and detects X electric capacity 12 both end voltage, described reference voltage circuit 3 is connected in the electric power main circuit 1 and provides reference voltage for voltage comparator circuit 4, described voltage comparator circuit 4 links to each other with voltage detecting circuit 2 and reference voltage circuit 3 respectively and carries out voltage ratio, described executive circuit 5 links to each other with electric power main circuit 1 and voltage comparator circuit 4 respectively, and described executive circuit 5 is converted to described starting resistance 13 X electric capacity 12 when electric power main circuit 1 access failure power supply bleeder resistance carries out voltage and releases.
Described voltage detecting circuit 2 comprises coupling capacitance C957, current-limiting resistance R959, the half-wave rectifying circuit 21 that electrically connects successively, described half-wave rectifying circuit 21 comprises diode D945, voltage stabilizing didoe ZD943, detects sampling capacitor C958, and described detection sampling capacitor C958 two ends also are parallel with sampling capacitor bleeder resistance R960.
Described reference voltage circuit 3 comprises voltage stabilizing didoe ZD942 and the voltage regulation resistance R958 that links to each other with voltage stabilizing didoe ZD942 negative pole, and described voltage regulation resistance R958 links to each other with the energization pins of control chip 11 again; During the electronic product operate as normal, the voltage of half-wave rectifying circuit 21 outputs of voltage detecting circuit 2 output is higher than the reference voltage that reference voltage circuit 3 provides.
Described voltage comparator circuit 4 comprises a PNP triode Q942, the collector electrode of this PNP triode Q942 is through resistance R 961 ground connection, the emitter of this PNP triode Q942 connects the positive pole of the voltage stabilizing didoe ZD942 in the described reference voltage circuit 3, and the base stage of this PNP triode Q942 links to each other with described half-wave rectifying circuit 21 outputs again; During the electronic product operate as normal, the voltage of half-wave rectifying circuit 21 outputs of voltage detecting circuit 2 output is higher than the reference voltage that reference voltage circuit 3 provides, and this PNP triode Q942 ends.
Described executive circuit 5 comprises the diode D946 that negative pole links to each other with starting resistance 13 1 ends, diode D946 positive pole is connected to X electric capacity 12 ends, starting resistance 13 other ends link to each other with the collector electrode of a NPN triode Q943, the base stage of NPN triode Q943 links to each other through the collector electrode of the PNP triode Q942 in base resistance R962 and the described voltage comparator circuit 4, and the emitter of NPN triode Q943 is ground connection again.Starting resistance 13 comprises two continuous resistance R 948, R949, and X electric capacity 12 comprises capacitor C 917, C918.
When the electronic product normal boot-strap moves, half-wave rectifying circuit 21 outputs of voltage detecting circuit 2 have voltage, and this moment is because the filter capacitor in the electric power main circuit 1 that control chip 11 power supply pin link is still uncharged, the voltage that reference voltage circuit 3 provides is zero, PNP triode Q942 is ended, thereby NPN triode Q943 is also ended, the alternating voltage of power input input is through diode D946, starting resistance 13 is input to the high voltage startup pin of control chip 11 and gives the charging of the filter capacitor in the electric power main circuit 1 that is connected in control chip 11 power supply pin, up to finishing the starting up, electronic product begins normal operation.
When the electronic product operate as normal, half-wave rectifying circuit 21 outputs of voltage detecting circuit 2 have voltage, but be higher than the reference voltage that reference voltage circuit 3 provides, so PNP triode Q942 ends, thereby NPN triode Q943 is also ended, when making electronic product keep the normal boot-strap operation, can not increase power loss.
After electronic product is pulling out power line, voltage detecting circuit 2 does not have the alternating voltage input, voltage on the detection sampling capacitor C958 in the voltage detecting circuit 2 is through the sampling capacitor bleeder resistance R960 decline of releasing, when the voltage on detecting sampling capacitor C958 is lower than the reference voltage that reference voltage circuit 3 provides, PNP triode Q942 conducting, thereby NPN triode Q943 conducting, the CE Exchange Settlement that the voltage on the X electric capacity 12 leads to diode D946, resistance R 948, R949, NPN triode Q943 bleeds off.

Claims (5)

1. low consumption circuit that utilizes circuit starting resistor as bleeder resistance, it is connected in the electric power main circuit, described electric power main circuit comprises control chip, the starting resistance that links to each other with control chip, be located at the X electric capacity of electric power main circuit front end, it is characterized in that: low consumption circuit comprises voltage detecting circuit, reference voltage circuit, voltage comparator circuit, executive circuit, the X capacitance terminal that is connected in described voltage detecting circuit detects X electric capacity both end voltage, described reference voltage circuit is connected in the electric power main circuit and provides reference voltage for voltage comparator circuit, described voltage comparator circuit links to each other with voltage detecting circuit and reference voltage circuit respectively and carries out voltage ratio, described executive circuit links to each other with electric power main circuit and voltage comparator circuit respectively, and described executive circuit is converted to described starting resistance the bleeder resistance of X electric capacity when electric power main circuit access failure power supply.
2. a kind of low consumption circuit that utilizes circuit starting resistor as bleeder resistance according to claim 1, it is characterized in that: described voltage detecting circuit comprises coupling capacitance, current-limiting resistance, the half-wave rectifying circuit that electrically connects successively, described half-wave rectifying circuit comprises diode, voltage stabilizing didoe, detection sampling capacitor, and described detection sampling capacitor two ends also are parallel with the sampling capacitor bleeder resistance.
3. a kind of low consumption circuit that utilizes circuit starting resistor as bleeder resistance according to claim 1, it is characterized in that: described reference voltage circuit comprises voltage stabilizing didoe and the voltage regulation resistance that links to each other with this voltage stabilizing didoe negative pole, and described voltage regulation resistance links to each other with the energization pins of described control chip again.
4. a kind of low consumption circuit that utilizes circuit starting resistor as bleeder resistance according to claim 1, it is characterized in that: described voltage comparator circuit comprises a PNP triode, the collector electrode resistance grounded of described PNP triode, the emitter of described PNP triode connects the positive pole of the voltage stabilizing didoe in the described reference voltage circuit, and the base stage of described PNP triode links to each other with described half-wave rectifying circuit output again.
5. according to claim 1 or 4 described a kind of low consumption circuits that utilize circuit starting resistor as bleeder resistance, it is characterized in that: described executive circuit comprises the diode that negative pole links to each other with starting resistance one end, this diode cathode is connected to the X capacitance terminal, the described starting resistance other end links to each other with the collector electrode of a NPN triode, the base stage of described NPN triode links to each other through the collector electrode of the described PNP triode in base resistance and the described voltage comparator circuit, and the emitter of described NPN triode is ground connection again.
CN2010201733632U 2010-04-28 2010-04-28 Low power consumption circuit by using circuit starting resistor as bleeder resistor Expired - Fee Related CN201758349U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101814823A (en) * 2010-04-28 2010-08-25 福建捷联电子有限公司 Low power consumption circuit using circuit starting resistor as bleeder resistor
CN102684777A (en) * 2012-06-14 2012-09-19 青岛海信宽带多媒体技术有限公司 Optical module and initialization method and device thereof
CN102801339A (en) * 2012-08-28 2012-11-28 矽力杰半导体技术(杭州)有限公司 AC/DC voltage converting circuit with low stand-by power consumption and control method thereof
TWI491153B (en) * 2012-01-20 2015-07-01 Delta Electronics Shanghai Co Discharge circuit and converter
CN105099134A (en) * 2014-05-20 2015-11-25 艾默生网络能源有限公司 Method and device for discharging voltage of direct current bus capacitor in power electronic conversion system
CN106849636A (en) * 2017-04-13 2017-06-13 四川长虹电器股份有限公司 For the control circuit of Switching Power Supply

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101814823A (en) * 2010-04-28 2010-08-25 福建捷联电子有限公司 Low power consumption circuit using circuit starting resistor as bleeder resistor
CN101814823B (en) * 2010-04-28 2012-12-12 福建捷联电子有限公司 Low power consumption circuit using circuit starting resistor as bleeder resistor
US9263939B2 (en) 2012-01-20 2016-02-16 Delta Electronics (Shanghai) Co., Ltd. Capacitor discharging circuit and converter
TWI491153B (en) * 2012-01-20 2015-07-01 Delta Electronics Shanghai Co Discharge circuit and converter
CN102684777A (en) * 2012-06-14 2012-09-19 青岛海信宽带多媒体技术有限公司 Optical module and initialization method and device thereof
CN102801339A (en) * 2012-08-28 2012-11-28 矽力杰半导体技术(杭州)有限公司 AC/DC voltage converting circuit with low stand-by power consumption and control method thereof
CN102801339B (en) * 2012-08-28 2014-07-16 矽力杰半导体技术(杭州)有限公司 AC/DC voltage converting circuit with low stand-by power consumption and control method thereof
CN105099134A (en) * 2014-05-20 2015-11-25 艾默生网络能源有限公司 Method and device for discharging voltage of direct current bus capacitor in power electronic conversion system
CN105099134B (en) * 2014-05-20 2018-07-06 维谛技术有限公司 The drainage method and device of dc-link capacitance voltage in Technics of Power Electronic Conversion system
CN106849636A (en) * 2017-04-13 2017-06-13 四川长虹电器股份有限公司 For the control circuit of Switching Power Supply

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Granted publication date: 20110309

Termination date: 20130428