CN203909968U - Residual current type electrical fire monitor power circuit - Google Patents
Residual current type electrical fire monitor power circuit Download PDFInfo
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- CN203909968U CN203909968U CN201420353458.0U CN201420353458U CN203909968U CN 203909968 U CN203909968 U CN 203909968U CN 201420353458 U CN201420353458 U CN 201420353458U CN 203909968 U CN203909968 U CN 203909968U
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- power circuit
- electrical fire
- pin
- fire monitor
- residual
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Abstract
The utility model discloses a residual current type electrical fire monitor power circuit. The circuit is characterized in that a switching power source and a capacitor Cin are connected to the VIN pin of a switching voltage stabilization chip K1, the OUT pin of the K1 is connected with a coil L1 and then connected to the IN pin of a linear voltage stabilization chip K2, a resistor R17 and a resistor R18 are serially connected and then connected to the IN pin of the K2, a capacitor Cf and the R18 are connected in parallel and then connected to the FB pin of the K1, a diode D3 of which the positive electrode is grounded is connected between the K1 and the L1, a grounding capacitor C10 and a grounding capacitor C11 are connected between the L1 and the IN pin of the K2, and the OUT output line of the K2 is connected with a grounding capacitor C12 and a grounding capacitor C13. The design has advantages of simple line design and reliable performance, and the voltage stabilization power supply requirement of an electrical fire monitoring detector can be effectively satisfied.
Description
Technical field
The design relates to residual-current electrical fire monitor power circuit, belongs to electric detection technique field.
Background technology
Detector for electric fire protection refers to the detector of the electrical fire such as residual current, the temperature risk parameters variation of surveying in protected circuit.Be to prevent and important technology equipment that detection of fires occurs, it is by the detection to environment temperature, electric current, in the time of breaking out of fire dangerous, and alarm cut off circuit.Wherein the DC/DC translation function of 5V realized 24V and turns by power circuit, is watch-dog important component part.
Summary of the invention
According to above-mentioned requirements, the utility model provides a kind of residual-current electrical fire monitor power circuit, and circuit is simple, and voltage stabilizing is reliable.
For achieving the above object, the design realizes by following technological means:
A kind of residual-current electrical fire monitor power circuit, it is characterized in that: the VIN pin of conversion electric power and capacitor C in access switching regulator IC K1, after the OUT pin wiring circle L1 of K1, access the IN pin of linear voltage stabilization chip K2, the IN of access K2 after resistance R 17, R18 series connection, the capacitor C f FB that afterwards access K1 in parallel with R18, between K1 and L1, be connected to the diode D3 of plus earth, between the IN of L1 and K2 pin, there are direct earth capacitance C10, C11, on K2OUT outlet line, have capacitor C 12, the C13 of ground connection.
Preferred:
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: described switching regulator IC model is LM2596-ADJ.
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: described switched linear chip model is LM2940.
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: described diode model is IN5825.
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: described coil L1 capacity is 0.8 μ H.
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: input K1 supply voltage is 24V, and K2 output voltage is 5V.
The invention has the beneficial effects as follows: the design's circuit is simple that dependable performance can effectively meet the voltage stabilizing power requirement of detector for electric fire protection.
Brief description of the drawings
Fig. 1 is the utility model circuit diagram.
Embodiment
Below in conjunction with Figure of description, design is further described.
As shown in Figure 1, the DC/DC translation function of 5 V realized 24 V and turns by power circuit, and power circuit design adopts 2 grades of change-over circuits.Switching regulator IC advantage is high, the difficult heating of transformation efficiency, and shortcoming is that ripple is large.Linear voltage stabilization chip transformation efficiency is low, but ripple is less.The 12 V voltages that the design adopts switching regulator IC LM2596 to generate the first order connect the cascade system of linear voltage stabilization chip LM2940 again, in the minimum situation of heat radiation, obtain 5 V D.C. regulated power supplies.
A kind of residual-current electrical fire monitor power circuit, it is characterized in that: the VIN pin of conversion electric power and capacitor C in access switching regulator IC K1, after the OUT pin wiring circle L1 of K1, access the IN pin of linear voltage stabilization chip K2, the IN of access K2 after resistance R 17, R18 series connection, the capacitor C f FB that afterwards access K1 in parallel with R18, between K1 and L1, be connected to the diode D3 of plus earth, between the IN of L1 and K2 pin, there are direct earth capacitance C10, C11, on K2OUT outlet line, have capacitor C 12, the C13 of ground connection.
Preferred:
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: described switching regulator IC model is LM2596-ADJ.
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: described switched linear chip model is LM2940.
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: described diode model is IN5825.
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: described coil L1 capacity is 0.8 μ H.
Described a kind of residual-current electrical fire monitor power circuit, is characterized in that: input K1 supply voltage is 24V, and K2 output voltage is 5V.
More than show and described the design's ultimate principle, principal character and advantage.The technician of the industry should understand; the design is not restricted to the described embodiments; the principle that the design is just described of describing in above-described embodiment and instructions; do not departing under the prerequisite of the design's spirit and scope; the design also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the design.The claimed scope of the design is defined by appending claims and equivalent thereof.
Claims (6)
1. a residual-current electrical fire monitor power circuit, it is characterized in that: the VIN pin of conversion electric power and capacitor C in access switching regulator IC K1, after the OUT pin wiring circle L1 of K1, access the IN pin of linear voltage stabilization chip K2, the IN of access K2 after resistance R 17, R18 series connection, the capacitor C f FB that afterwards access K1 in parallel with R18, between K1 and L1, be connected to the diode D3 of plus earth, between the IN of L1 and K2 pin, there are direct earth capacitance C10, C11, on K2OUT outlet line, have capacitor C 12, the C13 of ground connection.
2. a kind of residual-current electrical fire monitor power circuit as claimed in claim 1, is characterized in that: described switching regulator IC model is LM2596-ADJ.
3. a kind of residual-current electrical fire monitor power circuit as claimed in claim 1, is characterized in that: described switched linear chip model is LM2940.
4. a kind of residual-current electrical fire monitor power circuit as claimed in claim 1, is characterized in that: described diode model is IN5825.
5. a kind of residual-current electrical fire monitor power circuit as claimed in claim 1, is characterized in that: described coil L1 capacity is 0.8 μ H.
6. a kind of residual-current electrical fire monitor power circuit as claimed in claim 1, is characterized in that: input K1 supply voltage is 24V, and K2 output voltage is 5V.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201420353458.0U CN203909968U (en) | 2014-06-30 | 2014-06-30 | Residual current type electrical fire monitor power circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201420353458.0U CN203909968U (en) | 2014-06-30 | 2014-06-30 | Residual current type electrical fire monitor power circuit |
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CN203909968U true CN203909968U (en) | 2014-10-29 |
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CN201420353458.0U Expired - Fee Related CN203909968U (en) | 2014-06-30 | 2014-06-30 | Residual current type electrical fire monitor power circuit |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104103144A (en) * | 2014-06-30 | 2014-10-15 | 苏州原点工业设计有限公司 | Residual current electrical fire monitor power supply circuit |
-
2014
- 2014-06-30 CN CN201420353458.0U patent/CN203909968U/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104103144A (en) * | 2014-06-30 | 2014-10-15 | 苏州原点工业设计有限公司 | Residual current electrical fire monitor power supply circuit |
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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: 20141029 Termination date: 20150630 |
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EXPY | Termination of patent right or utility model |