CN202353849U - Control circuit of Light emitting diode (LED) lamps for miners - Google Patents
Control circuit of Light emitting diode (LED) lamps for miners Download PDFInfo
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- CN202353849U CN202353849U CN201120346697XU CN201120346697U CN202353849U CN 202353849 U CN202353849 U CN 202353849U CN 201120346697X U CN201120346697X U CN 201120346697XU CN 201120346697 U CN201120346697 U CN 201120346697U CN 202353849 U CN202353849 U CN 202353849U
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- control circuit
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- 238000007600 charging Methods 0.000 claims abstract description 46
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 34
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000005955 Ferric phosphate Substances 0.000 claims description 4
- 229940032958 ferric phosphate Drugs 0.000 claims description 4
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 claims description 4
- 229910000399 iron(III) phosphate Inorganic materials 0.000 claims description 4
- 238000010277 constant-current charging Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 abstract description 3
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000005286 illumination Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 241001085205 Prenanthella exigua Species 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
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Abstract
本实用新型公开了一种LED矿工灯控制电路。该电路主要包括锂电池充电控制电路、锂电池放电控制电路和开关控制电路。充电控制电路包括高精度磷酸铁锂电池充电管理及保护集成电路LTC4054、电阻R1、R2、充电指示LED3和外接电源指示LED4等，充电采用预充电-恒流-恒压-再充电方式；锂电池放电控制电路包括线性电流调制电路UCT4611A、电阻R3和MOSFET管T2；开关控制电路包括4位同步计数器CD40161、几个电阻、电容、两个三极管T1、T3和点动开关K1，可对主光源、辅光源状态进行组合控制。本实用新型的控制电路简单、性能稳定，有效提高了LED矿工灯的可靠性，是一种安全、可靠、价格低廉的实用矿工灯控制电路。
The utility model discloses a control circuit for an LED miner's lamp. The circuit mainly includes a lithium battery charge control circuit, a lithium battery discharge control circuit and a switch control circuit. The charging control circuit includes high-precision lithium iron phosphate battery charging management and protection integrated circuit LTC4054, resistors R1, R2, charging indicator LED3 and external power indicator LED4, etc., charging adopts pre-charging-constant current-constant voltage-recharging method; lithium battery The discharge control circuit includes a linear current modulation circuit UCT4611A, resistor R3 and MOSFET tube T2; the switch control circuit includes a 4-bit synchronous counter CD40161, several resistors, capacitors, two triodes T1, T3 and a jog switch K1, which can control the main light source, Combined control of auxiliary light source status. The utility model has a simple control circuit and stable performance, effectively improves the reliability of the LED miner's lamp, and is a safe, reliable and cheap practical miner's lamp control circuit.
Description
Technical field
The utility model relates to a kind of LED miner's lamp control circuit.
Background technology
Miner's lamp is the illuminations of miner in underground work, and the performance of miner's lamp directly has influence on the operating efficiency and the safety of down-hole miner.Miner's lamp begins to adopt lithium ion battery (being designated hereinafter simply as lithium battery) and super bright Light-Emitting Diode (being designated hereinafter simply as LED) in recent years.Lithium battery has and pollutes for a short time, and the application cycle is long, and volume is little, and is in light weight, and the life-span reaches 100,000 hours.Adopt lithium battery can make miner's lamp realize integral type, all-sealed structure has improved reliability, can under abominable inflammable and explosive environment, use.The control circuit of used LED miner's lamp is to adopt discrete component mostly on the China market at present, and the control of main light source, secondary light source is to use the multi-position switch assembly basically.In order further to improve reliability and fail safe, should adopt application-specific integrated circuit (ASIC) and noncontacting switch design control circuit more reliably.
Summary of the invention
The utility model technical problem to be solved; Be to overcome the defective that exists in the existing product; A kind of safe, reliable, cheap practical miner's lamp equipment is provided; Can use a point driving switch to carry out Combination Control to main light source, secondary light source state, main light source, secondary light source not only can independently be lighted but also can be lighted simultaneously when needed, guarantee the light source guarantee under various situation.
In order to realize the foregoing invention purpose, the technical scheme that the utility model adopts is following:
LED miner's lamp control circuit; Mainly comprise lithium cell charging control circuit, lithium battery charge/discharge control circuit and ON-OFF control circuit: charging control circuit comprises high accuracy ferric phosphate lithium cell Charge Management and protection integrated circuit LTC4054, resistance R 1, resistance R 2, charging indication LED 3 and external power supply indication LED 4, and the 1 pin CHRG of said integrated circuit LTC4054 connects the negative electrode of charging indication LED 3; The 3 pin BAT of integrated circuit LTC4054 connect the positive pole of lithium battery, and are lithium battery charge/discharge control circuit, ON-OFF control circuit, and the general supply VCC of main and auxiliary light source; The lithium battery charge/discharge control circuit comprises linear current modulation circuit UCT4611A, resistance R 3 and MOSFET pipe T2; The 3 pin LED of said charge/discharge control circuit UCT4611A connect the source electrode of main light source control switch MOSFET pipe T2; The negative electrode of main light source LED2 connects the drain electrode of MOSFET pipe T2, and the anode of main light source LED2 meets power supply VCC; ON-OFF control circuit comprises 4 bit synchronization counter CD40161, resistance, electric capacity, triode T1, triode T3 and point driving switch K1; Triode T1 is the switch that is used for controlling secondary light source LED1, and the output Q1 of coincidence counter CD40161, output Q2, output Q3 control the conducting of said triode T1, MOSFET pipe T2 and triode T3 respectively.
Wherein, the 3 pin BAT pin level of said integrated circuit LTC4054 are lower than 2.9V, and then charger gets into the trickle charge pattern, and about 1/10 setting charging current is provided, so that cell voltage is promoted to a safety level, thereby realize full current charges; When 3 pin BAT pin level were higher than 2.9V, charger got into constant current charging mode, and constant charging current is provided; When 3 pin BAT pin voltage reach final float charge voltage 4.2V, get into constant-voltage mode, and charging current begins to reduce; When charging current drop to set point 1/10 the time, charging finishes.Lithium cell charging adopts the mode of precharge-constant current-constant voltage-recharge, and both can effectively protect battery, guarantees again the making full use of of battery capacity brought into play the characteristic of high power capacity ferric phosphate lithium cell to greatest extent.
The utility model adopts special-purpose charge and discharge of advanced high accuracy lithium battery and protection integrated circuit, have overcharge, functions such as overdischarge, overvoltage, overheated, short-circuit protection; Two kinds of light sources adopt the non-contact switch circuit design of control capable of being combined, use a point driving switch to carry out Combination Control to main light source, secondary light source state, not only can work independently but also can work simultaneously when needed; Simple, the stable performance of circuit has effectively improved the reliability of LED miner's lamp, and can directly be contained on the existing charging rack in colliery and charge.
Description of drawings
Fig. 1 is the schematic diagram of the utility model LED miner's lamp control circuit.
Embodiment
Below in conjunction with accompanying drawing 1 and instantiation, the utility model is done further explain.
The utility model is realized the foregoing invention purpose in order to make miner's lamp, should adopt at first that brightness is high, power-saving, the life-span is grown, reliable and stable large-power light-emitting diodes, the firm difficult fragmentation of light-emitting diode, so good reliability, and maintenance cost is low.The required operating current of large-power light-emitting diodes that can satisfy the miner's lamp requirement is about 200mA～350mA, can select the little lithium battery of capacity like this for use, can reduce the weight and the price of lithium battery.In addition; Inner must add that charge and discharge are controlled, overcharged at the miner's lamp control circuit, overdischarge and circuit such as short-circuit protection, temperature protection; Not only protect lithium battery, and turn on light, turn off the light even can not produce spark during external short circuit, really guaranteed trouble free service.
The present embodiment miner's lamp is established two function light sources, that is: main light source LED2 is 1 watt of super bright White LED, and secondary light source LED1 is super bright 0.1 watt of White LED.
As shown in Figure 1, the lithium cell charging control circuit is mainly managed and is protected elements such as integrated circuit LTC4054 (U1), resistance R 1, charging indication LED 3, external power supply indication LED 4 to form by high accuracy lithium battery special charging.The 4 pin VCC of integrated circuit LTC4054 connect external power source (5V); The 5 pin PROG of integrated circuit LTC4054 are used for setting charging current; Connect an outer meeting resistance R1 through this pin; To regulate outer meeting resistance R1, just can set the drive current of LED. charging current is 1000 times of 5 pin PROG pin output currents.
Outer meeting resistance R1 and charging current I
CHGCalculate by formula:
I
CHG=1000 (V
PROG/ R1), V wherein
PROG=1V, charging current is given by resistance R 1.
In the present embodiment, resistance R 1 is 2000 ohm, and charging current is 500mA.The 3 pin BAT of integrated circuit LTC4054 connect lithium battery anode, in case the 4 pin VCC of integrated circuit LTC4054 insert external power source, just give lithium cell charging, finish up to charging with the precharge-constant current-constant voltage-mode that recharges.The charging control circuit that adds makes it can utilize existing charging rack charging, reduces investment outlay.In order to improve the security performance of lithium battery, can adopt the fabulous ferric phosphate lithium cell of security performance simultaneously.
The 1 pin CHRG end of lithium battery integrated circuit LTC4054 is the state output pin, and charging indication level is provided.When lithium battery is connected to charger, promptly begin charging cycle, the 1 pin CHRG pin of integrated circuit LTC4054 is pulled to low level, and this pin can absorb the electric current up to 10mA, to drive a LED.Charging indication LED 3 in the utility model circuit is used for the ongoing red LED of indication charging.When charging cycle finished, then the 1 pin CHRG pin of integrated circuit LTC4054 became high impedance, and charging indication LED 3 is extinguished, and the indication charging cycle finishes.
External power supply indication LED 4 in the present embodiment circuit is to be used to indicate external power source to insert the green LED of charging circuit.Charging indication LED 3, external power supply indication LED 4 are the little LED of diameter 3mm.
The lithium battery charge/discharge control circuit is made up of linear current drive integrated circult UCT4611A (U2), resistance R 3, MOSFET pipe T2 etc. in the utility model circuit.Linear current drive integrated circult UCT4611A is the linear current modulation circuit of a 2.7V of working in to 6V; Can the constant current up to 800mA be provided to large-power light-emitting diodes, its inner integrated high-power MOSFET tube of high-precision voltage reference source, error amplifier, current adjustment unit and low pressure differential.In addition, also has overheat protector, functions such as LED open circuit, short-circuit protection; When the light-emitting diodes tube short circuit causes the junction temperature of linear current drive integrated circult UCT4611A to surpass 125 owing to transshipping perhaps
℃The time, linear current drive integrated circult UCT4611A gets into the overheat protector state, and in this case, the device inside power tube is turned off, and does not have electric current to flow into LED, and the protection device can not be damaged.When the junction temperature of linear current drive integrated circult UCT4611A is lower than 114
℃The time, linear current drive integrated circult UCT4611A discharges from hot guard mode automatically, again operate as normal.When overload or LED short circuit, linear current drive integrated circult UCT4611A will constantly switch between hot protected mode and normal mode of operation like this, thereby reach the purpose of protection device.
The 1 pin VDD of linear current drive integrated circult UCT4611A is a power positive end, connects the positive pole of lithium battery; The 3 pin LED of linear current drive integrated circult UCT4611A are output pins, are connected with the negative electrode of light-emitting diode.3 pin of the utility model circuit neutral line current drives integrated circuit UCT4611A link to each other with the source electrode of MOSFET pipe T2; MOSFET pipe T2 is the switch of control main light source LED2; When the grid of MOSFET pipe T2 is high level (when the output Q2 of coincidence counter CD40161 is 1); MOSFET pipe T2 conducting, then the drive current of linear current drive integrated circult UCT4611A flows through MOSFET pipe T2 and the main light source LED2 that links to each other with MOSFET pipe T2 drain electrode, thereby lights main light source LED2.The 4 pin ISET of linear current drive integrated circult UCT4611A are that the LED constant current is provided with end; Constant current realizes that through between the 4 pin ISET pins of linear current drives integrated circuit UCT4611A and 1 pin VDD pin, connecting a resistance R 3 formula that calculates electric current is: ILED=910 volt/R3.Wherein, the unit of ILED is an ampere (A), and the unit of resistance R 3 is ohm.In the present embodiment, resistance R 3 is 3600 ohm, the about 250mA of the constant current of main light source LED2.
ON-OFF control circuit is made up of 4 bit synchronization counter CD40161 (U3), transistor T 1, T2 and T3, resistance, electric capacity and point driving switch K1 in the utility model circuit.Coincidence counter CD40161 is one 4 bit synchronization counter, under the effect of clock pulse CLK, carries out binary counting, and this circuit only count down to 3 (binary numbers 000-100).The 1 pin CL of coincidence counter CD40161 is a reset terminal, and resistance R 5, capacitor C 3 constitute its electrify restoration circuit, and the 2 pin CLK of coincidence counter CD40161 are count pulse inputs.After pressing point driving switch K1 for the first time, coincidence counter CD40161 is 001 (binary number), and its output Q1 is a high level 1, triode T1 conducting, and corresponding secondary light source LED1 lights; Press point driving switch K1 when the 2nd time, coincidence counter CD40161 is 010 (binary number), and its output Q2 is a high level 1, MOSFET pipe T2 conducting, and corresponding main light source LED2 lights; Press point driving switch K1 when the 3rd time, coincidence counter CD40161 is 011 (binary number), and its output Q1, output Q2 are high level 1 simultaneously, triode T1, triode T2 conducting simultaneously, and corresponding secondary light source LED1, main light source LED2 light simultaneously; When the 4th is pressed point driving switch K1, coincidence counter CD40161 is 100 (binary numbers), and its output Q3 is a high level 1; Triode T3 conducting; The collector electrode C of triode T3 is a low level, because the collector electrode C utmost point of triode T3 connects the CLR end (clear terminal) of coincidence counter CD40161, thereby makes coincidence counter CD40161 zero clearing; Return to initial condition, main light source LED2, secondary light source LED1 all extinguish.
Because the shake of point driving switch K1 has been eliminated in the filter action of capacitor C 2, can not make the counter miscount.This coincidence counter CD40161 uses a point driving switch K1 to carry out Combination Control to main light source LED2, secondary light source LED1, and has adopted noncontacting switch, can not produce spark, uses in any environment and can not cause danger.The utility model circuit is the energy conservation state when only using secondary light source, can keep the miner and under the low situation of brightness of illumination, use, to prolong lighting hours.Owing to adopt the two light sources of main light source and secondary light source, can constitute above-mentioned lighting system, and a light source damage then another still can normally use, guaranteed safe in utilization under any condition.
Claims (2)
1.LED miner's lamp control circuit; Mainly comprise lithium cell charging control circuit, lithium battery charge/discharge control circuit and ON-OFF control circuit; It is characterized in that: charging control circuit comprises high accuracy ferric phosphate lithium cell Charge Management and protection integrated circuit LTC4054, resistance R 1, resistance R 2, charging indication LED 3 and external power supply indication LED 4, and the 1 pin CHRG of said integrated circuit LTC4054 connects the negative electrode of charging indication LED 3; The 3 pin BAT of integrated circuit LTC4054 connect the positive pole of lithium battery, and are lithium battery charge/discharge control circuit, ON-OFF control circuit, and the general supply VCC of main and auxiliary light source; The lithium battery charge/discharge control circuit comprises linear current modulation circuit UCT4611A, resistance R 3 and MOSFET pipe T2; The 3 pin LED of said charge/discharge control circuit UCT4611A connect the source electrode of main light source control switch MOSFET pipe T2; The negative electrode of main light source LED2 connects the drain electrode of MOSFET pipe T2, and the anode of main light source LED2 meets power supply VCC; ON-OFF control circuit comprises 4 bit synchronization counter CD40161, resistance, electric capacity, triode T1, triode T3 and point driving switch K1; Triode T1 is the switch that is used for controlling secondary light source LED1, and the output Q1 of coincidence counter CD40161, output Q2, output Q3 control the conducting of said triode T1, MOSFET pipe T2 and triode T3 respectively.
2. LED miner's lamp control circuit according to claim 1 is characterized in that, when the 3 pin BAT pin level of said integrated circuit LTC4054 are lower than 2.9V, then charger gets into the trickle charge pattern, and about 1/10 setting charging current is provided; When 3 pin BAT pin level were higher than 2.9V, charger got into constant current charging mode, and constant charging current is provided; When 3 pin BAT pin voltage reach final float charge voltage 4.2V, get into constant-voltage mode, and charging current begins to reduce; When charging current drop to set point 1/10 the time, charging finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120346697XU CN202353849U (en) | 2011-09-16 | 2011-09-16 | Control circuit of Light emitting diode (LED) lamps for miners |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120346697XU CN202353849U (en) | 2011-09-16 | 2011-09-16 | Control circuit of Light emitting diode (LED) lamps for miners |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202353849U true CN202353849U (en) | 2012-07-25 |
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ID=46542803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120346697XU Expired - Fee Related CN202353849U (en) | 2011-09-16 | 2011-09-16 | Control circuit of Light emitting diode (LED) lamps for miners |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202353849U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024431A (en) * | 2015-07-30 | 2015-11-04 | 安徽中杰信息科技有限公司 | Battery charging circuit and charging method thereof |
| CN105491708A (en) * | 2015-12-18 | 2016-04-13 | 上海小糸车灯有限公司 | Rear position lamp of auto and control circuit for controlling multiple light sources on/off synchronously |
-
2011
- 2011-09-16 CN CN201120346697XU patent/CN202353849U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024431A (en) * | 2015-07-30 | 2015-11-04 | 安徽中杰信息科技有限公司 | Battery charging circuit and charging method thereof |
| CN105491708A (en) * | 2015-12-18 | 2016-04-13 | 上海小糸车灯有限公司 | Rear position lamp of auto and control circuit for controlling multiple light sources on/off synchronously |
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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 |
Granted publication date: 20120725 Termination date: 20140916 |
|
| EXPY | Termination of patent right or utility model |