CN215073068U - Emergency lamp circuit and integrated IC for emergency lamp - Google Patents
Emergency lamp circuit and integrated IC for emergency lamp Download PDFInfo
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- CN215073068U CN215073068U CN202120604432.9U CN202120604432U CN215073068U CN 215073068 U CN215073068 U CN 215073068U CN 202120604432 U CN202120604432 U CN 202120604432U CN 215073068 U CN215073068 U CN 215073068U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The utility model provides an emergency light circuit and be used for integrated IC of emergency light, integrated IC includes the integrated IC plate body, and the border all around of integrated IC plate body is provided with a plurality of pins, and the inside of integrated IC plate body is provided with the PCB board of being connected with a plurality of pins, includes charge control circuit, charge control switch, interchange detection circuitry, LED control switch, oscillator control circuit and protection switch on the PCB board, from this, the utility model discloses with the detection module of emergency light and rechargeable battery's charge-discharge management module integration on an integrated I C plate body for its peripheral circuit is simpler.
Description
Technical Field
The application relates to the technical field of emergency lamps, in particular to an emergency lamp circuit and an integrated IC (integrated circuit) for the emergency lamp.
Background
The emergency lamp is an assembly of lamps for emergency lighting. Most emergency lamps are mainly of the type with independent control of a power supply, a normal power supply is connected with a common lighting power supply loop, a rechargeable battery in the emergency lamp is charged at ordinary times, and when the normal power supply is cut off, the rechargeable battery automatically supplies power. The battery of the emergency lamp needs to be charged and discharged when the emergency lamp is used, overhauled and broken down.
At present, detection circuits of emergency lamps are all analog circuits built by triodes and MOS tubes, so that not only are the cost increased by peripheral components, but also the fault performance and the maintenance burden are increased; because the emergency light has still used the lithium cell as rechargeable battery, and the unstable characteristic of lithium lining, will control voltage, electric current in charging process, guarantee that the battery can not damage the electric core and the life of lithium cell because of phenomenons such as excessive pressure, overcurrent, overcharge, overdischarge, let the battery have the explosion risk, still need to use the overcharge and overdischarge protection management IC of lithium cell, still need increase a rechargeable battery's charge management IC simultaneously, but some producers are because of cost problem, directly do not rechargeable battery charge management IC, just so increased the electric core risk and the life of damaging rechargeable battery.
SUMMERY OF THE UTILITY MODEL
The application provides an integrated IC for emergency light, it can be integrated on an integrated IC plate body with the detection module of emergency light and rechargeable battery's charge-discharge management module.
According to an aspect of the present application, there is provided in one embodiment an integrated IC for an emergency lamp, comprising: integrated IC plate body, integrated IC plate body's border all around is provided with a plurality of pins, and is a plurality of the pin includes: the emergency lamp comprises a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin and a seventh pin, wherein the first pin is used for connecting a first voltage supply end, the second pin is used for connecting an emergency lamp, the third pin is used for connecting the anode of a rechargeable battery of the emergency lamp, the fourth pin is used for connecting a mains supply, the fifth pin is used for connecting the cathode of the rechargeable battery of the emergency lamp, the sixth pin is used for connecting the ground, and the seventh pin is used for connecting a constant current source;
the inside of integrated IC plate body be provided with a plurality of the PCB board that the pin is connected, include on the PCB board:
the charging control circuit is used for detecting the charging voltage of the rechargeable battery and outputting a first control signal or a second control signal according to the charging voltage;
the charging control switch is connected between the first pin and the third pin, and is turned off in response to a first control signal so as to disconnect the first pin and the third pin; the charging control switch is also turned on in response to a second control signal to connect the first pin and the third pin;
the alternating current detection circuit is connected to the fourth pin and used for detecting whether commercial power is input through the fourth pin, detecting the magnitude relation between the impedance value between the fourth pin and the sixth pin and the trigger impedance value, and outputting a first LED control signal or a second LED control signal according to the detection result;
the LED control switch is connected between the second pin and the third pin, and is turned on in response to a first LED control signal so as to connect the third pin and the second pin; the LED control switch is turned off in response to a second LED control signal to disconnect the third pin and the second pin;
the oscillator control circuit is used for detecting the discharge current of the rechargeable battery and outputting a first protection signal or a second protection signal according to the discharge current;
the protection switch is connected between the fifth pin and the sixth pin and is used for being turned off in response to a first protection signal so as to disconnect the fifth pin and the sixth pin; the protection switch is turned on in response to a second protection signal to connect the fifth pin and the sixth pin.
In one embodiment, the detection circuit is configured to:
when the mains supply input is detected through the fourth pin and the impedance value between the fourth pin and the sixth pin is larger than the trigger impedance value, outputting a second LED control signal;
when the commercial power input is detected through the fourth pin and the impedance value between the fourth pin and the sixth pin is smaller than or equal to the trigger impedance value, outputting a second LED control signal;
when no mains supply input is detected through the fourth pin and the impedance value between the fourth pin and the sixth pin is larger than the trigger impedance value, outputting a second LED control signal;
and when no mains supply input is detected through the fourth pin and the impedance value between the fourth pin and the sixth pin is less than or equal to the trigger impedance value, outputting a first LED control signal.
In one embodiment, the charging control circuit is further configured to detect a charging temperature of the rechargeable battery, and output a third control signal to the charging control switch according to the charging temperature, where the third control signal is used to reduce a magnitude of a charging current between the first pin and the third pin;
the charging circuit is further used for detecting the charging current of the rechargeable battery and outputting a fourth control signal to the charging control switch according to the charging current, and the fourth control signal is used for controlling the magnitude of the charging current between the first pin and the third pin.
In one embodiment, the PCB further comprises:
the positive phase input end of the first comparator is connected with the second voltage supply end, the negative phase input end of the first comparator is connected with the first reference voltage supply end, and the output end of the first comparator is connected with the pin A of the charging control circuit;
the positive phase input end of the second comparator is connected with the seventh pin, one end of the first resistor and the constant current source, the other end of the first resistor is connected with the ground, the negative phase input end of the second comparator is connected with the second reference voltage supply end, and the output end of the second comparator is connected with the pin B of the charging control circuit;
a positive phase input end of the third comparator is connected with an output end of a temperature sensor, the temperature sensor is used for outputting a voltage corresponding to the charging temperature, a negative phase input end of the third comparator is connected with a third reference voltage providing end, and an output end of the third comparator is connected with a pin C of the charging control circuit;
and a positive phase input end of the fourth comparator is connected with the third pin, a negative phase input end of the fourth comparator is connected with a fourth reference voltage providing end, and an output end of the fourth comparator is connected with a pin D of the charging control circuit.
In one embodiment, the PCB further comprises: a fifth comparator, a sixth comparator, a seventh comparator;
the positive phase input end of the fifth comparator is connected with the positive phase input end of the sixth comparator and the positive phase input end of the seventh comparator, and the positive phase input end of the fifth comparator is also connected with the overcurrent and short-circuit protection voltage detection end of the rechargeable battery; the negative phase input end of the fifth comparator is connected with the first overcurrent latching threshold voltage providing end, the negative phase input end of the sixth comparator is connected with the second overcurrent latching threshold voltage providing end, the negative phase input end of the seventh comparator is connected with the load short-circuit latching threshold voltage providing end, and the output end of the fifth comparator, the output end of the sixth comparator and the output end of the seventh comparator are connected with the oscillator control circuit.
In one embodiment, the protection circuit further comprises a driving circuit connected between the oscillator control circuit and the protection switch, and used for driving the protection switch to be switched on or switched off.
According to an aspect of the present application, there is provided in one embodiment an emergency lamp circuit comprising: the device comprises a current limiting module, a filtering module, a charging current resistor, an integrated IC, a rechargeable battery and an emergency lamp module, wherein the integrated IC is described in the embodiment;
the current limiting module is connected with the mains supply input end and is used for limiting the current of a current signal output by the mains supply input end;
the filtering module is connected with the current limiting module and used for filtering the voltage signal output by the current limiting module and outputting the filtered voltage signal to a fourth pin of the integrated IC;
the charging current resistor is connected between the ground and a seventh pin of the integrated IC;
the sixth pin of the integrated IC is connected with the ground, the third pin of the integrated IC is connected with the positive electrode of the rechargeable battery, the fifth pin of the integrated IC is connected with the negative electrode of the rechargeable battery, the second pin of the integrated IC is connected with the input end of the emergency lamp module, and the first pin of the integrated IC is connected with the first voltage supply end.
According to integrated IC for emergency light of above-mentioned embodiment, it includes the integrated IC plate body, the border all around of integrated IC plate body is provided with a plurality of pins, and the inside of integrated IC plate body is provided with the PCB board of being connected with a plurality of pins, including charge control circuit, charge control switch, interchange detection circuitry, LED control switch, oscillator control circuit and protection switch on the PCB board, from this, the utility model discloses detection module with emergency light and rechargeable battery's charge-discharge management module integration is on an integrated IC plate body for its peripheral circuit is simpler.
Drawings
FIG. 1 is a schematic diagram of an integrated IC of an emergency light according to an embodiment;
fig. 2 is a schematic structural diagram of an emergency lamp circuit according to an embodiment.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments, and the operation steps involved in the embodiments may be interchanged or modified in order as will be apparent to those skilled in the art. Accordingly, the description and drawings are merely for clarity of description of certain embodiments and are not intended to necessarily refer to a required composition and/or order.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
Referring to fig. 1, fig. 1 is a schematic structural diagram of an integrated IC of an emergency lamp according to an embodiment, where the integrated IC includes: integrated IC plate body, integrated IC plate body's border all around is provided with a plurality of pins, and wherein a plurality of pins include: the emergency lamp comprises a first pin VDD for connecting a first voltage supply end, a second pin VLED for connecting an emergency lamp, a third pin BAT + for connecting the anode of a rechargeable battery of the emergency lamp, a fourth pin VinL for connecting a mains supply, a fifth pin BAT-for connecting the cathode of the rechargeable battery of the emergency lamp, a sixth pin GND for connecting the ground and a seventh pin RPR for connecting a constant current source.
The inside of integrated circuit board body is provided with the PCB board of being connected with a plurality of pins, wherein includes on the PCB board: the charging control circuit, the charging control switch, the alternating current detection electricity, the LED control switch, the oscillator control circuit and the protection switch.
The charging control circuit is used for detecting the charging voltage of the rechargeable battery and outputting a first control signal or a second control signal according to the charging voltage.
The charging control switch is connected between the first pin VDD and the third pin BAT +, and the charging control switch is turned off in response to a first control signal so as to disconnect the first pin VDD and the third pin BAT +; the charge control switch is further turned on in response to a second control signal to connect the first pin VDD and the third pin BAT +.
In this embodiment, the charge control switch includes a first pole, a second pole and a control pole, the first pole of the charge control switch is connected to the first pin VDD, the second pole of the charge control switch is connected to the third pin BAT +, the control pole of the charge control switch is connected to the E pin of the charge control circuit, and the control pole is configured to receive the first control signal or the second control signal. In this embodiment, the charge control switch is an MOS transistor, wherein the first pole may be a drain or a source of the MOS transistor, the corresponding second pole may be a source or a drain of the MOS transistor, and the control pole is a gate of the MOS transistor.
The alternating current detection circuit is connected to the fourth pin VinL and used for detecting whether commercial power is input through the fourth pin VinL, detecting the magnitude relation between the impedance value between the fourth pin VinL and the sixth pin GND and the trigger impedance value, and outputting a first LED control signal or a second LED control signal according to a detection result.
The LED control switch is connected between the second pin VLED and the third pin BAT +, and the LED control switch is turned on in response to the first LED control signal so that the third pin BAT + is connected with the second pin VLED; the LED control switch is turned off in response to the second LED control signal to disconnect the third pin BAT + and the second pin VLED. The second pin VLED is connected to an emergency light, which is used to drive the emergency light.
In one embodiment, in the emergency state, the emergency lamp is driven to be turned on when the second pin VLED outputs a high level, and the emergency lamp is turned off when the second pin VLED outputs a low level. The method is realized by the following steps:
when the alternating current detection circuit detects that commercial power is input through the fourth pin VinL, and the impedance value between the fourth pin VinL and the sixth pin GND is larger than the trigger impedance value, the alternating current detection circuit outputs a second LED control signal, the LED control switch responds to the second LED control signal to be turned off, the second pin VLED outputs a low level, and the emergency lamp is turned off. In other embodiments, the emergency light can also be operated electrically from the mains via other supply branches.
When the alternating current detection circuit detects that commercial power is input through the fourth pin VinL, and the impedance value between the fourth pin VinL and the sixth pin GND is smaller than or equal to the trigger impedance value, the alternating current detection circuit outputs a second LED control signal, the LED control switch responds to the second LED control signal to be turned off, the second pin VLED outputs low level, and the emergency lamp is turned off. In other embodiments, the emergency light can also be operated electrically from the mains via other supply branches.
When the alternating current detection circuit detects that no commercial power is input through the fourth pin VinL, and the impedance value between the fourth pin VinL and the sixth pin GND is larger than the trigger impedance value, the alternating current detection circuit outputs a second LED control signal, the LED control switch responds to the second LED control signal to be turned off, the second pin VLED outputs a low level, and the emergency lamp is turned off. At this moment, because the commercial power has cut off the power supply, emergency light also can't pass through commercial power supply work.
When the alternating current detection circuit detects that no commercial power is input through the fourth pin VinL, and the impedance value between the fourth pin VinL and the sixth pin GND is smaller than or equal to the trigger impedance value, the alternating current detection circuit outputs a first LED control signal, the LED control switch responds to the conduction of the first LED control signal, the rechargeable battery outputs a high level through the second pin VLED, and the emergency lamp is driven to work in an emergency state (commercial power is disconnected).
The trigger impedance value is 500K Ω in this embodiment.
In this embodiment, the LED control switch includes a first pole, a second pole, and a control pole, the first pole of the LED control switch is connected to the second pole of the charging control switch, the second pole of the LED control switch is connected to the second pin VLED, the control pole of the LED control switch is connected to the ac detection circuit, and the control pole is configured to receive the first LED control signal or the second LED control signal. In this embodiment, the LED control switch is an MOS transistor, wherein the first pole may be a drain or a source of the MOS transistor, the corresponding second pole may be a source or a drain of the MOS transistor, and the control pole is a gate of the MOS transistor.
The oscillator control circuit is used for detecting the discharge current of the rechargeable battery and outputting a first protection signal or a second protection signal according to the discharge current.
The protection switch is connected between the fifth pin BAT-and the sixth pin GND, and is used for responding to a first protection signal to turn off so as to disconnect the fifth pin BAT-and the sixth pin GND; the protection switch is turned on in response to the second protection signal to connect the fifth pin BAT-and the sixth pin GND.
If the oscillator control circuit detects that a short circuit occurs after the rechargeable battery is loaded or detects that the discharge current is greater than a set value (overcurrent) or the voltage of the rechargeable battery is lower than the set value by 2.7V (overdischarge), outputting a first protection signal to disconnect a protection switch, thereby realizing the functions of short-circuit protection, overcurrent protection and overdischarge protection of the rechargeable battery; otherwise, if the oscillator control circuit does not detect that the short circuit occurs after the rechargeable battery is loaded, does not detect that the discharge current is larger than the set value (overcurrent), and does not detect that the voltage of the rechargeable battery is lower than the set value by 2.7V (overdischarge), a second protection signal is output to enable the protection switch to be conducted, and the operation is normal.
The integrated IC provided in this embodiment further includes a driving circuit, and the driving circuit is connected between the oscillator control circuit and the protection switch, and is configured to drive the protection switch to be turned on or off.
When the driving circuit receives the first protection signal, outputting a first preset level signal to a control electrode of the protection switch to enable the protection switch to be switched off; when the driving circuit receives the second protection signal, a second preset level signal is output to the control electrode of the protection switch, so that the protection switch is turned off. For example, when the first preset level signal is a high level signal, the second preset level signal is a low level signal; when the first preset level signal is a low level signal, the second preset level signal is a high level signal.
In this embodiment, the protection switch includes a first pole, a second pole, and a control pole, the first pole of the protection switch is connected to the fifth pin BAT-, the second pole of the protection switch is connected to the sixth pin GND, the control pole of the protection switch is connected to the driving circuit, and the control pole is configured to receive the first preset level signal or the second preset level signal. In this embodiment, the protection switch is an MOS transistor, wherein the first pole may be a drain or a source of the MOS transistor, the corresponding second pole may be a source or a drain of the MOS transistor, and the control pole is a gate of the MOS transistor.
In an embodiment, the charge control circuit is further configured to detect a charge temperature of the rechargeable battery, and output a third control signal to the charge control switch according to the charge temperature, wherein the third control signal is configured to reduce a magnitude of a charge current between the first pin VDD and the third pin BAT +;
the charging circuit is further configured to detect a charging current of the rechargeable battery, and output a fourth control signal to the charging control switch according to the charging current, where the fourth control signal is used to control a magnitude of the charging current between the first pin VDD and the third pin BAT +.
Wherein, still include on the PCB: a first comparator U1, a second comparator U2, a third comparator U3, and a fourth comparator U4.
The positive phase input end of the first comparator U1 is connected to the second voltage supply terminal VCC, the negative phase input end of the first comparator U1 is connected to the first reference voltage supply terminal Vovp, and the output end of the first comparator U1 is connected to the pin a of the charge control circuit.
The positive phase input end of the second comparator U2 is connected to the seventh pin RPR, one end of the first resistor R1 and the constant current source, the other end of the first resistor R1 is connected to ground, the negative phase input end of the second comparator U2 is connected to the second reference voltage supply terminal Vref1, and the output end of the second comparator U2 is connected to the B pin of the charging control circuit.
The positive phase input end of the third comparator U3 is connected to the output end of a temperature sensor, wherein the temperature sensor is used for detecting the charging temperature and outputting a voltage corresponding to the charging temperature, the negative phase input end of the third comparator U3 is connected to the third reference voltage supply end Tdie, and the output end of the third comparator is connected to the pin C of the charging control circuit.
A non-inverting input terminal of the fourth comparator U4 is connected to the third pin BAT +, a negative input terminal of the fourth comparator U4 is connected to the fourth reference voltage supply terminal Vtrikl, and an output terminal of the fourth comparator U4 is connected to the D pin of the charge control circuit.
In conclusion, the charging control circuit can also realize the control of the charging temperature and the charging current, and when the charging temperature is higher than the preset charging temperature, the charging current is controlled to be reduced, so that the temperature is reduced; detecting the voltage on a seventh pin RPR, and controlling the magnitude of the charging current through a constant current source of 1 uA; and meanwhile, the charging is controlled to realize the functions of trickle charging, constant-current charging and constant-voltage charging, when the voltage of the rechargeable battery is detected to be 2.7V-3.0V, the trickle charging function mode is entered, when the voltage of the rechargeable battery is detected to be 3.0V-4.0V, the constant-current charging function is entered, and when the voltage of the rechargeable battery is detected to be 4.0V-4.2V, the constant-voltage charging function is entered, and the OV charging function of the battery is controlled.
In one embodiment, the PCB further comprises: a fifth comparator U5, a sixth comparator U6, a seventh comparator U7, and an eighth comparator U8.
The positive phase input end of the fifth comparator U5 is connected with the positive phase input end of the sixth comparator U6 and the positive phase input end of the seventh comparator U7, and the positive phase input end of the fifth comparator U5 is also connected with the overcurrent and short-circuit protection voltage detection end VM of the rechargeable battery; the negative phase input terminal of the fifth comparator U5 is connected to the first excessive current blocking threshold voltage supply terminal Viov1, the negative phase input terminal of the sixth comparator U6 is connected to the second excessive current blocking threshold voltage supply terminal Viov2, the negative phase input terminal of the seventh comparator U7 is connected to the load short circuit blocking threshold voltage supply terminal Vshort, and the output terminal of the fifth comparator U5, the output terminal of the sixth comparator U6, and the output terminal of the seventh comparator U7 are connected to the oscillator control circuit.
The fifth comparator U5, the sixth comparator U6 and the seventh comparator U7 realize overcurrent and short-circuit protection connection of the circuit by detecting the voltage of the overcurrent and short-circuit protection voltage detection end VM of the rechargeable battery. In this embodiment, the voltage provided by the first over-current blocking threshold voltage providing terminal Viov1 is 0.15V, the voltage provided by the second over-current blocking threshold voltage providing terminal Viov2 is 0.5V, and the voltage provided by the load short circuit blocking threshold voltage providing terminal Vshort is 1.2V.
The eighth comparator U8 is used to manage the over-discharge voltage of the rechargeable battery, where Vdl is the over-discharge blocking threshold voltage, and the non-inverting input terminal of the eighth comparator U8 inputs the voltage of the rechargeable battery.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an emergency light circuit according to an embodiment, where the emergency light circuit includes: current limiting module 102, filtering module 103, charging current resistor 104, integrated IC 105, rechargeable battery 106, and emergency light module 107.
The current limiting module 102 is connected to the utility power input terminal 101, and is configured to limit a current of a current signal output from the utility power input terminal 101. The current limiting module in this embodiment is a safety resistor F.
The filtering module 103 is connected to the current limiting module 102, and configured to filter the voltage signal output by the current limiting module 102, and output the filtered dc voltage signal to a fourth pin VinL of the integrated IC 105.
The charging current resistor 104(R4) is connected between ground and the seventh pin RPR of the integrated IC 105.
The sixth pin GND of the IC 105 is connected to ground, the third pin BAT + of the IC is connected to the positive electrode of the rechargeable battery 106, the fifth pin BAT-of the IC is connected to the negative electrode of the rechargeable battery, the second pin VLED of the IC is connected to the input terminal of the emergency light module 107, and the first pin VDD of the IC is connected to the first voltage supply terminal.
The emergency light module 107 comprises a resistor R5 and an LED lamp, the second pin VLED of the integrated IC being connected to the anode of the LED lamp via a resistor R5, and the cathode of the LED lamp being connected to ground.
In this embodiment, the first pin VDD of the IC provides a stable 5V dc power, the charging switch charges the rechargeable battery (lithium battery) connected to the third pin BAT +, the magnitude of the charging current can be set through the resistor R4, the charging control circuit inside the IC detects the battery voltage in real time, when the rechargeable battery is detected to be at 2.7V, the charging mode enters a trickle charging mode, the charging current is set to be 1/10, after the voltage of the rechargeable battery is charged to 3.0V, the constant current charging mode enters a constant current charging mode, the charging current is set to be the charging current, when the voltage of the rechargeable battery is detected to be 4.0V, the constant voltage charging mode enters, the current rises slowly with the battery voltage, and the current drops slowly. When the voltage of the rechargeable battery is detected to be charged to 4.2V, the charging control circuit controls the charging switch to be switched off, and charging is stopped. When the charging control circuit detects that the voltage of the rechargeable battery is lower than 4.0V, the charging switch is controlled to be closed, the charging function is recovered, and the rechargeable battery can be continuously charged.
In addition, when the commercial power is input to the commercial power input end 101, the commercial power passes through the safety resistor F and then enters the fourth pin VinL of the integrated IC through the filtering module 103, after the alternating current detection circuit inside the integrated IC detects that the commercial power is available at the fourth pin VinL, the LED control switch is controlled to be switched off, the emergency state is not entered, the second pin VLED of the integrated IC does not output at this time, and the LED lamp in the emergency lamp module 107 is not turned on. When the utility power is not input to the utility power input end 101, the utility power can not pass through the safety resistor F and enter the fourth pin VinL of the integrated IC, after the alternating current detection circuit inside the integrated IC detects that the fourth pin VinL does not have the utility power, the LED control switch is closed and enters an emergency state, the rechargeable battery is output from the second pin VLED through the LED control switch via the third pin BAT + of the integrated IC, and the LED lamp is turned on after the emergency current required by the user is adjusted through the resistor R5 in the emergency lamp module 107, and the rechargeable battery enters the emergency state. When the rechargeable battery discharges to 2.7V, the control circuit of the oscillator in the integrated IC controls the driving circuit to output a high level after detecting that the voltage of the rechargeable battery is lower than 2.7V, the protection switch is controlled to be turned off, at the moment, the loop between the fifth pin BAT of the integrated IC and the ground is disconnected, the rechargeable battery cannot discharge outwards any more, and the emergency stop is realized. When the voltage of the rechargeable battery is higher than 3.0V, the protection switch is controlled to be conducted again, and the rechargeable battery can be discharged again.
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (7)
1. An integrated IC for an emergency lamp, comprising: integrated IC plate body, integrated IC plate body's border all around is provided with a plurality of pins, and is a plurality of the pin includes: a first pin (VDD) used for connecting a first voltage supply end, a second pin (VLED) used for connecting an emergency lamp, a third pin (BAT +) used for connecting the anode of a rechargeable battery of the emergency lamp, a fourth pin (VinL) used for connecting a mains supply, a fifth pin (BAT-) used for connecting the cathode of the rechargeable battery of the emergency lamp, a sixth pin (GND) used for connecting the ground and a seventh pin (RPR) used for connecting a constant current source;
the inside of integrated IC plate body be provided with a plurality of the PCB board that the pin is connected, include on the PCB board:
the charging control circuit is used for detecting the charging voltage of the rechargeable battery and outputting a first control signal or a second control signal according to the charging voltage;
a charge control switch connected between the first pin (VDD) and the third pin (BAT +), the charge control switch being turned off in response to a first control signal to disconnect the first pin (VDD) and the third pin (BAT +); the charge control switch is also turned on in response to a second control signal to connect the first pin (VDD) and the third pin (BAT +);
the alternating current detection circuit is connected to the fourth pin (VinL) and is used for detecting whether commercial power is input or not through the fourth pin (VinL), detecting the magnitude relation between the impedance value between the fourth pin (VinL) and the sixth pin (GND) and the trigger impedance value, and outputting a first LED control signal or a second LED control signal according to the detection result;
an LED control switch connected between the second pin (VLED) and the third pin (BAT +), the LED control switch being turned on in response to the first LED control signal to connect the third pin (BAT +) and the second pin (VLED); the LED control switch is turned off in response to a second LED control signal to disconnect the third pin (BAT +) and the second pin (VLED);
the oscillator control circuit is used for detecting the discharge current of the rechargeable battery and outputting a first protection signal or a second protection signal according to the discharge current;
a protection switch connected between the fifth pin (BAT-) and the sixth pin (GND), the protection switch being configured to turn off in response to a first protection signal to disconnect the fifth pin (BAT-) and the sixth pin (GND); the protection switch is turned on in response to a second protection signal to connect the fifth pin (BAT-) and the sixth pin (GND).
2. The integrated IC for an emergency lamp of claim 1, wherein the detection circuit is to:
when the commercial power input is detected through the fourth pin (VinL), and the impedance value between the fourth pin (VinL) and the sixth pin (GND) is larger than the trigger impedance value, outputting a second LED control signal;
when the commercial power input is detected through the fourth pin (VinL), and the impedance value between the fourth pin (VinL) and the sixth pin (GND) is smaller than or equal to the trigger impedance value, outputting a second LED control signal;
when no mains supply input is detected through the fourth pin (VinL), and the impedance value between the fourth pin (VinL) and the sixth pin (GND) is larger than the trigger impedance value, outputting a second LED control signal;
and when no mains supply input is detected through the fourth pin (VinL) and the impedance value between the fourth pin (VinL) and the sixth pin (GND) is smaller than or equal to the trigger impedance value, outputting a first LED control signal.
3. The integrated IC for an emergency lamp according to claim 1, wherein the charge control circuit is further configured to detect a charge temperature of the rechargeable battery and output a third control signal to the charge control switch according to the charge temperature, the third control signal being configured to reduce a magnitude of a charge current between the first pin (VDD) and the third pin (BAT +);
the charging control circuit is further used for detecting the charging current of the rechargeable battery and outputting a fourth control signal to the charging control switch according to the charging current, and the fourth control signal is used for controlling the magnitude of the charging current between the first pin (VDD) and the third pin (BAT +).
4. The integrated IC for an emergency light of claim 3, further comprising on the PCB:
a positive phase input end of the first comparator is connected with a second voltage supply end (VCC), a negative phase input end of the first comparator is connected with a first reference voltage supply end (Vovp), and an output end of the first comparator is connected with an A pin of the charging control circuit;
a positive phase input end of the second comparator is connected with the seventh pin (RPR), one end of a first resistor (R1) and a constant current source, the other end of the first resistor (R1) is connected with the ground, a negative phase input end of the second comparator is connected with a second reference voltage providing end (Vref1), and an output end of the second comparator is connected with a pin B of the charging control circuit;
a positive phase input end of the third comparator is connected with an output end of a temperature sensor, the temperature sensor is used for outputting a voltage corresponding to the charging temperature, a negative phase input end of the third comparator is connected with a third reference voltage supply end (Tdie), and an output end of the third comparator is connected with a pin C of the charging control circuit;
and a positive phase input end of the fourth comparator is connected with the third pin (BAT +), a negative phase input end of the fourth comparator is connected with a fourth reference voltage supply end (Vtrikl), and an output end of the fourth comparator is connected with the D pin of the charging control circuit.
5. The integrated IC for an emergency light of claim 1, further comprising on the PCB: a fifth comparator, a sixth comparator, a seventh comparator;
the positive phase input end of the fifth comparator is connected with the positive phase input end of the sixth comparator and the positive phase input end of the seventh comparator, and the positive phase input end of the fifth comparator is also connected with an overcurrent and short-circuit protection voltage detection end (VM) of the rechargeable battery; the negative phase input end of the fifth comparator is connected with a first overcurrent latching threshold voltage supply end (Viov1), the negative phase input end of the sixth comparator is connected with a second overcurrent latching threshold voltage supply end (Viov2), the negative phase input end of the seventh comparator is connected with a load short circuit latching threshold voltage supply end (Vshort), and the output end of the fifth comparator, the output end of the sixth comparator and the output end of the seventh comparator are connected with the oscillator control circuit.
6. The integrated IC for an emergency lamp according to claim 1, further comprising a driving circuit connected between the oscillator control circuit and the protection switch for driving the protection switch to be turned on or off.
7. An emergency lamp circuit, comprising: a current limiting module, a filtering module, a charging current resistor, an integrated IC according to any one of claims 1-6, a rechargeable battery and an emergency light module;
the current limiting module is connected with the mains supply input end and is used for limiting the current of a current signal output by the mains supply input end;
the filtering module is connected with the current limiting module and used for filtering the voltage signal output by the current limiting module and outputting the filtered voltage signal to a fourth pin (VinL) of the integrated IC;
the charging current resistor is connected between the ground and a seventh pin (RPR) of the integrated IC;
the sixth pin (GND) of the integrated IC is connected with the ground, the third pin (BAT +) of the integrated IC is connected with the positive electrode of the rechargeable battery, the fifth pin (BAT-) of the integrated IC is connected with the negative electrode of the rechargeable battery, the second pin (VLED) of the integrated IC is connected with the input end of the emergency lamp module, and the first pin (VDD) of the integrated IC is connected with the first voltage supply end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120604432.9U CN215073068U (en) | 2021-03-24 | 2021-03-24 | Emergency lamp circuit and integrated IC for emergency lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120604432.9U CN215073068U (en) | 2021-03-24 | 2021-03-24 | Emergency lamp circuit and integrated IC for emergency lamp |
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| Publication Number | Publication Date |
|---|---|
| CN215073068U true CN215073068U (en) | 2021-12-07 |
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| CN202120604432.9U Active CN215073068U (en) | 2021-03-24 | 2021-03-24 | Emergency lamp circuit and integrated IC for emergency lamp |
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| CN (1) | CN215073068U (en) |
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