CN-224233874-U - Lamp turning circuit for realizing PSR mode and rechargeable battery device

CN224233874UCN 224233874 UCN224233874 UCN 224233874UCN-224233874-U

Abstract

The utility model discloses a light turning circuit for realizing a PSR mode and a rechargeable battery device, wherein the light turning circuit comprises a control unit, a power tube, a transformer unit, a transconductance amplifying unit, a comparator, an inverter, a green light control unit and a red light control unit, wherein the control unit is electrically connected with the power tube, the power tube is connected with a primary winding of the transformer unit, a secondary winding of the transformer unit is connected with a charging end, the primary winding of the transformer unit is electrically connected with an input end of the transconductance amplifying unit, an output end of the transconductance amplifying unit is electrically connected with an input end of the comparator, an output end of the comparator is respectively electrically connected with an input end of the inverter and the green light control unit, and an output end of the inverter is electrically connected with the red light control unit. The technical scheme of the utility model can reduce the number of circuit elements, reduce the occupied area of the PCB, adapt to the miniaturized design requirement, and simultaneously have the advantages of convenient debugging, improving the efficiency of the whole circuit and reducing the cost.

Inventors

YANG CHUAN

Assignees

深圳市群芯科创电子有限公司

Dates

Publication Date: 20260512
Application Date: 20250407

Claims (10)

1. The lamp turning circuit for realizing the PSR mode is characterized by comprising a control unit, a power tube, a transformer unit, a transconductance amplifying unit, a comparator, an inverter, a green light control unit and a red light control unit, wherein the control unit is used for controlling the power tube to turn the lamp; the control unit is electrically connected with the power tube, the power tube is connected with a primary winding of the transformer unit, a secondary winding of the transformer unit is connected with a charging end, the primary winding of the transformer unit is electrically connected with an input end of the transconductance amplifying unit, an output end of the transconductance amplifying unit is electrically connected with an input end of the comparator, an output end of the comparator is respectively and electrically connected with an input end of the inverter and the green light control unit, and an output end of the inverter is electrically connected with the red light control unit; The output voltage of the transconductance amplifying unit is inversely proportional to the charging current of the secondary winding of the transformer unit, when the rechargeable battery at the charging end is in a normal charging state, the output voltage of the transconductance amplifying unit is smaller, the red lamp control unit lights the red lamp, and when the rechargeable battery at the charging end is in a saturated charging state, the output voltage of the transconductance amplifying unit is larger, and the green lamp control unit lights the green lamp.
2. The lamp switching circuit for realizing the PSR mode according to claim 1, wherein the power tube is an NPN triode, a base electrode of the NPN triode is connected with an output end of the control unit, a collector electrode is connected with a voltage, and an emitter electrode is connected with a primary winding of the transformer unit.
3. The turn light circuit for implementing the PSR mode of claim 1, wherein the transformer unit includes a primary winding, a first primary resistor, a second primary resistor, a secondary winding, and a load; One end of the primary winding is connected with the power tube, the other end of the primary winding is grounded, the first primary resistor and the second primary resistor are connected in series, the first primary resistor and the second primary resistor after being connected in series are connected with the primary winding in parallel, and the load is connected with the secondary winding in parallel.
4. The lamp switching circuit for realizing PSR mode according to claim 3, wherein said transconductance amplifier unit comprises a transconductance amplifier, a first resistor, a second resistor and a third resistor, said transconductance amplifier has a positive input terminal, a negative input terminal and an output terminal, said positive input terminal is connected to a common junction of said first primary resistor and said second primary resistor, said negative input terminal is connected to a reference voltage through the first resistor, said first resistor is connected to said output terminal through the second resistor, said output terminal is connected to said comparator through the third resistor, and said output terminal is further connected to an input terminal of said control unit.
5. The lamp switching circuit for realizing the PSR mode according to claim 4, wherein the transconductance amplifier comprises third to tenth P-type MOS transistors and first to fifth N-type MOS transistors, wherein a gate of the third P-type MOS transistor is connected with a control voltage, a source of the third P-type MOS transistor is connected with a pre-fabricated voltage, and a drain of the third P-type MOS transistor is connected with a common contact point of source connection of the fourth P-type MOS transistor and a source connection of the fifth P-type MOS transistor; the grid electrode of the fourth P-type MOS tube is connected with the negative end of the input voltage, the drain electrode of the fourth P-type MOS tube is connected with a common contact point of the drain electrode of the second N-type MOS tube and the source electrode of the fourth N-type MOS tube; the grid electrode of the fifth P type MOS tube is connected with the positive end of the input voltage, the drain electrode of the fifth P type MOS tube is connected with a public joint of the source electrode of the fifth N type MOS tube, the source electrode of the sixth P type MOS tube is connected with the prefabricated voltage, the drain electrode of the sixth P type MOS tube is connected with the drain electrode of the first N type MOS tube, the grid electrode of the ninth P type MOS tube is connected with the public joint of the grid electrode of the tenth P type MOS tube, the seventh P type MOS tube is arranged in cascade connection with the ninth P type MOS tube, the eighth P type MOS tube is arranged in cascade connection with the tenth P type MOS tube, the grid electrode of the seventh P type MOS tube is connected with the grid electrode of the eighth P type MOS tube, the drain electrode of the ninth P type MOS tube is connected with the drain electrode of the fourth N type MOS tube, the drain electrode of the tenth P type MOS tube is connected with the drain electrode of the fifth N type MOS tube, the fourth N type MOS tube is arranged in cascade connection with the fifth N type MOS tube, the fifth P type MOS tube is connected with the grid electrode of the fifth N type MOS tube, the fifth MOS tube is connected with the grid electrode of the fifth N type MOS tube is connected with the fifth N type MOS tube, the grid electrode is connected with the input voltage.
6. The lamp switching circuit for realizing the PSR mode according to claim 1, wherein the comparator comprises eleventh to fourteenth P-type MOS tubes and sixth to eighth N-type MOS tubes, wherein sources of the eleventh and twelfth P-type MOS tubes are connected with a preset voltage, gates of the eleventh and twelfth P-type MOS tubes are connected with an input voltage, drains of the eleventh and thirteenth P-type MOS tubes are connected with a common contact connected with sources of the fourteenth and twelfth P-type MOS tubes, drains of the twelfth and eighth P-type MOS tubes are connected with drains of the eighth N-type MOS tube, gates of the thirteenth and thirteenth P-type MOS tubes are connected with a negative end of the input voltage, drains of the fourteenth and eighth N-type MOS tubes are connected with a positive end of the input voltage, drains of the seventh N-type MOS tube are connected with gates of the seventh N-type MOS tube, gates of the eighth N-type MOS tube are connected with a common contact connected with drains of the fourteenth and seventh N-type MOS tube, and sources of the eighth N-type MOS tube are grounded.
7. The lamp switching circuit for realizing the PSR mode according to claim 1, wherein the inverter comprises a fifteenth P-type MOS tube and a ninth N-type MOS tube, the grid electrode of the fifteenth P-type MOS tube and the grid electrode of the ninth N-type MOS tube are connected with input voltages, the drain electrode of the fifteenth P-type MOS tube is connected with the drain electrode of the ninth N-type MOS tube, the source electrode of the fifteenth P-type MOS tube is connected with the prefabricated voltage, and the source electrode of the ninth N-type MOS tube is grounded.
8. The light turning circuit for realizing the PSR mode according to claim 1, wherein the green light control unit comprises a second P-type MOS (metal oxide semiconductor) tube and a green light diode, the red light control unit comprises a first P-type MOS tube and a red light diode, the drain electrode of the first P-type MOS tube and the drain electrode of the second P-type MOS tube are both connected with a preset voltage, the grid electrode of the first P-type MOS tube is connected with the output end of the inverter, the source electrode is connected with the positive end of the red light diode, the negative end of the red light diode is grounded, the grid electrode of the second P-type MOS tube is connected with a common contact point which is connected with the input end of the inverter and the output end of the comparator, the source electrode is connected with the positive end of the green light diode, and the negative end of the green light diode is grounded.
9. The lamp switching circuit for realizing the PSR mode according to claim 1, wherein the control unit is an AC-DC control unit, the control unit works in the PSR mode, the output end of the control unit controls the conducting frequency and the output current of the power tube, and the input end of the control unit receives the output signal of the transconductance amplifying unit and controls the output current of the power tube according to the magnitude of the output signal.
10. A rechargeable battery device, characterized in that it comprises a turn light circuit implementing a PSR mode according to any one of claims 1 to 9.

Description

Lamp turning circuit for realizing PSR mode and rechargeable battery device Technical Field The utility model relates to the field of switching power supply conversion, in particular to a lamp switching circuit for realizing a PSR mode and a rechargeable battery device. Background With the development of portable electronic devices, rechargeable batteries are increasingly used, and lithium batteries and lead-acid batteries are also increasingly used. The lithium battery and the lead-acid battery are provided with the charging module, so that a user can simply and clearly see whether the electric quantity in the charging module is full or not, a lamp turning module is usually arranged, the lamp turning module needs to sample and output charging current, and the LM358 is used for making a high-gain closed loop to amplify and then comparing with a TL431 reference, so that the lamp turning module is controlled to work. However, the above-mentioned light conversion module requires additional circuit elements of LM358 and TL431, resulting in a larger size of PCB, which is difficult to meet the miniaturization design requirement, and the whole circuit cost is very high due to the introduction of a plurality of circuit elements, and a high-power sampling resistor needs to be sampled, which reduces the system efficiency. In view of this, there is a need for further improvements in the circuit structure of current turn-light circuits. Disclosure of utility model In order to solve at least one of the above problems, a primary objective of the present utility model is to provide a turn light circuit and a rechargeable battery device for implementing a PSR mode. In order to achieve the aim, the utility model adopts a technical scheme that a lamp switching circuit for realizing a PSR mode is provided, and comprises a control unit, a power tube, a transformer unit, a transconductance amplifying unit, a comparator, an inverter, a green lamp control unit and a red lamp control unit; the control unit is electrically connected with the power tube, the power tube is connected with a primary winding of the transformer unit, a secondary winding of the transformer unit is connected with a charging end, the primary winding of the transformer unit is electrically connected with an input end of the transconductance amplifying unit, an output end of the transconductance amplifying unit is electrically connected with an input end of the comparator, an output end of the comparator is respectively and electrically connected with an input end of the inverter and the green light control unit, and an output end of the inverter is electrically connected with the red light control unit; The output voltage of the transconductance amplifying unit is inversely proportional to the charging current of the secondary winding of the transformer unit, when the rechargeable battery at the charging end is in a normal charging state, the output voltage of the transconductance amplifying unit is smaller, the red lamp control unit lights the red lamp, and when the rechargeable battery at the charging end is in a saturated charging state, the output voltage of the transconductance amplifying unit is larger, and the green lamp control unit lights the green lamp. The power tube is an NPN triode, the base electrode of the NPN triode is connected with the output end of the control unit, the collector electrode is connected with the voltage of the connecting wire, and the emitter electrode is connected with the primary winding of the transformer unit. The transformer unit comprises a primary winding, a first primary resistor, a second primary resistor, a secondary winding and a load; One end of the primary winding is connected with the power tube, the other end of the primary winding is grounded, the first primary resistor and the second primary resistor are connected in series, the first primary resistor and the second primary resistor after being connected in series are connected with the primary winding in parallel, and the load is connected with the secondary winding in parallel. The transconductance amplifier comprises a transconductance amplifier, a first resistor, a second resistor and a third resistor, wherein the transconductance amplifier is provided with a positive input end, a negative input end and an output end, the positive input end is connected with a common contact of the first primary resistor and the second primary resistor, the negative input end is connected with a reference voltage through the first resistor, the first resistor is connected with the output end through the second resistor, the output end is connected with the comparator through the third resistor, and the output end is further connected with the input end of the control unit. The transconductance amplifier comprises third to tenth P-type MOS tubes and first to fifth N-type MOS tubes, wherein the grid electrode of the third P-type MOS tube is connected with control voltage,