CN108631619B - Adapter control circuit and adapter - Google Patents

Adapter control circuit and adapter Download PDF

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CN108631619B
CN108631619B CN201810456760.1A CN201810456760A CN108631619B CN 108631619 B CN108631619 B CN 108631619B CN 201810456760 A CN201810456760 A CN 201810456760A CN 108631619 B CN108631619 B CN 108631619B
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module
compensation
transformer
voltage
output
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CN108631619A (en
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不公告发明人
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Suzhou Shuixin Electronic Technology Co ltd
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Shenzhen Quanbaokuan Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02J7/045—

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention provides an adapter control circuit, which is used for converting commercial power into a voltage signal suitable for charging electronic equipment, and comprises an input module, a transformer, an output module, a PWM module, a switch module and a dynamic loop compensation module, wherein the input module is connected to the output module through the transformer, the dynamic loop compensation module, the PWM module, the switch module and the transformer are sequentially connected, the output voltage of the output module is V0, the output current signal is I0, the adapter control circuit sets a reference voltage Vref, Vk is V0-Vref, the dynamic loop compensation module controls the PWM module according to Vk and transformer current or Vk and output current I0, and the PWM module controls the on-off of the transformer through the switch module to adjust the output voltage V0. The invention also provides an adapter comprising the adapter control circuit. The adapter control circuit and the adapter provided by the invention can stably output under different output current and output voltage conditions.

Description

Adapter control circuit and adapter
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of electronic equipment charging, in particular to an adapter control circuit and an adapter.
[ background of the invention ]
An adapter is an electronic accessory, which is widely used in the field of electronic device charging. Taking charging the mobile phone through the mobile phone adapter as an example, when charging, one end of the adapter is connected with the mains supply, the other end of the adapter is connected with the electronic device through a wire, the mobile phone is equivalent to the load of the adapter, and the mains supply outputs a set voltage and/or current signal after being subjected to voltage reduction, filtering and the like through the adapter so as to charge the electronic device. When the existing adapter is used for charging hands of different models, the problem that output voltage and/or current signals are unstable easily exists due to different charging voltages and currents corresponding to mobile phones of different models.
[ summary of the invention ]
In order to overcome the problems of the existing adapter, the invention provides an adapter control circuit and an adapter.
The invention provides an adapter control circuit, which is used for converting commercial power into a voltage signal suitable for charging electronic equipment, and comprises an input module, a transformer, an output module, a PWM module, a switch module and a dynamic loop compensation module, wherein the input module is connected to the output module through the transformer, the dynamic loop compensation module, the PWM module, the switch module and the transformer are sequentially connected, the output voltage of the output module is V0, the output current signal is I0, the adapter control circuit sets a reference voltage Vref, Vk is V0-Vref, the dynamic loop compensation module controls the PWM module according to Vk and transformer current or Vk and output current I0, and the PWM module controls the on-off of the transformer through the switch module to adjust the output voltage V0;
the adapter control circuit further comprises a voltage compensation module, a transformer current acquisition module, a voltage acquisition module, a first ADC module and a second ADC module, wherein the transformer current acquisition module is connected to the dynamic loop compensation module through the first ADC module, the voltage acquisition module is connected to the dynamic loop compensation module through the second ADC module, the transformer current acquisition module is connected with a transformer and is used for acquiring transformer current, the voltage compensation module is connected with the voltage acquisition module, Vk is generated after compensation processing is carried out on the Vk through the voltage compensation module, the first ADC module and the second ADC module respectively carry out digital processing on the transformer current and Vk ', the dynamic loop compensation module carries out compensation calculation on the digital processed Vk ' and the transformer current and then outputs compensation signals, and the dynamic loop compensation module changes a compensation algorithm according to different digital processed Vk ' and transformer current, the compensation signal controls the PWM module, and the PWM module controls the on-off of the transformer through the switch module to adjust the output voltage V0;
or, the adapter control circuit further comprises a voltage compensation module, a transformer current collection module, a voltage collection module, a first multi-path comparator and a second multi-path comparator, the transformer current collection module is connected to the dynamic loop compensation module through the first multi-path comparator, the voltage collection module is connected to the dynamic loop compensation module through the second multi-path comparator, the transformer current collection module is connected with the transformer and used for collecting transformer current, the voltage compensation module is connected with the voltage collection module, Vk is compensated and processed through the voltage compensation module to generate Vk ', the first multi-path comparator and the second multi-path comparator respectively compare and process transformer current and Vk' and output comparison signals, the dynamic loop compensation module carries out compensation calculation according to the received comparison signals and outputs compensation signals, and the dynamic loop compensation module changes the compensation algorithm according to different comparison signals, the compensation signal controls a PWM module, and the PWM module controls the output of the transformer through a switch module to adjust the output voltage V0;
alternatively, the adapter control circuit further comprises a first ADC module, a second ADC module, the control module is connected with the PWM module, Vk is input to the input end of the first ADC module, output current I0 is input to the input end of the second ADC module, the DAC module, the first ADC module and the second ADC module are all connected with the dynamic loop compensation module, the first ADC module and the second ADC module respectively carry out digital processing on Vk and output current I0, the dynamic loop compensation module carries out compensation calculation on the Vk and output current I0 which are subjected to digital processing and then outputs compensation signals, the dynamic loop compensation module changes a compensation algorithm according to different Vk and output current I0 which are subjected to digital processing, the compensation signals generate analog compensation signals through the DAC module, the control module controls the PWM module according to the analog compensation signals, and the PWM module controls the on-off of a transformer through the switch module to adjust output voltage V0;
or, the adapter control circuit further includes a first multi-path comparator, a second multi-path comparator and a control module connected with the PWM module, Vk is input to an input end of the first multi-path comparator, output current I0 is input to an input end of the second multi-path comparator, the first multi-path comparator and the second multi-path comparator are both connected with the dynamic loop compensation module, the first multi-path comparator and the second multi-path comparator respectively compare Vk with output current I0 and output a comparison signal, the dynamic loop compensation module performs compensation calculation according to the received comparison signal and outputs a compensation signal, the dynamic loop compensation module changes a compensation algorithm according to different comparison signals, the control module controls the PWM module according to the compensation signal, and the PWM module controls the transformer to be switched on and off through the switch module to adjust output voltage V0.
Preferably, the voltage acquisition module acquires the Vk' signal through an optocoupler or a magnetic coupler.
Preferably, the voltage acquisition module comprises an optical coupler output unit Ub, one end of the optical coupler output unit Ub is connected with the dynamic loop compensation module, and the other end of the optical coupler output unit Ub is grounded; the adapter control circuit is provided with an operation circuit for calculating Vk, and the operation circuit and the voltage compensation circuit are configured as follows: the voltage stabilizing circuit comprises a resistor R1 and a resistor R2 which are connected in series, wherein the first end of the resistor R1 is connected to an output module, the second end of the resistor R1 and the first end of the resistor R2 are both connected to a node A, the second end of the resistor R2 is grounded, the voltage stabilizing circuit further comprises a resistor R5, an optical coupling input unit Ua and a voltage stabilizing source TL431, the first end of the resistor R5 is connected to the output module, the optical coupling input unit Ua is connected between the second end of the resistor R5 and the cathode of the voltage stabilizing source TL431, a node B is formed between the optical coupling input unit Ua and the voltage stabilizing source TL431, the anode of the voltage stabilizing source TL431 is grounded, the reference electrode is connected to the; the output voltage V0 and a voltage stabilizing source TL431 set Vref are subjected to subtraction operation to obtain Vk, the Vk further comprises a resistor R3 and a capacitor C1, the resistor R3 and the capacitor C1 are connected between nodes A and B in series and used for compensating the Vk, the Vk is compensated through a resistor R3 and a capacitor C1 to generate Vk ', and the Vk' is coupled to an optical coupler output unit Ub through an optical coupler input unit Ua.
Preferably, the switch module comprises a MOS transistor Q1, a gate of the MOS transistor Q1 is connected to the PWM module, a drain of the MOS transistor Q1 is connected to the front end of the transformer, a capacitor C0 is connected between a source and a drain of the MOS transistor Q1, a source of the MOS transistor Q1 is grounded through a resistor R0, and the transformer current collection module is connected to the source of the MOS transistor Q1 to collect the transformer current.
Preferably, the dynamic loop compensation module provides different compensation algorithms according to the voltage interval to which Vk belongs and the current interval to which the transformer current or the output current I0 belongs.
The invention also provides an adapter comprising an adapter control circuit as claimed in the preceding claims.
Compared with the prior art, the adapter control circuit and the adapter provided by the invention are provided with the dynamic loop compensation module, the dynamic loop compensation module controls the PWM module according to Vk and the transformer current or Vk and the output current I0, and the PWM module controls the output of the transformer through the switch module to adjust the output voltage V0. The adapter control circuit and the adapter provided by the invention can be suitable for different electronic equipment and have the advantage of good output stability.
[ description of the drawings ]
Fig. 1 is a schematic circuit block diagram of an adapter control circuit according to a first embodiment of the present invention.
Fig. 2A is a schematic circuit diagram of a transformer and a switch module in the adapter control circuit according to the first embodiment of the present invention.
Fig. 2B is a schematic circuit diagram of a voltage acquisition module in the adapter control circuit according to the first embodiment of the present invention.
FIG. 2C is a diagram of an operation module in the adapter control circuit according to the first embodiment of the present invention.
Fig. 3 is a schematic circuit block diagram of an adapter control circuit according to a second embodiment of the present invention.
Fig. 4 is a schematic circuit block diagram of an adapter control circuit according to a third embodiment of the present invention.
Fig. 5 is a schematic circuit block diagram of an adapter control circuit according to a fourth embodiment of the present invention.
Description of reference numerals:
first embodiment reference numerals: 11. an input module; 12. a transformer; 12a, the front end of the transformer; 12b, the rear end of the transformer; 13. an output module; 14. a switch module; 15. a PWM module; 16. a dynamic loop compensation module; 17a, a first ADC module; 17b, a second ADC module; 18a, a transformer current acquisition module; 18b, a voltage acquisition module; 19. an operation module; 19a, a voltage compensation module;
second embodiment reference numerals: 21. an input module; 22. a transformer; 23. an output module; 24. a switch module; 25. a PWM module; 26. a dynamic loop compensation module; 27a, a first multi-way comparator; 27b, a first multi-way comparator; 28a, a transformer current acquisition module; 28b, a voltage acquisition module; 29. an operation module; 29a, a voltage compensation module;
third embodiment reference numerals: 31. an input module; 32. a transformer; 33. an output module; 34. a switch module; 35. a PWM module; 311. a control module; 36. a dynamic loop compensation module; 37a, a first ADC module; 37b, a second ADC module; 38. a DAC module; 39. an operation module;
fourth embodiment reference numerals: 41. an input module; 42. a transformer; 43. an output module; 44. a switch module; 45. a PWM module; 411. a control module; 46. a dynamic loop compensation module; 47a, a first ADC module; 47b, a second ADC module; 49. and an operation module.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The "electrical connection" between two modules or components in the present invention includes physical connection between the two modules or components through wires, and also includes electrical coupling (optical coupling or magnetic coupling, etc.) between the two modules or components through the input end and the output end of the coupler. Referring to fig. 1, a first embodiment of the present invention provides an adapter control circuit 10 for converting a commercial power into a voltage signal suitable for charging an electronic device. The adapter control circuit 10 includes an input module 11, a transformer 12, an output module 13, a switch module 14, a PWM module 15, a dynamic loop compensation module 16, a first ADC module 17a, a second ADC module 17b, a transformer current collection module 18a, a voltage collection module 18b, a voltage compensation module 19a, and an operation module 19, wherein the transformer 12 is connected between the input module 11 and the output module 13, one end of the operation module 19 is connected to the output module 13, and the other end is electrically connected to the voltage collection module 18b through the voltage compensation module 19 a. The transformer current collection module 18a is electrically connected to the transformer 12. The transformer current collection module 18a and the voltage collection module 18b are respectively connected with the first ADC module 17a and the second ADC module 17b, the first ADC module 17a and the second ADC module 17b are both connected to the dynamic loop compensation module 16, and the PWM module 15 is connected to the dynamic loop compensation module 16 and connected to the transformer 12 through the switch module 14.
The input module 11 is connected with a mains supply, the electronic device is connected with the output module 13, and the mains supply is subjected to voltage reduction through the transformer 12 and is processed by the output module 13 to output an output voltage V0 and an output current I0. It will be appreciated that the input module 11 may include known rectifying and/or filtering modules. The output module 13 may include a filter module and the like.
As is well known, the input terminal of the transformer 12 is the front terminal of the transformer 12, and the output terminal is the back terminal. The transformer current collection module 18a is used for collecting the transformer current, that is, collecting the current at the front end of the transformer.
The operation module 19 is used for subtraction, the adapter control circuit 10 sets a reference voltage Vref, and the operation module 19 is used for calculating Vk, where Vk is V0-Vref. The voltage compensation module 19a performs compensation processing on the Vk signal to generate Vk ', the voltage acquisition module 18b is used for acquiring Vk ', the first ADC module 17a and the second ADC module 17b perform digital processing on the transformer current and Vk ' respectively, the dynamic loop compensation module 16 performs compensation calculation on the digital processed Vk ' and the transformer current to output a compensation signal, the dynamic loop compensation module 16 changes a compensation algorithm according to different digital processed Vk ' and transformer current, the compensation signal controls the PWM module 15, and the PWM module 15 controls the on-off of the transformer 12 through the switch module 14 to adjust the output voltage V0. In this way, the adapter control circuit 10 can adapt to different electronic devices by dynamically adjusting the magnitude of the output voltage V0, and the output stability of the adapter control circuit 10 is improved.
It is understood that the dynamic loop compensation module 16 mentioned in the present invention is substantially based on different current and voltage change compensation algorithms, and further, is based on different current and voltage change compensation algorithms in real time, which is different from the conventional implementation in which the compensation module uses a fixed transfer function for compensation calculation. Alternatively, the voltage compensation module 19a performs the compensation calculation using a fixed transfer function.
As a variant, the voltage compensation module 19a may be integrated in the arithmetic module 19. The connection between the voltage compensation module 19a and the voltage acquisition module 18b includes direct electrical connection therebetween, and also includes indirect electrical connection therebetween.
Referring to fig. 2A, the transformer 12 includes a transformer front end 12A and a transformer rear end 12b, as an embodiment of the switch module 14, the switch module 14 includes a MOS transistor Q1, a gate of the MOS transistor Q1 is connected to the PWM module 15, a drain of the MOS transistor Q1 is connected to the transformer front end 12A, a capacitor C0 is connected between a source and a drain of the MOS transistor Q1, a source of the MOS transistor Q1 is grounded through a resistor R0, and the transformer current collection module 18a is connected to the source of the MOS transistor Q1 to collect a transformer current. It is to be understood that the transformer current collection module 18a is not limited to collecting the transformer current through the switch module 14, but may collect the transformer current directly or by connecting to the transformer front end 12a through other circuits.
Preferably, to isolate the transformer front end 12a from the transformer back end 12b, Vk' is sent to the voltage acquisition module 18b via an optocoupler or a magnetic coupler. Referring to fig. 2B and 2C, as an embodiment, the voltage collecting module 18B includes an optical coupler output unit Ub, and one end of the optical coupler output unit Ub is connected to the second ADC module 17B, and the other end is grounded. As an embodiment, the operation module 19 and the voltage compensation module 19a circuit may be configured as follows: a resistor R1 and a resistor R2 are provided in series, a first terminal of the resistor R1 is connected to the output module 13, i.e. to the output terminal of the output voltage V0, a second terminal of the resistor R1 and a first terminal of the resistor R2 are both connected to the node a, and a second terminal of the resistor R2 is connected to ground. Further provided are a resistor R5, an optocoupler input unit Ua, a voltage regulator TL431, and a resistor R5, the first terminal of which is connected to the output module 13, i.e. to the output terminal of the output voltage V0. The optical coupler input unit Ua is connected between the second end of the resistor R5 and the cathode of the voltage stabilizing source TL431, a node B is formed between the optical coupler input unit Ua and the voltage stabilizing source TL431, the anode of the voltage stabilizing source TL431 is grounded, the reference pole is connected to the node A, and Vref is set through the voltage stabilizing source TL 431. Still further include resistance R3 and electric capacity C1 and resistance R4, resistance R3 and electric capacity C1 are connected in series between node A and B, and it is used for compensating Vk, and resistance R4 is connected in parallel with opto-coupler input unit Ua. The output voltage V0 and the voltage stabilizing source TL431 set Vref are subjected to subtraction operation to obtain Vk, the Vk is compensated through a resistor R3 and a capacitor C1 to generate Vk ', and the Vk' is coupled to an optical coupler output unit Ub through an optical coupler input unit Ua.
It will be appreciated that the optical or magnetic couplers may be replaced with other couplers. It is to be understood that the specific circuit of the operation module 19 is not limited, and may be implemented by a comparator, a differential circuit, etc.
The specific circuits of the switch module 14, the voltage acquisition module 18b, the voltage compensation module 19a and the operation module 19 disclosed in this embodiment are suitable for other embodiments, and may be adaptively adjusted according to the requirements of other embodiments.
Preferably, the transformer back end 12b, the output module 13, the voltage compensation module 19a and the operation module 19 belong to a back end circuit of the adapter control circuit 10, and the transformer front end 12a and other modules belong to a front end circuit of the adapter control circuit 10.
Referring to fig. 3, a second embodiment of the present invention provides an adapter control circuit 20, which is different from the first embodiment in that a first ADC block 17a and a second ADC block 17b are replaced with a first multiplexer 27a and a second multiplexer 27b, respectively. The working process is as follows: the input module 21 is connected with the mains supply, the electronic device is connected with the output module 23, and the mains supply outputs output voltage V0 and output current I0 through the output module 23 after being subjected to voltage reduction processing by the transformer 22. The adapter control circuit 20 is set with a reference voltage Vref, and the arithmetic block 29 calculates Vk, which is V0-Vref. The voltage compensation module 29a is configured to perform compensation processing on Vk to generate Vk ', the voltage acquisition module 28b is configured to acquire a Vk' signal, and the transformer current acquisition module 28a acquires a transformer current. The first multi-path comparator 27a performs comparison operation on the transformer current collected by the transformer current collection module 28a and outputs a comparison signal corresponding to the comparison result, the second multi-path comparator 27b performs comparison operation on Vk' collected by the voltage collection module 28b and outputs a comparison signal corresponding to the comparison result, the dynamic loop compensation module 26 performs compensation calculation according to the received comparison signal and then outputs a compensation signal, the dynamic loop compensation module 26 changes the compensation algorithm according to different comparison signals, the compensation signal controls the PWM module 25, and the PWM module 25 controls the on-off of the transformer 22 through the switch module 24 to adjust the output voltage V0.
As an example, as shown in table 1 below, the first multi-way comparator 27a may determine a current interval in which the current at the front end of the transformer 22 is located according to the comparison operation, for example, the current transformer current collected by the current transformer current collection module 28a belongs to the current interval I1-I2, or I2-I3, or I3-I4, or I4-I5. According to the different current intervals, the first multi-way comparator 27a outputs different comparison signals to the dynamic loop compensation module 26. The second multi-way comparator 27b may determine the voltage interval where the Vk 'is located according to the comparison operation, for example, the Vk' collected by the current voltage collecting module 28b belongs to the voltage range V1-V2, or V2-V3, or V3-V4, or V4-V5. The second multi-path comparator 27b outputs different comparison signals to the dynamic loop compensation module 26 according to the voltage range in which the multi-path comparator is located. The dynamic loop compensation module 26 provides different compensations Q11, Q12, Q44 according to different comparison signals. It is understood that Q11, Q12, · · Q44 may be completely different or partially identical compensation values or compensation functions, etc. Thus, the dynamic loop compensation module provides different compensation algorithms according to the voltage interval to which Vk' (Vk) belongs and the current interval to which the transformer current or the output current I0 belongs, and the dynamic loop compensation module 26 can provide appropriate charging voltage signals for different electronic devices through different compensations.
TABLE 1 dynamic Loop Compensation Module 26 Compensation rules Table
Figure GDA0002728435100000101
It is understood that the division of the voltage and current intervals disclosed above is merely illustrative and can be adjusted according to actual needs. The compensation rules disclosed in table 1 apply to other embodiments. The dynamic loop compensation module 26 compensation rules are not limited and may provide a compensation signal according to any rule.
Referring to fig. 4, a third embodiment of the present invention provides an adapter control circuit 30 for converting a commercial power into a voltage signal suitable for charging an electronic device. The adapter control circuit 30 includes an input module 31, a transformer 32, an output module 33, a switch module 34, a PWM module 35, a control module 311, an operation module 39, a first ADC module 37a, a second ADC module 37b, a dynamic loop compensation module 36 and a DAC module 38, where the transformer 32 is connected between the input module 31 and the output module 33, one end of the operation module 39 is connected to the output module 33, the other end of the operation module 39 is connected to the first ADC module 37a, the second ADC module 37b is connected to the output module 33, both the first ADC module 37a and the second ADC module 37b are connected to the dynamic loop compensation module 36, the dynamic loop compensation module 36 is electrically connected to the control module 311 through the DAC module 38, and the control module 311 is connected to the transformer 32 sequentially through the PWM module 35 and the switch module 34. As is well known, the input terminal of the transformer 32 is the front end of the transformer, and the output terminal is the back end.
The input module 31 is used for being connected with a mains supply, the electronic device is connected with the output module 33, and the mains supply outputs an output voltage V0 and an output current I0 through the output module 33 after being subjected to voltage reduction processing by the transformer 32. It is understood that a known rectifying module and/or a known filtering module may be disposed between the input module 31 and the transformer 32. A filter module or the like may be provided between the transformer 32 and the output module 33.
The operation module 39 is used for subtraction, the adapter control circuit 30 sets a reference voltage Vref, and the operation module 39 is used for calculating Vk, which is V0-Vref. The first ADC block 37a digitizes Vk, and the second ADC block 37b digitizes the output current I0 of the output block 33. The dynamic loop compensation module 36 performs compensation calculation on the digitized Vk and the output current I0 to output a compensation signal, the dynamic loop compensation module 36 changes a compensation algorithm according to different digitized Vk and output currents I0, the compensation signal is converted into an analog signal by the DAC module 38 and then transmitted to the control module 311, the control module 311 controls the PWM module 35 according to the received analog compensation signal, and the PWM module 35 controls the on-off of the transformer 32 through the switch module 34 to adjust the output voltage V0. In this way, the adapter control circuit 30 can adapt to different electronic devices by dynamically adjusting the magnitude of the output voltage V0, and the output stability of the adapter control circuit 30 is improved.
Preferably, to isolate the transformer front and back ends, the analog compensation signal output by the DAC module 38 is sent to the control module 311 through an optical coupler or a magnetic coupler. It is to be understood that the coupler is not limited to an optical coupler or a magnetic coupler, and may be replaced with other couplers.
The chip selected for the control module 311 may be OB 5269.
As a variation, the DAC module 38 and the first and second ADC modules 37a and 37b may be omitted.
Preferably, the transformer back end, the output module 33, the operation module 39, the first ADC module 37a, the second ADC module 37b, the dynamic loop compensation module 36 and the DAC module 38 belong to a back end circuit of the adapter control circuit 30, and the transformer front end and other modules belong to a front end circuit of the adapter control circuit 30.
It will be appreciated that the output current I0 can be collected by connecting a resistor to ground at the output of the output module 33, and the second ADC module 37b is connected between the resistor and the output module 33.
Referring to fig. 5, a fourth embodiment of the present invention provides an adapter control circuit 40, which is different from the third embodiment in that a first ADC module 47a and a second ADC module 47b are replaced by a first multiplexer 47a and a second multiplexer 47b, respectively, and a DAC module is omitted. The working process is as follows: the input module 41 is connected to the mains supply, the electronic device is connected to the output module 43, and the mains supply is subjected to voltage reduction processing by the transformer 42 and then outputs an output voltage V0 and an output current I0 through the output module 43. The adapter control circuit 40 is set with a reference voltage Vref, and the arithmetic block 49 calculates Vk, which is V0-Vref. The first multi-path comparator 47a performs comparison operation on Vk and outputs a comparison signal corresponding to the comparison result, the second multi-path comparator 47b performs comparison operation on the output current I0 and outputs a comparison signal corresponding to the comparison result, the dynamic loop compensation module 46 performs compensation calculation according to the received comparison signal and then outputs a compensation signal, and the dynamic loop compensation module 46 changes the compensation algorithm according to different comparison signals. The compensation signal is transmitted to the control module 411, the control module 411 controls the PWM module 45 according to the compensation signal, and the PWM module 45 controls the output of the transformer 42 through the switch module 44 to adjust the output voltage V0. In this way, the adapter control circuit 40 can adapt to different electronic devices by dynamically adjusting the magnitude of the output voltage V0, and the output stability of the adapter control circuit 40 is improved.
It is understood that the dynamic loop compensation module 46 can calculate and generate the compensation signal by means of a digital signal or an analog signal.
The invention discloses an adapter control circuit which comprises an input module, a transformer, an output module, a PWM module, a switch module and a dynamic loop compensation module, wherein the input module is connected to the output module through the transformer, the dynamic loop compensation module, the PWM module, the switch module and the transformer are sequentially connected, the output voltage of the output module is V0, the output current signal is I0, the adapter control circuit sets a reference voltage Vref, Vk is V0-Vref, the dynamic loop compensation module controls the PWM module according to Vk and transformer current or Vk and output current I0, and the PWM module controls the on-off of the transformer through the switch module to adjust the output voltage V0. It is understood that the manner in which the dynamic loop compensation module controls the PWM module based on at least Vk in the present invention includes, but is not limited to, the dynamic loop compensation module controlling the PWM module based on at least Vk directly, or indirectly. And the mode of controlling the PWM module at least directly according to the Vk is that the Vk is directly acquired by the dynamic loop compensation module. Controlling the PWM module at least indirectly based on Vk may be understood as the dynamic loop compensation module receiving signal Vk × f (x), f (x) may be a non-1 constant or any other circuit or system that represents a function of the circuit or system, such as one or more of capacitance, resistance, and inductance. Correspondingly, the voltage acquisition module can directly acquire the voltage signal or indirectly acquire the voltage signal. It is preferred in the present invention that the dynamic loop compensation module controls the PWM module at least indirectly based on Vk.
Referring to fig. 5, a fifth embodiment of the present invention provides an adapter that uses any one of the adapter control circuits disclosed in the present invention.
Compared with the prior art, the adapter control circuit and the adapter provided by the invention are provided with the dynamic loop compensation module, the dynamic loop compensation module controls the PWM module according to Vk and transformer current or Vk and output current I0, and the PWM module controls the on-off of the transformer through the switch module to adjust the output voltage V0. The adapter control circuit and the adapter provided by the invention can be suitable for different electronic equipment and have the advantage of good output stability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. An adapter control circuit for converting mains electricity into a voltage signal suitable for charging an electronic device, comprising: the adapter control circuit comprises an input module, a transformer, an output module, a PWM module, a switch module and a dynamic loop compensation module, wherein the input module is connected to the output module through the transformer, the dynamic loop compensation module, the PWM module, the switch module and the transformer are sequentially connected, the output voltage of the output module is V0, the output current signal is I0, the adapter control circuit sets a reference voltage Vref, Vk is V0-Vref, the dynamic loop compensation module controls the PWM module according to Vk and the current of the transformer or Vk and the output current I0, and the PWM module controls the on-off of the transformer through the switch module to adjust the output voltage V0;
the adapter control circuit further comprises a voltage compensation module, a transformer current acquisition module, a voltage acquisition module, a first ADC module and a second ADC module, wherein the transformer current acquisition module is connected to the dynamic loop compensation module through the first ADC module, the voltage acquisition module is connected to the dynamic loop compensation module through the second ADC module, the transformer current acquisition module is connected with a transformer and is used for acquiring transformer current, the voltage compensation module is connected with the voltage acquisition module, Vk is generated after compensation processing is carried out on the Vk through the voltage compensation module, the first ADC module and the second ADC module respectively carry out digital processing on the transformer current and Vk ', the dynamic loop compensation module carries out compensation calculation on the digital processed Vk ' and the transformer current and then outputs compensation signals, and the dynamic loop compensation module changes a compensation algorithm according to different digital processed Vk ' and transformer current, the compensation signal controls the PWM module, and the PWM module controls the on-off of the transformer through the switch module to adjust the output voltage V0;
or, the adapter control circuit further comprises a voltage compensation module, a transformer current collection module, a voltage collection module, a first multi-path comparator and a second multi-path comparator, the transformer current collection module is connected to the dynamic loop compensation module through the first multi-path comparator, the voltage collection module is connected to the dynamic loop compensation module through the second multi-path comparator, the transformer current collection module is connected with the transformer and used for collecting transformer current, the voltage compensation module is connected with the voltage collection module, Vk is compensated and processed through the voltage compensation module to generate Vk ', the first multi-path comparator and the second multi-path comparator respectively compare and process transformer current and Vk' and output comparison signals, the dynamic loop compensation module carries out compensation calculation according to the received comparison signals and outputs compensation signals, and the dynamic loop compensation module changes the compensation algorithm according to different comparison signals, the compensation signal controls a PWM module, and the PWM module controls the output of the transformer through a switch module to adjust the output voltage V0;
alternatively, the adapter control circuit further comprises a first ADC module, a second ADC module, the control module is connected with the PWM module, Vk is input to the input end of the first ADC module, output current I0 is input to the input end of the second ADC module, the DAC module, the first ADC module and the second ADC module are all connected with the dynamic loop compensation module, the first ADC module and the second ADC module respectively carry out digital processing on Vk and output current I0, the dynamic loop compensation module carries out compensation calculation on the Vk and output current I0 which are subjected to digital processing and then outputs compensation signals, the dynamic loop compensation module changes a compensation algorithm according to different Vk and output current I0 which are subjected to digital processing, the compensation signals generate analog compensation signals through the DAC module, the control module controls the PWM module according to the analog compensation signals, and the PWM module controls the on-off of a transformer through the switch module to adjust output voltage V0;
or, the adapter control circuit further includes a first multi-path comparator, a second multi-path comparator and a control module connected with the PWM module, Vk is input to an input end of the first multi-path comparator, output current I0 is input to an input end of the second multi-path comparator, the first multi-path comparator and the second multi-path comparator are both connected with the dynamic loop compensation module, the first multi-path comparator and the second multi-path comparator respectively compare Vk with output current I0 and output a comparison signal, the dynamic loop compensation module performs compensation calculation according to the received comparison signal and outputs a compensation signal, the dynamic loop compensation module changes a compensation algorithm according to different comparison signals, the control module controls the PWM module according to the compensation signal, and the PWM module controls the transformer to be switched on and off through the switch module to adjust output voltage V0.
2. The adapter control circuit of claim 1, wherein: the voltage acquisition module acquires Vk' signals through an optical coupler or a magnetic coupler.
3. The adapter control circuit of claim 1, wherein: the voltage acquisition module comprises an optical coupler output unit Ub, one end of the optical coupler output unit Ub is connected with the dynamic loop compensation module, and the other end of the optical coupler output unit Ub is grounded; the adapter control circuit is provided with an operation circuit for calculating Vk, and the operation circuit and the voltage compensation circuit are configured as follows: the voltage stabilizing circuit comprises a resistor R1 and a resistor R2 which are connected in series, wherein the first end of the resistor R1 is connected to an output module, the second end of the resistor R1 and the first end of the resistor R2 are both connected to a node A, the second end of the resistor R2 is grounded, the voltage stabilizing circuit further comprises a resistor R5, an optical coupling input unit Ua and a voltage stabilizing source TL431, the first end of the resistor R5 is connected to the output module, the optical coupling input unit Ua is connected between the second end of the resistor R5 and the cathode of the voltage stabilizing source TL431, a node B is formed between the optical coupling input unit Ua and the voltage stabilizing source TL431, the anode of the voltage stabilizing source TL431 is grounded, the reference electrode is connected to the; the output voltage V0 and a voltage stabilizing source TL431 set Vref are subjected to subtraction operation to obtain Vk, the Vk further comprises a resistor R3 and a capacitor C1, the resistor R3 and the capacitor C1 are connected between nodes A and B in series and used for compensating the Vk, the Vk is compensated through a resistor R3 and a capacitor C1 to generate Vk ', and the Vk' is coupled to an optical coupler output unit Ub through an optical coupler input unit Ua.
4. The adapter control circuit of claim 1, wherein: the switch module comprises a MOS tube Q1, the grid electrode of the MOS tube Q1 is connected to the PWM module, the drain electrode of the MOS tube Q1 is connected with the front end of the transformer, a capacitor C0 is connected between the source electrode and the drain electrode of the MOS tube Q1, the source electrode of the MOS tube Q1 is grounded through a resistor R0, and the transformer current acquisition module is connected with the source electrode of the MOS tube Q1 to acquire the current of the transformer.
5. The adapter control circuit of claim 1, wherein: the dynamic loop compensation module provides different compensation algorithms according to the voltage interval to which Vk belongs and the current interval to which the transformer current or the output current I0 belongs.
6. An adapter, characterized by: comprising an adapter control circuit according to any of claims 1-5.
CN201810456760.1A 2018-05-14 2018-05-14 Adapter control circuit and adapter Active CN108631619B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102332826A (en) * 2010-07-13 2012-01-25 昂宝电子（上海）有限公司 System and method for sensing and adjustment of primary side of flyback power converter
CN106155168A (en) * 2015-05-15 2016-11-23 联发科技股份有限公司 Carry out the device and method of multiloop power control in the electronic device
CN107370399A (en) * 2016-05-13 2017-11-21 中兴通讯股份有限公司 A kind of loop compensation circuit, switching power circuit and Switching Power Supply charger
CN209881480U (en) * 2018-05-14 2019-12-31 深圳市全爆款科技有限公司 Adapter control circuit and adapter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9774266B2 (en) * 2014-09-27 2017-09-26 Apple Inc. Reducing output voltage undershoot in isolated power converters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102332826A (en) * 2010-07-13 2012-01-25 昂宝电子（上海）有限公司 System and method for sensing and adjustment of primary side of flyback power converter
CN106155168A (en) * 2015-05-15 2016-11-23 联发科技股份有限公司 Carry out the device and method of multiloop power control in the electronic device
CN107370399A (en) * 2016-05-13 2017-11-21 中兴通讯股份有限公司 A kind of loop compensation circuit, switching power circuit and Switching Power Supply charger
CN209881480U (en) * 2018-05-14 2019-12-31 深圳市全爆款科技有限公司 Adapter control circuit and adapter

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