CN106849196A - Intelligent Single-Chip Based control system battery charger based on integrated chip - Google Patents
Intelligent Single-Chip Based control system battery charger based on integrated chip Download PDFInfo
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- CN106849196A CN106849196A CN201510880765.3A CN201510880765A CN106849196A CN 106849196 A CN106849196 A CN 106849196A CN 201510880765 A CN201510880765 A CN 201510880765A CN 106849196 A CN106849196 A CN 106849196A
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- H02J7/0086—
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of Intelligent Single-Chip Based control system battery charger based on integrated chip, mainly it is made up of TOP24X integrated chip circuitries module, main output module, output breaking circuit module, constant voltage circuit module and constant-current circuit；There is high power present invention utilizes TOP24X integrated chips（Up to 250W）, highly integrated efficiency（MOSFET, PWM control, error protection, electric circuit inspection and other functions are integrated in one）The characteristics of, and outer member is few, EMI low and the advantages of powerful autoprotection so that the advantages of product is provided with low cost, convenient for production, strong antijamming capability, safety and reliability high.
Description
Technical field
The present invention relates to field of switch power, more particularly to Switching Power Supply battery charger.
Background technology
Current TOP24X integrated chips are with its highly integrated efficiency（MOSFET, PWM control, error protection, electric circuit inspection and other functions are integrated in one）And outer member it is few, be used widely in field of switch power the advantages of EMI is low, defencive function is powerful, but particularity due to charger in functional requirement causes that it is still a vacancy in charger field application.
The content of the invention
For above-mentioned the problems of the prior art and shortcoming; the present invention proposes a kind of Intelligent Single-Chip Based control system battery charger based on integrated chip; TOP24X belongs to forth generation TOPSwitch-GX series of products; using defencive functions such as its integrated level high, outer member few and itself institute's band excess temperature, excessively streams; cost and EMI can be effectively reduced, while also causing that production technology is easier, safety and reliability is higher.
Technical scheme is as follows：A kind of charger based on TOP24X integrated chips, including TOP24X integrated chip circuitries module 1, main output module 2, output breaking circuit module 3, constant voltage circuit module 4, constant-current circuit module 5；
TOP24X integrated chips, have six lead ends, they are respectively control end C, wireline inspection end L, carrying current setting end X, drain D, source S, switching frequency selection end F, primary is set to produce pulsating current by the break-make of not stopping of drain D and source S, again by transformer coupled to secondary, secondary that output state is fed back into control pin again, control pin produces a PWM drive signal to control the make-and-break time of drain electrode and source electrode by a series of its control circuit being internally integrated again.Using wireline inspection end（L）It is capable of achieving four kinds of functions：Overvoltage（OV）Protection；Under-voltage（UV）Protection；Electric voltage feed forward（It is used for reducing maximum duty cycle when line voltage is too low）；Long-range on/off（ON/OFF）And synchronization.And limit of utilization current settings end（X）, can be from the carrying current of external setting-up chip.End is selected using switching frequency（F）For selecting switch frequency, in most cases switching frequency is 132KHz, and this helps to reduce the volume of high frequency transformer and whole Switching Power Supply, under some special occasions, frequency can be selected for 66KHz, to reduce external frequency interferences.In addition the also built-in overheat protector of TOP24X integrated chips；
Output breaking circuit module 3, when output voltage is detected or electric current is less than setting value, output circuit is disconnected；
Constant voltage circuit module 4, for detecting output voltage, when output voltage is more than the magnitude of voltage for setting, produces one and feeds back signal to TOP24X integrated chip circuitries module 1, and the dutycycle for opening drain electrode and source electrode reduces, so as to reach constant pressure effect；
Constant-current circuit module 5, for detecting output current, when output current is more than the current value for setting, produces one and feeds back signal to TOP24X integrated chip circuitries module 1, and the dutycycle for opening drain electrode and source electrode reduces, so as to reach constant current effect.
Using charger provided by the present invention, compared with Switching Power Supply managing chip plus power switch pipe scheme and RCC schemes that background technology is mentioned, its circuit is simple, peripheral component is few, EMI is low, the highly integrated efficiency of TOP24X integrated chips（MOSFET, PWM control, error protection, electric circuit inspection and other functions are integrated in one）The characteristics of so that product is also improved while cost is reduced in terms of safety and reliability.
The present invention is that be applied to the advantage of TOP24X integrated chips on charger by the functions such as constant current, output shut-off needed for adding charger on the ripe switching power circuit of TOP24X integrated chips.
Brief description of the drawings
Accompanying drawing 1 is theory diagram of the invention.
Specific embodiment
Operation principle of the present invention is described further with reference to Fig. 1：
Patent of the present invention is a kind of charger based on TOP24X integrated chips, including TOP24X integrated chip circuitries module 1, main output module 2, output breaking circuit module 3, constant voltage circuit module 4, constant-current circuit module 5, TOP24X integrated chip circuitries module 1, have six lead ends, they are respectively control end C, wireline inspection end L, carrying current sets end X, drain D, source S, switching frequency selects end F, primary is set to produce pulsating current by the break-make of not stopping of drain D and source S, again by transformer coupled to secondary, output state is fed back to control pin by secondary again, control pin produces a PWM drive signal to control the make-and-break time of drain electrode and source electrode by a series of its control circuit being internally integrated again.Using wireline inspection end（L）It is capable of achieving four kinds of functions：Overvoltage（OV）Protection；Under-voltage（UV）Protection；Electric voltage feed forward（It is used for reducing maximum duty cycle when line voltage is too low）；Long-range on/off（ON/OFF）And synchronization.And limit of utilization current settings end（X）, can be from the carrying current of external setting-up chip.End is selected using switching frequency（F）For selecting switch frequency, in most cases switching frequency is 132KHz, and this helps to reduce the volume of high frequency transformer and whole Switching Power Supply, under some special occasions, frequency can be selected for 66KHz, to reduce external frequency interferences.In addition the also built-in overheat protector of TOP24X integrated chips；
When power supply electrifying,AC85~265V alternating currents are changed into direct current by current rectifying and wave filtering circuit,It is primary to TOP24X integrated chips by transformer T1,Start to produce pulsating current with the frequency copped wave of 132KHz after TOP24X drain Ds and source S receive voltage,Pulsating current is coupled to secondary by transformer T1 primary,Again by main output circuit module 2,Constant voltage circuit module 4 also begins to work when output DC voltage is detected more than setting value simultaneously,Constant voltage circuit will produce one to feed back signal to the pin of TL431 the 3rd higher than 2.5V,Reduce the resistance between the 2nd pin of TL431 and the 1st pin,Make to increase by the pin of photoelectrical coupler U2 the 1st and the 2nd pin electric current,Increase electric current between the pin of photoelectrical coupler U2 the 3rd and the 4th pin by coupling,Increased by the electric current of the pin of TOP24X integrated chips the 1st to ground simultaneously,So that the dutycycle that the drain electrode of TOP24X integrated chips and source electrode are opened reduces,So as to limit the maximum of output voltage,At the same time other two-way auxiliary circuits have similarly obtained DC voltage by current rectifying and wave filtering circuit,Powered to TOP24X integrated chips and output feedback circuit respectively.
The working method of constant-current circuit module 5 is similar to constant voltage circuit module 4, when in charger charging process, when detecting output current more than setting value, constant-current circuit produces a level higher than 2.5V to pass through U1 and photoelectrical coupler U2 to TOP24X integrated chip gate pole C-terminals, reduce its drain D and the dutycycle of opening of source S, so as to limit the maximum of output current.
After electricity on charger, output breaking circuit module 3 starts detection charger output, if not connecting battery, battery plus-negative plate short circuit or both positive and negative polarity reversal connection, charger output shut-off, if being still within above state in a period of time, then charger is no longer opened until charger is re-powered, if charger connects battery well in a period of time, charger is charged normal, until battery charge is less than setting electric current, now battery is full of, and output breaking circuit module 3 turns off output.
Provided by the present invention have that outer member is few, defencive function is powerful, the low advantages of EMI based on TOP24X integrated chip chargers so that product cost reduction, safety and reliability are higher, make it more competitive in like product.
Invention described above implementation method, is not intended to limit the scope of the present invention..Any modification made within the spirit and principles in the present invention, equivalent and improvement etc., should be included within claims of the invention.
Claims (1)
1. a kind of Intelligent Single-Chip Based control system battery charger based on integrated chip, it is characterised in that including：TOP24X integrated chip circuitries module, main output module, output breaking circuit module, constant voltage circuit module, constant-current circuit module；Described TOP24X integrated chip circuitries module is electrically connected with main output module, constant voltage circuit module and constant-current circuit module, and described main output module is electrically connected with output breaking circuit module, constant voltage circuit module and constant-current circuit module；Described TOP24X integrated chip circuitry modules, for receiving and processing main output module feedback signal, then control the output of charger by adjusting service time；Described output breaking circuit module, for detecting battery charging state, when output short-circuit, output both positive and negative polarity reversal connection, charger do not connect battery or battery full of when automatically shut down charger output；Described constant voltage circuit module, TOP24X integrated chips are fed back to for detecting and processing output voltage signal；Described constant-current circuit module, TOP24X integrated chips are fed back to for detecting and processing output current signal；The TOP24X integrated chip circuitries module has six lead ends, i.e. control end, wireline inspection end, carrying current setting end, drain electrode, source electrode and switching frequency selection end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510880765.3A CN106849196A (en) | 2015-12-03 | 2015-12-03 | Intelligent Single-Chip Based control system battery charger based on integrated chip |
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| CN201510880765.3A CN106849196A (en) | 2015-12-03 | 2015-12-03 | Intelligent Single-Chip Based control system battery charger based on integrated chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109591657A (en) * | 2018-11-12 | 2019-04-09 | 合肥众建翔新能源有限公司 | A kind of new-energy automobile smart charge control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109591657A (en) * | 2018-11-12 | 2019-04-09 | 合肥众建翔新能源有限公司 | A kind of new-energy automobile smart charge control system |
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Application publication date: 20170613 |
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| WD01 | Invention patent application deemed withdrawn after publication |