CN206024157U - constant-current LED control chip - Google Patents
constant-current LED control chip Download PDFInfo
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- CN206024157U CN206024157U CN201620756328.0U CN201620756328U CN206024157U CN 206024157 U CN206024157 U CN 206024157U CN 201620756328 U CN201620756328 U CN 201620756328U CN 206024157 U CN206024157 U CN 206024157U
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Abstract
This utility model is related to chip technology field, more particularly to constant-current LED control chip.Including alternating current power supply, alternating current power supply one end connects wave filter A；The outfan connection rectifier input of wave filter A, commutator A outfans connect high frequency transformer；High frequency transformer outfan connects the input of the input of wave filter B and DC DC transducers respectively；The outfan of wave filter B connects the input of commutator B, the outfan connection LED strip connection module input of commutator B；LED strip gang mould block outfan connects the input of PWM controller；The outfan connection constant-current control module of PWM controller, constant-current control module one end connects feedback control module；Feedback control module one end connects DC DC switch inputs, and DC DC converter output ends connect high frequency transformer；Alternating current power supply provides power supply for LED strip gang mould block；High frequency transformer, wave filter B, commutator B, LED strip gang mould block, PWM controller, constant-current control module, feedback control module and DC DC transducers form closed loop control.
Description
Technical field
This utility model is related to chip technology field, more particularly to constant-current LED control chip.
Background technology
Light emitting diode（Light-Emitting Diode, abbreviation LED）So that its energy consumption is low, life-span length and high excellent of brightness
Point, is widely used in every field.Use LED as display screen backlight when, need using LED current constant control chips
Constant-current driving is carried out to which.As LED current constant controls chip itself is limited by the cost such as encapsulating, its current constant control pin is resistance to
Pressure is relatively low, it is difficult to meet the demand of LED High voltage outputs.Therefore, if any pin short circuit in LED, then high voltage will
Current constant control pin is flowed directly into, so as to cause LED current constant control chips to be damaged.
Utility model content
Technical problem to be solved in the utility model, is for above-mentioned technical deficiency, there is provided a kind of periphery
Element is few, scheme low cost, the constant-current LED control chip for opening short-circuit protection characteristic with LED outputs.
For solving above-mentioned technical problem, the technical scheme adopted by this utility model is：Including alternating current power supply, alternating current power supply
One end connects wave filter A；The outfan connection rectifier input of wave filter A, commutator A outfans connect high frequency transformer；
High frequency transformer outfan connects the input of wave filter B and the input of dc-dc respectively；The outfan of wave filter B
The input of connection commutator B, the outfan connection LED strip connection module input of commutator B；LED strip gang mould block outfan connects
Connect the input of PWM controller；The outfan connection constant-current control module of PWM controller, the connection of constant-current control module one end are anti-
Feedback control module；Feedback control module one end connects dc-dc input, and dc-dc outfan connection high frequency becomes
Depressor；Alternating current power supply provides power supply for LED strip gang mould block；High frequency transformer, wave filter B, commutator B, LED strip gang mould block, PWM
Controller, constant-current control module, feedback control module and dc-dc form closed loop control.
Further optimize the technical program, described PWM controller includes resistor, stabilivolt, audion and metal-oxide-semiconductor,
Stabilivolt one end connects resistor, and stabilivolt other end connecting triode, audion one end connect metal-oxide-semiconductor；By voltage stabilizing management and control
The conducting voltage of audion processed, so that control the opening and closing of metal-oxide-semiconductor.
Further optimize the technical program, described dc-dc includes inductance coil, diode, electric capacity one, switch
Pipe, electric capacity two, one one end of electric capacity connect inductance coil, one other end connecting valve pipe of electric capacity；Inductance coil one end connects respectively
There are switching tube and diode, diode one end to connect electric capacity two, one end connecting valve pipe of electric capacity two；When switching tube is turned on,
Electric current pass through inductance coil when can in inductance coil storage energy, now load on voltage provided by electric capacity one；Work as switch
When pipe is closed, inductance coil releases energy, and output voltage is that the voltage that input voltage is produced with inductance coil is added.
Compared with prior art, the beneficial effects of the utility model are：Peripheral cell is few, scheme low cost, have LED
The advantages of short-circuit protection characteristic is opened in output.
Description of the drawings
Fig. 1 is constant-current LED control chip theory diagram.
Fig. 2 is constant-current LED control chip PWM controller theory diagram.
Fig. 3 is constant-current LED control chip DC-DC converter circuit structural representation.
In figure：1st, alternating current power supply；2nd, wave filter A；3rd, commutator A；4th, high frequency transformer；5th, wave filter B；6th, commutator B；
7th, LED strip gang mould block；8th, PWM controller；9th, constant-current controller；10th, feedback controller；11st, dc-dc；12nd, resistance
Device；13rd, stabilivolt；14th, audion；15th, metal-oxide-semiconductor；16th, inductance coil；17th, electric capacity one；18th, switching tube；19th, diode；20、
Electric capacity two.
Specific embodiment
For making the purpose of this utility model, technical scheme and advantage of greater clarity, with reference to specific embodiment
And referring to the drawings, this utility model is further described.It should be understood that these descriptions are simply exemplary, and do not really want
Limit scope of the present utility model.Additionally, in the following description, the description to known features and technology is eliminated, to avoid not
Necessarily obscure concept of the present utility model.
Specific embodiment one：In conjunction with shown in Fig. 1-3, including alternating current power supply 1,1 one end of alternating current power supply connects wave filter A2；
The outfan connection commutator A3 inputs of wave filter A2, commutator A3 outfans connect high frequency transformer 4；High frequency transformer 4
Outfan connects the input of the input of wave filter B5 and dc-dc 11 respectively；The outfan connection of wave filter B5 is whole
The input of stream device B6,7 input of outfan connection LED strip gang mould block of commutator B6；7 outfan of LED strip gang mould block connects
The input of PWM controller 8；The outfan connection constant-current control module 9 of PWM controller 8,9 one end of constant-current control module connects
Feedback control module 10；10 one end of feedback control module connects 11 input of dc-dc, 11 outfan of dc-dc
Connection high frequency transformer 4；Alternating current power supply 1 is that LED strip gang mould block 7 provides power supply；High frequency transformer 4, wave filter B5, commutator
B6, LED strip gang mould block 7, PWM controller 8, constant-current control module 9, feedback control module 10 and dc-dc 11 are formed and are closed
Ring is controlled；PWM controller 8 includes that resistor 12, stabilivolt 13, audion 14 and metal-oxide-semiconductor 15,13 one end of stabilivolt connect resistance
Device 12,13 other end connecting triode 14 of stabilivolt, 14 one end of audion connect metal-oxide-semiconductor 15；Three poles are controlled by stabilivolt 13
The conducting voltage of pipe 14, so that control the opening and closing of metal-oxide-semiconductor 15；Dc-dc 11 includes inductance coil 16, diode
19th, electric capacity 1, switching tube 18, electric capacity 2 20, one 17 one end of electric capacity connect inductance coil 16, and the connection of one 17 other end of electric capacity is opened
Close pipe 18；16 one end of inductance coil is connected to switching tube 18 and diode 19, and 19 one end of diode connects electric capacity 2 20, electricity
Hold 2 20 one end connecting valve pipe 18；When switching tube 18 is turned on, electric current pass through inductance coil 16 when can be in inductance coil 16
Middle storage energy, now the voltage in load is by the offer of electric capacity 1；When switching tube 18 is closed, inductance coil 16 discharges energy
Amount, output voltage are that the voltage that input voltage is produced with inductance coil 16 is added.
It should be appreciated that above-mentioned specific embodiment of the present utility model is used only for exemplary illustration or explains this reality
With new principle, and do not constitute to restriction of the present utility model.Therefore, without departing from spirit and scope of the present utility model
In the case of any modification, equivalent substitution and improvements done etc., should be included within protection domain of the present utility model.Additionally,
This utility model claims are intended to fall into scope and border or this scope and border
Whole in equivalents change and modifications example.
Claims (3)
1. constant-current LED control chip, it is characterised in that：Including alternating current power supply (1), alternating current power supply (1) one end connects wave filter A
(2)；Outfan connection commutator A (3) input of wave filter A (2), commutator A (3) outfan connection high frequency transformer (4)；
High frequency transformer (4) outfan connects the input of the input of wave filter B (5) and dc-dc (11) respectively；Wave filter
The input of outfan connection commutator B (6) of B (5), outfan connection LED strip gang mould block (7) input of commutator B (6)
End；The input of LED strip gang mould block (7) outfan connection PWM controller (8)；The outfan connection constant current of PWM controller (8)
Control module (9), constant-current control module (9) one end connection feedback control module (10)；Feedback control module (10) one end connects
Dc-dc (11) input, dc-dc (11) outfan connection high frequency transformer (4)；Alternating current power supply (1) is LED
Serial module structure (7) provides power supply；High frequency transformer (4), wave filter B (5), commutator B (6), LED strip gang mould block (7), PWM controls
Device (8) processed, constant-current control module (9), feedback control module (10) and dc-dc (11) form closed loop control.
2. constant-current LED control chip according to claim 1, it is characterised in that：PWM controller (8) includes resistor
(12), stabilivolt (13), audion (14) and metal-oxide-semiconductor (15), stabilivolt (13) one end connection resistor (12), stabilivolt (13)
Other end connecting triode (14), audion (14) one end connection metal-oxide-semiconductor (15)；Audion (14) is controlled by stabilivolt (13)
Conducting voltage, so as to control the opening and closing of metal-oxide-semiconductor (15).
3. constant-current LED control chip according to claim 1, it is characterised in that：Dc-dc (11) includes inductor wire
Circle (16), diode (19), electric capacity one (17), switching tube (18), electric capacity two (20), one (17) one end of electric capacity connect inductance coil
(16), one (17) other end connecting valve pipe (18) of electric capacity；Inductance coil (16) one end is connected to switching tube (18) and two
Pole pipe (19), diode (19) one end connect electric capacity two (20), one end connecting valve pipe (18) of electric capacity two (20)；Work as switching tube
(18) turn on when, electric current pass through inductance coil (16) when can in inductance coil (16) storage energy, now load on voltage
There is provided by electric capacity one (17)；When switching tube (18) is closed, inductance coil (16) releases energy, output voltage be input voltage with
The voltage that inductance coil (16) is produced is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620756328.0U CN206024157U (en) | 2016-07-15 | 2016-07-15 | constant-current LED control chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620756328.0U CN206024157U (en) | 2016-07-15 | 2016-07-15 | constant-current LED control chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206024157U true CN206024157U (en) | 2017-03-15 |
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ID=58245007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620756328.0U Active CN206024157U (en) | 2016-07-15 | 2016-07-15 | constant-current LED control chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206024157U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282918A (en) * | 2018-01-31 | 2018-07-13 | 江苏飞天照明有限公司 | RGB synchronous intelligent flexible lighting products |
-
2016
- 2016-07-15 CN CN201620756328.0U patent/CN206024157U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282918A (en) * | 2018-01-31 | 2018-07-13 | 江苏飞天照明有限公司 | RGB synchronous intelligent flexible lighting products |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |