CN208337956U - LED constant current circuit based on metal-oxide-semiconductor - Google Patents
LED constant current circuit based on metal-oxide-semiconductor Download PDFInfo
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- CN208337956U CN208337956U CN201821072639.0U CN201821072639U CN208337956U CN 208337956 U CN208337956 U CN 208337956U CN 201821072639 U CN201821072639 U CN 201821072639U CN 208337956 U CN208337956 U CN 208337956U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model is a kind of LED constant current circuit based on metal-oxide-semiconductor.It includes power input unit, Overvoltage protecting unit, constant-current control unit, LED load unit, LED constant current unit, and the power input unit is connected with the Overvoltage protecting unit, constant-current control unit, LED load unit respectively；The Overvoltage protecting unit is also connected with the constant-current control unit, LED load unit respectively；The LED constant current unit is connected with the constant-current control unit, LED load unit respectively.
Description
Technical field
The utility model relates to a kind of car light circuits, especially disclose a kind of LED constant current circuit based on metal-oxide-semiconductor.
Background technique
Vehicular lamp is just replacing the situation development of halogen bulb comprehensively towards LED light at present, on the market most of linear perseverances
Stream driving has triode to build, due to the disadvantages such as the conducting internal resistance of triode is big, and power density is low, and response frequency is low,
The some pairs of small environment in cooling requirements height, space are not particularly suited for, use occasion is comparatively limited to.
Summary of the invention
The purpose of the utility model is to overcome defects existing in the prior art, provide a kind of more applicable small space situations
The LED constant current circuit based on metal-oxide-semiconductor.
The utility model is realized in this way: a kind of LED constant current circuit based on metal-oxide-semiconductor, including power input unit, mistake
Press protection location, constant-current control unit, LED load unit, LED constant current unit, it is characterised in that: the power input unit point
It is not connected with the Overvoltage protecting unit, constant-current control unit, LED load unit；The Overvoltage protecting unit also respectively with institute
State constant-current control unit, LED load unit is connected；The LED constant current unit respectively with the constant-current control unit, LED load
Unit is connected；
The LED constant current unit includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th electricity
Hinder R5, the 6th resistance R6, first capacitor C1, the first zener diode Z1, the first metal-oxide-semiconductor Q1；One end of the first resistor R1
Be connected with the constant-current control unit, the other end of the first resistor R1 respectively with one end of the first capacitor C1, first
The cathode of zener diode Z1, the grid of the first metal-oxide-semiconductor Q1 are connected；The drain electrode of first metal-oxide-semiconductor and the LED load unit
Be connected, the source electrode of first metal-oxide-semiconductor respectively with the anode of the first zener diode Z1, first capacitor C1 the other end,
One end of 6th resistance R6, one end of the 5th resistance R5, the 4th resistance R4 one end, one end of 3rd resistor R3, second resistance
One end of R2 is connected；The other end of the second resistance R2 is connected with the constant-current control unit；The 6th resistance R6's is another
One end, the other end of the 5th resistance R5, the other end of the 4th resistance R4,3rd resistor R3 the other end be connected after be grounded, and
It is connected with the constant-current control unit.
The power input unit includes the first pin, second pin, the second capacitor C2, third capacitor C3, the 7th resistance
R7, the 8th resistance R8, the 9th resistance R9, first diode D1, the second two-way Transient Suppression Diode D2；
The second pin respectively with one end of the second capacitor C2, one end of the 7th resistance R7, the 8th resistance R8
One end, one end of the 9th resistance R9, the anode of first diode D1 are connected；The other end of the second capacitor C2 and the third
One end of capacitor C3 is connected, the other end of the third capacitor C3 respectively with first pin, the 7th resistance R7 the other end,
The other end of 8th resistance R8, the other end of the 9th resistance R9 are grounded after being connected；The cathode of the first diode D1 with it is described
It is connected after one end of second two-way Transient Suppression Diode D2 is connected, respectively with the constant-current control unit, LED load unit；
The other end of the second two-way Transient Suppression Diode D2 is grounded.
The Overvoltage protecting unit includes the second zener diode Z2, the 4th capacitor C4, the second triode Q2；
The cathode of the second zener diode Z2 respectively with the power input unit, constant-current control unit, LED load
Unit is connected；The anode of the second zener diode Z2 respectively with the base stage of the second triode Q2, the 4th capacitor C4
One end is connected；The other end of the 4th capacitor C4 is grounded after being connected with the emitter of the second triode Q2；Described second
The collector of triode Q2 is connected with the constant-current control unit.
The constant-current control unit includes the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, the 5th capacitor
C5, the 6th capacitor C6, third transistor Q3；
One end of the tenth resistance R10 be connected with one end of eleventh resistor R11 and respectively with the overvoltage protection list
Member is connected with LED load unit；The other end of the eleventh resistor R11 respectively with the other end of the tenth resistance R10, mistake
Press protection location, the collector of third transistor Q3, one end of the 5th capacitor C5, one end of twelfth resistor R12, LED constant current
The first resistor R1 of unit is connected；The base stage of the third transistor Q3 respectively with one end of the 6th capacitor C6, LED constant current
The second resistance R2 of unit is connected；The emitter of the third transistor Q3 respectively with the other end of the 5th capacitor C5,
The other end of 12 resistance R12, the other end of the 6th capacitor C6 are grounded after being connected, and are connected with the LED constant current unit.
The LED load unit includes the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, first
Light emitting diode LD1, the second light emitting diode LD2, third light emitting diode LD3, the 4th light emitting diode LD4；
One end of the 7th capacitor C7 respectively with Overvoltage protecting unit, power input unit, the first light emitting diode LD1
Anode, the anode of the second light emitting diode LD2, the 9th capacitor C9 one end be connected；The other end of the 7th capacitor C7 point
Not with one end of the 8th capacitor C8, the cathode of the first light emitting diode LD1, the anode of the 4th light emitting diode LD4, second
The cathode of light emitting diode LD2, the anode of third light emitting diode LD3, the other end of the 9th capacitor C9, the tenth capacitor C10
One end is connected；The other end of 8th capacitor C8 respectively with the cathode of the 4th light emitting diode LD4, third light emitting diode LD3
Cathode, the tenth capacitor C10 the other end be connected after, be connected with the LED constant current unit.
The beneficial effects of the utility model are: the series-parallel LED circuit of the utility model is applicable in, due to metal-oxide-semiconductor power ratio
Triode is bigger, and some power are relatively large and the lesser occasion of heat dissipation area is more applicable in.Perseverance is mainly realized by metal-oxide-semiconductor
The advantages that stream has conducting internal resistance small, corresponding frequencies block, high-power small size.
Detailed description of the invention
Fig. 1 is this practical circuit type structural schematic diagram.
Specific embodiment
According to Fig. 1, the utility model includes power input unit, Overvoltage protecting unit, constant-current control unit, LED load
Unit, LED constant current unit, it is characterised in that: the power input unit respectively with the Overvoltage protecting unit, current constant control list
Member, LED load unit are connected；The Overvoltage protecting unit is also connected with the constant-current control unit, LED load unit respectively；
The LED constant current unit is connected with the constant-current control unit, LED load unit respectively.
The LED constant current unit includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th electricity
Hinder R5, the 6th resistance R6, first capacitor C1, the first zener diode Z1, the first metal-oxide-semiconductor Q1；One end of the first resistor R1
Be connected with the constant-current control unit, the other end of the first resistor R1 respectively with one end of the first capacitor C1, first
The cathode of zener diode Z1, the grid of the first metal-oxide-semiconductor Q1 are connected；The drain electrode of first metal-oxide-semiconductor and the LED load unit
Be connected, the source electrode of first metal-oxide-semiconductor respectively with the anode of the first zener diode Z1, first capacitor C1 the other end,
One end of 6th resistance R6, one end of the 5th resistance R5, the 4th resistance R4 one end, one end of 3rd resistor R3, second resistance
One end of R2 is connected；The other end of the second resistance R2 is connected with the constant-current control unit；The 6th resistance R6's is another
One end, the other end of the 5th resistance R5, the other end of the 4th resistance R4,3rd resistor R3 the other end be connected after be grounded, and
It is connected with the constant-current control unit.
The power input unit includes the first pin, second pin, the second capacitor C2, third capacitor C3, the 7th resistance
R7, the 8th resistance R8, the 9th resistance R9, first diode D1, the second two-way Transient Suppression Diode D2；
The second pin respectively with one end of the second capacitor C2, one end of the 7th resistance R7, the 8th resistance R8
One end, one end of the 9th resistance R9, the anode of first diode D1 are connected；The other end of the second capacitor C2 and the third
One end of capacitor C3 is connected, the other end of the third capacitor C3 respectively with first pin, the 7th resistance R7 the other end,
The other end of 8th resistance R8, the other end of the 9th resistance R9 are grounded after being connected；The cathode of the first diode D1 with it is described
It is connected after one end of second two-way Transient Suppression Diode D2 is connected, respectively with the constant-current control unit, LED load unit；
The other end of the second two-way Transient Suppression Diode D2 is grounded.
The Overvoltage protecting unit includes the second zener diode Z2, the 4th capacitor C4, the second triode Q2；
The cathode of the second zener diode Z2 respectively with the power input unit, constant-current control unit, LED load
Unit is connected；The anode of the second zener diode Z2 respectively with the base stage of the second triode Q2, the 4th capacitor C4
One end is connected；The other end of the 4th capacitor C4 is grounded after being connected with the emitter of the second triode Q2；Described second
The collector of triode Q2 is connected with the constant-current control unit.
The constant-current control unit includes the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, the 5th capacitor
C5, the 6th capacitor C6, third transistor Q3；
One end of the tenth resistance R10 be connected with one end of eleventh resistor R11 and respectively with the overvoltage protection list
Member is connected with LED load unit；The other end of the eleventh resistor R11 respectively with the other end of the tenth resistance R10, mistake
Press protection location, the collector of third transistor Q3, one end of the 5th capacitor C5, one end of twelfth resistor R12, LED constant current
The first resistor R1 of unit is connected；The base stage of the third transistor Q3 respectively with one end of the 6th capacitor C6, LED constant current
The second resistance R2 of unit is connected；The emitter of the third transistor Q3 respectively with the other end of the 5th capacitor C5,
The other end of 12 resistance R12, the other end of the 6th capacitor C6 are grounded after being connected, and are connected with the LED constant current unit.
The LED load unit includes the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, first
Light emitting diode LD1, the second light emitting diode LD2, third light emitting diode LD3, the 4th light emitting diode LD4；
One end of the 7th capacitor C7 respectively with Overvoltage protecting unit, power input unit, the first light emitting diode LD1
Anode, the anode of the second light emitting diode LD2, the 9th capacitor C9 one end be connected；The other end of the 7th capacitor C7 point
Not with one end of the 8th capacitor C8, the cathode of the first light emitting diode LD1, the anode of the 4th light emitting diode LD4, second
The cathode of light emitting diode LD2, the anode of third light emitting diode LD3, the other end of the 9th capacitor C9, the tenth capacitor C10
One end is connected；The other end of 8th capacitor C8 respectively with the cathode of the 4th light emitting diode LD4, third light emitting diode LD3
Cathode, the tenth capacitor C10 the other end be connected after, be connected with the LED constant current unit.
When the utility model is used, the second capacitor C2 of the power input unit, third capacitor C3 input filter, the
Seven resistance R7, the 8th resistance R8, the 9th small signal of resistance R9 filtering clutter, avoid small signal interference, and first diode D1 is prevented
Circuit is inverse to connect damage circuit, the second two-way Transient Suppression Diode D2 Anti-surging TVS pipe.
The Overvoltage protecting unit: voltage exceeds the second zener diode Z2 pressure stabilizing value, and the second triode Q2 of driving will be electric
Road Continuity signal drags down, circuit function failure.
The constant-current control unit and LED constant current unit: by passing through 3rd resistor R3, the 4th resistance R4, the 5th resistance
The current regulation third transistor Q3 base voltage of R5, the 6th resistance R6 resistance come to control the on state of the first metal-oxide-semiconductor Q1
Realize constant current.
The LED load unit, mainly lighting requirements needed for realization circuit.
Claims (5)
1. a kind of LED constant current circuit based on metal-oxide-semiconductor, including power input unit, Overvoltage protecting unit, constant-current control unit,
LED load unit, LED constant current unit, it is characterised in that: the power input unit respectively with the Overvoltage protecting unit, perseverance
Flow control unit, LED load unit are connected；The Overvoltage protecting unit also respectively with the constant-current control unit, LED load list
Member is connected；The LED constant current unit is connected with the constant-current control unit, LED load unit respectively；
The LED constant current unit includes first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance
R5, the 6th resistance R6, first capacitor C1, the first zener diode Z1, the first metal-oxide-semiconductor Q1；One end of the first resistor R1 with
The constant-current control unit is connected, the other end of the first resistor R1 respectively with one end of the first capacitor C1, first steady
The grid of the cathode, the first metal-oxide-semiconductor Q1 of pressing diode Z1 is connected；The drain electrode of first metal-oxide-semiconductor and the LED load unit phase
Even, the source electrode of first metal-oxide-semiconductor respectively with the anode of the first zener diode Z1, the other end of first capacitor C1, the
One end, one end of the 5th resistance R5, one end of the 4th resistance R4, one end of 3rd resistor R3, second resistance R2 of six resistance R6
One end be connected；The other end of the second resistance R2 is connected with the constant-current control unit；The 6th resistance R6's is another
End, the other end of the 5th resistance R5, the other end of the 4th resistance R4,3rd resistor R3 the other end be connected after be grounded, and with
The constant-current control unit is connected.
2. the LED constant current circuit based on metal-oxide-semiconductor according to claim 1, it is characterised in that: the power input unit
Including the first pin, second pin, the second capacitor C2, third capacitor C3, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9,
First diode D1, the second two-way Transient Suppression Diode D2；
The second pin respectively with one end of the second capacitor C2, one end of the 7th resistance R7, the 8th resistance R8 one end,
One end of 9th resistance R9, the anode of first diode D1 are connected；The other end and the third capacitor of the second capacitor C2
One end of C3 is connected, the other end of the third capacitor C3 respectively with first pin, the other end of the 7th resistance R7, the 8th
The other end of resistance R8, the 9th resistance R9 the other end be connected after be grounded；The cathode of the first diode D1 and described second
It is connected after one end of two-way Transient Suppression Diode D2 is connected, respectively with the constant-current control unit, LED load unit；It is described
The other end of second two-way Transient Suppression Diode D2 is grounded.
3. the LED constant current circuit based on metal-oxide-semiconductor according to claim 1, it is characterised in that: the Overvoltage protecting unit
Including the second zener diode Z2, the 4th capacitor C4, the second triode Q2；
The cathode of the second zener diode Z2 respectively with the power input unit, constant-current control unit, LED load unit
It is connected；Positive one end with the base stage of the second triode Q2, the 4th capacitor C4 respectively of the second zener diode Z2
It is connected；The other end of the 4th capacitor C4 is grounded after being connected with the emitter of the second triode Q2；Two or three pole
The collector of pipe Q2 is connected with the constant-current control unit.
4. the LED constant current circuit based on metal-oxide-semiconductor according to claim 1, it is characterised in that: the constant-current control unit
Including the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, the 5th capacitor C5, the 6th capacitor C6, third transistor
Q3；
One end of the tenth resistance R10 be connected with one end of eleventh resistor R11 and respectively with the Overvoltage protecting unit and
LED load unit is connected；The other end of the eleventh resistor R11 is protected with the other end of the tenth resistance R10, over-voltage respectively
Protect unit, the collector of third transistor Q3, one end of the 5th capacitor C5, one end of twelfth resistor R12, LED constant current unit
First resistor R1 be connected；The base stage of the third transistor Q3 respectively with one end of the 6th capacitor C6, LED constant current unit
Second resistance R2 be connected；The emitter of the third transistor Q3 respectively with the other end of the 5th capacitor C5, the 12nd
The other end of resistance R12, the 6th capacitor C6 the other end be connected after be grounded, and be connected with the LED constant current unit.
5. the LED constant current circuit based on metal-oxide-semiconductor according to claim 1, it is characterised in that: the LED load unit
Including the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9, the tenth capacitor C10, the first light emitting diode LD1, second luminous two
Pole pipe LD2, third light emitting diode LD3, the 4th light emitting diode LD4；
One end of the 7th capacitor C7 respectively with Overvoltage protecting unit, power input unit, the first light emitting diode LD1 just
Pole, the anode of the second light emitting diode LD2, one end of the 9th capacitor C9 are connected；The other end of the 7th capacitor C7 respectively with
One end of the 8th capacitor C8, the cathode of the first light emitting diode LD1, the anode of the 4th light emitting diode LD4, second shine
One end of the cathode of diode LD2, the anode of third light emitting diode LD3, the other end of the 9th capacitor C9, the tenth capacitor C10
It is connected；The other end of 8th capacitor C8 respectively with the cathode of the 4th light emitting diode LD4, third light emitting diode LD3 cathode,
After the other end of tenth capacitor C10 is connected, it is connected with the LED constant current unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821072639.0U CN208337956U (en) | 2018-07-08 | 2018-07-08 | LED constant current circuit based on metal-oxide-semiconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821072639.0U CN208337956U (en) | 2018-07-08 | 2018-07-08 | LED constant current circuit based on metal-oxide-semiconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208337956U true CN208337956U (en) | 2019-01-04 |
Family
ID=64786470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821072639.0U Active CN208337956U (en) | 2018-07-08 | 2018-07-08 | LED constant current circuit based on metal-oxide-semiconductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208337956U (en) |
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2018
- 2018-07-08 CN CN201821072639.0U patent/CN208337956U/en active Active
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