CN203206381U - PFC boost module assembly of liquid crystal switching power supply - Google Patents
PFC boost module assembly of liquid crystal switching power supply Download PDFInfo
- Publication number
- CN203206381U CN203206381U CN 201320249672 CN201320249672U CN203206381U CN 203206381 U CN203206381 U CN 203206381U CN 201320249672 CN201320249672 CN 201320249672 CN 201320249672 U CN201320249672 U CN 201320249672U CN 203206381 U CN203206381 U CN 203206381U
- Authority
- CN
- China
- Prior art keywords
- circuit
- pin
- resistance
- liquid crystal
- integrated circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Amplifiers (AREA)
Abstract
The utility model relates to a PFC boost module assembly for a liquid crystal switching power supply. The PFC boost module assembly comprises a voltage sampling circuit, a PWM control drive circuit and a PWM power amplification circuit, the input end of the voltage sampling circuit is connected with a resonant inductive circuit in a PFC boost portion of the liquid crystal switching power supply, the output end of the voltage sampling circuit is connected with the input end of the PWM control drive circuit, the output end of the PWM control drive circuit is connected with the input end of the PWM power amplification circuit, and the output end of the PWM power amplification circuit is connected with the resonant inductive circuit in the PFC boost portion of the liquid crystal switching power supply. The assembly is specially designed for maintaining a damaged partial circuit of an LCD TV and a display. The PFC boost module assembly for the liquid crystal switching power supply has the advantages of small size, simple installation, wide range of service voltage, high added value and the like, thereby providing great convenience for after-sales service and quick home maintenance in the maintenance market.
Description
Technical field
Utility model relates to liquid crystal shutter power supply PFC boost module assembly, adapts to the quick reparation that liquid crystal PFC resonant circuit damages especially.
Background technology
In the pfc circuit of LCD LCD TV and LCD (being designated hereinafter simply as liquid crystal), the circuit of easy damage is the resonant circuit part, and maintenance detects trouble, and is time-consuming and inconvenient during maintenance.
Summary of the invention
The purpose of this utility model is to provide a kind of liquid crystal shutter power supply PFC boost module assembly, adapts to the quick replacement reparation that liquid crystal PFC resonant circuit damages.
The utility model, comprise voltage sample circuit, PWM control drive circuit and pwm power amplifying circuit, the boost resonant inductance circuit of part of the input of voltage sample circuit and liquid crystal shutter power supply PFC is connected, the output of voltage sample circuit is connected with the input of PWM control drive circuit, the output of PWM control drive circuit is connected with the input of pwm power amplifying circuit, and the output of pwm power amplifying circuit and the liquid crystal shutter power supply PFC resonant inductance circuit partly that boosts is connected.
The utility model, be that integrated circuit (IC) 1, resistance R 1-R9, capacitor C 1-C5 and the field effect transistor Q1 of OB6563CP constitutes by model, wherein, voltage sample circuit comprises: resistance R 4, one end of resistance R 4 is connected with the 5th pin of integrated circuit (IC) 1, and the resonant inductance circuit of part that the other end D of resistance R 4 holds and liquid crystal shutter power supply PFC boosts is connected; PWM control drive circuit comprises: the 1st pin of integrated circuit (IC) 1 is by resistance R 6 ground connection, the 1st pin of integrated circuit (IC) 1 be connected capacitor C 2 between the 2nd pin connects, be connected after 1 series connection of resistance R 5 and capacitor C between the 1st pin of integrated circuit (IC) 1 and the 2nd pin connect, form feedback compensation, capacitor C 5 is connected between the 4th pin and ground of integrated circuit (IC) 1, resistance R 9 is connected between the source electrode of the 4th pin of integrated circuit (IC) 1 and field effect transistor Q1, capacitor C 4 is connected between the 8th pin and ground of integrated circuit (IC) 1, behind the 1st pin series resistance R1 of integrated circuit (IC) 1, the E termination liquid crystal circuit of resistance R 1+400V, resistance R 7 and capacitor C 3 and connect after be connected between the 3rd pin and ground of integrated circuit (IC) 1, after the 3rd pin of integrated circuit (IC) 1 connects resistance R 2, the F termination liquid crystal circuit of resistance R 2+300V, the 8th pin A termination IC feeder ear 10V-15V of integrated circuit (IC) 1, B connects liquid crystal thermally; The pwm power amplifying circuit comprises: field effect transistor Q1, the grid of field effect transistor Q1 is connected with the 7th pin by integrated circuit (IC) 1, resistance R 8 is connected between the grid and ground of field effect transistor Q1, ground connection behind the source electrode crosstalk resistance R3 of field effect transistor Q1, the drain electrode of field effect transistor Q1 connect the C end of resonant inductance circuit as output (C).
The utility model is that the partial circuit that aims at maintenance LCD LCD TV and display damages and designs.It is little that this product has a volume, install simple, the use voltage range is wide, the surcharge advantages of higher, it is the major transformation of in the maintenance market LCD liquid crystal television power supply being keeped in repair, in maintenance market, provide especially big convenience to after-sale service and the quick service of calling, had characteristics such as power consumption is little, efficient is high, volume is little, low cost of manufacture.
Description of drawings
Fig. 1 is structural principle block diagram of the present utility model, wherein is liquid crystal PFC power supply part in the frame of broken lines; Fig. 2 is the circuit theory diagrams of embodiment.
Embodiment
Please refer to Fig. 1, a kind of liquid crystal shutter power supply PFC boost module assembly, comprise voltage sample circuit, PWM control drive circuit and pwm power amplifying circuit, the boost resonant inductance circuit of part of the input of voltage sample circuit and liquid crystal shutter power supply PFC is connected, the output of voltage sample circuit is connected with the input of PWM control drive circuit, the output of PWM control drive circuit is connected with the input of pwm power amplifying circuit, and the output of pwm power amplifying circuit and the liquid crystal shutter power supply PFC resonant inductance circuit partly that boosts is connected.
Please refer to Fig. 2, described liquid crystal shutter power supply PFC boost module assembly, be that integrated circuit (IC) 1, resistance R 1-R9, capacitor C 1-C5 and the field effect transistor Q1 of OB6563CP constitutes by model, wherein, voltage sample circuit comprises: resistance R 4, one end of resistance R 4 is connected with the 5th pin of integrated circuit (IC) 1, and the resonant inductance circuit of part that the other end D of resistance R 4 holds and liquid crystal shutter power supply PFC boosts is connected; PWM control drive circuit comprises: the 1st pin of integrated circuit (IC) 1 is by resistance R 6 ground connection, between the 1st pin of integrated circuit (IC) 1 and the 2nd pin, be connected capacitor C 2, be connected after 1 series connection of resistance R 5 and capacitor C between the 1st pin of integrated circuit (IC) 1 and the 2nd pin connect, form feedback compensation, capacitor C 5 is connected between the 4th pin and ground of integrated circuit (IC) 1, resistance R 9 is connected between the source electrode of the 4th pin of integrated circuit (IC) 1 and field effect transistor Q1, capacitor C 4 is connected between the 8th pin and ground of integrated circuit (IC) 1, behind the 1st pin series resistance R1 of integrated circuit (IC) 1, the E termination liquid crystal circuit of resistance R 1+400V, resistance R 7 and capacitor C 3 and connect after be connected between the 3rd pin and ground of integrated circuit (IC) 1, after the 3rd pin of integrated circuit (IC) 1 connects resistance R 2, the F termination liquid crystal circuit of resistance R 2+300V, the 8th pin A termination IC feeder ear 10V-15V of integrated circuit (IC) 1, B connects liquid crystal thermally; The pwm power amplifying circuit comprises: field effect transistor Q1, the grid of field effect transistor Q1 is connected with the 7th pin by integrated circuit (IC) 1, resistance R 8 is connected between the grid and ground of field effect transistor Q1, ground connection behind the source electrode crosstalk resistance R3 of field effect transistor Q1, the drain electrode of field effect transistor Q1 connect the C end of resonant inductance circuit as output C.
Claims (2)
1. liquid crystal shutter power supply PFC boost module assembly, it is characterized in that: comprise voltage sample circuit, PWM control drive circuit and pwm power amplifying circuit, the boost resonant inductance circuit of part of the input of voltage sample circuit and liquid crystal shutter power supply PFC is connected, the output of voltage sample circuit is connected with the input of PWM control drive circuit, the output of PWM control drive circuit is connected with the input of pwm power amplifying circuit, and the output of pwm power amplifying circuit and the liquid crystal shutter power supply PFC resonant inductance circuit partly that boosts is connected.
2. liquid crystal shutter power supply PFC boost module assembly according to claim 1, it is characterized in that: be that integrated circuit (IC) 1, resistance R 1-R9, capacitor C 1-C5 and the field effect transistor Q1 of OB6563CP constitutes by model, wherein, voltage sample circuit comprises: resistance R 4, one end of resistance R 4 is connected with the 5th pin of integrated circuit (IC) 1, and the resonant inductance circuit of part that the other end D of resistance R 4 holds and liquid crystal shutter power supply PFC boosts is connected; PWM control drive circuit comprises: the 1st pin of integrated circuit (IC) 1 is by resistance R 6 ground connection, between the 1st pin of integrated circuit (IC) 1 and the 2nd pin, be connected capacitor C 2, be connected after 1 series connection of resistance R 5 and capacitor C between the 1st pin of integrated circuit (IC) 1 and the 2nd pin connect, form feedback compensation, capacitor C 5 is connected between the 4th pin and ground of integrated circuit (IC) 1, resistance R 9 is connected between the source electrode of the 4th pin of integrated circuit (IC) 1 and field effect transistor Q1, capacitor C 4 is connected between the 8th pin and ground of integrated circuit (IC) 1, behind the 1st pin series resistance R1 of integrated circuit (IC) 1, the E termination liquid crystal circuit of resistance R 1+400V, resistance R 7 and capacitor C 3 and connect after be connected between the 3rd pin and ground of integrated circuit (IC) 1, after the 3rd pin of integrated circuit (IC) 1 connects resistance R 2, the F termination liquid crystal circuit of resistance R 2+300V, the 8th pin A termination IC feeder ear 10V-15V of integrated circuit (IC) 1, B connects liquid crystal thermally; The pwm power amplifying circuit comprises: field effect transistor Q1, the grid of field effect transistor Q1 is connected with the 7th pin by integrated circuit (IC) 1, resistance R 8 is connected between the grid and ground of field effect transistor Q1, ground connection behind the source electrode crosstalk resistance R3 of field effect transistor Q1, the drain electrode of field effect transistor Q1 connect the C end of resonant inductance circuit as output C end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320249672 CN203206381U (en) | 2013-05-09 | 2013-05-09 | PFC boost module assembly of liquid crystal switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320249672 CN203206381U (en) | 2013-05-09 | 2013-05-09 | PFC boost module assembly of liquid crystal switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203206381U true CN203206381U (en) | 2013-09-18 |
Family
ID=49150435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320249672 Expired - Fee Related CN203206381U (en) | 2013-05-09 | 2013-05-09 | PFC boost module assembly of liquid crystal switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203206381U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274910A (en) * | 2018-11-07 | 2019-01-25 | 深圳创维－Rgb电子有限公司 | A kind of Switching Power Supply and TV |
-
2013
- 2013-05-09 CN CN 201320249672 patent/CN203206381U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274910A (en) * | 2018-11-07 | 2019-01-25 | 深圳创维－Rgb电子有限公司 | A kind of Switching Power Supply and TV |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104684155B (en) | LED drive power light adjusting circuit and lamps and lanterns | |
| CN201854184U (en) | Buck circuit | |
| CN102548095A (en) | Lamp and driving circuit thereof | |
| CN203206381U (en) | PFC boost module assembly of liquid crystal switching power supply | |
| CN202487118U (en) | Device for lowering standby power consumption | |
| CN203872267U (en) | LED TV power supply backlight driving circuit | |
| CN203259915U (en) | Single-chip microcomputer high-power PWM output circuit | |
| CN103354083B (en) | Backlight drive circuit and display device | |
| CN101572491A (en) | Switch power circuit and operation method thereof | |
| CN103634542A (en) | Power circuit for liquid crystal television | |
| CN203086369U (en) | PFC boost circuit | |
| CN104240652A (en) | Backlight driving module and liquid crystal displayer | |
| CN202309923U (en) | Voltage stabilizing circuit | |
| CN202798470U (en) | Liquid crystal display television LLC resonant power supply assembly | |
| CN202758591U (en) | Backlight LED driving output circuit and television set | |
| CN102368813A (en) | Voltage-stabilizing circuit | |
| CN203967964U (en) | A kind of LED flat-plate television power supply electric power system | |
| CN102651200B (en) | Liquid crystal backlight driving circuit | |
| CN203206100U (en) | Main power supply repair module assembly of liquid crystal switching power supply | |
| CN205509841U (en) | A switching power supply supply control circuit for LED flat screen television | |
| CN103415118A (en) | Backlight drive circuit, electronic device and backlight drive method | |
| CN202309508U (en) | Frequency conversion control circuit for chip | |
| CN105979657A (en) | White LED step-up conversion system | |
| CN201937934U (en) | Ultraviolet lamp driving circuit | |
| CN201726327U (en) | Power-supply control circuit for large-size liquid crystal display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20210509 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |