CN204886733U - Broad width voltage stabilizing circuit - Google Patents
Broad width voltage stabilizing circuit Download PDFInfo
- Publication number
- CN204886733U CN204886733U CN201520545292.7U CN201520545292U CN204886733U CN 204886733 U CN204886733 U CN 204886733U CN 201520545292 U CN201520545292 U CN 201520545292U CN 204886733 U CN204886733 U CN 204886733U
- Authority
- CN
- China
- Prior art keywords
- resistance
- electric capacity
- chip
- lm5100a
- effect transistor
- 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
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 13
- 230000005669 field effect Effects 0.000 claims abstract description 24
- 239000003381 stabilizer Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a broad width voltage stabilizing circuit, including alternating current input end and earthing terminal, alternating current input end and electric capacity C9's one end, transformer T1's primary's one end, resistance R3's one end, electric capacity C5's one end and chip LM5021's vi end are connected, transformer T1's primary's the other end is connected with field effect transistor Q1's drain electrode, field effect transistor Q1's grid is connected with chip LM5100a's HO end, field effect transistor Q1's source electrode and inductance L1's one end, field effect transistor Q2's drain electrode, electric capacity C8's one end and chip LM5100a's HS end are connected, electric capacity C8's the other end is connected with chip LM5100a's HB end and diode D4's negative pole. Can realize LM5021's broad width steady voltage.
Description
Technical field
The utility model relates to electronic applications, particularly relates to a kind of wide cut voltage stabilizing circuit.
Background technology
LM5021 is the PDM keyer that current mode AD turns DC, existing based on the circuit of LM5021 be all simple voltage stabilizing circuit, wide cut voltage stabilizing cannot be realized.
Summary of the invention
The technical problems to be solved in the utility model, is to provide a kind of wide cut voltage stabilizing circuit, solves the problem that LM5021 does not have wide cut voltage stabilizing circuit.
The utility model is achieved in that a kind of wide cut voltage stabilizing circuit, comprises alternating current input and earth terminal, one end of alternating current input and electric capacity C9, one end of the primary coil of transformer T1, one end of resistance R3, one end of electric capacity C5 is connected with the Vi end of chip LM5021, and the other end of the primary coil of transformer T1 is connected with the drain electrode of field effect transistor Q1, and the grid of field effect transistor Q1 is held with the HO of chip LM5100a and is connected, the source electrode of field effect transistor Q1 and one end of inductance L 1, the drain electrode of field effect transistor Q2, one end of electric capacity C8 is connected with the HS end of chip LM5100a, and the other end of electric capacity C8 holds with the HB of chip LM5100a and the negative pole of diode D4 is connected, the positive pole of diode D4 and one end of electric capacity C10, the vdd terminal of chip LM5100a, the negative pole of diode D1, the VCC end of chip LM5021 is connected with one end of electric capacity C6, the CMP end of chip LM5021 and one end of electric capacity C4, one end of resistance R6 connects, and the other end of resistance R6 is connected with one end of electric capacity C3, the other end of electric capacity C3 and the other end of electric capacity C4, the Vf end of chip LM5021, one end of resistance R11 is connected with one end of resistance R10, and the UV end of chip LM5021 is connected with one end of resistance R2, and the other end of resistance R2 is connected with one end of resistance R1, the CS end of chip LM5021 and one end of electric capacity C2, one end of resistance R5 connects, the other end of resistance R5 and the negative pole of diode D2, one end of resistance R7 connects, one end of the secondary coil of the positive pole of diode D2 and one end of resistance R8 and transformer T1 is connected, the Rt end of chip LM5021 is connected with one end of resistance R4, the Vss end of chip LM5021 is connected with one end of electric capacity C1, the out end of chip LM5021 is held with the Vin of chip LM5100a and is connected, the Rt end of chip LM5100a is connected with one end of R9, and the LO end of chip LM5100a is connected with the grid of field effect transistor Q2, the other end of resistance R11 and the negative pole of voltage-stabiliser tube D3A, one end of electric capacity C7, the other end of inductance L 1, the positive pole of diode D1 is connected with circuit output end, the other end of earth terminal and electric capacity C6, the other end of electric capacity C2, the other end of electric capacity C1, the other end of electric capacity C5, the other end of electric capacity C9, the other end of electric capacity C7, the other end of electric capacity C10, the other end of resistance R3, the other end of resistance R1, the other end of resistance R4, the other end of resistance R7, the other end of resistance R8, the other end of resistance R9, the other end of resistance R10, the other end of resistance R, the other end of the secondary coil of transformer T1, the GND end of chip LM5100a, the GND end of chip LM5021, the source electrode of field effect transistor Q2 is connected with the positive pole of voltage-stabiliser tube D3A.
The utility model tool has the following advantages: the wide cut voltage stabilizing that can realize LM5021.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present utility model.
Embodiment
By describing technology contents of the present utility model, structural feature in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with execution mode.
Refer to Fig. 1, the utility model provides a kind of wide cut voltage stabilizing circuit, comprises alternating current input and earth terminal, one end of alternating current input and electric capacity C9, one end of the primary coil of transformer T1, one end of resistance R3, one end of electric capacity C5 is connected with the Vi end of chip LM5021, and the other end of the primary coil of transformer T1 is connected with the drain electrode of field effect transistor Q1, and the grid of field effect transistor Q1 is held with the HO of chip LM5100a and is connected, the source electrode of field effect transistor Q1 and one end of inductance L 1, the drain electrode of field effect transistor Q2, one end of electric capacity C8 is connected with the HS end of chip LM5100a, and the other end of electric capacity C8 holds with the HB of chip LM5100a and the negative pole of diode D4 is connected, the positive pole of diode D4 and one end of electric capacity C10, the vdd terminal of chip LM5100a, the negative pole of diode D1, the VCC end of chip LM5021 is connected with one end of electric capacity C6, the CMP end of chip LM5021 and one end of electric capacity C4, one end of resistance R6 connects, and the other end of resistance R6 is connected with one end of electric capacity C3, the other end of electric capacity C3 and the other end of electric capacity C4, the Vf end of chip LM5021, one end of resistance R11 is connected with one end of resistance R10, and the UV end of chip LM5021 is connected with one end of resistance R2, and the other end of resistance R2 is connected with one end of resistance R1, the CS end of chip LM5021 and one end of electric capacity C2, one end of resistance R5 connects, the other end of resistance R5 and the negative pole of diode D2, one end of resistance R7 connects, one end of the secondary coil of the positive pole of diode D2 and one end of resistance R8 and transformer T1 is connected, the Rt end of chip LM5021 is connected with one end of resistance R4, the Vss end of chip LM5021 is connected with one end of electric capacity C1, the out end of chip LM5021 is held with the Vin of chip LM5100a and is connected, the Rt end of chip LM5100a is connected with one end of R9, and the LO end of chip LM5100a is connected with the grid of field effect transistor Q2, the other end of resistance R11 and the negative pole of voltage-stabiliser tube D3A, one end of electric capacity C7, the other end of inductance L 1, the positive pole of diode D1 is connected with circuit output end, the other end of earth terminal and electric capacity C6, the other end of electric capacity C2, the other end of electric capacity C1, the other end of electric capacity C5, the other end of electric capacity C9, the other end of electric capacity C7, the other end of electric capacity C10, the other end of resistance R3, the other end of resistance R1, the other end of resistance R4, the other end of resistance R7, the other end of resistance R8, the other end of resistance R9, the other end of resistance R10, the other end of resistance R, the other end of the secondary coil of transformer T1, the GND end of chip LM5100a, the GND end of chip LM5021, the source electrode of field effect transistor Q2 is connected with the positive pole of voltage-stabiliser tube D3A.
Wherein, LM5100a is high voltage gate driver, can be used for the field effect transistor or the half-bridge circuit that drive high-end or low side.LM5021 is the PDM keyer that current mode AD turns DC.After the high voltage of input is carried out linear voltage stabilization by the inside of LM5021, output can drive LM5100a, and these two drive IC are combined into synchronous following controller.
Diode D2 and C6 forms a boostrap circuit, plays as other circuit provide the effect of voltage, effectively can reduce power consumption.T1 is the coiling group of a 100:1., for field effect transistor Q1 provides biased feedback voltage.Inductor L1, can provide high saturation current for Q2.Improve the numerical value of L1, the ripple of output voltage can be reduced.When input exports a high voltage, after input voltage is input to the Vi of LM5021, then export by the out of LM5021 the Vin coming LM5100a, drive LM5100a work.Diode D3 plays the effect of protection LM5100a, and after the bootstrap voltage mode of output voltage lower than D2 and C6, output point voltage will be stabilized on bootstrap voltage mode, realize the wide cut voltage stabilizing of LM5021.
The foregoing is only embodiment of the present utility model; not thereby scope of patent protection of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (1)
1. a wide cut voltage stabilizing circuit, is characterized in that: comprise alternating current input and earth terminal, one end of alternating current input and electric capacity C9, one end of the primary coil of transformer T1, one end of resistance R3, one end of electric capacity C5 is connected with the Vi end of chip LM5021, and the other end of the primary coil of transformer T1 is connected with the drain electrode of field effect transistor Q1, and the grid of field effect transistor Q1 is held with the HO of chip LM5100a and is connected, the source electrode of field effect transistor Q1 and one end of inductance L 1, the drain electrode of field effect transistor Q2, one end of electric capacity C8 is connected with the HS end of chip LM5100a, and the other end of electric capacity C8 holds with the HB of chip LM5100a and the negative pole of diode D4 is connected, the positive pole of diode D4 and one end of electric capacity C10, the vdd terminal of chip LM5100a, the negative pole of diode D1, the VCC end of chip LM5021 is connected with one end of electric capacity C6, the CMP end of chip LM5021 and one end of electric capacity C4, one end of resistance R6 connects, and the other end of resistance R6 is connected with one end of electric capacity C3, the other end of electric capacity C3 and the other end of electric capacity C4, the Vf end of chip LM5021, one end of resistance R11 is connected with one end of resistance R10, and the UV end of chip LM5021 is connected with one end of resistance R2, and the other end of resistance R2 is connected with one end of resistance R1, the CS end of chip LM5021 and one end of electric capacity C2, one end of resistance R5 connects, the other end of resistance R5 and the negative pole of diode D2, one end of resistance R7 connects, one end of the secondary coil of the positive pole of diode D2 and one end of resistance R8 and transformer T1 is connected, the Rt end of chip LM5021 is connected with one end of resistance R4, the Vss end of chip LM5021 is connected with one end of electric capacity C1, the out end of chip LM5021 is held with the Vin of chip LM5100a and is connected, the Rt end of chip LM5100a is connected with one end of R9, and the LO end of chip LM5100a is connected with the grid of field effect transistor Q2, the other end of resistance R11 and the negative pole of voltage-stabiliser tube D3A, one end of electric capacity C7, the other end of inductance L 1, the positive pole of diode D1 is connected with circuit output end, the other end of earth terminal and electric capacity C6, the other end of electric capacity C2, the other end of electric capacity C1, the other end of electric capacity C5, the other end of electric capacity C9, the other end of electric capacity C7, the other end of electric capacity C10, the other end of resistance R3, the other end of resistance R1, the other end of resistance R4, the other end of resistance R7, the other end of resistance R8, the other end of resistance R9, the other end of resistance R10, the other end of resistance R, the other end of the secondary coil of transformer T1, the GND end of chip LM5100a, the GND end of chip LM5021, the source electrode of field effect transistor Q2 is connected with the positive pole of voltage-stabiliser tube D3A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520545292.7U CN204886733U (en) | 2015-07-25 | 2015-07-25 | Broad width voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520545292.7U CN204886733U (en) | 2015-07-25 | 2015-07-25 | Broad width voltage stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204886733U true CN204886733U (en) | 2015-12-16 |
Family
ID=54831053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520545292.7U Expired - Fee Related CN204886733U (en) | 2015-07-25 | 2015-07-25 | Broad width voltage stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204886733U (en) |
-
2015
- 2015-07-25 CN CN201520545292.7U patent/CN204886733U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203289323U (en) | Power supply circuit and switching power supply | |
| CN109149978A (en) | The reverse exciting switching voltage regulator of super wide voltage output controls chip power supply circuit | |
| CN204886733U (en) | Broad width voltage stabilizing circuit | |
| CN203278658U (en) | switching power supply circuit | |
| CN202906742U (en) | Fly-back power source with power factor correction function | |
| CN104967334A (en) | Novel balanced modulation type trilinear buffer driving multi-path output voltage-stabilized power supply | |
| CN104467442A (en) | Double-input isolation power circuit | |
| CN205693566U (en) | The output circuit of two-way switch power supply | |
| CN203554296U (en) | Power supply module for servo driver, and servo driver | |
| CN103414349A (en) | Servo driver power module and servo driver | |
| CN204145816U (en) | Buck high power factor constant current driving circuit | |
| CN104968088A (en) | Grid driving system used for LED lamp protection system based on boost voltage stabilizing circuit | |
| CN203056968U (en) | Power supply circuit | |
| CN102332834A (en) | High Efficiency Low Harmonic AC/DC Converter | |
| CN202737766U (en) | Large power adjustable direct current voltage stabilization power supply | |
| CN202931615U (en) | LED step-down drive circuit and television | |
| CN203827186U (en) | DC equal-proportion isolating power supply | |
| CN103997222A (en) | DC equal ratio isolated power supply | |
| CN104935194A (en) | Non-linear negative feedback switching voltage-stabilized power supply based on constant current protection | |
| CN104578845A (en) | Driving power supply | |
| CN202679252U (en) | Self-excitation push-pull oscillating circuit | |
| CN203522538U (en) | Adjustable DC voltage-stabilizing power circuit | |
| CN204334355U (en) | A Wide Input Isolated Triple Output Switching Power Supply | |
| CN205142020U (en) | Invertion power supply and contravariant welding machine | |
| CN204145299U (en) | A kind of constant current DC-DC electric pressure converter control circuit |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20160725 |