CN220985529U - Output soft start circuit of module power supply - Google Patents
Output soft start circuit of module power supply Download PDFInfo
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- CN220985529U CN220985529U CN202321907181.7U CN202321907181U CN220985529U CN 220985529 U CN220985529 U CN 220985529U CN 202321907181 U CN202321907181 U CN 202321907181U CN 220985529 U CN220985529 U CN 220985529U
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- power supply
- module power
- soft start
- series
- output
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- 230000000630 rising effect Effects 0.000 claims abstract description 10
- 230000001939 inductive effect Effects 0.000 abstract description 8
- 230000001965 increasing effect Effects 0.000 abstract description 3
- 208000031361 Hiccup Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses an output soft start circuit of a module power supply, which comprises D1, D2, C1, R4, Q3, VOUT, TRIM and GND, wherein the GND is connected with R4 in series, the R4 is connected with C1 in series, the C1 is connected with D2 in series, the D2 is connected with VOUT in series, the TRIM is connected with D1 in series, and the D1 is connected with Q3 in series. The output soft start circuit is added to the module power supply, the rising time of the module power supply is controlled to enable the inductive load to be in low power supply voltage when the module power supply is started, the load starting current is effectively inhibited, the rising time of the output voltage of the module power supply is increased to enable the inductive load such as a fan to be started in a low-voltage power supply stage, the requirement on the maximum output current of the module power supply is reduced, and the module power supply with lower power cost, lower volume and smaller size can be selected.
Description
Technical Field
The utility model relates to the field of control of power supply systems, in particular to an output soft start circuit of a module power supply.
Background
The output overcurrent protection mode of the module power supply mainly works intermittently in a hiccup mode, so that the module power supply can be prevented from being damaged by overstress when in output overload and short circuit, but the disadvantage of the hiccup mode overcurrent protection is that the time for tolerating overcurrent is usually tens of milliseconds; when inductive loads such as fans and motors are cold started, starting current which is more than 2 times of steady-state working current exists, the duration reaches the second level, when the inductive loads are driven by the selected module power supply, the rated output current of the module power supply is usually more than 3 times of the steady-state working current of the loads for meeting the requirement of the starting current, so that the module power supply is oversized in model selection size and overhigh in cost, and the output soft starting circuit of the module power supply is provided.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art and provides an output soft start circuit of a module power supply so as to solve the problems of the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an output soft start circuit of module power, includes D1, D2, C1, R4, Q3, VOUT, TRIM and GND, GND and R4 establish ties, R4 and C1 establish ties, C1 and D2 establish ties, D2 and VOUT establish ties, TRIM and D1 establish ties, D1 and Q3 establish ties.
As a preferable technical scheme of the utility model, the VOUT and GND are the positive and negative outputs of the module power supply.
As a preferable technical scheme of the utility model, the TRIM is an output voltage adjusting pin of a power supply, and the R4 and C1 are output voltage soft start rising time control devices.
As a preferable technical scheme of the utility model, the D2 is a soft start reset diode.
The beneficial effects of the utility model are as follows: the output soft start circuit is added to the module power supply, the rising time of the module power supply is controlled to enable the inductive load to be in low power supply voltage when the module power supply is started, the load starting current is effectively inhibited, the rising time of the output voltage of the module power supply is increased to enable the inductive load such as a fan to be started in a low-voltage power supply stage, the requirement on the maximum output current of the module power supply is reduced, and the module power supply with lower power cost, lower volume and smaller size can be selected.
Drawings
Fig. 1 is a circuit diagram of the present utility model.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
Examples: referring to fig. 1, the present utility model provides a technical solution: the utility model provides an output soft start circuit of module power, includes D1, D2, C1, R4, Q3, VOUT, TRIM and GND, GND and R4 establish ties, R4 and C1 establish ties, C1 and D2 establish ties, D2 and VOUT establish ties, TRIM and D1 establish ties, D1 and Q3 establish ties.
VOUT and GND are the positive and negative outputs of the module power supply; the TRIM is an output voltage adjusting pin of the power supply, and the R4 and the C1 are output voltage soft start rising time control devices; and D2 is a soft start reset diode.
An output soft start circuit of a module power supply is added with the output soft start circuit, so that the rising time of the module power supply is controlled to enable an inductive load to be in a low power supply voltage when the module power supply is started, and the load starting current is effectively inhibited; FIG. 1 shows a power soft start circuit of a module, VOUT and GND are positive and negative outputs of the module power, and TRIM is an output voltage adjustment pin of the module power; r4 and C1 are output voltage soft start rising time control devices, D2 is a soft start reset diode, output voltage VOUT rises when the module power supply is started, and when the Q3 conduction condition is met, Q3 is conducted and the TRIM pin voltage of the module power supply is raised so as to adjust the output voltage starting time of the module power supply; by increasing the rising time of the output voltage of the module power supply, the inductive loads such as fans are started in the low-voltage power supply stage, the requirement on the maximum output current of the module power supply is reduced, and the module power supply with lower power cost and smaller volume can be selected.
The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (4)
1. The utility model provides an output soft start circuit of module power, includes D1, D2, C1, R4, Q3, VOUT, TRIM and GND, its characterized in that: GND and R4 are connected in series, R4 and C1 are connected in series, C1 and D2 are connected in series, D2 and VOUT are connected in series, TRIM and D1 are connected in series, and D1 and Q3 are connected in series.
2. The output soft start circuit of a modular power supply of claim 1, wherein: and VOUT and GND are positive and negative outputs of the module power supply.
3. The output soft start circuit of a modular power supply of claim 1, wherein: the TRIM is an output voltage adjusting pin of the power supply, and the R4 and the C1 are output voltage soft start rising time control devices.
4. The output soft start circuit of a modular power supply of claim 1, wherein: and D2 is a soft start reset diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321907181.7U CN220985529U (en) | 2023-07-19 | 2023-07-19 | Output soft start circuit of module power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321907181.7U CN220985529U (en) | 2023-07-19 | 2023-07-19 | Output soft start circuit of module power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220985529U true CN220985529U (en) | 2024-05-17 |
Family
ID=91041165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321907181.7U Active CN220985529U (en) | 2023-07-19 | 2023-07-19 | Output soft start circuit of module power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220985529U (en) |
-
2023
- 2023-07-19 CN CN202321907181.7U patent/CN220985529U/en active Active
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| GR01 | Patent grant |