CN211044056U - Voltage clamping circuit applied to multi-output power supply - Google Patents
Voltage clamping circuit applied to multi-output power supply Download PDFInfo
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- CN211044056U CN211044056U CN201921981291.1U CN201921981291U CN211044056U CN 211044056 U CN211044056 U CN 211044056U CN 201921981291 U CN201921981291 U CN 201921981291U CN 211044056 U CN211044056 U CN 211044056U
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Abstract
The utility model discloses a be applied to multiplexed output power's voltage clamp circuit, including diode ZD1, resistance R1, resistance R2 and resistance R3, diode ZD1 first end is regarded as voltage clamp circuit's input (connection multiplexed output power's output), diode ZD1 second end is connected resistance R1 one end, resistance R2 one end and resistance R3 one end, the resistance R1 other end, the resistance R2 other end and the ground connection of the resistance R3 other end. When the output voltage is higher than the normal voltage, the utility model is automatically connected with the load, so that the output voltage is controlled in the normal range; when the output voltage is normal voltage, the load is automatically disconnected, the output voltage is kept normal, and the power supply efficiency is improved; when the output voltage is lower than the normal voltage, the load is automatically disconnected, and the output voltage cannot further drop.
Description
Technical Field
The utility model relates to a multiplexed output power field, in particular to be applied to multiplexed output power's voltage clamping circuit.
Background
The problem that the output voltage of a light load or no load path rises to exceed the standard range due to cross load of the conventional multi-path output power supply is solved, so that a certain amount of load needs to be added to the output end of the power supply, and the voltage of the output end is controlled to be not beyond the standard range. In addition, in a single-output power supply, many power controllers work in an intermittent mode in order to reduce standby power consumption, and at the moment, the control output voltage of the power supply is unstable, and a certain amount of load needs to be added to the output end of the power supply in order to improve the no-load voltage. However, loading the output terminal presents another conflicting problem, which is to cause a reduction in power supply efficiency. Because the current domestic and international markets have the requirements on standby power consumption of electronic products, products which do not reach the standard cannot enter the market, and the standby power consumption of electrical appliances such as televisions, computers, set top boxes and the like is required to be below 0.5W.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a be applied to multichannel output power's voltage clamp circuit has improved the standby efficiency of power, has solved the voltage problem on the high side that cross load caused.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a voltage clamping circuit applied to a multi-output power supply comprises a diode ZD1, a resistor R1, a resistor R2 and a resistor R3, wherein a first end of the diode ZD1 is used as an input end of the voltage clamping circuit, a second end of the diode ZD1 is connected with one end of a resistor R1, one end of a resistor R2 and one end of a resistor R3, and the other end of the resistor R1, the other end of the resistor R2 and the other end of the resistor R3 are grounded.
Preferably, the diode ZD1 is a zener diode.
Preferably, when the output end of the multi-output power supply is a positive voltage, the first end of the diode ZD1 is a cathode, and the second end is an anode.
Preferably, when the output end of the multi-output power supply is a negative voltage, the first end of the diode ZD1 is an anode, and the second end is a cathode.
Preferably, the resistor R1 is a load resistor.
Preferably, the resistor R2 is a load resistor.
Preferably, the resistor R3 is a load resistor.
After the structure is adopted, when the output voltage is higher than the normal voltage, the utility model is automatically connected with the load, so that the output voltage is controlled within the normal range; when the output voltage is normal voltage, the load is automatically disconnected, the output voltage is kept normal, and the power supply efficiency is improved; when the output voltage is lower than the normal voltage, the load is automatically disconnected, and the output voltage cannot further drop.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
Fig. 1 is a schematic block diagram of the circuit of the multi-output power supply of the present invention when the output terminal is positive voltage;
FIG. 2 is a schematic block diagram of the circuit of the multi-output power supply of the present invention when the output terminal is negative voltage;
fig. 3 is a schematic block diagram of a circuit applied to a multi-output power supply of the present invention.
Detailed Description
The utility model discloses a be applied to multiplexed output power's voltage clamp circuit, including diode ZD1, resistance R1, resistance R2 and resistance R3, diode ZD1 first end is regarded as voltage clamp circuit's input (connection multiplexed output power's output), diode ZD1 second end is connected resistance R1 one end, resistance R2 one end and resistance R3 one end, the resistance R1 other end, the resistance R2 other end and the ground connection of the resistance R3 other end.
Preferably, the diode ZD1 is a zener diode.
When the output end of the multi-output power supply is a positive voltage, as shown in fig. 1, the voltage clamp circuit applied to the multi-output power supply disclosed in this embodiment includes a diode ZD1, a resistor R1, a resistor R2, and a resistor R3, the cathode of the diode ZD1 is used as the input end of the voltage clamp circuit (connected to the output end of the multi-output power supply), the anode of the diode ZD1 is connected to one end of the resistor R1, one end of the resistor R2, and one end of the resistor R3, and the other end of the resistor R1, the other end of the resistor R2, and the other end of the resistor R3 are.
When the output end of the multi-output power supply is a negative voltage, as shown in fig. 2, the voltage clamp circuit applied to the multi-output power supply disclosed in this embodiment includes a diode ZD1, a resistor R1, a resistor R2, and a resistor R3, an anode of the diode ZD1 is used as an input end (connected to the output end of the multi-output power supply) of the voltage clamp circuit, a cathode of the diode ZD1 is connected to one end of the resistor R1, one end of the resistor R2, and one end of the resistor R3, and the other end of the resistor R1, the other end of the resistor R2, and the other end of the resistor R3.
Preferably, the resistor R1 is a load resistor, the resistor R2 is a load resistor, and the resistor R3 is a load resistor.
When the output voltage reaches the upper limit of the normal voltage, the voltage stabilizing tube is broken down to switch on the load (the resistor R1, the resistor R2 and the resistor R3), and the output voltage is suppressed to be controlled within a normal range. When the output voltage is normal, the load is not carried, when the voltage is increased, the load is automatically carried, the clamping output voltage does not exceed the normal voltage range, and when the voltage is normal, the load is not carried, so that the standby efficiency of the power supply is improved.
In a multi-output power source (e.g., a computer power source), when a bias load is tested, the relevant voltage will appear in a seesaw form, as shown in fig. 3, the output is +12V, +5V, -12V, when +12V is heavy load, -12V and 5V are light and heavy, the voltage of-12V and +5V will appear a phenomenon of voltage over-voltage, the voltage clamp circuit of-12V and the voltage clamp circuit of +5V will automatically turn on the clamp output voltage, the voltage of +12V will appear a phenomenon of voltage low, the voltage clamp circuit of +12V will automatically turn off the clamp load output voltage, reduce the output voltage decrease and improve the power efficiency.
Or when-12V and +5V are heavy load and +12V is light load, the voltage of +12V will be over high, the voltage clamping circuit of 12V will automatically switch on the clamping output voltage, the voltage of-12V and +5V will be low, the voltage clamping circuit of-12V and the voltage clamping circuit of +5V will automatically switch off to reduce the reduction of the output voltage and improve the power efficiency.
Or when +12V and +5V are heavy load and-12V is light load, the voltage of-12V will be over high, the voltage clamping circuit of-12V will automatically switch on the clamping output voltage, the voltage of +12V and +5V will be low, the voltage clamping circuit of +12V and the voltage clamping circuit of +5V will automatically switch off, the reduction of output voltage is reduced and the power efficiency is improved.
In summary, the output end of the +12V voltage, +5V voltage and-12V voltage is connected with a voltage clamping circuit, and when the output voltage is higher, the load is automatically clamped and is connected to control the voltage within a normal range; when the output voltage is low or in a normal range, the load is clamped automatically, the load is disconnected, and the output efficiency is improved.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.
Claims (7)
1. A voltage clamping circuit applied to a multi-output power supply is characterized in that: the voltage clamping circuit comprises a diode ZD1, a resistor R1, a resistor R2 and a resistor R3, wherein the first end of the diode ZD1 is used as the input end of the voltage clamping circuit, the second end of the diode ZD1 is connected with one end of a resistor R1, one end of a resistor R2 and one end of a resistor R3, and the other end of the resistor R1, the other end of the resistor R2 and the other end of the resistor R3 are grounded.
2. The voltage clamp circuit for a multiple output power supply of claim 1, wherein: the diode ZD1 is a zener diode.
3. The voltage clamp circuit for a multiple output power supply of claim 1, wherein: when the output end of the multi-path output power supply is at a positive voltage, the first end of the diode ZD1 is a cathode, and the second end of the diode ZD1 is an anode.
4. The voltage clamp circuit for a multiple output power supply of claim 1, wherein: when the output end of the multi-path output power supply is negative voltage, the first end of the diode ZD1 is an anode, and the second end is a cathode.
5. The voltage clamp circuit for a multiple output power supply of claim 1, wherein: the resistor R1 is a load resistor.
6. The voltage clamp circuit for a multiple output power supply of claim 1, wherein: the resistor R2 is a load resistor.
7. The voltage clamp circuit for a multiple output power supply of claim 1, wherein: the resistor R3 is a load resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921981291.1U CN211044056U (en) | 2019-11-17 | 2019-11-17 | Voltage clamping circuit applied to multi-output power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921981291.1U CN211044056U (en) | 2019-11-17 | 2019-11-17 | Voltage clamping circuit applied to multi-output power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211044056U true CN211044056U (en) | 2020-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921981291.1U Active CN211044056U (en) | 2019-11-17 | 2019-11-17 | Voltage clamping circuit applied to multi-output power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211044056U (en) |
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2019
- 2019-11-17 CN CN201921981291.1U patent/CN211044056U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A voltage clamp circuit for multi output power supply Effective date of registration: 20210625 Granted publication date: 20200717 Pledgee: Xiamen Huli District Financing Guarantee Co.,Ltd. Pledgor: XIAMEN CASTEC ELECTRONIC INDUSTRY Co.,Ltd. Registration number: Y2021980005256 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| CP03 | Change of name, title or address |
Address after: 361000 unit 201, 46 Siming Industrial Park, Meixi Road, Tong'an District, Xiamen City, Fujian Province Patentee after: Xiamen Kesite Electronics Co.,Ltd. Country or region after: China Address before: 361000 unit 201, 46 Siming Industrial Park, Meixi Road, Tong'an District, Xiamen City, Fujian Province Patentee before: XIAMEN CASTEC ELECTRONIC INDUSTRY Co.,Ltd. Country or region before: China |