CN205490137U - Low -cost power sequential circuit - Google Patents
Low -cost power sequential circuit Download PDFInfo
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- CN205490137U CN205490137U CN201620258630.3U CN201620258630U CN205490137U CN 205490137 U CN205490137 U CN 205490137U CN 201620258630 U CN201620258630 U CN 201620258630U CN 205490137 U CN205490137 U CN 205490137U
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Abstract
The utility model discloses a low -cost power sequential circuit, including DC power supply, DC DC source transformation ware no. 1, DC DC source transformation ware no. 2 and DC the DC source transformation ware three, DC DC source transformation ware no. 1, DC DC source transformation ware no. 2 and DC it can input port EN to be equipped with input port IN, output port OUT and messenger in the DC source transformation ware no. 3 respectively, wherein, and DC still be equipped with PGOOD output port in the DC source transformation ware no. 2, does DC power supply connect DC input port IN on the DC source transformation ware no. 1 with make can input port EN, DC the output port OUT of DC source transformation ware no. 1 respectively with DC DC source transformation ware no. 2 and DC input port IN on the DC source transformation ware no. 3 links to each other, DC does the output port OUT of DC source transformation ware no. 2 connect a power supply circuit 1, DC does output port OUT on the DC source transformation ware no. 3 connect a power supply circuit 2, at DC PGOOD output port on the DC source transformation ware no. 2 still connects a RC and postpones the module, this RC postpone module respectively with power supply circuit 1 and DC messenger on the DC source transformation ware no. 3 can link to each other by output port 0EN. The operation of this circuit is simple, safe and reliable, with low costs, save circuit board space.
Description
Technical field
This utility model relates to power supply sequencing contro field, is specially a kind of low cost power supply sequence circuit.
Background technology
In electronic product, multiple power supplies usually can be used to power by certain sequential, the electrifying timing sequence of such as kernel and IO, common methods is to use special time schedule controller to carry out electrifying timing sequence control, in circuit design, generally it is input to multiple power supplies in time schedule controller carry out sequencing contro, but in timing intervals time and the rise time of powering on less demanding particular power source change-over circuit, when the method realizes, different power supplys supplies electricity to different modules, need to be concentrated by power supply before power supply, it is unfavorable for that the wiring of plate level power supply divides, add cost simultaneously.In order to solve the problems referred to above, this utility model provides a kind of low cost power supply sequence circuit, and this circuit runs simple, safe and reliable, low cost, saving circuit board space.
Summary of the invention
Technical problem to be solved in the utility model realizes by the following technical solutions:
nullA kind of low cost power supply sequence circuit，Including DC power supply、DC-DC power source changer one、DC-DC power source changer two and DC-DC power source changer three，Described DC-DC power source changer one、It is respectively equipped with input port IN in DC-DC power source changer two and DC-DC power source changer three、Output port OUT and enable input port EN，Wherein，PGOOD output port it is additionally provided with in DC-DC power source changer two，Described DC power supply connects the input port IN on DC-DC power source changer one and enables input port EN，The output port OUT of DC-DC power source changer one is connected with the input port IN on DC-DC power source changer two and DC-DC power source changer three respectively，The output port OUT of described DC-DC power source changer two connects a power circuit 1，Output port OUT on DC-DC power source changer three connects a power circuit 2，PGOOD output port on DC-DC power source changer two is also connected with a RC Postponement module，This RC Postponement module is connected with the enable input port EN on power circuit 1 and DC-DC power source changer three respectively.
Open-drain output circuit is further respectively had in described DC-DC power source changer one, DC-DC power source changer two.
Described power circuit 1 and power circuit 2 correspond to kernel power supply circuits and IO power supply circuits respectively.
Described DC power supply voltage after DC-DC power source changer one is changed into 5V.
The supply voltage of described kernel power supply circuits and IO power supply circuits is respectively 1.0V and 1.8V.
Described DC-DC power source changer two is LM21212ME-2 supply convertor, and described DC-DC power source changer three is TPS54328DDA supply convertor.
This utility model has the advantages that this power supply sequence circuit utilizes open-drain power supply instruction function in DC-DC power source changer, make when the supply convertor exception of input port IN or correspondence, can be in time by rear class power remove, simultaneously, RC Postponement module circuit can realize delay feature to kernel supply voltage and IO supply voltage, this power supply sequence circuit runs simple, safe and reliable, low cost, saving circuit board space, is applicable in timing intervals time and the rise time of powering on less demanding particular power source change-over circuit.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and be easy to understand with effect, this utility model is expanded on further below in conjunction with the accompanying drawings.
nullAs shown in Figure 1，A kind of low cost power supply sequence circuit，Including DC power supply、DC-DC power source changer one、DC-DC power source changer two and DC-DC power source changer three，Described DC-DC power source changer one、It is respectively equipped with input port IN in DC-DC power source changer two and DC-DC power source changer three、Output port OUT and enable input port EN，Wherein，PGOOD output port it is additionally provided with in DC-DC power source changer two，Described DC power supply connects the input port IN on DC-DC power source changer one and enables input port EN，The output port OUT of DC-DC power source changer one is connected with the input port IN on DC-DC power source changer two and DC-DC power source changer three respectively，The output port OUT of described DC-DC power source changer two connects a power circuit 1，Output port OUT on DC-DC power source changer three connects a power circuit 2，PGOOD output port on DC-DC power source changer two is also connected with a RC Postponement module，This RC Postponement module is connected with the enable input port EN on power circuit 1 and DC-DC power source changer three respectively.
It is additionally provided with open-drain output circuit in described DC-DC power source changer one, DC-DC power source changer two.
Described power circuit 1 and power circuit 2 correspond to kernel power supply circuits and IO power supply circuits respectively.
Described DC power supply voltage after DC-DC power source changer one is changed into 5V.
The supply voltage of described kernel power supply circuits and IO power supply circuits is respectively 1.0V and 1.8V.
This power supply sequence circuit utilizes open-drain power supply instruction function in DC-DC power source changer, make when the supply convertor exception of input port IN or correspondence, can be in time by rear class power remove, simultaneously, RC Postponement module circuit can realize delay feature to kernel supply voltage and IO supply voltage, this power supply sequence circuit runs simple, safe and reliable, low cost, saving circuit board space, is applicable in timing intervals time and the rise time of powering on less demanding particular power source change-over circuit.
Of the present utility model ultimate principle, principal character and advantage have more than been shown and described.Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description, principle of the present utility model is simply described; on the premise of without departing from this utility model spirit and scope; this utility model also has various changes and modifications, in the range of these changes and improvements both fall within claimed this utility model.This utility model claims scope and is defined by appending claims and equivalent thereof.
Claims (6)
- null1. a low cost power supply sequence circuit，Including DC power supply、DC-DC power source changer one、DC-DC power source changer two and DC-DC power source changer three，Described DC-DC power source changer one、It is respectively equipped with input port IN in DC-DC power source changer two and DC-DC power source changer three、Output port OUT and enable input port EN，It is characterized in that: in described DC-DC power source changer two, be additionally provided with PGOOD output port，Described DC power supply connects the input port IN on DC-DC power source changer one and enables input port EN，The output port OUT of DC-DC power source changer one is connected with the input port IN on DC-DC power source changer two and DC-DC power source changer three respectively，The output port OUT of described DC-DC power source changer two connects a power circuit 1，Output port OUT on DC-DC power source changer three connects a power circuit 2，PGOOD output port on DC-DC power source changer two is also connected with a RC Postponement module，This RC Postponement module is connected with the enable input port EN on power circuit 1 and DC-DC power source changer three respectively.
- A kind of low cost power supply sequence circuit, it is characterised in that: further respectively have open-drain output circuit in described DC-DC power source changer one, DC-DC power source changer two.
- A kind of low cost power supply sequence circuit the most according to claim 1 or claim 2, it is characterised in that: described DC power supply voltage after DC-DC power source changer one is changed into 5V.
- A kind of low cost power supply sequence circuit the most according to claim 1 or claim 2, it is characterised in that: described power circuit 1 and power circuit 2 correspond to kernel power supply circuits and IO power supply circuits respectively.
- A kind of low cost power supply sequence circuit, it is characterised in that: the supply voltage of described kernel power supply circuits and IO power supply circuits is respectively 1.0V and 1.8V.
- A kind of low cost power supply sequence circuit, it is characterised in that: described DC-DC power source changer two is LM21212ME-2 supply convertor, and described DC-DC power source changer three is TPS54328DDA supply convertor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258630.3U CN205490137U (en) | 2016-03-31 | 2016-03-31 | Low -cost power sequential circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620258630.3U CN205490137U (en) | 2016-03-31 | 2016-03-31 | Low -cost power sequential circuit |
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| Publication Number | Publication Date |
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| CN205490137U true CN205490137U (en) | 2016-08-17 |
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| CN201620258630.3U Active CN205490137U (en) | 2016-03-31 | 2016-03-31 | Low -cost power sequential circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431614A (en) * | 2020-03-31 | 2020-07-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| US11930455B2 (en) | 2019-05-16 | 2024-03-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for controlling network connection, terminal and non-transitory storage medium |
-
2016
- 2016-03-31 CN CN201620258630.3U patent/CN205490137U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11930455B2 (en) | 2019-05-16 | 2024-03-12 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for controlling network connection, terminal and non-transitory storage medium |
| CN111431614A (en) * | 2020-03-31 | 2020-07-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN111431614B (en) * | 2020-03-31 | 2023-02-28 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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