CN202978698U - Single-chip sequential reset multichannel integrated power supply circuit - Google Patents
Single-chip sequential reset multichannel integrated power supply circuit Download PDFInfo
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- CN202978698U CN202978698U CN 201220658942 CN201220658942U CN202978698U CN 202978698 U CN202978698 U CN 202978698U CN 201220658942 CN201220658942 CN 201220658942 CN 201220658942 U CN201220658942 U CN 201220658942U CN 202978698 U CN202978698 U CN 202978698U
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Abstract
The utility model relates to a single-chip sequential reset multichannel integrated power supply circuit. The single-chip sequential reset multichannel integrated power supply circuit comprises a power supply conversion chip, a power supplying power supply filter circuit and a sequential control circuit, wherein the sequential control circuit is connected with an enablement pin of the power supply conversion chip, the power supplying power supply filter circuit is connected with a power supply input end of the power supply conversion chip, and the sequential control circuit comprises a triode Q1, a triode Q2 and a characteristic capacitor C121. The sequential control circuit guarantees a power-up order to follow stack principles, and a time interval of nuclear voltage output and I/O voltage output can be changed by changing magnitude of the characteristic capacitor C121. The single-chip sequential reset multichannel integrated power supply circuit realizes independent power supplying of a digital power supply and a simulation power supply, meets requirements of linearity and low noise of a simulation circuit and has other properties of excellent filtering effect and electromagnetic compatibility, high integrated level, economic performance, multiple channels and low noise.
Description
Technical field
The utility model relates to a kind of economical power circuit, particularly a kind of novel single-chip sequential multi-channel integrated power circuit that resets.
Background technology
Digital Signal Processing (DSP) technology is the basis of the digital industry of current high-tech, and the TMS 320 series DSP chips of American TI Company have occupied the huge share in DSP market with its higher performance cost performance.TMS 320 series DSP chips have three large subfamily: TMS320C2000, TMS320C5000 and TMS320C6000.
The design of digital system power supply is an important component part of DSP application system design.In the middle of whole dsp system design, the design of power supply should be placed at last and complete.Only have and determine when other parts of whole system, and after the model of device all chosen, could obtain the specifying information of required power, electric current, voltage etc., thereby the device that the decision power-supply system should be chosen adopts suitable scheme to realize.
Power supply in existing dsp system is all kinds of a lot, but it can be divided into two large classes: digital power and analog power.During use, digital power and analog power are independently-powered, and usually, analog circuit is higher than digital circuit to the requirement of power supply, with guarantee analog circuit and the linearity, low noise.
Many power works not only need voltage conversion device, also need between analog power and digital power, simulation ground and digitally between add filter circuit, to reduce the noise on power supply.
The circuit design aspect, because the DSP operating frequency is more and more higher, miniaturization, encapsulation densification trend is obvious.In addition wiring, device distribution there is very strong EMC Requirements.
The dsp chip of some duplicate supply work requires the power supply timing of two power supplys to have successively, will manage to guarantee this electrifying timing sequence in power circuit.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of single-chip sequential multi-channel integrated power circuit that resets, to solve the existing problem of prior art and shortcoming, make circuit digital power supply and analog power independently-powered, sequential is controlled, filter effect is outstanding, Electro Magnetic Compatibility is outstanding, and integrated level is high.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of single-chip sequential multi-channel integrated power circuit that resets comprises power conversion chip, power supply filter circuit, sequential control circuit;
Described sequential control circuit is connected with the enable pin of power conversion chip, is used for controlling the power supply output timing of the power output end of power conversion chip, and enable pin ENSM2 enables, power conversion chip power output end out-put supply;
Described power supply filter circuit is connected with the power input of power conversion chip, in order to the noise of filtering power supply.
further, described sequential control circuit comprises triode Q1, triode Q2 and characteristic capacitance C121, the base stage of described triode Q2 connects divider resistance R19 and divider resistance R31, described characteristic capacitance C121 is in parallel with divider resistance R31, in order to control triode Q2 ON time, the collector electrode of described triode Q2 is connected with power supply by current-limiting resistance R 32, be connected with the base stage of triode Q1 by current-limiting resistance R65 simultaneously, the emitter of described triode Q1 directly connects power supply, the collector electrode of described triode Q1 is connected with the enable pin ENSW2 of power conversion chip, be connected to ground by current-limiting resistance R 33 simultaneously.
Further, the power output end of power conversion chip is connected with the noise shunt capacitance of filtering out-put supply.
The beneficial effects of the utility model are: filter circuit and shunt capacitance filtering multi-frequency composition switching noise are with level and smooth power supply noise, the sequential control circuit order of having guaranteed to power on is followed the storehouse principle, can change by the size that changes C121 the interval time of core voltage output and I/O Voltage-output.The present invention realize digital power and analog power independently-powered, satisfy the linearity, the low noise requirement of analog circuit, filter effect is outstanding, Electro Magnetic Compatibility is outstanding, integrated level is high, has the features such as economy, multichannel, low noise.
Description of drawings
Fig. 1 is the utility model single-chip sequential multi-channel integrated power circuit diagram that resets;
Fig. 2 is the utility model power supply filter circuit figure.
Embodiment
Below in conjunction with accompanying drawing, principle of the present utility model and feature are described, example only is used for explaining the utility model, is not be used to limiting scope of the present utility model.
As shown in Figure 1, power conversion chip U2 left side dotted line frame part A is sequential control circuit, comprises triode Q1, triode Q2, characteristic capacitance C121, and power conversion chip the right dotted line frame is two buck circuits.After the first via low voltage difference power enable pin PWREN of power conversion chip U2 enables, first via low voltage difference power supply LDO1 exports 3.3V, enable buck circuit BUCK1 output core voltage 1.2V, turn-on transistor Q2 after output 1.2V, follow turn-on transistor Q1, enable buck circuit BUCK2 output 3.3V voltage, guaranteed the correct electric sequence of DSP.The size of base stage shunt capacitance C121 by changing triode Q2 can change the interval time of core voltage output and I/O Voltage-output, after all voltages are all exported, low pulsed reset bit DSP of electrification reset pin (NPOP) output of NPOP power supply chip, thus guaranteed the correct electric sequence of each supply power voltage of DSP.
Fig. 2 is the power supply filter circuit, but filtering multi-frequency composition switching noise and ripple are with level and smooth power supply noise.
The above is only preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (3)
1. single-chip sequential multi-channel integrated power circuit that resets, is characterized in that, comprises power conversion chip, power supply filter circuit, sequential control circuit;
Described sequential control circuit is connected with the enable pin of power conversion chip, controls the power supply output timing of the power output end of power conversion chip;
Described power supply filter circuit is connected with the power input of power conversion chip.
2. a kind of single-chip sequential multi-channel integrated power circuit that resets according to claim 1, it is characterized in that, described sequential control circuit comprises triode Q1, triode Q2 and characteristic capacitance C121, the base stage of described triode Q2 connects divider resistance R19 and divider resistance R31, described characteristic capacitance C121 is in parallel with divider resistance R31, in order to control triode Q2 ON time, the collector electrode of described triode Q2 is connected with power supply by current-limiting resistance R32, be connected with the base stage of triode Q1 by current-limiting resistance R65 simultaneously, the emitter of described triode Q1 directly connects power supply, the collector electrode of described triode Q1 is connected with the enable pin of power conversion chip, be connected to ground by current-limiting resistance R33 simultaneously.
3. a kind of single-chip sequential multi-channel integrated power circuit that resets according to claim 1, is characterized in that, the power output end of described power conversion chip is connected with the noise shunt capacitance of filtering out-put supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220658942 CN202978698U (en) | 2012-12-04 | 2012-12-04 | Single-chip sequential reset multichannel integrated power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220658942 CN202978698U (en) | 2012-12-04 | 2012-12-04 | Single-chip sequential reset multichannel integrated power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202978698U true CN202978698U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220658942 Expired - Lifetime CN202978698U (en) | 2012-12-04 | 2012-12-04 | Single-chip sequential reset multichannel integrated power supply circuit |
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| CN (1) | CN202978698U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111782570A (en) * | 2020-06-05 | 2020-10-16 | 中国兵器工业集团第二一四研究所苏州研发中心 | Signal processing SiP module based on TMS320C6748 |
| CN113448413A (en) * | 2021-08-30 | 2021-09-28 | 辰芯科技有限公司 | Power-on reset device, power-on reset method, computer device and readable storage medium |
-
2012
- 2012-12-04 CN CN 201220658942 patent/CN202978698U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111782570A (en) * | 2020-06-05 | 2020-10-16 | 中国兵器工业集团第二一四研究所苏州研发中心 | Signal processing SiP module based on TMS320C6748 |
| CN113448413A (en) * | 2021-08-30 | 2021-09-28 | 辰芯科技有限公司 | Power-on reset device, power-on reset method, computer device and readable storage medium |
| CN113448413B (en) * | 2021-08-30 | 2021-11-30 | 辰芯科技有限公司 | Power-on reset device, power-on reset method, computer device and readable storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |