CN218768080U

CN218768080U - RC control power-on time sequence power supply circuit

Info

Publication number: CN218768080U
Application number: CN202222304145.3U
Authority: CN
Inventors: 史清林; 闫敏
Original assignee: Xiamen jiuhua communication equipment factory
Current assignee: Xiamen jiuhua communication equipment factory
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2023-03-28
Anticipated expiration: 2032-08-30

Abstract

An RC control power-on time sequence power supply circuit comprises a power supply interface circuit, a first power supply module circuit and an RC power-on time control circuit; the input end of the power interface circuit is connected with an external power supply, and the output end of the power interface circuit is connected to the power input end of the first power module; the first power supply module is provided with at least one path of power supply output; the RC power-on time control circuit is provided with a first control circuit, and the first control circuit is connected with the first power module to control the at least two paths of power outputs to realize delayed power-on.

Description

RC control power-on time sequence power supply circuit

Technical Field

The utility model relates to a power supply circuit field, especially a power sequence supply circuit on RC control.

Background

With the development of the communication electronic industry, more and more electronic devices emerge, the devices generally use various complex processors as core devices, the processors often need various different levels of level standards and strict power-on time sequences, and the characteristics also put higher requirements on power supply circuits, and the circuit design also tends to be integrated and intelligent.

In the prior art, a single voltage conversion chip is mostly adopted for providing stable voltage levels, a small-sized single chip microcomputer is additionally used for controlling power supply enabling for specific power-on sequence and power-on time, so that the whole circuit design is more complex, the design difficulty and later software development cost are increased, and the product design period and cost are improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an above-mentioned defect among the prior art is overcome to main aim at, provides a power time sequence power supply circuit on RC control, adopts power time sequence, power supply integrated design, simplifies outside logic control, realizes the intelligence power supply.

The utility model adopts the following technical scheme:

an RC control power-on sequence power supply circuit is characterized in that: the power supply circuit comprises a power supply interface circuit, a first power supply module circuit and an RC power-on time control circuit; the input end of the power interface circuit is connected with an external power supply, and the output end of the power interface circuit is connected to the power input end of the first power module; the first power supply module is provided with at least one path of power supply output; the RC power-on time control circuit is provided with a first control circuit, and the first control circuit is connected with the first power supply module to control the at least two paths of power supply outputs to realize delayed power-on.

Preferably, the first control circuit is an RC series circuit, and includes a resistor R641, a resistor R442, and a capacitor C879, where one end of the resistor R641 is connected to the RUN2 pin of the first power module, the other end of the resistor R641 is connected to one end of the resistor R442 and one end of the capacitor C879, the other end of the resistor R442 is connected to the INTVCC pin of the first power module, and the other end of the capacitor C879 is grounded.

Preferably, the enable signal of the RUN1 pin of the first power module is an external power input or other power control outputs.

Preferably, the system also comprises a second power supply module; the RC power-on time control circuit is also provided with a second control circuit, and the second control circuit is connected with the first power module and the second power module.

Preferably, the second control circuit is an RC series circuit, and includes a resistor R642, a resistor R440, and a capacitor C880, one end of the resistor R642 is connected to the enable end of the second power module, one end of the resistor R440 is connected to one end of the capacitor C880, the other end of the resistor R440 is connected to the INTVCC pin of the first power module, and the other end of the capacitor C880 is grounded.

Preferably, the first power supply module circuit is provided with a first power supply output end and a second power supply output end; the power supply further comprises a state indicating circuit, and the state indicating circuit is connected with the second power supply output end.

Preferably, the first power module is further provided with a first feedback end and a second feedback end, the first feedback end is connected with the first power output end, the second feedback end is connected with the second power output end,

preferably, the model of the first power module chip is LTM4620 or LTM4630.

Preferably, the power interface circuit adopts a 4-core DJ30J interface.

From the above description of the present invention, compared with the prior art, the present invention has the following advantages:

1. the utility model discloses a circuit, RC power-on time control circuit adopt RC series circuit, through the size that changes resistance R and electric capacity C value, control power module enable threshold value to this reaches the effect of the external output of control VOUT, and it can provide stable power supply output, can stably and the efficient carries out work.

2. The utility model discloses a circuit, to the electronic equipment of the high complicated circuit design of integrated level, carry out the adaptation design of power like PADs, handheld terminal, monitoring facilities, portable terminal etc. can satisfy most removal portable equipment's use, also be suitable for on the needs specific complex processing wares such as DSP, FPGA, ARM of going up the electric order occasion, do not need small-size singlechip or other MCU systems to go up the electric order and do special treatment.

3. The utility model discloses a circuit still is provided with status indication circuit, can indicate the power and stabilize the output effect, safe and reliable, and the design is retrencied.

Drawings

FIG. 1 is a circuit diagram of the present invention;

FIG. 2 is a power interface circuit;

FIG. 3 is a first power module circuit;

FIG. 4 is a RC power-on time control circuit;

fig. 5 is a state indicating circuit.

Detailed Description

The present invention is further described below in the following with reference to specific embodiments.

A power supply circuit with a power-on time sequence controlled by an RC comprises a power interface circuit, a first power module circuit and an RC power-on time control circuit; the input end of the power interface circuit is connected with an external power supply, and the output end of the power interface circuit is connected to the power input end of the first power supply module; the first power supply module is provided with at least one path of power supply output; the RC power-on time control circuit is provided with a first control circuit, and the first control circuit is connected with the first power module to control at least two paths of power outputs to realize delayed power-on.

In which, the power interface circuit can design a corresponding interface according to actual needs, and the purpose is to provide input voltage, in this embodiment, a DJ30J series 4-core interface can be adopted, see fig. 2.

The first source module circuit corresponding module is a core chip, and the specific chip model can be LTM4620 or LTM4630 by using D56. Referring to fig. 3, VIN of the first power module is identified as a power input interface, and a total of 32 pins are connected together to support a wide range of 4.5V-16V voltage input. The voltage output is divided into two paths, namely VOUT1 and VOUT2, which support two paths of independent output, 14 pins of VOUT1 and VOUT2 are respectively connected in parallel to form a first power output end and a second power output end to form two paths of output, each path of circuit reaches 13A, the output voltage is adjustable, the output voltage supports 0.6V-5.3V output, and two paths of power supply are provided for a rear-end load. When a large current output is needed, the two paths of power supply outputs can be connected in parallel for output use. And the VFB1 pin and the VFB2 pin are used as output voltage control inputs, and different voltage outputs are configured by externally connecting different resistance values.

The first power module is also provided with a first feedback end VOUTS1 and a second feedback end VOUTS2, a voltage feedback pin of the first feedback end VOUTS1 is connected to VOUTS1, and the second feedback end VOUT2 is connected to VOUTS2 through DIFOUT differential output after being connected with DIFFP input internal comparison, so that differential feedback is realized, and remote voltage feedback or internal self-feedback can be realized in the mode. The signal VCC _12P0 is used as the power input terminal of the first power module for externally connecting the pins 3 and 4 of the power interface circuit in fig. 2.

The COMP1 and COMP2 pins of the first power module are external compensation circuits, the INTVCC pin provides an internal 5V output, and a pull-up power supply is provided for a PGOOD state output of a power supply that needs to be enabled at a later stage, which may drive the power supply that needs to be enabled at the later stage, for example, the second power module. The TEMP pin is externally connected with a common resistor, and the internal temperature of the power module can be obtained by monitoring the voltage value of the TEMP pin.

Referring to fig. 4, the RC power-on time control circuit depends on a power module circuit, and the first control circuit is an RC series circuit and includes a resistor R641, a resistor R442, and a capacitor C879, one end of the resistor R641 is connected to the RUN2 pin of the first power module, the other end of the resistor R641 is connected to one end of the resistor R442 and one end of the capacitor C879, the other end of the resistor R442 is connected to the INTVCC pin of the first power module, and the other end of the capacitor C879 is grounded.

The network reference sign RUN2_ EN is connected to the RUN2 pin of the first power module through the resistor R641, and the network reference sign 3p3v _okis connected to the enable pin of the next power module through the resistor R642, and is used as the other back-end power enable signal.

Furthermore, the power supply device also comprises a second power supply module, namely the second power supply module is used as a next-stage power supply module. The RC power-on time control circuit is also provided with a second control circuit, and the second control circuit is connected with the first power supply module and the second power supply module. Specifically, the second control circuit is an RC series circuit, and includes a resistor R642, a resistor R440, and a capacitor C880, one end of the resistor R642 is also connected to the enable end of the second power module, one end of the resistor R440, and one end of the capacitor C880, the other end of the resistor R440 is connected to the INTVCC pin of the first power module, and the other end of the capacitor C880 is grounded. The network label 3P3V _OKis connected with the next-stage power supply enabling pin through a resistor R642 and is used as a back-end other power supply enabling signal.

As shown in fig. 3, the network label EXT _ EN of the first power module, that is, the enable signal of the RUN1 pin is the external power input or the enable signal of the other power control output is the external power input or the other power control output. The RUN2_ EN enable signal is an output signal of the second power module PGOOD1, a 5V power supply is provided through INTVCC to pull up, and the capacitor in the RC series circuit has a charging effect, so that the RUN2_ EN enable signal has a slow step pull-up effect, and the specific pull-up time can be determined according to a product value of the capacitor and the resistance value, thereby obtaining a delayed power-up effect.

Referring to fig. 5, the present invention further comprises a status indicating circuit, and the status indicating circuit is connected to the second power output terminal. Specifically, the state indicating circuit mainly displays the VOUT2 output voltage state of the first power module, whether voltage output exists or not is represented by selecting 3.3V-grade LED lamps, meanwhile, the first way of VOUT1 output is normal on the premise of voltage output, the whole work of the circuit can be reflected, and two ways of output states are not required to be indicated by two LED lamps.

The utility model discloses a circuit, RC power-on time control circuit adopt RC series circuit, through the size that changes resistance R and electric capacity C value, control power module enables the threshold value to this reaches the external effect of exporting of control VOUT. The power supply device can provide stable power supply output, can work stably and efficiently, can meet the use requirements of most mobile portable equipment, is suitable for complex processor fields such as a DSP (digital signal processor), an FPGA (field programmable gate array) and an ARM (advanced RISC machine) which need specific power-on sequences, and does not need a small-sized single chip microcomputer or other MCU (microprogrammed control unit) systems to carry out special processing on the power-on sequences. In addition, the power supply is further provided with a state indicating circuit, the stable output effect of the power supply can be prompted, the power supply is safe and reliable, and the design is simple.

The aforesaid is only the embodiment of the present invention, but the design concept of the present invention is not limited to this, and it is right to utilize this concept the present invention to perform insubstantial modification, and all belong to infringement the protection scope of the present invention.

Claims

1. An RC control power-on sequence power supply circuit is characterized in that: the power supply circuit comprises a power supply interface circuit, a first power supply module circuit and an RC power-on time control circuit; the input end of the power interface circuit is connected with an external power supply, and the output end of the power interface circuit is connected to the power input end of the first power module; the first power supply module is provided with at least two paths of power supply outputs; the RC power-on time control circuit is provided with a first control circuit, and the first control circuit is connected with the first power module to control the at least two paths of power outputs to realize delayed power-on.

2. The RC-controlled power-on sequence supply circuit of claim 1, wherein: the first control circuit is an RC series circuit, and includes a resistor R641, a resistor R442, and a capacitor C879, where one end of the resistor R641 is connected to the RUN2 pin of the first power module, the other end of the resistor R641 is connected to one end of the resistor R442 and one end of the capacitor C879, the other end of the resistor R442 is connected to the INTVCC pin of the first power module, and the other end of the capacitor C879 is grounded.

3. The RC-controlled power-on sequence supply circuit of claim 1, wherein: and an enabling signal of the RUN1 pin of the first power module is an external power supply input or other power supply control outputs.

4. The RC-controlled power-on sequence supply circuit of claim 1, wherein: the device also comprises a second power supply module; the RC power-on time control circuit is also provided with a second control circuit, and the second control circuit is connected with the first power supply module and the second power supply module.

5. The RC-controlled power-on sequence supply circuit of claim 4, wherein: the second control circuit is an RC series circuit, and includes a resistor R642, a resistor R440, and a capacitor C880, where one end of the resistor R642 is connected to an enable end of the second power module, one end of the resistor R440 is connected to one end of the capacitor C880, the other end of the resistor R440 is connected to an INTVCC pin of the first power module, and the other end of the capacitor C880 is grounded.

6. The RC-controlled power-on sequence supply circuit of claim 1, wherein: the first power supply module circuit is provided with a first power supply output end and a second power supply output end; the power supply further comprises a state indicating circuit, and the state indicating circuit is connected with the second power supply output end.

7. The RC-controlled power-on sequence supply circuit of claim 6, wherein: the first power supply module is further provided with a first feedback end and a second feedback end, the first feedback end is connected with the first power supply output end, and the second feedback end is connected with the second power supply output end.

8. The RC-controlled power-on sequence supply circuit of claim 1, wherein: the first power module chip is of the LTM4620 or LTM4630 model.

9. The RC-controlled power-on sequence supply circuit of claim 1, wherein: the power interface circuit adopts a 4-core DJ30J interface.