CN114285269A - Miniaturized power module based on three-way parallel microcrystalline device - Google Patents
Miniaturized power module based on three-way parallel microcrystalline device Download PDFInfo
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- CN114285269A CN114285269A CN202111623796.2A CN202111623796A CN114285269A CN 114285269 A CN114285269 A CN 114285269A CN 202111623796 A CN202111623796 A CN 202111623796A CN 114285269 A CN114285269 A CN 114285269A
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Abstract
The invention discloses a miniaturized power module based on three paths of parallel microcrystalline devices, which comprises an external clock, a radio following circuit, a first microcrystalline device sub-module, a second microcrystalline device sub-module and a third microcrystalline device sub-module, wherein the three microcrystalline device sub-modules are connected in parallel and adopt a working mode of 1 master and 2 slave; the external clock is connected to one end of the three microcrystalline device sub-modules which are connected in parallel, and the emitter follower circuit is connected to the other end of the three microcrystalline device sub-modules in parallel. The invention increases the parallel connection quantity of the microcrystalline devices, improves the maximum output current of the microcrystalline devices and provides sufficient energy for the electronic devices.
Description
Technical Field
The invention belongs to the field of power supplies, and particularly relates to a miniaturized power module based on three paths of parallel microcrystalline devices.
Background
In recent years, electronic equipment is developed towards 'small size, light weight and high integration', and a micro-crystal device miniaturized power module is an energy source for working of many electronic devices and provides stable voltage and enough current for various electronic devices. Sometimes, the electronic device needs a load current larger than the rated current of a single power supply module, and a common solution is to make two microcrystalline devices work synchronously by using internal clocks of the microcrystalline devices and adopting a parallel connection mode. The disadvantage is that the electronic device can not be realized if larger working current is needed, and only other types of power supply modules with larger volume, more complex assembly and heavier mass can be selected.
Disclosure of Invention
The invention aims to provide a miniaturized power module based on three paths of parallel microcrystalline devices, which is used for further connecting a plurality of microcrystalline devices in parallel to provide full current under the condition that rated current provided by a single microcrystalline device or a double microcrystalline device cannot meet the use requirement.
The technical solution for realizing the invention is as follows: a miniaturized power module based on three paths of parallel microcrystalline devices comprises an external clock, an emitter follower circuit, a first microcrystalline device sub-module, a second microcrystalline device sub-module and a third microcrystalline device sub-module, wherein the three microcrystalline device sub-modules are connected in parallel and adopt a working mode of 1 master and 2 slave; the external clock is connected to one end of the three microcrystalline device sub-modules which are connected in parallel, and the emitter follower circuit is connected to the other end of the three microcrystalline device sub-modules in parallel.
Compared with the prior art, the invention has the remarkable advantages that: by increasing the parallel connection quantity of the microcrystalline devices, the maximum output current of the microcrystalline devices is improved, and the full energy is provided for the electronic devices.
Drawings
Fig. 1 is a block diagram of a miniaturized power module based on three-way parallel microcrystalline devices according to the present invention.
Fig. 2 is a circuit diagram of an external clock.
Fig. 3 is a circuit diagram of an emitter follower amplifier.
Fig. 4 is a circuit diagram of a microdevice sub-module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "connected," "secured," and the like are to be construed broadly, e.g., "secured" may be fixedly connected, releasably connected, or integral; "connected" may be mechanically or electrically connected. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the scope of the claimed invention.
The following further introduces specific embodiments, technical difficulties and inventions of the present invention with reference to the design examples.
With reference to fig. 1, the miniaturized power module based on three parallel micro-devices includes an external clock, an emitter follower circuit, a first micro-device sub-module, a second micro-device sub-module, and a third micro-device sub-module, the first micro-device sub-module ioutnon pin is connected to CTL pins of the second micro-device sub-module and the third micro-device sub-module through the emitter follower circuit, and the first micro-device sub-module, the second micro-device sub-module, and the third micro-device sub-module have the same structure.
As shown in fig. 2, the external clock circuit includes an oscillator N2, an eleventh resistor R11, a twelfth resistor R12, and an eleventh capacitor C11. An eleventh resistor R11 and a twelfth resistor R12 are connected in series between the V + pin and the SET pin of the oscillator N2, and an eleventh capacitor C11 is connected in series between the V + pin of the oscillator N2 and the ground. The oscillator LTC6902CMS8 is selected in the present invention for use as an external clock for three microdevice submodules. Suspending a PH pin of an oscillator N2 in order to set an oscillator LTC6902CMS8 to be in a three-way output mode, wherein the phase difference is 120 degrees; suspending the DIV pin of the oscillator N2 to make the internal frequency calculation coefficient N equal to 10; the SET pin is connected with a proper resistor and connected with a power supply end, and the selection of the resistance value determines the oscillation period inside the oscillator. The output ends OUT1, OUT2 and OUT3 are oscillation period output pins and are respectively connected with clock input pins Sync of the three microcrystalline device sub-modules.
The emitter follower circuit schematic is shown in fig. 3, and includes an operational amplifier N3 and a tenth capacitor C10. The tenth capacitor C10 is connected between the V + pin of the amplifier N3 and GND. The operational amplifier N3 of the present invention selects LT1636 to implement the emit-follow function. The IOUTMON pin of the first microcrystalline device submodule is connected with CTL pins of the second microcrystalline device submodule and the third microcrystalline device submodule through the emitter follower circuit, so that the microcrystalline device is in a one-master-two-slave working mode.
The three microdevice submodules have the same function, and the first microdevice submodule is taken as an example for explanation. Fig. 4 shows a schematic circuit diagram of a microcrystalline device sub-module, in which the microcrystalline device power module includes a switching power supply N1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, and a seventh capacitor C7. The first resistor R1 is connected between the pin VOUT of the output end VOUT of the switch power supply N1 and +28V, the second resistor R2 is connected between the pin RT of the switch power supply N1 and GND, the third resistor R3 is connected between the pins VOUT and FB of the switch power supply N1, the fourth resistor R4 and the fifth resistor R5 are connected between the pin FB of the switch power supply N1 and GND, the first capacitor C1 and the second capacitor C2 are connected between the pin VIN of the switch power supply N1 and GND, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 are connected between the pin VOUT and GND of the switch power supply N1, and the seventh capacitor C7 is connected between the pin MODE of the switch power supply N1 and GND.
In the invention, an LTM8055MPY microcrystalline device is selected as a core to build a circuit. The specific circuit connection mode is as follows: the Vin pin is an input pin, and the range of externally input voltage is 5V-36V; the SVin pin is an input end power supply control pin, when an input voltage VIN pin is less than 5V, the input voltage VIN pin needs an independent voltage more than 5V, the input voltage VIN pin is usually in short circuit with the VIN pin during design, and simultaneously 1 ceramic dielectric capacitor with low ESR is connected to the bottom for filtering; the Iin pin is an input current detection pin and is in short circuit with the Vin pin when the function is not used; the Run pin is a vector energy end and works when the Run pin is set at a high level, and the Run pin is normally short-circuited with the input pin Vin by the 2 pin; the SS pin is a soft start pin, the soft start time is controlled through the size of a capacitance value, and if the soft start requirement does not exist, the SS pin is kept in an open circuit state; the Sync pin is an external synchronous input pin, and the external clock is given to the switching power supply LTM8055MPY through the Sync pin; the COMP pin is a compensation pin, and is usually externally connected with a capacitor or an RC network; the Rt pin is a frequency control pin, the switching frequency of the switching power supply is controlled through a resistance value externally connected to the ground, and the resistance value is determined according to actual use. The LL pin is a light load indication pin, and can be connected to the ground under the condition that the function is not used; the MODE pin is a MODE switching pin, can select a light load MODE or a heavy load MODE, and is usually connected with the LL pin; the FB pin is an output voltage value adjusting pin, and the output voltage is adjusted through different resistance values of the ground resistor; the Vout butler is an output terminal pin and is directly connected with a load.
Example 1
Assuming that the battery voltage in a certain electronic equipment is between +24V to +36V, the stable voltage of +28V needs to be generated through the conversion of a secondary power supply, and the capacity of the load current 15A is also provided. In the invention, a microcrystalline device switching power supply LTM8055MPY of the American LINEAR company is selected as a core device for realizing the function. The single switching power supply LTM8055MPY can meet the requirement that the input voltage can stably output +28V voltage under the condition of 24V-36V, but the load current can only reach 6A, and the function can be realized by adopting a mode of connecting a plurality of microcrystalline devices in parallel.
The recommended design of the switching power supply LTM8055MPY only gives an example of parallel connection of two devices, and if the switching power supply can work synchronously, two parallel switching power supply clocks need to be kept synchronous, and the phase difference is 180 °. The CLKOUT pin of a single switching power supply LTM8055MPY just outputs a clock signal which is synchronous with the internal clock of the switching power supply LTM but has a phase difference of 180 degrees, and the clock signal can be used as an input clock by another switching power supply which is connected in parallel.
The invention requires 15A load current, and can meet the requirement only by using at least three switching power supplies LTM8055MPY in parallel. In order to enable the three switching power supplies LTM8055MPY to work synchronously, the clocks of the three switching power supplies need to be synchronous, and the phase difference is 120 degrees. The internal clock of the switching power supply LTM8055MPY is synchronous with the clock output by the CLKOUT pin, but the phase difference is 180 degrees, which cannot meet the use requirement.
In order to enable the three switching power supplies to be used in parallel, an external clock is required for synchronization, and a clock oscillator of the American LINEAR company LTC6902CMS8 is selected. The clock oscillator LTC6902CMS8 is put into a three-output mode, and each pin outputs a square wave with a phase difference of 120 ° and is provided to the clock pin of each switching power supply LTM8055 MPY.
The miniaturized power module based on the three paths of parallel microcrystalline devices comprises an external clock, an emitter follower circuit, a first microcrystalline device submodule, a second microcrystalline device submodule and a third microcrystalline device submodule, wherein the first microcrystalline device submodule, the second microcrystalline device submodule and the third microcrystalline device submodule have the same structure.
With reference to fig. 2, the external clock includes an oscillator N2, an eleventh resistor R11, a twelfth resistor R12, and an eleventh capacitor C11. In the invention, the oscillator LTC6902CMS8 is selected to be used for an external clock of a sub-module of a microcrystalline device. Suspending a PH pin of the oscillator LTC6902CMS8 in order to set the oscillator LTC6902CMS8 to be in a three-way output mode, wherein the phase difference is 120 degrees; suspending the DIV pin to make the internal frequency calculation coefficient N equal to 10; the SET pin is connected with a proper resistor and connected with a power supply end, and the selection of the resistance value determines the oscillation period inside the oscillator. The output terminals OUT1, OUT2, and OUT3 are oscillation period output pins, and are respectively connected to a clock input pin Sync of the microdevice.
With reference to fig. 3, the emitter follower circuit includes an operational amplifier N3 and a tenth capacitor C10. The operational amplifier LT1636 is selected to realize the emitter follower function in the invention. One microcrystalline device pin Ioutmon is connected to CTL pins of the other two microcrystalline devices through an operational amplifier N3, so that the microcrystalline devices are in a one-master-two-slave operation mode.
The three microdevice submodules have the same function, and the first microdevice submodule is taken as an example for explanation. The microcrystalline device submodule comprises a switching power supply N1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7. In the invention, an LTM8055MPY microcrystalline device is selected as a core to build a circuit. The specific circuit connection mode is as follows: the Vin pin of the switch power supply N1 is an input pin, and the range of externally input voltage is 5V-36V; the SVin pin is an input end power supply control pin, when an input voltage VIN pin is less than 5V, the input voltage VIN pin needs an independent voltage more than 5V, the input voltage VIN pin is usually in short circuit with the VIN pin during design, and simultaneously 1 ceramic dielectric capacitor with low ESR is connected to the bottom for filtering; the Iin pin is an input current detection pin and is in short circuit with the Vin pin when the function is not used; the Run pin is a vector energy end and works when the high level is set, and the Run pin is normally short-circuited with the input pin Vin by 2; the SS pin is a soft start pin, the soft start time is controlled through the size of a capacitance value, and if the soft start requirement does not exist, the SS pin is kept in an open circuit state; the Sync pin is an external synchronous input pin, and the external clock is given to the switching power supply LTM8055MPY through the Sync pin; the COMP pin is a compensation pin, and is usually externally connected with a capacitor or an RC network; the Rt pin is a frequency control pin, the switching frequency of the switching power supply is controlled through a resistance value externally connected to the ground, and the resistance value is determined according to actual use. The LL pin is a light load indication pin, and can be connected to the ground under the condition that the function is not used; the MODE pin is a MODE switching pin, can select a light load MODE or a heavy load MODE, and is usually connected with the LL pin; the FB pin is an output voltage value adjusting pin, and the output voltage is adjusted through different resistance values of the ground resistor; the Vout butler is an output terminal pin and is directly connected with a load.
Claims (7)
1. A miniaturized power module based on three routes of parallel connection microcrystalline devices is characterized in that: the micro-crystal device comprises an external clock, an emitter-follower circuit, a first micro-crystal device sub-module, a second micro-crystal device sub-module and a third micro-crystal device sub-module, wherein the three micro-crystal device sub-modules are connected in parallel and adopt a working mode of 1 master and 2 slaves; the external clock is connected to one end of the three microcrystalline device sub-modules which are connected in parallel, and the emitter follower circuit is connected to the other end of the three microcrystalline device sub-modules in parallel.
2. The miniaturized power module of claim 1 further comprising: the oscillator LTC6902CMS8 was chosen for external clocking of three microdevice sub-modules.
3. The miniaturized power module of claim 2 further comprising: the external clock comprises an oscillator N2, an eleventh resistor R11, a twelfth resistor R12 and an eleventh capacitor C11; an eleventh resistor R11 and a twelfth resistor R12 are connected in series between the V + pin and the SET pin of the oscillator N2, and an eleventh capacitor C11 is connected in series between the V + pin of the oscillator N2 and the ground;
suspending a PH pin of an oscillator N2 to enable the oscillator N2 to be in a three-way output mode, and the phase difference is 120 degrees; suspending the DIV pin of the oscillator N2 to make the internal frequency calculation coefficient N equal to 10; the SET pin of the oscillator N2 is connected with a proper resistor and is connected with a power supply end, and the selection of the resistance value determines the oscillation period in the oscillator; the output ends OUT1, OUT2 and OUT3 are oscillation period output pins and are respectively connected with clock input pins Sync of the three microcrystalline device sub-modules.
4. The miniaturized power module of claim 1 or 3 based on three-way parallel microcrystalline devices, wherein: the emitter follower circuit comprises an operational amplifier N3 and a tenth capacitor C10, the tenth capacitor C10 is connected between the V + pin of the amplifier N3 and GND, and the operational amplifier N3 selects LT1636 to realize emitter follower function; the IOUTMON pin of the first microcrystalline device submodule is connected with CTL pins of the second microcrystalline device submodule and the third microcrystalline device submodule through the emitter follower circuit, so that the microcrystalline device is in a one-master-two-slave working mode.
5. The miniaturized power module of claim 1 further comprising: the first microcrystalline device submodule, the second microcrystalline device submodule and the third microcrystalline device submodule have the same structure.
6. The miniaturized power module of claim 5 further comprising: the microcrystalline device submodule comprises a switching power supply N1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6 and a seventh capacitor C7; the first resistor R1 is connected between the pin VOUT of the output end VOUT of the switch power supply N1 and +28V, the second resistor R2 is connected between the pin RT of the switch power supply N1 and GND, the third resistor R3 is connected between the pins VOUT and FB of the switch power supply N1, the fourth resistor R4 and the fifth resistor R5 are connected between the pin FB of the switch power supply N1 and GND, the first capacitor C1 and the second capacitor C2 are connected between the pin VIN of the switch power supply N1 and GND, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 are connected between the pin VOUT and GND of the switch power supply N1, and the seventh capacitor C7 is connected between the pin MODE of the switch power supply N1 and GND.
7. The miniaturized power module of claim 6 further comprising: the Vin pin of the switch power supply N1 is an input pin, and the range of externally input voltage is 5V-36V; the SVin pin is an input end power supply control pin, when an input voltage VIN pin is less than 5V, the input voltage VIN pin needs an independent voltage more than 5V, the input voltage VIN pin is usually in short circuit with the VIN pin during design, and simultaneously 1 ceramic dielectric capacitor with low ESR is connected to the bottom for filtering; the Iin pin is an input current detection pin and is in short circuit with the Vin pin when the function is not used; the Run pin is a vector energy end and works when the high level is set, and the Run pin is normally short-circuited with the input pin Vin by 2; the SS pin is a soft start pin, the soft start time is controlled through the size of a capacitance value, and if the soft start requirement does not exist, the SS pin is kept in an open circuit state; the Sync pin is an external synchronous input pin, the COMP pin is a compensation pin, and the pin is externally connected with a capacitor or an RC network; the Rt pin is a frequency control pin, the switching frequency of the switching power supply is controlled through a resistance value externally connected to the ground, and the resistance value is determined according to actual use; the LL pin is a light load indication pin, and can be connected to the ground under the condition that the function is not used; the MODE pin is a MODE switching pin, is used for selecting a light load MODE or a heavy load MODE, and is usually connected with the LL pin; the FB pin is an output voltage value adjusting pin, and the output voltage is adjusted through different resistance values of the ground resistor; the Vout butler is an output terminal pin and is directly connected with a load.
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2021
- 2021-12-28 CN CN202111623796.2A patent/CN114285269A/en active Pending
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| CN202426568U (en) * | 2011-11-30 | 2012-09-12 | 张卫 | Microcrystal buffing device |
| US20190342123A1 (en) * | 2018-05-01 | 2019-11-07 | Linear Technology Holding Llc | Power over data lines system using pair of differential mode chokes for coupling dc voltage and attenuating common mode noise |
| CN111766812A (en) * | 2020-07-02 | 2020-10-13 | 山东建筑大学 | Mbus acquisition circuit based on 5G network |
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