Because the likelihood in communication equipment has course of hundreds PoL voltage, the output voltage that need of systematic framework division runs these electric course through a kind of simple method, sequential and the biggest allow electric current. Nowadays a lot of deep inferior processor of micron IC number asks their I/O voltage is elevatory before its kernel voltage. On the other hand, a lot of DSP ask their kernel voltage gets promotion before I/O. In addition, closing sequential also is indispensable. Accordingly, need of systematic framework division undertakes changing through a kind of light method in order to optimize systematic performance, it is the configuration with specific memory of every DC/DC converter, so that simplify,the design works.

 

And, manufacturer of most communication equipment is in of pressure drive next data that improve its system to take in and send out in large quantities rate and function, and add more functions and character. In the meantime, they also are facing the pressure that reduces systematic total power comsumption. For example, common challenge includes, to reduce total power comsumption, need reorder work flow and transfer operation the server that did not make full use of, make other server can be shut thereby. Want to satisfy these requirement, the power comsumption that understands terminal user facilities is very necessary. Accordingly, the system of digital report source control that passes appropriate design (DPSM) can provide power comsumption data to the user, help make well-advised the sources of energy management is decision-making.

 

A of DPSM main advantage was to reduced design cost to shorten appear on the market time. Want to develop complex much rail system efficiently, can make appliance has direct figure user interface (the full-scale development environment of GUI) . Support of this kind of system undertakes changing through GUI, is not to solder repair white line, because this also simplified,check inside circuit (ICT) is mixed circuit board is debugged. Another advantage is to be able to pass offerred real time telemetering to data forecasts breakdown of power source system and adopt precautionary measures. The most important perhaps is, the DC/DC converter that has digital management function allows to design personnel development to accord with target function (rate of computational speed, data) system of green power source, and utmost ground decreases to install the sources of energy that uses on the level even in laden dot, circuit board, frame, what reduce infrastructure cost and cycle of product service life thereby is total have cost. After all, the operation cost with data the biggest center is the electric power cost that is used at be cooling system power supply, the purpose is the optimal moving temperature that makes data center interior is booked under its.

 

In addition, systematic framework division still needs to use a few relatively simple power converter to satisfy the requirement of course of all sorts of other power supply on circuit board, but the circuit that sets these power supply course board the area is narrowing ceaselessly. Its part reason is cannot be in these converter outfit circuit board is bottom, there is many in be being configured because of frame installation circuit board is placed side by side, force its limitation of height of the biggest package is 2 Mm. What they want truly is the complete power source of a small size, install printed circuit board (2 Mm does not exceed after PCB) . Fortunately, this kind of solution exists really, the article will undertake more detailed discussion.

 

Converter solution

 

The Power By Linear of ADI company™µModule® manostat is complete systematization is enclosed (SiP) solution, but utmost ground shortens design time, the common circuit in solving communication system board space and power density problem. These µModule products are solution of complete power source government, in compact model the watch sticks BGA or LGA is enclosed inside package of transistor of compositive DC-DC controller, power, input and output electric capacity, compensation and inductance. It is OK to use product of Power By Linear µModule to undertake designing the time that needs place of process of the design that finish decreases amount to 50% , specific depend on the complex degree of the design. Series of this µModule manostat component type selecting, optimize and the design burden such as layout arrives from design personnel move on parts of an apparatus, shorten thereby whole designs time, reduce systematic breakdown, accelerate a product finally to appear on the market time.

 

These µModule solutions mix catenary of schism type power source, signal the commonly used crucial element in keeping apart a design is compositive in compact IC type in over all dimension. Below the support in flow of the test with strict Power By Linear and high reliability, our µModule range of products simplified power source management and the design that power changes and layout. This range of products covered wide application, include load to select product of charger of manostat, batteries, DPSM (PMBus number supervises power supply) , driver of diode of segregation type converter and LED glow. As tall compositive spend a solution and every parts of an apparatus offers PCB Gerber document, while these µModule power adjuster are satisfying time and dimensional restriction, offer efficient with high reliability. In addition, we a lot of newer products still can come true accord with EN 55022 B kind low EMI solution of the standard. This lets a system design personnel to be able to believe firmly terminal system will satisfy strict noise function criterion, a lot of occupation standard fighting a confusion of voices that accord with final system to must be satisfied thereby.

 

Moreover, as design resource because of systematic complexity rise and become nervous, attention falls on the development of systematic key intellectual property mainly. This often means power source to be put at the same time, the later period till development cycle just by attend to. Because time is very short, and natural resources of design of professional power source may be limited, because this urgent need development gives measure as far as possible small efficient solution, want to try to apply to the opposite of PCB at the same time, make dimensional utilization rate the oldest change.

 

This is the crucial domain that µModule manostat can offer good solution. This concept interior is complex, but the efficiency that exterior and simple —— has switch manostat already, have the easy design sex of linear manostat again. It is very important that layout of the design that is in charge of seriously, PCB and component choice are designed to switch manostat, a lot of experienced design personnel are on-the-job of career of course of study inchoate smelled circuit board flaming is distinctive fragrance. When short or experience of power source design is scant between at that time, off-the-peg µModule manostat can save time and space already, can reduce project risk again.

 

A of ultrathin µModule solution newest example is LTM4622. This is adjuster of step-down of a double 2.5 A or output of two-phase odd 5 A power, use 6.25 Mm×6.25 Mm×1.8 Mm ultrathin LGA is enclosed. Its are ultrathin approach 1206 crust size highly solder capacitance height, allow installation to be in the coping of circuit board. Ultrathin appearance makes it can satisfy slashing high restriction, for example PCIe and embedded the high limitation that the advanced interlining card in computational system asks, if pursue,1 is shown.

 

Graph 1.LTM4622A can install the bottom in PCB.

 

In addition, we still rolled out LTM4622A recently. Those who serve as LTM4622 is aberrant, this A version has 1.5 V the higher output voltage to 12 V, replace 0.6 V the blame A version to 5.5 V. Such, if terminal system needs, systematic design personnel can be in relatively high end has wider output voltage range. Below either circumstance, input voltage limits all comes for 3.6 V 20 V. Pass the µModule DC/DC manostat of Power By Linear, also can provide high power and DPSM function easily. Because manostat can be in a lot of µModule to tall load current issues paralell connection and provide accurate electricity,match (in respective of 1% nominal inside limits) , they can reduce the possibility of occurrence heat. In addition, only manostat of a µModule needs to include DPSM function, because although the others is shunt-wound,µModule parts of an apparatus is done not have inside buy DPSM function, it also can offer complete number port.

 

Graph 2. Combine parts of an apparatus of a LTM4677 DPSM µModule and manostat of 3 LTM4650 µModule can fall in 1 V from rated

 

12V input offers 186 A.

 

Parts of an apparatus of DPSM of have the aid of, the system designs personnel to be able to carry out a lot of different jobs, include:

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● configures voltage through digital communication bus line, the definition leaves complexly / close sequential to decorate, definition breakdown condition (if pass to press and be owed,press be restricted to be worth) , the power source parameter with main setting (if switch frequency, electric current is restricted,be worth etc) .

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● is on same communication bus line, can answer the working parameter with be read important, if input voltage and output voltage, input and output electric current, input and output power, interior and exterior temperature, and the sources of energy that measures place to use up in certain product.

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● individual can come true to make rich to the accurate closed circuit of the design the quantity checks, adjust power source voltage very exact level.

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Designs of these parts of an apparatus are ● own style parts of an apparatus. Once had been configured and use them power input, they can undertake deciding foreword to power source, adjust in laden dot very accurate voltage, monitoring voltage and electric current last while the breakdown that can configure in executive user runs program, equip blame is easy the out of service record that lose a sex implement, detecting the information that concerns power source system to the memory when breakdown.

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● DPSM parts of an apparatus is OK cascade, build the system of large power supply of be concerned with with compose. This comes true through bus line is being coordinated in order to have between the chip that linear velocity runs.

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They include ● the in-house NVM that is used at configuration of parts of an apparatus and function of out of service record.

 

These ● parts of an apparatus contain I2C/PMBus communication port, PMBus of use occupation standard commands collect is controlled and run power source system.

 

These ● PSM parts of an apparatus gets general LTpowerPlay®The support of GUI. LTpowerPlay is engineering degree GUI, be designed in what power source system considered when development and debug, and long-range client support.

 

Graph a LTM4677 that 2 corresponding ground showed to 180 A adds DPSM PoL solution (manostat of 36 A DPSM µModule) with 3 LTM4650 (manostat of 50 A µModule) shunt-wound applied principle graph.

 

Conclusion

 

If DPSM function and ultrathin appearance power are used to change parts of an apparatus in current communication equipment, personnel of power source design can pass simple and powerful means to convey high power output low the core voltage to 0.5 V, and the error of output of the biggest dc inside temperature limits is ±0.5% , can satisfy newest inferior the demand of the IC such as 20 Nm ASIC, GPU and FPGA. If be put in over all dimension to restrain, the μModule manostat that can use ultrathin external form (for example LTM4622A) , its installation is on circuit board hind over all dimension is less than 2 Mm, let originally unused bottom the use on group of circuit board space. This saved precious PCB area not only, and still increase the cooling amount that reduced place to need because of what whole runs efficiency.

 

Finally, µModule manostat is being used in communication equipment is very significant, because it can shorten significantly,debug time and raise utilization rate of circuit board area. From this aux will be able to reduces infrastructure cost, and of systematic lifecycle always have cost. This is planted to design and making this is double for the company of equipment and the firm that be installed in data center and use this kind of device win.

 

Author brief introduction

 

Tony Armstrong is the product sale chief inspector of branch of product of ADI company Power By Linear. He is in charge of power source is changed and managing a product from appear on the market all general affairs of stop production. Before joining ADI, tony is in Linear Technology (it is one share of ADI company now) , Siliconix Inc. , Semtech Corp. , the different position that Fairchild Semiconductors and Intel had held the position of sale, sale and operation respect. He is graduated from England Mancunian university, obtain applied maths (honorary) baccalaureate. Contact means: Anthony.armstrong@analog.com.