CN101895191A - Method for designing high-power and high-reliability server power supply by using modular power supply - Google Patents

Abstract

The invention provides a method for designing a high-power and high-reliability server power supply by using a modular power supply. The method comprises the following steps of: 1) replacing a conventional printed circuit board (PCB) by a metal substrate in a brick-type DC-DC modular power supply, dissipating heat in a thermal conduction mode by using the metal substrate to save a fan and eliminate noises; 2) using surface mounting technology (SMT) capacitors including a multilayer ceramic capacitor and a tantalum capacitor in the brick-type DC-DC modular power supply to save an electrolytic capacitor, enhance reliability, reduce size and ensure that the brick-type DC-DC modular power supply runs at the temperature of between 55 DEG C below zero and 85 DEG C due to the saving of the electrolytic capacitor; and 3) filtering alternating current of 220V by using a filter, converting the filtered alternating current into high-voltage direct current by using a rectifier bridge, converting the brick-type DC-DC modular power supply input by the high-voltage direct current into intermediate direct current bus voltage of 48V and Standby voltage, converting the input brick-type DC-DC modular power supply of 48V into various voltages needed by a system, setting a control unit, controlling the time sequence of each path of output and providing various monitoring signals.

Description

Method of designing high-power and high-reliability server power supply with modular power supply

technical field

The invention relates to a computer power supply design technology, in particular to a method for designing a high-power and high-reliability server power supply with a modular power supply.

Background technique

In the field of servers, AC-DC server power supplies are the most widely used. At present, this kind of power supply is mostly designed with discrete components, with a fan installed inside, and the heat is dissipated by forced convection, which makes a lot of noise, and uses a lot of electrolytic capacitors, resulting in a large volume of the entire power supply and low reliability. This type of power supply has a very narrow operating temperature range and can only work within the range of -10°C to +50°C. In view of the above problems, the present invention proposes a method of designing a high-reliability server power supply using a modular power supply, using a highly reliable DC-DC module power supply, and designing a highly reliable AC-DC server power supply through the combination of different module power supplies.

Contents of the invention

The purpose of the present invention is to provide a method for designing a high-power and high-reliability server power supply with a modular power supply.

The purpose of the present invention is achieved in the following manner, including content as follows:

1) In the brick-type DC-DC module power supply, the metal substrate is used instead of the traditional PCB, and the heat is dissipated through the conduction heat dissipation of the metal substrate, so that there is no fan and no noise;

2) SMT capacitors are used inside the brick-type DC-DC module power supply, including multilayer ceramic capacitors and tantalum capacitors, to realize electrolytic capacitors, improve reliability, and reduce volume. The design of non-electrolytic capacitors ensures brick-type DC-DC module power supplies Work within the temperature range of -55°C to +85°C;

3) After the 220V AC is filtered by the filter, it is converted into high-voltage DC through the rectifier bridge, and the brick-type DC-DC module power supply input by the high-voltage DC is converted into 48V intermediate DC bus voltage and Standby voltage, and then passed through the 48V input brick The power supply of the type DC-DC module is converted into various voltages required by the system, and the control unit is set to control the timing of each output and provide various monitoring signals; the steps of power conversion are as follows:

The 220V AC is purified by the filter and rectified by the rectifier bridge and then converted to about 300V DC, and the 5VSB output is generated, which supplies power to the control unit at the same time as the external output. The control unit monitors the state of the input voltage. When the input voltage is within the allowable range, the external input voltage is normal. At the same time, it outputs signals to the on/off terminals of each module power supply, turns on each module power supply in turn according to a certain sequence, first converts 300Vdc to 48Vdc bus voltage, and then converts it to the 12Vdc required by the system through the DC-DC module power supply at the back end. 5Vdc and 3.3Vdc voltage, the control unit monitors each output, and when the output voltage is within the allowable range, it provides a normal output voltage signal to the outside, and the control unit provides a power-on/off signal to the outside, and remotely controls each output to meet the server’s demand for power.

The metal substrate is an aluminum substrate or a copper substrate.

The beneficial effects of the invention are: using a highly reliable DC-DC module power supply, and designing a highly reliable AC-DC server power supply through the combination of different module power supplies. The module power supply dissipates heat through conduction, which can realize the fanless design of the power supply and eliminate noise; the module power supply uses SMT capacitors inside, which has high reliability and can realize the design of the power supply without electrolytic capacitors; the module power supply has a wide temperature range, which can ensure that the power supply operates at a wider temperature Working within a wide range, meeting the needs of industrial-grade and even military-grade power supplies.

Description of drawings

Accompanying drawing 1 is a functional block diagram of designing a high-reliability server power supply with a modular power supply.

Detailed ways

Referring to the accompanying drawings, the content of the present invention will be described with specific examples below.

The specific content is: the brick type DC-DC module power supply uses a metal substrate (such as an aluminum substrate) instead of a traditional PCB, and uses conduction to dissipate heat through the metal substrate, without fans and noise. The brick type DC-DC module power supply uses SMT capacitors (multilayer ceramic capacitors, tantalum capacitors, etc.) inside, without electrolytic capacitors, with high reliability and small size. The non-electrolytic capacitor design ensures that the brick-type DC-DC module power supply can work in a wide temperature range, which can reach -40°C to +70°C, and even -55°C to +85°C. Therefore, after the 220V AC is filtered by the filter, it is converted into high-voltage DC through the rectifier bridge, and the high-voltage DC is converted into 48V intermediate DC bus voltage and Standby voltage through the high-voltage input brick-type DC-DC module power supply, and then through the 48V input brick The type DC-DC module power supply is converted to various voltages required by the system (such as 12V, 5V, etc.), and a control unit is set to control the timing of each output and provide various monitoring signals.

Embodiment: In the attached drawing 1, in the initial state, except for one path of 5VSB, the power supply of other DC-DC modules is turned off by default. The 220V AC is purified by the filter and rectified by the rectifier bridge and then converted to about 300V DC, and the 5VSB output is generated, which supplies power to the control unit at the same time as the external output. The control unit monitors the state of the input voltage. When the input voltage is within the allowable range, the external input voltage is normal. At the same time, it outputs signals to the on/off terminals of each module power supply, turns on each module power supply in turn according to a certain sequence, first converts 300Vdc to 48Vdc bus voltage, and then converts it to the 12Vdc required by the system through the DC-DC module power supply at the back end. 5Vdc and 3.3Vdc voltage. The control unit monitors each output, and when the output voltage is within the allowable range, it provides an output voltage normal signal to the outside. The control unit provides an on/off signal to the outside, and can remotely control each output. This can fully meet the server's demand for power supply. At the same time, due to the use of high-reliability brick-type module power supplies, it realizes a fanless design and no electrolytic capacitor design. It can work in a wide temperature range and greatly improve reliability. .

Claims (2)

1. with the method for modular power source designing high-power and high-reliability server power supply, it is characterized in that comprising theing contents are as follows:

1) in brick type DC-DC modular power source, uses metal substrate to replace traditional PCB, dispel the heat, realize no fan, noiselessness by metal substrate heat loss through conduction mode;

2) the inner SMT electric capacity that uses of brick type DC-DC modular power source, comprise multi-layer ceramic capacitance, tantalum electric capacity, realize no electrolytic capacitor, carry the high reliability height, reduce volume, no electrolytic capacitor design has guaranteed that brick type DC-DC modular power source works in-55 ℃ to+85 ℃ temperature range;

3) this with the 220V alternating current behind filter filtering, be converted to high voltage direct current by rectifier bridge, the brick type DC-DC modular power source of this high voltage direct current input is converted to 48V intermediate dc busbar voltage and Standby voltage, brick type DC-DC modular power source by the 48V input is converted to the various voltages that system needs again, and control unit is set, each road output is carried out sequencing control and various pilot signals is provided; The power supply step of converting is as follows:

The 220V alternating current is converted to 300V left and right sides direct current after filter purification and rectifier bridge rectification, 5VSB exports generation, it when externally exporting the control unit power supply, control unit monitoring input voltage state, input voltage is in allowed band the time, the input voltage normal signal externally is provided, on/off to each modular power source holds output signal simultaneously, open each modular power source successively according to certain sequential, after earlier 300Vdc being converted to the 48Vdc busbar voltage, the DC-DC modular power source by the rear end is converted to the 12Vdc that system needs, 5Vdc and 3.3Vdc voltage again, control unit is monitored each road output, output voltage externally provides the output voltage normal signal in allowed band the time, and control unit externally provides the switching on and shutting down signal, the demand of server to power supply satisfied in each road output of Long-distance Control.

2. the method with modular power source designed for greater reliability server power supply according to claim 1 is characterized in that metal substrate is aluminium base or copper base.

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