CN111290558A - A kind of server power supply and power supply method - Google Patents
A kind of server power supply and power supply method Download PDFInfo
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- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
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Abstract
Description
技术领域technical field
本发明属于服务器技术领域,具体涉及一种服务器供电电源及供电方法。The invention belongs to the technical field of servers, and in particular relates to a server power supply source and a power supply method.
背景技术Background technique
伴随云计算应用的发展,信息化逐渐覆盖到社会的各个领域。人们的日常工作生活越来越多的通过网络来进行交流,网络数据量也在不断增加。同时服务器系统需要搭配的配置也在增加,导致系统本身总的功率在不断增加。With the development of cloud computing applications, informatization has gradually covered all areas of society. People's daily work and life are increasingly communicated through the network, and the amount of network data is also increasing. At the same time, the configuration of the server system that needs to be matched is also increasing, resulting in the continuous increase of the total power of the system itself.
随着系统功率的不断增加,包括CPU、内存、GPU等的功耗越来越大,服务器电源的负载变得越来越大,所以服务器电源的带载能力就变得越来越重要,而由于服务器的整体大小无法随着功耗的增加而增大,导致服务器的功率密度越来越大,而其中的瓶颈就在于PCB这一部分。PCB板的通流能力是一定的,电流越大,PCB需要的大小就会越来越大,这是服务器功耗增大的最大瓶颈;同时,电流较大带来的另一个问题就是后级电压转化时,较大的电流使得后级电压转化效率偏低。With the continuous increase of system power, the power consumption of CPU, memory, GPU, etc. becomes larger and larger, and the load of server power supply becomes larger and larger, so the load capacity of server power supply becomes more and more important. Since the overall size of the server cannot be increased with the increase of power consumption, the power density of the server is increasing, and the bottleneck lies in the PCB part. The current capacity of the PCB board is certain. The larger the current, the larger the size of the PCB required. This is the biggest bottleneck for the increase of server power consumption. At the same time, another problem caused by the large current is the power of the rear stage. When the voltage is converted, the larger current makes the voltage conversion efficiency of the latter stage low.
目前的服务器供电架构都是通过PSU输出12V来供给到主板的PSU连接器,通过PSU连接器再分散给其他负载端来供电,包括CPU、内存、GPU等负载都需要输入12V来进行正常的供电。如果后端负载过大,会导致12V需要的电流非常大,也就是说PSU到负载端的电流会非常大。一方面大电流使得转换效率偏低,另一方面主板PCB的铜箔大小有限,导致此处PCB能通过的12V电流有限,从而最终导致服务器功率增加的瓶颈。The current server power supply architecture is to supply the PSU connector of the motherboard through the PSU output 12V, and then distribute the power to other loads through the PSU connector, including the CPU, memory, GPU and other loads need to input 12V for normal power supply . If the back-end load is too large, the current required by 12V will be very large, that is to say, the current from the PSU to the load end will be very large. On the one hand, the high current makes the conversion efficiency low, and on the other hand, the copper foil size of the motherboard PCB is limited, which leads to the limited 12V current that the PCB can pass here, which eventually leads to the bottleneck of server power increase.
发明内容SUMMARY OF THE INVENTION
针对现有技术的上述不足,本发明提供一种服务器供电电源及供电方法,以解决上述技术问题。In view of the above deficiencies of the prior art, the present invention provides a server power supply and a power supply method to solve the above technical problems.
本发明提供一种服务器供电电源,包括:The present invention provides a server power supply, comprising:
电压转换模块、控制器和多个降压电路,所述电压转换模块串联在PSU电源与主板之间,对所述PSU电源的输出电压进行升压;所述主板连接多个降压支路,实时降压支路上设置有降压电路;所述降压支路的输出端连接负载;A voltage conversion module, a controller and a plurality of step-down circuits, the voltage conversion module is connected in series between the PSU power supply and the main board, and boosts the output voltage of the PSU power supply; the main board is connected with a plurality of step-down branches, A step-down circuit is arranged on the real-time step-down branch; the output end of the step-down branch is connected to the load;
所述控制器的输入端分别连接主板输出端和降压支路输出端;所述控制器的输出端分别连接电压转换模块和降压电路。The input end of the controller is respectively connected to the main board output end and the step-down branch output end; the output end of the controller is respectively connected to the voltage conversion module and the step-down circuit.
进一步的,所述降压电路包括:Further, the step-down circuit includes:
MOS管、电感和二极管,所述MOS管的D极连接主板输出端,所述MOS管的s极连接电感;所述电感连接负载端;所述二极管的输出端连接MOS管的s极与电感之间的线路,所述二极管的输入端接地;所述MOS管的G极连接控制器的输出端。MOS tube, inductor and diode, the D pole of the MOS tube is connected to the output end of the main board, the s pole of the MOS tube is connected to the inductor; the inductor is connected to the load terminal; the output end of the diode is connected to the s pole of the MOS tube and the inductor The line between the two, the input end of the diode is grounded; the G pole of the MOS transistor is connected to the output end of the controller.
进一步的,所述MOS管为NMOS管;所述控制器采用DSP控制器。Further, the MOS tube is an NMOS tube; the controller adopts a DSP controller.
进一步的,所述电压转换模块包括变压电感和多个升压支路,所述升压支路包括升压电感、升压二极管、升压电容和升压MOS管;所述升压电感与所述变压电感相对;且所述升压电感一端连接升压二极管输入端,另一端接地线;所述升压二极管输出端连接升压MOS管的D极;所述升压MOS管的s极连接主板;所述升压MOS管的G极连接控制器;所述升压二极管的输出端通过升压电容连接地线;所述多个升压支路的升压电感圈数不同。Further, the voltage conversion module includes a transformer inductor and a plurality of booster branches, and the booster branch includes a booster inductor, a booster diode, a booster capacitor and a booster MOS transistor; the booster inductor and The transformer inductors are opposite; one end of the boost inductor is connected to the input end of the boost diode, and the other end is grounded; the output end of the boost diode is connected to the D pole of the boost MOS transistor; the s of the boost MOS transistor The pole is connected to the main board; the G pole of the boost MOS tube is connected to the controller; the output end of the boost diode is connected to the ground wire through the boost capacitor; the boost inductor turns of the multiple boost branches are different.
进一步的,所述电压转换模块的变压电感与PSU的连接回路上设有开关;且所述电压转换模块包括三个升压支路,所述三个升压支路的输出电压分别为24V、36V和48V。Further, a switch is provided on the connection loop between the transformer inductance of the voltage conversion module and the PSU; and the voltage conversion module includes three boosting branches, and the output voltages of the three boosting branches are 24V respectively. , 36V and 48V.
本发明还提供一种服务器电源供电方法,所述方法包括:The present invention also provides a server power supply method, the method comprising:
采集降压支路负载功率并计算负载总功率;Collect the load power of the buck branch and calculate the total load power;
根据所述负载总功率和主板电流限值计算输入电压;Calculate the input voltage according to the total load power and the motherboard current limit;
根据输入电压值匹配升压电路并启用所述匹配升压电路;matching the boost circuit according to the input voltage value and enabling the matching boost circuit;
根据所述输入电压和降压支路上负载的额定电压计算降压目标占空比;Calculate the buck target duty cycle according to the input voltage and the rated voltage of the load on the buck branch;
控制降压电路MOS管将支路的占空比调整为所述目标占空比,进而将输入电压降至所述负载额定电压。The MOS transistor of the step-down circuit is controlled to adjust the duty cycle of the branch to the target duty cycle, thereby reducing the input voltage to the rated load voltage.
进一步的,所述根据输入电压和降压支路上负载的额定电压计算降压目标占空比,包括:Further, calculating the step-down target duty cycle according to the input voltage and the rated voltage of the load on the step-down branch includes:
将所述负载额定电压值与所述输入电压之商作为目标占空比。The quotient of the rated voltage value of the load and the input voltage is used as the target duty cycle.
进一步的,所述通过降压电路将供电的占空比调整为所述负载占空比,包括:Further, adjusting the duty cycle of the power supply to the duty cycle of the load through the step-down circuit includes:
利用DSP根据所述负载占空比控制MOS管在供电一个频率周期内的通断时间比例。The DSP is used to control the on-off time ratio of the MOS tube within one frequency cycle of the power supply according to the duty cycle of the load.
进一步的,所述方法还包括:Further, the method also includes:
根据所述升压支路的升压输出值设置各升压支路的升压范围;setting the boosting range of each boosting branch according to the boosting output value of the boosting branch;
建立升压支路MOS管设备码与升压支路的升压范围之间的映射关系;Establish a mapping relationship between the MOS tube device code of the boost branch and the boost range of the boost branch;
建立同一降压支路下的MOS管设备号与负载设备码的映射关系,并录入负载设备码对应的额定电压。Establish the mapping relationship between the MOS tube device number and the load device code under the same step-down branch, and enter the rated voltage corresponding to the load device code.
进一步的,所述根据输入电压值匹配升压电路并启用所述匹配升压电路,包括:Further, matching the boost circuit according to the input voltage value and enabling the matching boost circuit includes:
获取所述输入电压值所属的升压范围;obtaining the boost range to which the input voltage value belongs;
根据所属升压范围获取相应升压支路MOS管设备码;Obtain the corresponding boost branch MOS tube device code according to the boost range;
根据所述相应升压支路MOS管设备码控制所述相应升压支路MOS管联通。The communication of the corresponding booster branch MOS transistors is controlled according to the corresponding booster branch MOS transistor device code.
本发明的有益效果在于,The beneficial effect of the present invention is that,
本发明提供一种服务器供电电源及供电方法,根据负载功率调整主板输入电压,通过采用高压电源提高供电电压,从而降低服务器主板的电流,并通过降压电路将负载供电电压降至负载额定电压,实现高压电源对服务器的正常供电。本发明可解决主板通流瓶颈的问题,大大提升了服务器的带载能力;同时通过高压直接转化为负载所需要的电,还能够提高转换效率。The invention provides a server power supply and a power supply method. The main board input voltage is adjusted according to the load power, the supply voltage is increased by using a high-voltage power supply, thereby reducing the current of the server main board, and the load power supply voltage is reduced to the load rated voltage through a step-down circuit. Realize the normal power supply of the high-voltage power supply to the server. The invention can solve the problem of the main board flow bottleneck, greatly improve the load carrying capacity of the server; at the same time, the high voltage can be directly converted into the electricity required by the load, and the conversion efficiency can also be improved.
此外,本发明设计原理可靠,结构简单,具有非常广泛的应用前景。In addition, the present invention has reliable design principle and simple structure, and has a very wide application prospect.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,对于本领域普通技术人员而言,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. In other words, other drawings can also be obtained based on these drawings without creative labor.
图1是本申请一个实施例的装置的结构示意图。FIG. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
图2是本申请一个实施例的装置的结构示意图。FIG. 2 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本发明中的技术方案,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都应当属于本发明保护的范围。In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
需要说明的是,在不冲突的情况下,本发明中的实施例及实施例中的特征可以相互组合。It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.
在本发明的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以通过具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.
本发明涉及的名词解释如下:The terms involved in the present invention are explained as follows:
DSP(digital singnal processor)是一种独特的微处理器,是以数字信号来处理大量信息的器件。其工作原理是接收模拟信号,转换为0或1的数字信号,再对数字信号进行修改、删除、强化,并在其他系统芯片中把数字数据解译回模拟数据或实际环境格式。DSP (digital singnal processor) is a unique microprocessor, a device that processes a large amount of information with digital signals. Its working principle is to receive an analog signal, convert it into a digital signal of 0 or 1, and then modify, delete, strengthen the digital signal, and interpret the digital data back to analog data or actual environment format in other SoCs.
BUCK降压电路是常见的降压变换电路,基本结构左下:开关导通时等效电路;右下:开关关断时等效电路。The buck step-down circuit is a common step-down conversion circuit. The basic structure is the lower left: the equivalent circuit when the switch is turned on; the lower right: the equivalent circuit when the switch is turned off.
下面将参考附图并结合实施例来详细说明本发明。The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
实施例1Example 1
请参考图1,本实施例提供一种服务器供电电源,包括:Referring to FIG. 1, this embodiment provides a power supply for a server, including:
电压转换模块、控制器和多个降压电路,电压转换模块串联在PSU电源与主板之间,对PSU电源的输出电压进行升压;主板连接多个降压支路,实时降压支路上设置有降压电路;降压支路的输出端连接负载;A voltage conversion module, a controller and multiple step-down circuits. The voltage conversion module is connected in series between the PSU power supply and the main board to boost the output voltage of the PSU power supply; the main board is connected to multiple step-down branches, which are set on the real-time step-down branch. There is a step-down circuit; the output end of the step-down branch is connected to the load;
控制器的输入端分别连接主板输出端和降压支路输出端;控制器的输出端分别连接电压转换模块和降压电路。负载包括:CPU、内存、PCH以及GPU等。The input end of the controller is respectively connected to the main board output end and the step-down branch output end; the output end of the controller is respectively connected to the voltage conversion module and the step-down circuit. Loads include: CPU, memory, PCH, and GPU, etc.
本实施例中电压转换模块为变压器,可以将PSU电源电压升高,且升高值由控制器控制决定。In this embodiment, the voltage conversion module is a transformer, which can boost the PSU power supply voltage, and the boost value is determined by the controller.
现有服务器供电电压通常为12V,本实施例采用24V供电电压,然后通过降压电路将24V供电电压转换为2.4V负载电压为负载供电。降压电路采用常用的降压电路类型即可,例如buck降压电路。The power supply voltage of the existing server is usually 12V. In this embodiment, the power supply voltage of 24V is used, and then the 24V power supply voltage is converted into a 2.4V load voltage through a step-down circuit to supply power to the load. The step-down circuit can use a commonly used step-down circuit type, such as a buck step-down circuit.
如果服务器的功率为1200W,则服务器主板的输入端通过的电流:I=P/U=1200/24=50A,即主板的PCB需要支持50A的电流通过,而现有服务器电源产生的电流是100A。显然应用本实施例提供的电源,主板的通流能力只需要做到一半即可。可解决主板通流瓶颈的问题,大大提升了服务器的带载能力;同时通过高压直接转化为负载所需要的电,还能够提高转换效率。If the power of the server is 1200W, the current passing through the input end of the server motherboard: I=P/U=1200/24=50A, that is, the PCB of the motherboard needs to support the current passing through 50A, while the current generated by the existing server power supply is 100A . Obviously, by applying the power supply provided in this embodiment, the current-carrying capacity of the main board only needs to be half. It can solve the problem of the bottleneck of the main board flow, and greatly improve the load capacity of the server; at the same time, it can directly convert the electricity required by the load through high voltage, which can also improve the conversion efficiency.
实施例2Example 2
本实施例提供一种服务器供电电源,包括:This embodiment provides a server power supply, including:
电压转换模块、控制器和多个降压电路,电压转换模块串联在PSU电源与主板之间,对PSU电源的输出电压进行升压;主板连接多个降压支路,实时降压支路上设置有降压电路;降压支路的输出端连接负载;A voltage conversion module, a controller and multiple step-down circuits. The voltage conversion module is connected in series between the PSU power supply and the main board to boost the output voltage of the PSU power supply; the main board is connected to multiple step-down branches, which are set on the real-time step-down branch. There is a step-down circuit; the output end of the step-down branch is connected to the load;
控制器采用DSP,控制器的输出端分别连接电压转换模块和降压电路。The controller adopts DSP, and the output end of the controller is respectively connected to the voltage conversion module and the step-down circuit.
本实施例采用的降压电路如图2所示,包括:MOS管Q1、电感L1和二极管D1,所述MOS管Q1的D极连接降压电路的主板端,所述MOS管Q1的s极连接电感L1;所述电感L1连接降压电路的负载端;所述二极管D1的输出端连接MOS管Q1的s极与电感L1之间的线路,所述二极管D1的输入端接地,所述MOS管Q1的G极连接DSP的输出端。其中MOS管采用NMOS管。The step-down circuit used in this embodiment is shown in FIG. 2, and includes: a MOS transistor Q1, an inductor L1 and a diode D1. The D pole of the MOS transistor Q1 is connected to the main board end of the step-down circuit, and the s pole of the MOS transistor Q1 is connected to the main board. Connect the inductor L1; the inductor L1 is connected to the load end of the step-down circuit; the output end of the diode D1 is connected to the line between the s-pole of the MOS transistor Q1 and the inductor L1, the input end of the diode D1 is grounded, and the MOS The G pole of the tube Q1 is connected to the output end of the DSP. Among them, the MOS tube adopts NMOS tube.
本实施例提供的降压电路具有输入范围广的优点,即输入可以是24V,也可以更高。如:36V,48V等等,输入电压越高,则通过主板的电流越小,主板的带载能力就越强。因此即使高压电压输入的电压是动态的,本实施例提供的降压电路也可以最终输出一个定值低压。The step-down circuit provided in this embodiment has the advantage of a wide input range, that is, the input can be 24V or higher. Such as: 36V, 48V, etc., the higher the input voltage, the smaller the current through the motherboard, the stronger the load capacity of the motherboard. Therefore, even if the input voltage of the high voltage voltage is dynamic, the step-down circuit provided in this embodiment can finally output a constant value low voltage.
该降压电路的降压原理如下:The step-down principle of the step-down circuit is as follows:
DSP会采样检测VR输入端的电压值,经过内部计算处理,使得不同的输入电压对应不同的占空比,以此来调节NMOS管,保证输出稳定准确的后级电压来直接供给后端负载端。The DSP will sample and detect the voltage value of the VR input terminal, and through internal calculation and processing, different input voltages correspond to different duty ratios, so as to adjust the NMOS tube to ensure that the output stable and accurate post-stage voltage is directly supplied to the back-end load terminal.
当系统检测到输入电压≥12V时,系统开始工作,DSP通过采样电压值及内部计算,使得不同的输入电压对应不同的NMOS占空比,具体计算公式为:Vout=Vin*DWhen the system detects that the input voltage is greater than or equal to 12V, the system starts to work. The DSP makes different input voltages correspond to different NMOS duty cycles through sampling voltage values and internal calculations. The specific calculation formula is: Vout=Vin*D
例如:若检测到输入电压为24V,输出电压2.4V,则占空比D=Vout/Vin=2.4/24=0.1,即在一个周期内NMOS管的开通关断时间比例为10%,其他输入电压的计算方式一致。For example: if it is detected that the input voltage is 24V and the output voltage is 2.4V, the duty cycle D=Vout/Vin=2.4/24=0.1, that is, the ratio of the on-off time of the NMOS tube in one cycle is 10%, and the other input The voltage is calculated in the same way.
本实施例的电源转换模块包括变压电感和多个升压支路,本实施例采用3个升压支路,三个升压支路的电路结构相同。已其中一个升压支路为例,升压支路包括升压电感L2、升压二极管D2、升压电容C2和升压MOS管Q2;升压电感L2与变压电感L相对;且升压电感L2一端连接升压二极管D2输入端,另一端接地线;升压二极管D2输出端连接升压MOS管Q2的D极;升压MOS管Q2的s极连接主板;升压MOS管Q2的G极连接控制器DSP;升压二极管D2的输出端通过升压电容C2连接地线。多个升压支路的升压电感圈数不同,因此输出的电压值也不同,本实施例三个升压支路的输出电压分别为24V、36V和48V。The power conversion module of this embodiment includes a transformer inductor and a plurality of boosting branches. This embodiment adopts three boosting branches, and the circuit structures of the three boosting branches are the same. Taking one of the boosting branches as an example, the boosting branch includes a boosting inductor L2, a boosting diode D2, a boosting capacitor C2 and a boosting MOS transistor Q2; the boosting inductor L2 is opposite to the transformer inductor L; and the boosting One end of the inductor L2 is connected to the input end of the boost diode D2, and the other end is grounded; the output end of the boost diode D2 is connected to the D pole of the boost MOS transistor Q2; the s pole of the boost MOS transistor Q2 is connected to the motherboard; the G of the boost MOS transistor Q2 The pole is connected to the controller DSP; the output end of the boost diode D2 is connected to the ground wire through the boost capacitor C2. The number of boost inductor turns of the multiple boosting branches is different, so the output voltage values are also different. The output voltages of the three boosting branches in this embodiment are 24V, 36V and 48V respectively.
实施例3Example 3
本实施例提供一种服务器电源供电方法,所述方法包括:This embodiment provides a server power supply method, and the method includes:
S1、采集降压支路负载功率并计算负载总功率。S1. Collect the load power of the step-down branch and calculate the total load power.
DSP采集每个降压支路的电压值和电流值,得到支路负载功率,计算所有负载功率之和即为负载总功率。The DSP collects the voltage value and current value of each step-down branch, obtains the branch load power, and calculates the sum of all load powers as the total load power.
S2、根据所述负载总功率和主板电流限值计算输入电压。S2. Calculate the input voltage according to the total load power and the motherboard current limit.
获取服务器PCB主板的适用电流(由主板决定),如为50A。输入电压值为负载总功率除以适用电流。由于服务器负载可能是变动的,所述输入电压也会随之发生变化,因此需要实时采集服务器当前输入电压。Obtain the applicable current of the server PCB motherboard (determined by the motherboard), such as 50A. The input voltage value is the total load power divided by the applicable current. Since the server load may vary, the input voltage will also change accordingly, so it is necessary to collect the current input voltage of the server in real time.
S3、根据输入电压值匹配升压电路并启用所述匹配升压电路。S3. Match the booster circuit according to the input voltage value and enable the matched booster circuit.
根据根据升压支路的升压输出值设置各升压支路的升压范围,例如本实施例中升压支路1的升压范围为12V-24V,升压支路2的升压范围为24V-36V,升压支路3的升压范围为36V-48V。在DSP中存储升压支路MOS管设备码与升压支路的升压范围之间的映射关系The boosting range of each boosting branch is set according to the boosting output value of the boosting branch. For example, in this embodiment, the boosting range of boosting branch 1 is 12V-24V, and the boosting range of boosting branch 2 is It is 24V-36V, and the boost range of boost branch 3 is 36V-48V. Store the mapping relationship between the boost branch MOS tube device code and the boost range of the boost branch in the DSP
假设输入电压值为30V,则选用升压支路2,控制器DSP利用映射关系控制升压支路2的MOS管流通(另外两条升压支路MOS管保持断开状态)。Assuming that the input voltage value is 30V, the booster branch 2 is selected, and the controller DSP uses the mapping relationship to control the flow of the MOS transistors of the booster branch 2 (the other two booster branch MOS transistors remain disconnected).
S4、根据所述输入电压和降压支路上负载的额定电压计算降压目标占空比。S4. Calculate the step-down target duty cycle according to the input voltage and the rated voltage of the load on the step-down branch.
建立同一降压支路下的MOS管设备号与负载设备码的映射关系,并录入负载设备码对应的额定电压。Establish the mapping relationship between the MOS tube device number and the load device code under the same step-down branch, and enter the rated voltage corresponding to the load device code.
负载额定电压值与当前输入电压值之商即为负载占空比,将负载占空比标记所属负载设备码。The quotient of the load rated voltage value and the current input voltage value is the load duty cycle, and the load duty cycle is marked with the load device code to which it belongs.
S5、控制降压电路MOS管将支路的占空比调整为所述目标占空比,进而将输入电压降至所述负载额定电压。S5 , controlling the MOS transistor of the step-down circuit to adjust the duty cycle of the branch to the target duty cycle, thereby reducing the input voltage to the rated load voltage.
根据MOS管设备号与负载设备码的映射关系和负载占空比标记的负载设备码,控制相应MOS管将供电占空比设置为负载占空比。According to the mapping relationship between the MOS tube device number and the load device code and the load device code marked by the load duty cycle, the corresponding MOS tube is controlled to set the power supply duty cycle as the load duty cycle.
尽管通过参考附图并结合优选实施例的方式对本发明进行了详细描述,但本发明并不限于此。在不脱离本发明的精神和实质的前提下,本领域普通技术人员可以对本发明的实施例进行各种等效的修改或替换,而这些修改或替换都应在本发明的涵盖范围内/任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应所述以权利要求的保护范围为准。Although the present invention has been described in detail in conjunction with the preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all fall within the scope of the present invention/any Those skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should all be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
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