CN1967990A - 可变直流电压源 - Google Patents

可变直流电压源 Download PDF

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CN1967990A
CN1967990A CNA200510101540XA CN200510101540A CN1967990A CN 1967990 A CN1967990 A CN 1967990A CN A200510101540X A CNA200510101540X A CN A200510101540XA CN 200510101540 A CN200510101540 A CN 200510101540A CN 1967990 A CN1967990 A CN 1967990A
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voltage
resistance
variable
pin
rectifier
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郭恒祯
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to CNA200510101540XA priority Critical patent/CN1967990A/zh
Priority to US11/309,669 priority patent/US7339362B2/en
Publication of CN1967990A publication Critical patent/CN1967990A/zh
Pending legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C5/00—Details of stores covered by group G11C11/00
    • G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
    • G11C29/02—Detection or location of defective auxiliary circuits, e.g. defective refresh counters
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
    • G11C29/02—Detection or location of defective auxiliary circuits, e.g. defective refresh counters
    • G11C29/021—Detection or location of defective auxiliary circuits, e.g. defective refresh counters in voltage or current generators
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
    • G11C29/02—Detection or location of defective auxiliary circuits, e.g. defective refresh counters
    • G11C29/028—Detection or location of defective auxiliary circuits, e.g. defective refresh counters with adaption or trimming of parameters
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
    • G11C29/04—Detection or location of defective memory elements, e.g. cell constructio details, timing of test signals
    • G11C29/08—Functional testing, e.g. testing during refresh, power-on self testing [POST] or distributed testing
    • G11C29/12—Built-in arrangements for testing, e.g. built-in self testing [BIST] or interconnection details
    • G11C29/12005—Built-in arrangements for testing, e.g. built-in self testing [BIST] or interconnection details comprising voltage or current generators
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C5/00—Details of stores covered by group G11C11/00
    • G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
    • G11C5/147—Voltage reference generators, voltage or current regulators; Internally lowered supply levels; Compensation for voltage drops
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—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
    • 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
    • H02M3/155—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 using semiconductor devices only
    • H02M3/156—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 using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
  • Dc-Dc Converters (AREA)

Abstract

一种可变直流电压源，其包括一整流器及一特征电阻，所述整流器包括一电压输入引脚、一电压输出引脚及一调整引脚，所述特征电阻连接于所述电压输出引脚与调整引脚之间，所述可变直流电压源还包括一可调负载，所述调整引脚通过所述可调负载接地，通过改变所述可调负载的负载值即可改变所述整流器输出引脚的输出电压。所述可变直流电压源运用简单的整流器及一可调负载，即可达到可调直流电源供应器的工作效果，降低了芯片电压稳定度测试的成本，维持了测试过程的连贯性，保证了测试效率及测试结果的准确性。

Description

可变直流电压源
【技术领域】
本发明是关于一种直流电压源，尤指一种输出电压可调的可变直流电压源。
【背景技术】
在电子电路硬件设计完成后，通常会对电路的各种电气特性进行测试以验证硬件的可靠度，这种测试中包括一种芯片电压稳定度测试。在芯片电压稳定度测试中，向电路中各芯片输入的电压依照芯片的额定最大与最小电压范围分割成若干测试电压值，将所需测试的电压值输入芯片以验证电路的稳定性。在测试时需要一可显示输出电压数值的可调直流电源供应器(DCPOWER SUPPLY)为芯片供应电压，及依照测试进度断开电压源，手动调整上述可调直流电源供应器以获取所需的输入电压值。
参考图1，是现有电压整流器的电路图，所述电压整流器10包括一整流器12、一特征电阻RF1及一分压电阻RF2，所述特征电阻RF1与分压电阻RF2串联于所述整流器12的电压输出端2与地之间，所述整流器12的调整端1连接至特征电阻RF1与分压电阻RF2的连接点，所述电压输入端3与电压输出端2分别通过电容器C1和C2接地，以稳定电压。所述整流器通常采用LM1084芯片，由其芯片特性可知，所述输入电压为0～25V，特征电阻RF1的电阻值为125Ohm，特征电阻RF1上的基准电压VREF为1.25V，输出电压VOUT＝VREF*(1+RF2/RF1)，在测试一额定电压为3.3V的芯片时，取RF2的电阻值为205Ohm，则VOUT＝1.25V*(1+205/125)＝3.3V，即可满足需求。
然而现有的电压整流器10只能输出一个特定的输出电压，在芯片电压稳定度测试过程中，当芯片的测试电压需要改变时就需要手动断开电源，更换电压整流器10或改变电压整流器中的电阻RF2，以获得新的输出电压，这样就造成测试过程不能连贯，影响测试效率及测试结果的准确性，而可调直流电源供应器虽然输出电压可调，但其成本较高，且在改变输出电压时也需先行断电，造成测试过程不能连贯，影响测试效率及测试结果的准确性。
【发明内容】
鉴于以上内容，有必要提供一种低成本的，输出电压可调的可变直流电压源。
一种可变直流电压源，其包括一整流器及一特征电阻，所述整流器包括一电压输入引脚、一电压输出引脚及一调整引脚，所述特征电阻连接于所述电压输出引脚与调整引脚之间，所述可变直流电压源还包括一可调负载，所述调整引脚通过所述可调负载接地，通过改变所述可调负载的负载值即可改变所述整流器输出引脚的输出电压。
所述可变直流电压源运用简单的整流器及一可调负载，即可达到可调直流电源供应器的工作效果，降低了芯片电压稳定度测试的成本，维持了测试过程的连贯性，保证了测试效率及测试结果的准确性。
【附图说明】
下面参照附图结合实施方式对本发明作进一步的说明。
图1是现有电压整流器的电路图。
图2是本发明可变直流电压源较佳实施方式的电路图。
【具体实施方式】
参照图2，是本发明可变直流电压源较佳实施方式的电路图，所述可变直流电压源20包括一整流器22及一特征电阻R1，所述整流器22为一LM1084整流芯片，其包括一电压输入引脚VIN、一电压输出引脚VOUT及一调整引脚ADJ，所述特征电阻R1连接于所述电压输出引脚VOUT与调整引脚ADJ之间。
所述可变直流电压源20还包括一可调负载24，所述调整引脚ADJ通过所述可调负载24接地。所述可调负载24可为一变阻箱或其它阻值可调负载，在本较佳实施方式中所述可调负载24包括一选择开关242及一负载模块244，所述选择开关242为一六选一开关，所述负载模块包括6个电阻R2～R7，所述选择开关242一侧的端口与所述调整引脚ADJ连接，另一侧的六个端口分别通过所述电阻R2～R7接地，通过选择开关242的闭合即可控制电阻R2～R7选择性连接到整流器22的调整引脚ADJ，与调整引脚ADJ连接的电阻的阻值即为所述整流器22的负载值。
所述整流器22的调整引脚ADJ通过一电容器C1接地，电容器C1起稳压作用，电压输入引脚VIN通过两并联的电容器C2和C3接地，电压输出引脚通过两并联的电容器C4和C5接地，电容器C2～C5起稳压及过滤杂波作用。
由所述整流器22的芯片特性有：输入电压可在芯片最低驱动电压至25V内任意选取，特征电阻R1的阻值为125Ohm，特征电阻R1上的基准电压为1.25V，整流器的输出电压满足公式：
           输出电压＝1.25V*(1+负载值/125)
由于所述整流器22的输出电压即为所述可变直流电压源20的输出电压，所以所述可变直流电压源20的输出电压也满足上述公式，又由上述芯片特性公式可得：
           负载值＝125*(输出电压/125-1)
所以对应所需的输出电压，只需调整选择开关242，在负载模块244中选取阻值合适的电阻接入电路作为整流器22的负载以获取适当的负载值，即可得到所需的输出电压。
参考表1，为本发明可变直流电压源较佳实施方式中所述负载模块244中电阻R2～R7的阻值，及以其作为负载时对应的输出电压和适用的测试范围：
                表1  负载与输出电压对照表
  电阻   阻值   输出电压   测试电压(范围)
  R2   175Ohm   3.0V   3.3V(3.0V～3.6V)
  R3   205Ohm   3.3V
  R4   235Ohm   3.6V
  R5   350Ohm   4.75V   5V(4.75V～5.25V)
  R6   375Ohm   5.0V
  R7   400Ohm   5.25V
藉此，通过调整选择开关242改变所述整流器22的负载值，即可随时改变所述可变直流电压源20的输出电压，且在改变输出电压时只需改变选择开关242的闭合而无需先行断电，使其可以满足不同芯片电压稳定度测试的需要。
所述可变直流电压源20运用简单的整流器22及一可调负载24，即可达到可调直流电源供应器的工作效果，降低了芯片电压稳定度测试的成本，维持了测试过程的连贯性，保证了测试效率及测试结果的准确性。

Claims (6)

1.一种可变直流电压源，其包括一整流器及一特征电阻，所述整流器包括一电压输入引脚、一电压输出引脚及一调整引脚，所述特征电阻连接于所述电压输出引脚与调整引脚之间，其特征在于：所述可变直流电压源还包括一可调负载，所述调整引脚通过所述可调负载接地，通过改变所述可调负载的负载值即可改变所述整流器输出引脚的输出电压。
2.如权利要求1所述的可变直流电压源，其特征在于：所述可调负载为一变阻箱，调整所述变阻箱的阻值即可改变所述整流器的负载值。
3.如权利要求1所述的可变直流电压源，其特征在于：所述可调负载包括一选择开关及若干电阻，所述负载选择开关与所述电阻连接，控制所述电阻是否与所述整流器的调整引脚连接，通过所述负载选择开关与所述调整引脚连接的电阻的阻值即为所述整流器的负载值。
4.如权利要求2或3所述的可变直流电压源，其特征在于：所述整流器为一LM1084整流芯片，所述特征电阻的阻值为125欧姆。
5.如权利要求4所述的可变直流电压源，其特征在于：所述可变直流电压源的输出电压满足公式：输出电压＝1.25V*(1+负载值/125)。
6.如权利要求1所述的可变直流电压源，其特征在于：所述电压输入引脚和电压输出引脚均通过至少一电容器接地，所述调整引脚通过至少一电容器接地。
CNA200510101540XA 2005-11-18 2005-11-18 可变直流电压源 Pending CN1967990A (zh)

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CNA200510101540XA CN1967990A (zh) 2005-11-18 2005-11-18 可变直流电压源
US11/309,669 US7339362B2 (en) 2005-11-18 2006-09-08 Alterable DC power supply circuit

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CN103095124A (zh) * 2011-11-01 2013-05-08 现代摩比斯株式会社 低电压dc-dc转换器的输出电压调节装置
CN103427685A (zh) * 2012-05-24 2013-12-04 鸿富锦精密工业(武汉)有限公司 直流电压产生电路
CN104571238A (zh) * 2013-10-25 2015-04-29 珠海格力电器股份有限公司 电压调节电路
CN111130345A (zh) * 2020-01-09 2020-05-08 上海金智晟东电力科技有限公司 一种物联传感器自动供电装置、物联传感器及物联设备

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Publication number Priority date Publication date Assignee Title
CN103095124A (zh) * 2011-11-01 2013-05-08 现代摩比斯株式会社 低电压dc-dc转换器的输出电压调节装置
CN103427685A (zh) * 2012-05-24 2013-12-04 鸿富锦精密工业(武汉)有限公司 直流电压产生电路
CN104571238A (zh) * 2013-10-25 2015-04-29 珠海格力电器股份有限公司 电压调节电路
CN104571238B (zh) * 2013-10-25 2016-04-13 珠海格力电器股份有限公司 电压调节电路
CN111130345A (zh) * 2020-01-09 2020-05-08 上海金智晟东电力科技有限公司 一种物联传感器自动供电装置、物联传感器及物联设备

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