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专利名称：Switching voltage regulator with protective
device against thermal breakdown
发明人：Yoshinobu Ohshima申请号：US07/847623申请日：19920306公开号：US05291387A公开日：19940301
摘要：A switching-type voltage regulator of this invention comprises a voltage controlsection for generating a stabilized voltage by controlling a voltage supply period frominput side to output side, and a protective device. The protective device monitors thetemperature of a certain component part or parts of the voltage control section andconvert the temperature into a voltage to compare with the reference voltagegenerated by a reference voltage source, and brings the output of the voltage controlsection to a halt in accordance with the result of comparison. The output of the voltagecontrol section is brought to a halt regardless of the presence of output abnormalcywhen the temperature of the component part or parts monitored exceeds a certain level.As the monitoring means, it is preferable to utilize the electrical characteristic ofsemiconductor p-n junction changing with temperature, and a semiconductor diode ismore preferable. A preferable halting means is a 2-input AND circuit where a signalrepresenting the result of the comparing means are inputted into one of the inputterminals, and a switching control signal to the other to control a switching element.Preferably, a latching means is installed between the comparing means and haltingmeans to maintain a halted condition.
申请人：NEC CORPORATION
代理机构：Laff, Whitesel, Conte & Saret
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