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电池过放电或电源部分有故障,使电源电压降到最小工作电压以下,这称为欠压。欠压虽不会损坏电路中的 IC,但工作电压过低会造成电路工作不正常或性能变坏,达不到电路精度要求。为防止欠压造成的不良后果,采用欠压锁存电路,自动切断电源,直至电源恢复到最小工作电压以上时,电源才自动接通恢复正常工作。
Battery discharge or partial failure of the power supply, the power supply voltage down to the minimum operating voltage, which is called undervoltage. Although the undervoltage will not damage the IC in the circuit, but the working voltage is too low will cause the circuit to work abnormally or deteriorate the performance, reach the circuit accuracy requirements. To prevent the adverse consequences of undervoltage, the use of under-voltage latch circuit, automatically cut off the power until the power to restore the minimum operating voltage above the power is automatically connected to resume normal work.