Portable hard disk with power-off protection

Abstract

The utility model relates to a storage device field especially, and more particularly to a portable hard disk with power -off protection, including capacitor energy storage module, charge -discharge management module, switching circuit, firmware cooperation module, storage module, capacitor energy storage module includes at least two parallel supercapacitors, a fusible resistor is connected in series at each supercapacitor, is used for disconnecting fault capacitor at abnormal time, avoids whole group failure, and capacitor energy storage module provides emergency power supply when hard disk power -off, charge -discharge management module includes PMIC chip, NTC thermistor, is used for dynamic adjustment charging current when detecting temperature overrun, realizes charging control, the utility model can pass through supercapacitor parallel design and fusible resistance series protection, avoid whole group failure and improve emergency power supply reliability, real -time monitoring capacitor temperature, switches charging mode, effectively prevents over -temperature damage, prolongs supercapacitor life, and switching circuit realizes nanosecond -level power supply switching.

Images