5V/1A Constant AC Stabilized Voltage Power Supply Circuit

Published:2011/7/13 7:25:00 Author:Michel | Keyword: 5V/1A, Constant AC , Stabilized Voltage, Power Supply Circuit | From:SeekIC

The above picture is 5V/1A constant AC stabilized voltage power supply circuit.The circuit can still provide 5V/1A power supply in 80 minutes when 5V main power supply is off.MAX709 is monitoring circuit and the feet 7 outputs high PWL and transistor VT is in conduction state when its feet 2 monitors main power supply.The DC/DC converter MAX720 is in shut-off mode and VT1 and VT2 charge batteries.Feet 7 outputs low PWL and VT2 and VT3 stop and MAX720 is in work mode and constant power output increases to 5V when main power supply decreases to MAX709 offsetting threshold level(typical value is 4.65V).



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