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HT7022A-3 Datasheet(PDF) 9 Page - Holtek Semiconductor Inc |
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HT7022A-3 Datasheet(HTML) 9 Page - Holtek Semiconductor Inc |
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9 / 15 page  Rev. 1.00 9 April 18, 2013 HT70xxA-3 5V Power Line Monitoring Circuit Generally,aminimumoperatingvoltageof4.5V is guaranteed in a 5V power line system. The HT7044A-3isrecommendedforuseas5Vpowerline monitoringcircuit. • 5Vpowerlinemonitorwithpower-onreset HT 7044A -3 V SS V DD V SS C V OU T 5V P ow er l in e D R • with5Vvoltageregulator HT 7044A -3 V SS V DD HT 7150- 3 V OU T V IN GN D 5V 5V V ol t age r egul at or Change of Detectable Voltage Iftherequiredvoltageisnotfoundinthestandard productselectiontable,itispossibletochangeitby usingexternalresistancedividersordiodes. • Varyingthedetectablevoltagewitharesistance divider HT 70xxA -3 V SS V IN V SS V OU T V DD R A R B Detectablevoltage=(RA+RB)/RB×VDET Hysteresiswidth=(RA+RB)/RB×VHYS • Varyingthedetectablevoltagewithadiode HT 70xxA -3 V DD V IN V SS Vf 1 Vf 2 V OU T V SS Detectablevoltage=Vf1+Vf2+VDET Malfunction Analysis Thefollowingcircuitdemonstratesthewayacircuitanalyzes malfunctionsbymonitoringthevariationorspikenoiseofpower supplyvoltage. HT 70xxA -3 V OU T V SS V DD V SS Charge Monitoring Circuit The following circuit shows a charged monitor for protection against battery deterioration by overcharging.Whenthevoltageofthebatteryis higherthanthesetdetectablevoltage,thetransistor turnsontobypassthechargecurrent,protectingthe batteryfromovercharging. HT 70xxA -3 V DD V OU T V SS Load BA TT So la r Ce ll Tr |
Similar Part No. - HT7022A-3 |
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Similar Description - HT7022A-3 |
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