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HT7022A-2 Datasheet(PDF) 8 Page - Holtek Semiconductor Inc |
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HT7022A-2 Datasheet(HTML) 8 Page - Holtek Semiconductor Inc |
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8 / 17 page  HT70xxA-2 Rev. 1.20 8 December 14, 2012 · with 5V voltage regulator Change of Detectable Voltage If the required voltage is not found in the standard product selection table, it is possible to change it by using external resistance dividers or diodes. · Varying the detectable voltage with a resistance di- vider Detectable voltage = R+ R R AB B ´ VDET Hysteresis width = R+ R R AB B ´ VHYS · Varying the detectable voltage with a diode Detectable Voltage = Vf1+Vf2+VDET Malfunction Analysis The following circuit demonstrates the way a circuit analyzes malfunctions by monitoring the variation or spike noise of power supply voltage. Charge Monitoring Circuit The following circuit shows a charged monitor for protection against battery deterioration by overcharging. When the voltage of the battery is higher than the set detectable voltage, the transistor turns on to bypass the charge current, protecting the battery from overcharging. H T 7 0 4 4 A - 2 V S S V D D H T 7 1 5 0 - 1 V O U T V I N G N D 5 V 5 V V o l t a g e r e g u l a t o r H T 7 0 X X A - 2 V S S V I N V S S V O U T V D D R A R B H T 7 0 X X A - 2 V D D V I N V S S V f 1 V f 2 V O U T V S S H T 7 0 X X A - 2 V O U T V S S V D D V S S H T 7 0 X X A - 2 V D D V O U T V S S L o a d B A T T S o l a r C e l l T r |
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Similar Description - HT7022A-2 |
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