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BQ24312DSGR
Overvoltage and Overcurrent Protection IC & Li+ Charger Front-End Protection
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bq24312SLUS912A –AUGUST 2009–REVISED AUGUST 2015
bq24312 Overvoltage and Overcurrent Protection IC and
Li+ Charger Front-End Protection IC Features 3 DescriptionThe bq24312 deviceisa highly integrated circuit (IC) Provides Protection for Three Variables: designedto provide protectionto Li-ion batteries from– Input Overvoltage Protection failures of the charging circuit. The device User-Programmable Overcurrent with Current continuously monitors the input voltage, the input
Limiting current, and the battery voltage.In caseof an input
overvoltage condition, the device immediately– Battery Overvoltage removes power from the charging circuit by turning• Maximum Input Voltageof30V off an internal switch.In the caseof an overcurrent Supportsupto 1.5-A Input Current condition,it limits the system currentat the threshold
value, andif the overcurrent persists, switches the• Robust Against False Triggering Dueto Current pass element OFF after a blanking period.Transients Additionally, the device also monitors its own die• Thermal Shutdown temperature and switchesoffifit exceeds 140°C. The• Enable Input input overcurrent thresholdis user-programmable. Status Indication– Fault Condition The device canbe controlledbya processor and also Availablein Space-Saving Small8 Lead2×2 provides status information about fault conditionsto
WSON the host.
Device Information(1)2 Applications• Mobile Phones and Smart Phones• PDAs
(1) Forall available packages, see the orderable addendumat• MP3 Players the endofthe data sheet.• Low-Power Handheld Devices Bluetooth™ Headsets
Simplified Schematic
