BQ24381DSGR ,Overvoltage/Overcurrent Protection IC and Li+ Charger Front End Protection IC with LDO Mode, 7.1 OVP 8-WSON -40 to 125Features 3 DescriptionThe bq2438x family of devices are charger front-end1• Input Overvoltage Prote ..
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BQ24381DSGR
Overvoltage/Overcurrent Protection IC and Li+ Charger Front End Protection IC with LDO Mode, 7.1 OVP
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bq24380, bq24381, bq24382SLUS805C –APRIL 2008–REVISED AUGUST 2015
bq2438x Overvoltage and Overcurrent Protection IC and Li+ Charger
Front-End Protection IC With LDO Mode Features 3 DescriptionThe bq2438x familyof devices are charger front-end Input Overvoltage Protection integrated circuits (ICs) designed to provide• Accurate Battery Overvoltage Protection protection to Li-ion batteries from failures of the• Output Short-Circuit Protection charging circuit. The device continuously monitors the
input voltage and battery voltage. The device• Soft-Startto Prevent Inrush Currents operates likea linear regulator, maintaininga 5.5-V• Soft-Stopto Prevent Voltage Spikes (bq24380) or 5-V (bq24381, bq24382) output with• Maximum Input Voltageof30V input voltages upto the Input overvoltage threshold.
During input overvoltage conditions, the device• Supportsupto 1.7-A Load Current
immediately turns off the internal pass FET• Thermal Shutdown disconnecting the charging circuit from the damaging• Enable Function input source. Additionally,if the battery voltage rises Fault Status Indication to unsafe levels while charging, poweris removed
from the system. The device checks for short-circuit• Small2 mm×2 mm 8-Pin WSON Package or overload conditionsatits output when turning the
pass FET on, andifit finds unsafe conditions,it
2 Applications switches off and then rechecks the conditions.• Smart Phones, Mobile Phones Additionally, the device also monitors its die
temperature and switches offifit exceeds 140°C.• PDAs MP3 Players When the deviceis controlled bya processor, the
device provides status information about fault• Low-Power Handheld Devices conditionsto the host.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Simplified Schematic
