Battery Management IC BQ27542DRZR-G1 1A,Sgl Inp,Sgl Cell Li-Ion Batt Charger Chip

Applications

• Smart phones

• PDAs

• MP3 players

• Low-power handheld devices

Specifications

Description

The BQ2409x series of devices are highly integrated Li-ion and Li-Pol linear chargers devices targeted at

space-limited portable applications. The devices operate from either a USB port or AC adapter. The high

input voltage range with input overvoltage protection supports low-cost unregulated adapters.

The BQ2409x has a single power output that charges the battery. A system load can be placed in parallel

with the battery as long as the average system load does not keep the battery from charging fully during

the 10-hour safety timer.

The battery is charged in three phases: conditioning, constant current and constant voltage. In all charge

phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an

internal temperature threshold is exceeded.

Features

• Charging – 1% charge voltage accuracy

– 10% charge current accuracy

– Pin selectable USB 100-mA and 500-mA maximum input current limit

– Programmable termination and precharge threshold

• Protection – 6.6-V overvoltage protection

– Input voltage dynamic power management

– 125°C thermal regulation; 150°C thermal shutdown protection

– OUT short-circuit protection and ISET short detection

– Operation over JEITA range via battery NTC

– ½ fast-charge-current at cold, 4.06 V at hot, BQ092/3

– Fixed 10-hour safety timer

• System

– Automatic Termination and Timer Disable Mode (TTDM) for absent battery pack with thermistor

– Status indication

– charging/done

– Available in a small 10-pin MSOP package

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