High Accuracy Linear Li-ion Battery Charger XT2057 ■ General Description The XT2057 is a complete constant-current/ constant voltage linear charger for cell lithium-ion batteries.
Its package and low external component count make the XT2057 ideally suited for portable applications.
The charge current can be programmed externally with a single resistor.
XT2057 determines the charge mode by detecting the battery voltage: Pre-charge, constant current charging, constant voltage charging.
The charge current of pre-charging and constant –current charging is adjustable.
The XT2057 is monitored by temperature monitor during the constant-current and constant-voltage charging.
There are two LEDs ind...

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