锂电池充电芯片,lc6000

c6000

description
the lc6000 is a single cell, fully integrated constant current (cc)/constant voltage (cv) li-ion battery charger. its compact package with minimum external components requirement makes the lc6000 ideal for portable applications.

no external sense resistor or blocking diode is necessary for the lc6000. build-in thermal feedback mechanism regulates the charge current to control the die temperature during high power operation or at elevated ambient temperature.

the lc6000 has a pre-charge function for trickle charging deeply discharged batteries. the fast charge current can be programmed by an external resistor. cv regulation mode is automatically enabled once the battery’s charging curve reaches the constant voltage portion. the output current then decays and is finally terminated once the charge current drops to 1/10th of the programmed value. the lc6000 keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 150mv below the cv value.

power supply state is constantly monitored and the battery drain current is reduced to minimum value automatically when the lc6000 senses a lack of input power. in its shutdown mode, the lc6000 can reduce the supply current to less than 25μa. a status pin outputs a logic high/low to indicate the charging status and the
presence of power supply.

other features include charge current monitor, under-voltage lockout.

features

. standalone capability with no requirement of external mosfet, sense
resistor or blocking diode.
. complete linear charger in compact package for single cell lithium-ion
batteries
. programmable pre-charge, fast charge and termination current.
. constant-current/constant-voltage operation with thermal regulation to
maximize charge rate without risk of overheating
. charges single cell li-ion batteries directly from usb port
. preset 4.2v charge voltage with ±1% accuracy
. automatic recharge
. charge status output pin
. c/10 charge termination
. 25ma supply current in shutdown
. 2.9v trickle charge threshold
. soft-start limits inrush current
. available in 5-lead sot-23 package

applications

. cellular telephones, pdas, mp3 players
. charging docks and cradles
. bluetooths applications