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Elite Semiconductor - Standalone 1.2A Linear Li-Ion Battery Charger

Numéro de référence EMC5755
Description Standalone 1.2A Linear Li-Ion Battery Charger
Fabricant Elite Semiconductor 
Logo Elite Semiconductor 





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EMC5755 fiche technique
ESMT/EMP
EMC5755
Standalone 1.2A Linear Li-Ion Battery Charger
with Thermal Regulation in TDFN-6
General Description
The EMC5755 is a complete linear charger for single cell
lithium-ion batteries. With small TDFN-6 package and
few external components, EMC5755 is well suited for
portable applications. In addition, the EMC5755 is
specifically designed to work within USB power
specifications.
No external sense resistor and blocking diode are
required. Charging current can be programmed
externally with a single resistor. The built-in thermal
regulation facilitates charging with maximum power
without risk of overheating.
The EMC5755 always preconditions the battery with
1/10 of the programmed charge current at the
beginning of a charge cycle, until 40μs after it verifies
that the battery can be fast-charged. The EMC5755
automatically terminates the charge cycle when the
charge current drops to 1/10th the programmed value
after the final float voltage is reached.
The EMC5755 consumes zero reverse current from the
battery at standby, shutdown and sleep modes. This
feature reduces the charge and discharge cycles on
the battery, further prolonging the battery life. The
EMC5755 can also be used as a LDO when battery is
removed. Other features include shutdown mode,
charge current monitor, under voltage lockout,
automatic recharge and status indicator.
Features
„ Programmable charge current up to 1.2A
„ No MOSFET, sense resistor or blocking diode
required
„ Complete linear charger in TDFN-6 for single cell
Lithium-ion batteries
„ Typical zero reverse current from battery
„ Thermal regulation maximizes charge rate
without risk of overheating
„ Charges single cell Li-ion batteries directly from
USB port
„ Act as a LDO when battery is removed
„ Preset 4.2V charge voltage with ±1% accuracy
„ Automatic recharge
„ Charge status indicator
„ C/10 charge termination
„ 45μA shutdown supply current
„ 2.9V trickle charge threshold
„ Soft-start limits inrush current
„ RoHS compliant and Pb-free
Applications
„ Wireless handsets
„ Hand-held instruments
„ Portable information appliances
„ Bluetooth application
„ Charging docks and cradles
„ Typical Application Diagram
960 mA Charger
LDO Mode
(Battery Removed)
„ Typical Performance Characteristics
Complete Charge Cycle (850mAh Battery)
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc.
Time (1000s/DIV)
Publication Date: Oct. 2010
Revision: 2.2
1/17

PagesPages 17
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