SC810 Datasheet, PDF (1/19 Pages) Semtech Corporation – Single Input/Single Mode Single-cell Li-ion Charger

POWER MANAGEMENT
Features
„ Single input charger
„ Constant voltage — 4.2V, 1% regulation
„ Fast-charge current regulation — 15% at 70mA,
9% at 700mA
„ Three mode charging — current regulation, voltage
regulation, and thermal limiting
„ Input voltage protection — 30V
„ Current-limited charging support — reduces power
dissipation in charger IC
„ Instantaneous CC-to-CV transition for faster charging
„ Three termination options — float-charge, automatic
re-charge, or forced re-charge to keep the battery
topped-off after termination without float-charging
„ Soft-start reduces adapter load transients
„ High operating voltage range permits use of
unregulated adapters
„ Complies with CCSA YD/T 1591-2006
„ Space saving 2x2x0.6 (mm) MLPD package
„ WEEE and RoHS compliant
Applications
„ Mobile phones
„ MP3 players
„ GPS handheld receivers
SC810
Single Input/Single Mode
Single-cell Li-ion Charger
Description
The SC810 is a linear single-cell Li-ion battery charger in a
6 lead 2x2 MLPD Ultra-thin package. The input will survive
sustained input voltage up to 30V to protect against hot
plug overshoot and faulty charging adapters.
Charging begins automatically when a valid input source
is applied. Thermal limiting protects the SC810 from
excessive power dissipation. It can be programmed to
turn off when charging is complete or to continue operat-
ing as an LDO regulator while float-charging the battery.
The input will charge with an adapter operating in voltage
regulation or in current-limit to obtain the lowest possible
power dissipation by pulling the input voltage down to
the battery voltage. The maximum fast-charge current
setting is 1A.
Charge current is programmed with a single resistor. Pre-
charge and termination current are fixed at 20% and 10%,
respectively, of the programmed fast-charge current.
Charge current steps up to the programmed value (soft
starts) to reduce load transients on the charging adapter.
Typical Application Circuit
V_ADAPTER
2.2 μF
SC810
VIN
STATB
GND
ENB
BAT
IPRGM
2.2 μF
Device
Load
Battery
Pack
February 26, 2008
© 2008 Semtech Corporation
1