ICS1712
QuickSaver® Charge Controller for Nickel-Cadmium
and Nickel-Metal Hydride Batteries
General Description
The
ICS1712
is a CMOS device designed for the intelligent charge
control of either nickel-cadmium (NiCd) or nickel-metal-hydride
(NiMH) batteries. The controller uses a pulsed-current charging
technique together with voltage slope and/or temperature slope
termination. The
ICS1712
employs a four stage charge sequence
that provides a complete recharge without overcharging. The
controller has four user-selectable charge rates available for
customized charging systems.
The
ICS1712
monitors for the presence of a battery and begins
charging if a battery is installed within the first 10 seconds after a
reset. Voltage and temperature are measured to ensure a battery is
within fast charge conditions before charge is initiated.
Features
•
Multiple charge termination methods include:
-
Voltage slope
-
Temperature slope
-
Maximum temperature
-
Charge timer
Four stage charge sequence:
-
Soft start charge
-
Fast charge
-
Topping charge
-
Maintenance charge
Reverse-pulse charging available in all charge stages
Four programmable charge rates between 15 minutes (4C) and
two hours (C/2)
Out-of-temperature range detection
-
Hot battery: charger shutdown
-
Cold battery: low current charge
Ten second polling mode for battery detection
Battery fault with shutdown protection
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Applications
Battery charging systems for:
-
Portable consumer electronics
-
Power tools
-
Audio/video equipment
-
Communications equipment
-
Wireless handsets
Block Diagram
CHARGE
SELECT
2.0V
0.5V
VOLTAGE
SENSE
TERMINATION
SELECT
TEMPERATURE
SENSE
HOT
RESET
RC
OSCILLATOR
QuickSaver
®
is a registered trademark of Galaxy Power, Inc.
POLLING/
FAULT LED
MICROCODE CONTROL
CHARGE
MODE LED
OUTPUT
CONTROL
TEMPERATURE
STATUS LED
CHARGE
CONTROL
RAM
ROM
DISCHARGE
CONTROL
ADC
PROCESSOR
COLD
GALAXY [ GALAXY POWER, INC. ]
