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ICS1702 Datasheet

  • ICS1702

  • QuickSaver Charge Controller for Nickel-Cadmium and Nickel-M...

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  • 28页

  • ETC

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ICS1702
QuickSaver庐 Charge Controller for Nickel-Cadmium
and Nickel-Metal Hydride Batteries
General Description
The
ICS1702
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
ICS1702
employs a four stage charge sequence
that provides a complete recharge with-out overcharging. The
controller has nine user-selectable charge rates and six user-
selectable auxiliary modes available for customized charging
systems.
The
ICS1702
monitors for the presence of a battery and begins
charging when a battery is installed. Voltage and temperature are
measured to ensure a battery is within fast charge conditions before
charge is initiated.
Features
鈥?/div>
Multiple charge termination methods include:
-
Voltage slope
-
Temperature slope
-
Maximum temperature
-
Charge timer
鈥?/div>
Four stage charge sequence:
-
Soft start charge
-
Fast charge
-
Topping charge
-
Maintenance charge
鈥?/div>
Reverse-pulse charging available in all charge stages
鈥?/div>
Nine programmable charge rates between 15 minutes (4C) and
four hours (C/4)
鈥?/div>
Out-of-temperature range detection
-
Hot battery: charger shutdown
-
Cold battery: low current charge
鈥?/div>
Continuous polling mode for battery detection
鈥?/div>
Six auxiliary modes include:
-
Discharge-before-charge
-
Ten hour C/10 conditioning charge
-
Direct to C/40 maintenance charge
-
Charging system test provided through controller
鈥?/div>
Adjustable open circuit (no battery) voltage reference
Applications
Battery charging systems for:
-
Portable consumer electronics
-
Power tools
-
Audio/video equipment
-
Communications equipment
-
Portable medical electronics
-
Wireless handsets
Block Diagram
CHARGE
SELECT
OPEN CIRCUIT
REFERENCE
VOLTAGE
SENSE
TERMINATION
SELECT
TEMPERATURE
SENSE
HOT
MODE SELECT
RESET
RC
OSCILLATOR
QuickSaver
庐
is a registered trademark of Galaxy Power, Inc
.
POLLING
MODE LED
0.5V
MICROCODE CONTROL
CHARGE
MODE LED
MAINTENANCE
MODE LED
TEMPERATURE
STATUS LED
CHARGE
CONTROL
RAM
ROM
DISCHARGE
CONTROL
ADC
PROCESSOR
OUTPUT
CONTROL
COLD

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