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ICS1700AMT Datasheet

  • ICS1700AMT

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

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ICS1700A
QuickSaver庐 Charge Controller for Nickel-Cadmium
and Nickel-Metal Hydride Batteries
General Description
The
ICS1700A
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 termination. The
ICS1700A
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
ICS1700A
is a pin-for-pin replacement for the
original ICS1700 controller.
The
ICS1700A
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
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Multiple charge termination methods include:
-
Voltage 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
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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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
VOLTAGE
SENSE
2.0V
0.5V
COLD
HOT
RAM
ROM
MICROCODE CONTROL
ADC
POLLING/
FAULT LED
CHARGE
MODE LED
PROCESSOR
OUTPUT
CONTROL
TEMPERATURE
STATUS LED
CHARGE
CONTROL
DISCHARGE
CONTROL
TEMPERATURE
SENSE
RESET
RC
OSCILLATOR

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