ICS1700A Datasheet, PDF (1/24 Pages) List of Unclassifed Manufacturers – QuickSaver Charge Controller for Nickel-Cadmium and Nickel-Metal Hydride Batteries

ICS1700A
QuickSaver® 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.
Applications
Battery charging systems for:
- Portable consumer electronics
- Power tools
- Audio/video equipment
- Communications equipment
- Wireless handsets
Features
• 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
Block Diagram
CHARGE
SELECT
VOLTAGE
SENSE
2.0V
TEMPERATURE
SENSE
COLD
RESET
RC
ADC
0.5V
HOT
MICROCODE CONTROL
PROCESSOR
OUTPUT
CONTROL
RAM
ROM
POLLING/
FAULT LED
CHARGE
MODE LED
TEMPERATURE
STATUS LED
CHARGE
CONTROL
DISCHARGE
CONTROL
OSCILLATOR