ICS1708 Datasheet, PDF (1/16 Pages) List of Unclassifed Manufacturers – QuickSaver Charge Control IC for Nickel-Cadmium and Nickel-Metal Hydride Batteries

ICS1708
QuickSaver® Charge Control IC for Nickel-Cadmium
and Nickel-Metal Hydride Batteries
General Description
The ICS1708 is a low cost 8 pin CMOS control IC for the intelligent charging of either nickel-cadmium (NiCd) or nickel-metal hydride
(NiMH) batteries. The ICS1708 uses a pulsed-current charging technique together with multiple voltage slope termination methods. The
ICS1708 employs a four stage charge sequence that provides a complete recharge without overcharging. The controller has three (3) user
selectable charge rates, user accessible clock, and two (2) charge status output pins. On power-up, the ICS1708 monitors for the presence of
a battery and begins charging. The ICS1708 is for applications where battery temperature protection is not required of the charge controller.
Applications
Embedded and charger stands for: Portable consumer products, Power tools, Audio/video products, Communications products, RC toys,
and Wireless products
Features
• Charge termination methods include: Voltage slope (+∆V/dt and +/- peak detect), and Fast charge time out to maintenance mode
• Four stage charge sequence: SoftStart conditioning, Fast charge, Topping charge, and Maintenance charge
• Three (3) user selectable charge rates: 15 minutes (4C), 60 minutes (1C), 150 minutes (C/2.5)
• Continuous polling mode for battery detection
• Adjustable open circuit (no battery) voltage reference
Benefits -compared to other methods
• Peak battery performance and extended cycle life
• Improved battery efficiency and reliability
• Lower internal resistance build-up
• Lower capacity fade
Block Diagram
OPEN CIRCUIT
REFERENCE
VOLTAGE
BATTERY
VOLTAGE
SENSE
RC (CLOCK)
0.5V
ADC
MICROCODE CONTROL
PROCESSOR
OUTPUT
CONTROL
RAM
ROM
OSCILLATOR
FAST
CHARGE
CHARGE
COMPLETE
CURRENT
SOURCE