ICS1708 Datasheet | Unknown Manufacturer

Quick Saver® 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 (Ni Cd) or nickel-metal hydride (Ni MH) 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 plete 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, munications 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: Soft Start 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 -pared 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 0.5V BATTERY VOLTAGE SENSE MICROCODE CONTROL FAST CHARGE PROCESSOR OUTPUT CONTROL CHARGE PLETE CURRENT SOURCE RAM RC (CLOCK) OSCILLATOR Pin Configuration CHG MMN CMN VSS 1 2 3 4 ICS1708 8 7 6 5 VDD VIN OPREF RC 8-Pin DIP or SOIC Pin Definitions Pin 1 2 3 4 5 6 7 8 Note: Name CHG CMN MMN VSS RC OPREF VIN VDD Type OUT OUT...