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ICS1708S Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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1 / 16 page 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 CURRENT SOURCE BATTERY VOLTAGE SENSE OPEN CIRCUIT REFERENCE VOLTAGE PROCESSOR MICROCODE CONTROL ADC RAM ROM OUTPUT CONTROL 0.5V FAST CHARGE CHARGE COMPLETE RC (CLOCK) OSCILLATOR |
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