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INTEGRATED CIRCUITS DATA SHEET TEA1102; TEA1102T; TEA1102TS Fast charge ICs for NiCd, NiMH, SLA and LiIon Preliminary specification Supersedes data of 1997 Oct 09 File under Integrated Circuits, IC03 1999 Jan 27 Philips Semiconductors Preliminary specification Fast charge ICs for NiCd, NiMH, SLA and LiIon FEATURES · Safe and fast charging of Nickel Cadmium (NiCd), Nickel Metal Hydride (NiMH), Lithium Ion (LiIon), and Sealed Lead Acid (SLA) batteries · Three charge states for NiCd or NiMH; fast, top-off and trickle or voltage regulation (optional) · Two charge states for LiIon or SLA; current and voltage limited · Adjustable fast charge current [0.5CA to 5CA nominal (CA = Capacity Amperes)] · DC top-off and pulsating trickle charge current (NiCd and NiMH) · Temperature dependent T/t battery full detection · Automatic switch-over to accurate peak voltage detection (-1/4%) if no NTC is applied · Possibility to use both T/t and peak voltage detection as main fast charge termination · Support of inhibit during all charging states · Manual refresh with regulated adjustable discharge current (NiCd and NiMH) · Voltage regulation in the event of no battery · Support of battery voltage based charge indication and buzzer signalling at battery insertion, end of refresh and at full detection · Single, dual and separate LED outputs for indication of charge status state · Minimum and maximum temperature protection · Time-out protection · Short-circuit battery voltage protection · Can be applied with few low-cost external components. ORDERING INFORMATION TYPE NUMBER TEA1102 TEA1102T TEA1102TS PACKAGE NAME DIP20 SO20 SSOP20 DESCRIPTION plastic dual in-line package; 20 leads (300 mil) TEA1102; TEA1102T; TEA1102TS GENERAL DESCRIPTION The TEA1102x are fast charge ICs which are able fast charge NiCd and NiMH, SLA and Lilon batteries. The main fast charge termination for NiCd and NiMH batteries are T/t and peak voltage detection, both of which are well proven techniques. The TEA1102x automatically switches over from T/t to peak voltage detection if the thermistor fails or is not present. The T/t detection sensitivity is temperature dependent, thus avoiding false charge termination. Three charge states can be distinguished; fast, top-off and trickle. Charging Lilon and SLA batteries is completely different. When the batteries reach their maximum voltage (adjustable), the TEA1102x switches over from current regulation to voltage regulation. After a defined time period, which is dependent on battery capacity and charge current, charge is terminated. Due to small self discharge rates of Lilon and SLA batteries, trickle charge can be omitted. Several LEDs, as well as a buzzer, can be connected to the TEA1102x for indicating battery insertion, charge states, battery full condition and protection mode. The TEA1102x are contained in a 20-pin package and are manufactured in a BiCMOS process, essentially for integrating the complex mix of requirements in a single chip so