ISL6294IRZ

The ISL6294IRZ belongs to ISL6294 family, which is a cost-effective, fully integrated high input voltage single-cell Li-ion battery charger. The charger ISL6294IRZ uses a CC/CV charge profile required by Li-ion batteries. The charger ISL6294IRZ accepts an input voltage up to 28V but is disabled when the input voltage exceeds the OVP threshold, typically 6.8V, to prevent excessive power dissipation. The 28V rating eliminates the overvoltage protection circuit required in a low input voltage charger. The charge ISL6294IRZ current and the end-of-charge (EOC) current are programmable with external resistors. When the battery voltage is lower than typically 2.55V, the charger preconditions the battery with typically 20% of the programmed charge current. When the charge current reduces to the programmable EOC current level during the CV charge phase, an EOC indication is provided by the CHG pin, which is an open-drain output. An internal thermal foldback function protects the charger from any thermal failure. Two indication pins (PPR and CHG) allow simple interface to a microprocessor or LEDs. When no adapter is attached or when disabled, the charger draws less than 1µA leakage current from the battery.

The features of ISL6294IRZ are (1)complete charger for single-cell Li-ion/polymer batteries; (2)integrated pass element and current sensor; (3)no external blocking diode required; (4)low component count and cost; (5)1% voltage accuracy ; (6)programmable charge current; (7)programmable end-of-charge current; (8)charge current thermal foldback for thermal; (9)protection; (10)trickle charge for fully discharged batteries ; (11)28V maximum voltage for the power input; (12)less than 1µA leakage current off the battery when No ; (13)power presence and charge indications; (14)input power attached or charger disabled; (15)8 Ld 2x3 DFN packages; (16)Pb-Free plus anneal available (RoHS Compliant); (17)ambient temperature range: -40°C to 85°C. It can be used in mobile phones; blue-tooth devices; PDAs; MP3 players; stand-alone chargers; other handheld devices.

The absolute maximum ratings of ISL6294IRZ are(1)VIN: -0.3V to 30V; (2)IMIN, IREF, BAT, CHG, EN, PPR: -0.3V to 7V; (3)ESD rating: human body model (per EIA JESD22 Method A114-B): 3kV/machine model (per EIA JED-4701 Method C-111): 200V; (4)ambient temperature range: -40°C to 85°C; (5)maximum supply voltage (VIN Pin): 28V; (6)operating supply voltage (VIN Pin): 4.5V to 6.5V; (7)programmed charge current: 100mA to 900mA; (8)maximum junction temperature (plastic package): 150°C; (9)maximum storage temperature range: -65°C to 150°C; (10)maximum lead temperature (soldering 10s): 300°C.(CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.)