DATASHEET ISL6255, ISL6255A FN9203 Rev 2.00 Highly Integrated Battery Charger with Automatic Power Source Selector for May 23, 2006 Notebook Computers The ISL6255, ISL6255A is a highly integrated battery charger Features controller for Li-Ion/Li-Ion polymer batteries. High Efficiency is 0.5% Charge Voltage Accuracy (-10C to 100C) achieved by a synchronous buck topology and the use of a MOSFET, instead of a diode, for selecting power from the 3% Accurate Input Current Limit adapter or battery. The low side MOSFET emulates a diode at 3% Accurate Battery Charge Current Limit light loads to improve the light load efficiency and prevent 25% Accurate Battery Trickle Charge Current Limit system bus boosting. (ISL6255A) The constant output voltage can be selected for 2, 3 and 4 Programmable Charge Current Limit, Adapter Current series Li-Ion cells with 0.5% accuracy over temperature. It can Limit and Charge Voltage also be programmed between 4.2V+5%/cell and 4.2V-5%/cell to optimize battery capacity. When supplying the load and Fixed 300kHz PWM Synchronous Buck Controller with battery charger simultaneously, the input current limit for the Diode Emulation at Light Load AC adapter is programmable to within 3% accuracy to avoid Output for Current Drawn from AC Adapter overloading the AC adapter, and to allow the system to make AC Adapter Present Indicator efficient use of available adapter power for charging. It also has a wide range of programmable charging current. The Fast Input Current Limit Response ISL6255, ISL6255A provides outputs that are used to monitor Input Voltage Range 7V to 25V the current drawn from the AC adapter, and monitor for the presence of an AC adapter. The ISL6255, ISL6255A Support 2, 3 and 4 Cells Battery Pack automatically transitions from regulating current mode to Up to 17.64V Battery-Voltage Set Point regulating voltage mode. Control Adapter Power Source Select MOSFET ISL6255, ISL6255A has a feature for automatic power source selection by switching to the battery when the AC adapter is Thermal Shutdown removed or switching to the AC adapter when the AC adapter Aircraft Power Capable is available. It also provides a DC adapter monitor to support DC Adapter Present Indicator aircraft power applications with the option of no battery charging. Battery Discharge MOSFET Control Ordering Information Less than 10A Battery Leakage Current PART Support Pulse Charging NUMBER PART TEMP PACKAGE PKG. Charge Any Battery Chemistry: Li-Ion, NiCd, NiMH, etc. (Notes 1, 2) MARKING RANGE (C) (Pb-free) DWG. Pb-Free Plus Anneal Available (RoHS Compliant) ISL6255HRZ ISL6255HRZ -10 to 100 28 Ld 5x5 QFN L28.5 5 ISL6255HAZ ISL6255HAZ -10 to 100 28 Ld QSOP M28.15 Applications ISL6255AHRZ ISL6255AHRZ -10 to 100 28 Ld 5x5 QFN L28.5 5 Notebook, Desknote and Sub-notebook Computers ISL6255AHAZ ISL6255AHAZ -10 to 100 28 Ld QSOP M28.15 Personal Digital Assistant NOTES: 1. Intersil Pb-free plus anneal products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 2. Add -T for Tape and Reel. FN9203 Rev 2.00 Page 1 of 22 May 23, 2006ISL6255, ISL6255A Pinouts ISL6255, ISL6255A ISL6255, ISL6255A (28 LD QFN) (28 LD QSOP) TOP VIEW TOP VIEW 1 28 DCIN DCPRN 2 27 ACPRN VDD 28 27 26 25 24 23 22 3 26 CSON ACSET 1 21 EN CSOP 4 25 CSOP DCSET 5 24 CELLS 2 20 CSIN EN CSIN 6 23 CSIP CELLS 3 19 CSIP ICOMP 7 22 SGATE ICOMP VCOMP 4 18 SGATE 8 21 BGATE VCOMP 5 17 9 20 ICM BGATE ICM PHASE 10 19 UGATE VREF VREF 6 16 PHASE 11 18 BOOT CHLIM UGATE CHLIM 7 15 12 17 VDDP ACLIM 8 9 10 11 12 13 14 13 16 LGATE VADJ 14 15 GND PGND FN9203 Rev 2.00 Page 2 of 22 May 23, 2006 ACLIM DCSET ACSET VADJ VDD GND DCIN PGNDPGNDPGND LGATE DCPRN ACPRN VDDP BOOT CSON