DATA SHORT To request the full datasheet, please visit www.intersil.com/products/isl88732 ISL88732 FN7946 Rev.0.00 SMBus Level 2 Battery Charger with Boost Mode September 25, 2012 The ISL88732 is a highly integrated Lithium-ion battery charger Features controller, programmable over the SMBus system management Boost Mode to support Intel Turbo Mode bus (SMBus). The ISL88732 is intended to be used in a smart battery charger (SBC) within a smart battery system (SBS) that Pin compatible with ISL88731 throttles the charge power such that the current from the Over-temp and overcurrent protection AC-adapter is automatically limited. High efficiency is achieved 0.5% battery voltage accuracy with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation for enhanced light load efficiency. The 4% adapter current limit accuracy ISL88732 charges one to four Lithium-ion series cells, and 3% charge current accuracy delivers up to 8A charge current. Integrated MOSFET drivers and bootstrap diode result in fewer components and smaller SMBus 2-wire serial interface implementation area. Low offset current-sense amplifiers Charge current limited by SMBus DAC OR analog voltage at provide high accuracy with 10m sense resistors. The the CCLIM pin ISL88732 provides 0.5% end-of-charge battery voltage Turbo-boost discharge current limit can be set to 3.3x, 4.85x, accuracy. 6.37x or 9.31x the charge current limit by SMBus command The ISL88732 is available in a small 5mmx5mm 28 Ld Thin Monitor outputs (0.8mm) QFN package. - Adapter current (3% accuracy) Boost Mode - Adapter overcurrent ALERT . Threshold set by resistor divider If system load current is higher than the adapter current limit, - AC-adapter detection ISL88732 will operate in boost mode to draw power from the battery and boost it to adapter voltage. System load current 11-bit battery voltage setting will be supplied partly from the adapter and partly from the 6-bit charge current/adapter current setting battery. 8A maximum battery charger current ISL88732 performs this function by (1) detecting high adapter 11A maximum adapter current current, (2) reducing charge current to zero and (3) controlling LFET ON time to boost current from the battery and limit +8V to +22V adapter voltage range current from the adapter. Pb-free (RoHS compliant) Applications Notebook computers Tablet PCs Typical Operating Performance 10 CC = 2.048A, AC = 2.048A, CV = 12.592V, V = 10V BAT 8 INPUT CURRENT 6 LIMITED BY REDUCING INPUT CURRENT CHARGE CURRENT 4 2 INPUT CURRENT LIMITED BY BOOSTING CURRENT FROM BATTERY TO SYSTEM LOAD 0 DISCHARGE -2 CURRENT LIMIT, INPUT CURRENT SYSTEM LOAD CURRENT -4 NO LONGER IN LIMIT -6 CHARGE CURRENT -8 0 1 2 3 4 5 6 7 8 SYSTEM LOAD CURRENT (A) FIGURE 1. ISL88732 CURRENT CONTROL IN 4 MODES FN7946 Rev.0.00 Page 1 of 2 September 25, 2012 CURRENT (A) ISL88732 Copyright Intersil Americas LLC 2012. All Rights Reserved. All trademarks and registered trademarks are the property of their respective owners. For additional products, see www.intersil.com/en/products.html Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted in the quality certifications found at www.intersil.com/en/support/qualandreliability.html Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such modification does not, in Intersil s sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com FN7946 Rev.0.00 Page 2 of 2 September 25, 2012