PRODUCT O B S O LE TE LACEMENT ENDED REP r at NO RECOMM pport Cente Technical Su tersil.com/tsc r u o ct ta n co w.in SIL or wwTo request the full datasheet, please visit www.intersil.com/products/isl9519c 1-888-INTER DATASHEET Narrow VDC Regulator/Charger with SMBus Interface and Internal Switching FETs ISL9519C Features The ISL9519C is a highly integrated Narrow VDC system voltage regulator and battery charger controller. Operating parameters are programmable over the System Management Bus (SMBus). The ISL9519C is designed for applications where the system power source is either the battery pack or the output of the regulator/charger. This makes the max voltage to the system equal to the max battery voltage instead of the max adapter voltage. The ISL9519C also includes a patented system to control trickle charging deeply discharged batteries while maintaining system voltage at a user defined minimum. High efficiency is achieved with a DC/DC synchronous-rectifier buck converter, equipped with diode emulation and variable switching frequency for enhanced light load efficiency and AC-adapter boosting prevention. The ISL9519C can charge one, two or three series connected Lithium-ion cells, at up to 8A charge current. Default settings for 1-, 2- or 3-cell operation at power-up are selected by an external pin. Integrated MOSFETs, drivers and bootstrap diode result in fewer components and smaller implementation area. Low offset current-sense amplifiers provide high accuracy. • ±0.5% System Voltage Accuracy (-10°C to +100°C) The ISL9519C provides an open drain digital output that indicates the presence of the AC-adapter. The ISL9519C also provides an analog output that indicates the adapter current. • Monitor Outputs - Adapter Current (2.5% Accuracy) - AC-adapter Present Indicator Applications • ±3% Accurate Input Current Limit • ±3% Accurate Battery Charge Current Limit • Variable Switching Frequency at Light Load Conditions for Higher Efficiency • Fixed Frequency Operation at Higher Loads - Fixed Frequency Mode can be Forced by an External Pin • Trickle Charge System for Deeply Discharged Batteries - Automatic Trickle Charge Current (256mA) - Holds Minimum Voltage to System • SMBus 2-Wire Serial Interface • Default System Voltage Values for 1-Cell, 2-Cell or 3-Cell Operation Selected by an External Pin • Adapter In-rush FET Control • Adapter Isolation FET Control • Battery Short Circuit Protection • Fast System-Load Transient Response • 11-Bit Max System Voltage Setting • Notebook Computers • 7-Bit Min System Voltage Setting • Tablet PCs • 6-Bit Charge Current Setting - Over 8A Battery Charger Current • Portable Equipment with Rechargeable Batteries • 6-Bit Adapter Current Setting - Over 8A Adapter Current • +4.5V to +22V Adapter Voltage Range • Pb-Free (RoHS Compliant) 100 8 MAX OUTPUT CURRENT (A) 3 CELL (12.6V) 2 CELL (8.4V) EFFICIENCY (%) 95 90 1 CELL (4.2V) 2 CELL (6V) 85 80 1 CELL (3V) 75 70 0 1 2 3 4 5 SYSTEM LOAD (A) FIGURE 1. EFFICIENCY June 30, 2011 FN7823.0 1 6 7 8 1 CELL (4.2V) 7 6 5 3 CELL (12.6V) 4 1 CELL (3V) 2 CELL (8.4V) 2 CELL (6V) 3 2 1 0 25 45 65 85 105 MAX AMBIENT TEMPERATURE (°C) 125 FIGURE 2. MAX LOAD CURRENT vs AMBIENT TEMPERATURE WITH 1M/s FORCED AIR COOLING CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas LLC. 2011. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL9519C 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 Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets 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 Submit Document Feedback 2 FN7823.0 June 30, 2011