ISL6295| Datasheet

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ISL6295
Data Sheet November 10, 2005 FN9074.1

Low Voltage Fuel Gauge
The ISL6295 is a cost-effective, highly accurate IC that measures, stores, and reports all of the critical parameters required for rechargeable battery monitoring with a minimum of external components. It precisely measures charge/ discharge current as well as voltage and temperature of a battery pack. In addition, the ISL6295 accurately accumulates both charge and discharge current as independent parameters. Temperature history can also be maintained for calculating self-discharge effects. The ISL6295 integrates a highly accurate 16-bit (15-bit plus sign) integrating A/D converter that performs calibrated current measurement to within 0.5% error. On-chip counters precisely track battery charge/discharge and temperature history. Also included are an on-chip voltage regulation circuit, non-crystal time base, and on-chip temperature sensor. The operating voltage range of the ISL6295 is optimized to allow a direct interface to a single cell Li-Ion/Li-Poly pack. 256 bytes of general-purpose nonvolatile EEPROM s
torage are provided to store factory programmed, measured, and user defined parameters. Efficient communication is provided through an industry standard SMBus/I2CTM compatible 2-wire communications interface. This interface allows the host to determine accurate battery status for effective system power management and for communication to the end user. A battery management solution utilizing the ISL6295 delivers both space and total system component cost savings for a wide variety of battery operated applications.

Features
Measures, maintains, and reports all critical rechargeable battery parameters with high accuracy Supports Lithium Ion and Lithium Polymer battery packs Current measurement with 16-bit (15-bit plus sign) integrating A/D accurate to less than 0.5% error Calibrated temperature measurement accurate to within 3 C absolute using on-chip temp sensor or external thermistor Accumulation of charge current, discharge current, temperature, and voltage in independent 32-bit registers 256-byte nonvolatile EEPROM stores factory programmed, measured, and user-defined parameters In-system offset calibration compensates for offset error in current measurement Industry standard SMBus/I2CTM compatible 2-wire communications interface - SMBus V1.1 with PEC/CRC-8 communication -20 C to +85 C operating temperature range NTC pin can be configured as a thermistor input or GPIO GPAD pin can be configured as an independent A/D input or GPIO Flexible power operating modes allow low-power monitoring of battery c
onditions during system full operating and standby conditions: - Run: Continuous Conversion; 85uA typ. - Sample: Sample interval from 0.5-64s @ 45uA typ. - Sample-Sleep: Sample interval from 0.5-138s min. @ 20uA typ. Shelf-Sleep mode reduces power consumption to pack storage conditions to 300nA typ., with automatic wake-up upon pack insertion. Pb-free plus anneal available (RoHS compliant)

Ordering Information
PART NUMBER ISL6295CV ISL6295CV-T ISL6295CVZ (Note) PART TEMP MARKING RANGE ( C) 6295CV 6295CV 6295CVZ -20 C to 85 -20 C to 85 -20 C to 85 -20 C to 85 PKG. PACKAGE DWG. # 8 Ld TSSOP M8.173 8 Ld TSSOP M8.173 8 Ld TSSOP M8.173 (Pb-free) 8 Ld TSSOP M8.173 (Pb-free)

Applications
Notebook PC, PDAs, Hand Held Devices

ISL6295CVZ-T 6295CVZ (Note)

NOTE: 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.

Pinout
ISL6295 (TSSOP) TOP VIEW
GPAD/IO1 VP SCL SDA 1 2 3 4 8 7 6 5 SR GND NTC/IO0 ROSC

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners.