Stand-Alone Fuel-Gauge IC with LED Display Drivers - Maxim Integrated Products - #1
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Text version of the page
| Rev 0; 10/07 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Stand-Alone Fuel-Gauge IC with LED Display Drivers | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| _General Description The DS2788 measures voltage, temperature, and current, and estimates available capacity for rechargeable lithium-ion (Li+) and Li+ polymer batteries. Cell characteristics and application parameters used in the calculations are stored in on-chip EEPROM. The available capacity registers report a conservative estimate of the amount of charge that can be removed given the current temperature, discharge rate, stored charge, and application parameters. Capacity estimation is reported in mAh remaining and percentage of full. LED display drivers and a debounced input make display of the capacity information easy. The LED pins can directly sink current, requiring only a resistor for setting the current in the LED display, thus reducing space and cost. _Applications | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Features | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ♦ Five 30mA Open-Drain Drivers for Driving LED Fuel-Gauge Display ♦ Debounced Fuel-Gauge Display Enable ♦ Internal Voltage Measurement Gain Register for Trimming External Voltage-Divider ♦ Pin for Driving FETs to Enable Voltage-Divider Only During Voltage Measurement, Conserving Power ♦ Precision Voltage, Temperature, and Current Measurement System ♦ Accurate, Temperature-Stable, Internal Time Base ♦ Absolute and Relative Capacity Estimated from Coulomb Count, Discharge Rate, Temperature, and Battery Cell Characteristics ♦ Accurate Warning of Low Battery Conditions ♦ Automatic Backup of Coulomb Count and Age Estimation to Nonvolatile (NV) EEPROM ♦ Gain and Tempco Calibration Allows the Use of Low-Cost Sense Resistors ♦ 24-Byte Battery/Application Parameter EEPROM ♦ 16-Byte User EEPROM ♦ Unique ID and Multidrop 1-Wire® Interface ♦ 14-Pin TSSOP Package | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Power Tools Electric Bicycles Electric Vehicles Uninterruptible Power Supply Digital Cameras | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Pin Configuration | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ordering Information | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| PART | TEMP RANGE | PIN-PACKAGE | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| +Denotes a lead-free package. T&R = Tape and reel. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Typical Operating Circuit appears at end of data sheet. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1-Wire is a registered trademark of Dallas Semiconductor Corp., a wholly owned subsidiary of Maxim Integrated Products, Inc. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| SV\J\yLAjy>\______________________________Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||