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DS2788E+ Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS2788E+ Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 30 page General Description The DS2788 measures voltage, temperature, and cur- rent, and estimates available capacity for rechargeable lithium-ion (Li+) and Li+ polymer batteries. Cell charac- teristics and application parameters used in the calcu- lations 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 cur- rent 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 dis- play 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 Power Tools Electric Bicycles Electric Vehicles Uninterruptible Power Supply Digital Cameras 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 Stand-Alone Fuel-Gauge IC with LED Display Drivers ________________________________________________________________ Maxim Integrated Products 1 2 11 PIO 4 VDD 12 LED5 3 DVSS 13 LED4 LED1 14 LED3 1 LED2 TOP VIEW DS2788 8 VMA 7 DQ 9 SNS 6 VSS 10 VIN 5 OVD TSSOP + Pin Configuration Ordering Information Rev 0; 10/07 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. + Denotes a lead-free package. T&R = Tape and reel. Typical Operating Circuit appears at end of data sheet. PART TEMP RANGE PIN-PACKAGE DS2788E+ -25°C to +70°C 14 TSSOP DS2788E+T&R -25°C to +70°C 14 TSSOP 1-Wire is a registered trademark of Dallas Semiconductor Corp., a wholly owned subsidiary of Maxim Integrated Products, Inc. |
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