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MAX8765AETI+ Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX8765AETI+ Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 30 page General Description The MAX1908/MAX8724/MAX8765/MAX8765A highly integrated, multichemistry battery-charger control ICs simplify the construction of accurate and efficient charg- ers. These devices use analog inputs to control charge current and voltage, and can be programmed by the host or hardwired. The MAX1908/MAX8724/MAX8765/ MAX8765A achieve high efficiency using a buck topology with synchronous rectification. The MAX1908/MAX8724/MAX8765/MAX8765A feature input current limiting. This feature reduces battery charge current when the input current limit is reached to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. The MAX1908/MAX8724/MAX8765/MAX8765A provide out- puts to monitor current drawn from the AC adapter (DC input source), battery-charging current, and the pres- ence of an AC adapter. The MAX1908’s conditioning charge feature provides 300mA to safely charge deeply discharged lithium-ion (Li+) battery packs. The MAX1908 includes a conditioning charge feature while the MAX8724/MAX8765/MAX8765A do not. The MAX1908/MAX8724/MAX8765/MAX8765A charge two to four series Li+ cells, providing more than 5A, and are available in a space-saving, 28-pin, thin QFN package (5mm × 5mm). An evaluation kit is available to speed designs. Applications Notebook and Subnotebook Computers Personal Digital Assistants Handheld Terminals Features o ±0.5% Output Voltage Accuracy Using Internal Reference (±0.4% for MAX8765A, 2-/3-Cell Only) o ±4% Accurate Input Current Limiting o ±5% Accurate Charge Current o Analog Inputs Control Charge Current and Charge Voltage o Outputs for Monitoring Current Drawn from AC Adapter Charging Current AC Adapter Presence o Up to 17.6V Battery-Voltage Set Point o Maximum 28V Input Voltage o > 95% Efficiency o Shutdown Control Input o Charge Any Battery Chemistry Li+, NiCd, NiMH, Lead Acid, etc. Low-Cost Multichemistry Battery Chargers ________________________________________________________________ Maxim Integrated Products 1 28 + 27 26 25 24 23 22 IINP CSSP CSSN DHI BST LX DLOV 8 9 10 11 12 13 14 SHDN ICHG ACIN ACOK REFIN ICTL GND 15 16 17 18 19 20 21 7 6 5 4 3 2 1 MAX1908 MAX8724 MAX8765 MAX8765A THIN QFN TOP VIEW Pin Configuration Ordering Information MAX1908 MAX8724 MAX8765 MAX8765A AC ADAPTER INPUT TO EXTERNAL LOAD LDO FROM HOST µP 10 µH 0.015 Ω BATT+ DCIN REFIN VCTL ICTL ACIN ACOK SHDN ICHG IINP CCV CCI CCS CELLS LDO BST DLOV DHI LX DLO PGND CSIP CSIN BATT REF CLS GND CSSP CSSN 0.01 Ω Minimum Operating Circuit 19-2764; Rev 5; 11/09 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. EVALUATION KIT AVAILABLE PART TEMP RANGE PIN-PACKAGE MAX1908ETI+ -40°C to +85°C 28 Thin QFN-EP* MAX8724ETI+ -40°C to +85°C 28 Thin QFN-EP* MAX8765ETI+ -40°C to +85°C 28 Thin QFN-EP* MAX8765AETI+ -40°C to +85°C 28 Thin QFN-EP* + Denotes a lead(Pb)-free/RoHS-compliant package. * EP = Exposed pad. |
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