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MAX1908 Dataheets PDF



Part Number MAX1908
Manufacturers Maxim Integrated Products
Logo Maxim Integrated Products
Description Low-Cost Multichemistry Battery Chargers
Datasheet MAX1908 DatasheetMAX1908 Datasheet (PDF)

19-2764; Rev 5; 11/09 KIT ATION EVALU E L B A AVAIL www.DataSheet4U.com Low-Cost Multichemistry Battery Chargers General Description The MAX1908/MAX8724/MAX8765/MAX8765A highly integrated, multichemistry battery-charger control ICs simplify the construction of accurate and efficient chargers. 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 .

  MAX1908   MAX1908



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19-2764; Rev 5; 11/09 KIT ATION EVALU E L B A AVAIL www.DataSheet4U.com Low-Cost Multichemistry Battery Chargers General Description The MAX1908/MAX8724/MAX8765/MAX8765A highly integrated, multichemistry battery-charger control ICs simplify the construction of accurate and efficient chargers. 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 outputs to monitor current drawn from the AC adapter (DC input source), battery-charging current, and the presence 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. 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. MAX1908/MAX8724/MAX8765/MAX8765A Ordering Information PART MAX1908ETI+ MAX8724ETI+ MAX8765ETI+ MAX8765AETI+ TEMP RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PIN-PACKAGE 28 Thin QFN-EP* 28 Thin QFN-EP* 28 Thin QFN-EP* 28 Thin QFN-EP* Applications Notebook and Subnotebook Computers Personal Digital Assistants Handheld Terminals Minimum Operating Circuit AC ADAPTER INPUT 0.01Ω TO EXTERNAL LOAD +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Pin Configuration TOP VIEW CELLS PGND VCTL 15 14 13 12 GND ICTL CELLS DCIN REFIN VCTL ICTL ACIN ACOK FROM HOST µP SHDN ICHG IINP CCV CCI CCS REF CLS CSIN BATT GND BST DLOV LDO 21 DLOV LX DHI LX 20 19 18 17 16 LDO 22 23 24 25 26 27 28 MAX1908 MAX8724 MAX8765 MAX8765A BST DHI BATT CSSP CSSN CSIN CSIP DLO REFIN ACOK ACIN DLO 10µH PGND CSSN CSSP CSIP 0.015Ω MAX1908 MAX8724 MAX8765 MAX8765A 11 10 9 8 ICHG SHDN IINP BATT+ + 1 DCIN 2 LDO 3 CLS 4 REF 5 CCS 6 CCI 7 CCV THIN QFN ________________________________________________________________ Maxim Integrated Products 1 For .


MAX8765 MAX1908 LM2746


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