Service Manuals, User Guides, Schematic Diagrams or docs for : . Electronic Components Datasheets Various MAX8731AETI - SMBus Level 2 Battery Charger with Remote Sense

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19-0756; Rev 0; 1/07
                    KIT
              ATION
         EVALU
           AVA ILABLE



                                                      SMBus Level 2 Battery Charger
                                                                with Remote Sense
                                      General Description                                                                             Features




                                                                                                                                                                 MAX8731A
The MAX8731A is an SMBusTM programmable multi-                                             0.5% Battery Voltage Accuracy
chemistry battery charger. The MAX8731A uses a mini-                                       3% Input Current-Limit Accuracy
mal command set to easily program the charge voltage,
                                                                                           3% Charge-Current Accuracy
charge current, and adapter current limit.
                                                                                           SMBus 2-Wire Serial Interface
The MAX8731A charges one to four Li+ series cells and
delivers up to 8A charge current. The MAX8731A drives                                      Cycle-by-Cycle Current Limit
n-channel MOSFETs for improved efficiency and                                                 Battery Short-Circuit Protection
reduced cost. Low-offset current-sense amplifiers pro-                                        Fast Response for Pulse Charging
vide high accuracy with 10m sense resistors.                                                  Fast System-Load-Transient Response
The MAX8731A current-sense amplifiers provide high                                         Dual-Remote-Sense Inputs
accuracy (3% at 3.5A) and also provide fast cycle-by-
cycle current-mode control to protect against battery                                      Monitor Outputs for
short circuit and system load transients.                                                     Adapter Current (4% Accuracy)
                                                                                              AC Adapter Detection
The charger employs dual remote sense, which reduces
charge time by measuring the feedback voltage directly                                     11-Bit Battery Voltage Setting
at the battery, improving accuracy of initial transition into                              6-Bit Charge-Current/Input-Current Setting
constant-voltage mode. The MAX8731A provides 0.5%                                          8A (max) Battery Charger Current
battery voltage accuracy directly at the battery terminal.
                                                                                           11A (max) Input Current
The MAX8731A provides a digital output that indicates
the presence of the AC adapter, as well as an analog out-                                  +8V to +26V Input Voltage Range
put that indicates the adapter current within 4% accuracy.                                 Charges Li+, NiMH, and NiCd Battery Chemistries
The MAX8731A is available in a small 5mm x 5mm,                                                                      Ordering Information
28-pin, thin (0.8mm) QFN package. An evaluation kit is
available to reduce design time. The MAX8731A is avail-                                                                       PIN-                PKG
able in a lead-free package.                                                                   PART            TEMP RANGE
                                                                                                                              PACKAGE             CODE
SMBus is a trademark of Intel Corp.                                                                                           28 Thin QFN
                                                                   Applications         MAX8731AETI+       -40

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