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MAX8731A

Maxim Integrated Products
Part Number MAX8731A
Manufacturer Maxim Integrated Products
Description SMBus Level 2 Battery Charger
Published Sep 4, 2008
Detailed Description 19-0756; Rev 0; 1/07 KIT ATION EVALU E L B A IL AVA SMBus Level 2 Battery Charger with Remote Sense General Descriptio...
Datasheet PDF File MAX8731A PDF File

MAX8731A
MAX8731A

Overview
19-0756; Rev 0; 1/07 KIT ATION EVALU E L B A IL AVA SMBus Level 2 Battery Charger with Remote Sense General Description The MAX8731A is an SMBus™ programmable multichemistry battery charger.
The MAX8731A uses a minimal command set to easily program the charge voltage, charge current, and adapter current limit.
The MAX8731A charges one to four Li+ series cells and delivers up to 8A charge current.
The MAX8731A drives n-channel MOSFETs for improved efficiency and reduced cost.
Low-offset current-sense amplifiers prowww.
DataSheet4U.
com vide high accuracy with 10mΩ sense resistors.
The MAX8731A current-sense amplifiers provide high accuracy (3% at 3.
5A) and also provide fast cycle-bycycle current-mode control to protect against battery short circuit and system load transients.
The charger employs dual remote sense, which reduces charge time by measuring the feedback voltage directly at the battery, improving accuracy of initial transition into constant-voltage mode.
The MAX8731A provides 0.
5% battery voltage accuracy directly at the battery terminal.
The MAX8731A provides a digital output that indicates the presence of the AC adapter, as well as an analog output that indicates the adapter current within 4% accuracy.
The MAX8731A is available in a small 5mm x 5mm, 28-pin, thin (0.
8mm) QFN package.
An evaluation kit is available to reduce design time.
The MAX8731A is available in a lead-free package.
SMBus is a trademark of Intel Corp.
Features ♦ ♦ ♦ ♦ ♦ 0.
5% Battery Voltage Accuracy 3% Input Current-Limit Accuracy 3% Charge-Current Accuracy SMBus 2-Wire Serial Interface Cycle-by-Cycle Current Limit Battery Short-Circuit Protection Fast Response for Pulse Charging Fast System-Load-Transient Response Dual-Remote-Sense Inputs Monitor Outputs for Adapter Current (4% Accuracy) AC Adapter Detection 11-Bit Battery Voltage Setting 6-Bit Charge-Current/Input-Current Setting 8A (max) Battery Charger Current 11A (max) Input Current +8V to +26V Input Voltage Range Charges Li+, Ni...


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