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MAX8731

Maxim Integrated Products
Part Number MAX8731
Manufacturer Maxim Integrated Products
Description SMBus Level 2 Battery Charger
Published Mar 12, 2007
Detailed Description www.DataSheet4U.com 19-3923; Rev 0; 1/06 KIT ATION EVALU E L B A IL AVA SMBus Level 2 Battery Charger with Remote Sen...
Datasheet PDF File MAX8731 PDF File

MAX8731
MAX8731

Overview
www.
DataSheet4U.
com 19-3923; Rev 0; 1/06 KIT ATION EVALU E L B A IL AVA SMBus Level 2 Battery Charger with Remote Sense General Description The MAX8731 is an SMBus™ programmable multichemistry battery charger.
The MAX8731 uses a minimal command set to easily program the charge voltage, charge current, and adapter current limit.
The MAX8731 charges one to four Li+ series cells and delivers up to 8A charge current.
The MAX8731 drives n-channel MOSFETs for improved efficiency and reduced cost.
Low-offset current-sense amplifiers provide high accuracy with 10mΩ sense resistors.
The MAX8731 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 MAX8731 provides 0.
5% battery voltage accuracy directly at the battery terminal.
The MAX8731 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 MAX8731 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 MAX8731 is available in lead-free packages.
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+, NiMH, and N...


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