1.6A Dynamic Battery Charger and Power Manager General Description
The AAT3670 BatteryManager is a highly integrated sin...
1.6A Dynamic Battery Charger and Power Manager General Description
The AAT3670 BatteryManager is a highly integrated single-cell lithium-ion/polymer (Li-ion) battery charger and system power management IC that enables simultaneous battery charging and full system usage without compromising the battery's charge cycle life. It operates with low-
voltage AC adapter (ADP) and USB inputs and requires a minimum number of external components. The AAT3670 selects ADP or USB to power the system load and charge the battery when ADP/USB power is available. The AAT3670 precisely regulates battery charge
voltage and current for 4.2V Li-ion cells. Charge current can be programmed up to 1.6A for ADP charging and 0.9A or 0.1A for USB charging by resistors on the ADPSET/ USBSET pins. The charge termination current threshold is set by an external resistor on the TERM pin. The AAT3670 has a
voltage-sensed charge current reduction loop that enables system operation without a power shortage. When the input
voltage falls below the programmable charge reduction threshold, the device automatically reduces the charge current until the input
voltage returns to the threshold
voltage.
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AAT3670
Features
BatteryManagerâ„¢
ADP, USB, or Battery Powers System Load Through Internal Current-Limited Switches Simultaneous Battery Charging and System Usage
Voltage Sensed Charge Reduction Loop to Minimize Charge Time, Even While the System Operates Digitized Thermal Lo...