AQ120
Battery Charger Controller
SOT23-5 and SC70-5 Package
Preliminary Specification
Revision 1.8
April 1, 2006
General Description
The AQ120 is a low cost linear battery
charger controller with similar features to
the industry standard “1734” style
controller, but with the extra ability to
charge multiple cell Lithium Ion batteries
as well as NiCad types. In addition, the
maximum Vin is 18 volts. The AQ120
flexibility allows the setting of the charge
voltage and current with a minimum
number of external components.
The open collector output is capable of
driving an external PNP transistor. A
temperature stable bandgap reference
(1.25 V) controls the maximum output
voltage, while a current control circuit
sets a constant charging current.
Applications
•
Battery chargers
Features
•
1.25V reference with 1% accuracy
•
Multiple cell compatible
•
Programmable charge current
•
Low current consumption
•
Offered in ultra small SC70-5 package
•
No blocking diode required
•
Wide Vin range: 2.5V to 18V
•
25mA drive current sink
•
No battery drain in shutdown
•
Sleep mode with input supply removal
•
RoHS compliant
available
Pin Configuration
Block Diagram
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AQ120
ACUTECH [ ACUTECHNOLOGY SEMICONDUCTOR ]
