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AS3606 Datasheet(PDF) 23 Page - ams AG |
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AS3606 Datasheet(HTML) 23 Page - ams AG |
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23 / 71 page 
www.austriamicrosystems.com Revision 1.03 22 - 70 AS3606 AS3607 2v2 Data Sheet - D e t a i l e d D e s c r i p t i o n - P o w e r M anage ment F uncti ons 8.4 Charger This block can be used to charge a 4V Li-Ion accumulator. It supports constant current and constant voltage charging modes with adjustable charging currents (94 to 1000mA) and maximum charging voltage (3.9 to 4.25V). The charger consists basically of a pre-regulator, which limits the current from e.g. the USB input and provides a constant VSUP after reaching EOC (end of charge) and the battery switch, which is controlling the current into the battery. Input Voltage of the pre-regulator: VUSB Output of the pre-regulator and input for the battery switch and system supply: VSUPSW Output of the battery switch and battery terminal: VBATSW CVM (constant voltage), CCM (constant current) and trickle charging Adjustable EOC voltage and EOC current limit Selectable input -, trickle- and charging-current limit Auto-resume with selectable resume voltage level Charger time-out supervision with selectable time-out setting Battery temperature supervision supporting two levels (45 or 50ºC) and 100k or 10k NTC types No battery detection Status register and interrupt generation Per default the USB current limit is set to 470mA and the charger is switched off. The current battery and charger input voltage can be measured with the general purpose ADC. Figure 12. Charger Block Diagram |
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