AS3607 datasheet(23/71 Pages) AMSCO

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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

AS3607 数据表(PDF) 23 Page - ams AG