AS3543 datasheet(40/92 Pages) AMSCO

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AS3543 3v2

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 a n a g e m e n t F u n c t i o n s

9.3.5

9.4

Charger

9.4.1

General

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 (55 to 460mA) and maximum charging voltage (3.9 to 4.25V).

An internal protection circuit will limit the charging current when a CHGIN voltage drop is detected.

For the end of charge current four levels can be selected while the battery temperature shutdown has two temperature

levels to choose from.

The current battery voltage as well as the actual charging current can be measured with the general purpose ADC.

Figure 27. Charger Block Diagram

Table 25. DCDC15 Related Register

Name

Base

Offset

Description

In_Cntr

2-wire serial

1Ah-4

Selection of external dimming input

DCDC15

2-wire serial

1Bh-1

DCDC15 on/off and dimming control

ISINK1

2-wire serial

1Bh-2

ISINK1 current settings

ISINK2

2-wire serial

1Bh-3

ISINK2 current settings

PMU_Enable

2-wire serial

1Ch

Enables writings to extended registers 1Ah1, 1Bh-1 to 1Bh-3

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