WM8352 datasheet(162/336 Pages) WOLFSON

162 / 336 page

WM8352

Production Data

PD, February 2011, Rev 4.4

162

The register control fields for Fast Charging are described in Table 106. See Section 17.7.5 for

details of battery charger termination.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R25 (15h)

Interrupt Status

CHG_FAST_R

DY_EINT

Indicates that the charger is ready to go

into fast charge.

(Rising Edge triggered)

Note: This bit is cleared once read.

R168 (A8h)

Battery charger

control 1

CHG_FAST

Enable fast charging.

0 = Fast charging cannot take place.

1 = Enable fast charging (will not start

until valid charging conditions are met).

Note: This register is held low and can

only be written to once the fast charge

ready signal has gone high.

Protected by security key.

CHG_FAST_U

SB_THROTTL

Enable USB current throttling in fast

charge:

0 = Don't do any current throttling when

fast charging.

1 = Do current throttle while fast

charging.

Protected by security key.

R169 (A9h)

Battery charger

control 2

3:0

CHG_ISEL

[3:0]

0110

Fast charge current limit setting.

0000 = off

0001 = 50mA

0010 = 100mA

… (50mA steps)

1111 = 750mA

Note: Do not set the charger to be more

than 400mA when USB powered.

Protected by security key.

R170 (AAh)

Battery

Charger

Control 3

6:5

CHG_THROTT

LE_T [1:0]

Time between steps when the charger

throttles back due to USB current limit.

00 = 8us

01 = 16us

10 = 32us

11 = 128us

Protected by security key.

Table 106 Fast Charging Control

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