AXP288D datasheet(50/110 Pages) XPOWER

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AXP288

PMIC Optimized For Multi-Core High-Performance System

AXP288 Datasheet V1.06

9.4.3 Timeout activity

Refer to REG 34H, there are 2 timers that can be programmed as charging expire time, REG 34H[7:6] for Pre Charge and

REG 34H[1:0] for Fast Charge Mode. When the actual charge current is less than 20% of the ICHRG, the timer will automatically

hold. When the timer expired, charger will no longer charge with programmed charging current. Instead, it will turn into safe

mode. Under safe mode, charger will always charge the battery with 5mA until VBATSENSE > VTRGT – 0.1V. When the charger

exits from safe mode, it will assert the IRQ. The safe mode status is reflected in REG 01H[3] and SOC can get the mode status

through this bit.

Table 9-29

REG 34H

Bit

Description

R/W

Default

Pre-charge Timer length setting 1

00: 40 minutes; 01: 50 minutes;

10: 60 minutes; 11: 70 minutes.

Pre-charge Timer length setting 0

Fast charge maximum time setting 1

00: 6 hours; 01: 8 hours;

10: 10 hours; 11: 12 hours.

Fast charge maximum time setting 0

Table 9-30

REG 01H

Description

R/W

Default

Bit3

Indicate battery active mode

0-charger is not in battery active mode

1-charger is in battery active mode

There are two ways to reset or exit from safe mode. One is plug out and re-insert the input power source or toggle

charger enable bit.

9.4.4 CHGLED activity

AXP288 provides CHGLED pin. The LED connected to this pin can be used to indicate charger status and input power

sources over voltage alarm. There are two Charge LED modes that can be configured through REG 34H[4] if REG 32H[3] is set

to 1.

Table 9-31

REG 34H

Description

R/W

Default

Bit 4

CHGLED Mode select when REG 32H[3] is 1

0: Type A; 1: Type B

Table 9-30

REG 32H

Description

R/W

Default

Bit 5-4

CHGLED pin control

00: Hi-Z

01: 25% 0.5Hz toggle

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