AXP288D datasheet(56/110 Pages) XPOWER

56 / 110 page

AXP288

PMIC Optimized For Multi-Core High-Performance System

AXP288 Datasheet V1.06

AXP288D)

ELDO1

IPSOUT

1.8V

0.4A

V1P8A( only for

AXP288D)

ALDO3

LDO3

IPSOUT

3.3V

0.2A

V3P3A/S

FLDO1

LDO1

>1.2V

1.25V

0.3A

V1P2SX

FLDO2

LDO2

>1.2V

1.25V

0.1A

V1P2A/S

FLDO3

LDO5

>1.2V

VBUCK4/2

0.03A

VREFDQ

RTCLDO

LDO4

IPSOUT

3.0V

60mA

Always on

RTC

Both VINT and VCC_RTC input from IPSOUT. As long as any of the VBUS or BAT power exists, they will not power down.

VINT output is fixed at 1.8V, while VCC_RTC is fixed at 3.0V.

9.6 ADC

PMIC has a 12Bit SAR ADC. The ADC input range is 0V to 2.0475V, with is 0.5mV/step. Voltage and current ADC has

sampling frequency option of 800/400/200/100Hz. The relationship between input signal and data is listed below:

Table 9-44

Channel function

000H

STEP

FFFH

Condition

BAT voltage (BATSENSE)

0mV

1.1mV

4.5045V

Power On

Current offset

0mA

1mA

4.095A

Charging or power on

BAT discharge current

0mA

1mA

4.095A

Power on

Internal temperature

Charging or Power on

BAT charge current

0mA

1mA

4.095A

Charging or Power on

TS pin input

0mV

0.8mV

3.276V

Charging or Power on

GPIO0 pin input

0mV

0.8mV

3.276V

Power On

Current ADC measured the current through the 10mohm resistor between BATSENSE and LOADSENSE. For internal

temperature, internal logic will do the ADC data comparison with register set warning level for sending over-temperature

alarm or shutdown. To identify the battery current direction, the charge current and discharge current value will be compare

base on status of charger enable, battery present and VBUS present indication.

9.7 Fuel Gauge

The Fuel Gauge comprises 3 modules – Rdc calculation module; OCV (Open Circuit Voltage) and Coulomb counter module;

and calibration module. The Fuel Gauge system is able to export information about battery to application such as Battery

capacity percentage (REG B9H), Battery Voltage (REG 78H, REG 79H), Battery charging current (REG 7AH, REG 7BH), Battery

discharge current (REG 7CH, REG 7DH), Battery maximum capacity (REG E0H, REG E1H), Battery Rdc value (REG BAH, REG BBH).

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