AXP288D datasheet(48/110 Pages) XPOWER

48 / 110 page

AXP288

PMIC Optimized For Multi-Core High-Performance System

AXP288 Datasheet V1.06

When REG 2CH[0] is set to 1, battery charger detection module will start to operate. Upon completion of the BC detection

(REG 2CH[2] = 0), AXP288 will automatically update the detection result onto REG 2FH[7:5]. If the BC detection result indicate

SDP, the current limit will be set to 500mA (900mA if it is USB 3) or else the current limit will follow the setting in REG

30H[1:0].

9.2.4 VBUS input overvoltage protection

VBUS to IPSOUT path have a regulator, target of 5.0V:

Table 9-27

Input power

IPSOUT

CHGLED

Contents

>7V

Floating

PMIC shutdown

>6.3V

2Hz toggle

Work normally

>5.06V

Charge LED

<5.06

Vin-0.06V

Charge LED

<3.5V

Vin-0.06V

Charge LED

Invalid

9.2.5 VBUS insertion power up condition

The PMIC will start the boot sequence at the point of VBUS insertion. A VBUS insertion is detected from a rising voltage

on the VBUS node as long as it is larger than 4.1V. The existence of VBUS is stored in REG 00H[5]. The charger will start

charging immediately and automatically. If the battery level is above the battery boot threshold, the PMIC will continue the

boot process, otherwise the charger will continue charging until the battery boot threshold is reached, at this point the PMIC

will continue the boot process. Please refer to Section 9.1 for detail flow chart.

9.3 BC Detection Module

This section is primarily based on battery charging specification, for more information please refer to BC rev1.2

specifications. AXP288 is compatible with BC rev1.2 and can identify SDP/CDP/DCP except ACA The PMIC can detect the device

type without software activity.

Table 9-28

Device

Description

Compatible

SDP

Standard Downstream Port

PMIC can identify

CDP

Charging Downstream Port

PMIC can identify

DCP

Dedicated Charging Port

PMIC can identify

ACA

Accessory Charger Adapter

PMIC can’t identify

Please refer to REG36H for detailed information.

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