AXP288D datasheet(54/110 Pages) XPOWER

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AXP288

PMIC Optimized For Multi-Core High-Performance System

AXP288 Datasheet V1.06

Table below is the example by using 10K NTC from Murata (NCP15XH103F03R).

Table 9-40

Temperature

(˚C)

R_NTC (Ω)

TS Pin Voltage (V)

12 bits ADC output code

REG 58H[7:0]

REG 59H[3:0]

-10

40260

3.221

FBH

26490

2.119

A5H

000

0.800

3EH

5840

0.467

24H

4924

0.394

1EH

3550

0.284

16H

There are 2 battery over temperature (OTP) and 2 under temperature (UTP) thresholds can be set to protect the battery

by either controlling the charger or shutdown the system. The first level OTP & UTP thresholds are programmed by REG 38H &

REG 39H. The second level OTP & UTP threshold are programmed by REG 3CH & REG 3DH. When battery temperature is higher

or lower than the first level OTP or UTP threshold, IRQ is asserted, charger will stop charging and REG 01H[6] change to 0 to

reflect the status. When battery temperature is higher or lower than the second level OTP or UTP threshold, IRQ is asserted.

System may or may not shutdown subject to SW decision. There is a hysteresis of 460.8 mV(refer to TS pin voltage) for UTP

threshold, and there is a hysteresis of 57.6 mV for OTP threshold. Every time when the battery temperature comes out from

first level over or under temperature, IRQ is asserted. Charger restores the original charging state and REG 01H[6] change to 1.

In normal case, first level of OTP & UTP thresholds should be set within the second level OTP & UTP thresholds.

Using TS pin current source and obtain TS pin data of the following table:

Table 9-41

Usage condition

setting

Key point

Don’t need temperature protection

TS = GND ， REG 84H[1:0] = 00 ，

（

default 00），REG84H[2] = 1

TS work as GPADC

Temperature protection when in charger

REG 84H[1:0] = 01

Current source on when

charging

Temperature protection when in charging and

discharging

REG 84H[1:0] = 10

TS for GPADC or GPIO

REG 84H[1:0] = 11 when need current

source

REG 84H[1:0] = 00 when not need

current source

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