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AXP288D 데이터시트(PDF) 52 Page - Shenzhen X-Powers Technology Co ., Ltd

부품명 AXP288D
상세설명  PMIC Optimized For Multi-Core High-Performance System
PDF  110 Pages
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AXP288D 데이터시트(HTML) 52 Page - Shenzhen X-Powers Technology Co ., Ltd

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AXP288
PMIC Optimized For Multi-Core High-Performance System
AXP288 Datasheet V1.06
Copyright © 2014 X-Powers Limited. All Rights Reserved.
52
9.4.6 Temperature protection
AXP288 has built in thermal protection for the IC itself with 3 levels of warning. Each warning level has 6.8˚C different in
threshold compare to the next level and each warning level has hysteresis gap of 13.6˚C. Below are the charger responses with
respect to each thermal warning level.
Table 9-33
Warning
AXP288 Response
Level 1
Once the IC temperature exceeds this level, charger will charge at minimum charging current.
When IC temperature drops below hysteresis limit, charger will automatically go back to its
original charging state.
Level 2
If IC temperature continue to rise and exceeds this level, charger will continue to charge at
minimum charging current. Charge LED will provide indication according to Table 9-31. If IRQ is
enabled in REG43H[7], IRQ will be asserted and its status can be read from REG 01H[7].
Level 3
If IC temperature exceeds this level, all the behavior is the same as level 2 but if REG8FH[2] is
set to 1, IC will automatically shut down.
Table 9-34
REG 43H
Bit
Description
R/W
Default
7
The PMIC temperature over the warning level 2 IRQ (OTIRQ) enable
RW
0
Table 9-35
REG 01H
Bit
Description
R/W
Default
7
Indication PMIC die over temperature or not
0: not over temperature; 1: over temperature
R
0
Table 9-36
REG 8FH
Description
R/W
Default
Bit 2
The PMIC shut down or not when Die temperature is over the warning
level 3
0-not shut down
1-shut down
RW
0
Beside built in IC thermal protection, AXP288 has the capability to sense one external thermal sensor (for battery
temperature) through TS pin.



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