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AXP209 数据表(PDF) 21 Page - List of Unclassifed Manufacturers

部件名 AXP209
功能描述  Enhanced single Cell Li-Battery and Power System Management IC
PDF  45 Pages
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制造商  ETC2 [List of Unclassifed Manufacturers]
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标志 ETC2 - List of Unclassifed Manufacturers

AXP209 数据表(HTML) 21 Page - List of Unclassifed Manufacturers

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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
In non-precharge mode, if the charge cycle is not ending after 480 minutes (adjustable, refer to
register “REG34H”), the charger will automatically enter the battery activate mode.
Battery activation mode
At the entering the battery activation mode from either pre-charge mode or constant current mode (the
timer expires), AXP209 will issue IRQ10 in both cases to indicate that the battery may be
damaged/faulty. In battery activate mode, the charger always inputs relatively low current to batteries.
AXP209 will exit activate mode and release IRQ11 only if the battery voltage has reached VRCH.
AXP209 will indicate whether the charger is in battery activate mode or not in register REG01H.
CHGLED
CHGLED pin is used to indicate charge state and warning. There are four states, namely, charging,
not charging, battery abnormal warning, and external power over-voltage warning. CHGLED is NMOS
Open Drain output, so a LED can be directly driven by a current-limit resistor to show the four states.
The following table has displayed its two operation modes.
REG34H
[4]
Status
CHGLED
State
Comments
0
Charging
Low
Not
charging
Hi Z
Battery
abnormal
1Hz
Flashing
The charger enters the battery activate mode, or
the battery temperature is too high/low.
Overvoltage
4Hz
Flashing
External power input voltage is too high
1
Charging
1Hz
Flashing
Can not be
charged
Hi
No external power supply
Not
charging
Low
Overvoltage
4Hz
Flashing
External power input voltage is too high, or the
battery temperature is too high, too low
Battery temperature detection
The AXP209 can connect a temperature-sensitive resistor via the TS pin to monitor the battery
temperature when the battery is charging or discharging. The diagram is shown below.
Confidential
Page 21/45



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