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ISL9241 Operation Modes Application Note
From State
To State
RTB
BAT
RTB +
BAT
CHRG
BAT
NVDC
1. The register values shown are an example. Modify these values for your platform.
R16AN0002EU0300 Rev.3.00
Jan 6, 2022
Table 4. Adapter Removal Events
Step
Number
Function Description
Monitor ACOK – complete the
following steps before connecting
another adapter
1
Disable Force Forward
Buck/Reverse Boost bit
2
Turn off BYPSG, turn on NGATE,
disable charge pump 100% and
disable V
<V
IN
OUT
disable Reverse Turbo Boost
3
Disable ADC
4
BGATE to Normal operation
5
Reset ACOKref register to
normal value to detect low
voltage (5V or 9V) adapter during
next plug in event
Monitor ACOK – complete the
following steps before connecting
another adapter
1
Disable Force Forward
Buck/Reverse Boost bit
2
Set Charge Current to 0 to
disable fast charging
3
Set MinSysVoltage to 0 to
disable trickle charging
4
Turn off BYPSG, turn on NGATE,
disable charge pump 100% and
disable V
<V
IN
OUT
5
Disable ADC
6
BGATE to Normal operation
7
Reset ACOKref register to
normal value to detect low
voltage (5V or 9V) adapter during
next plug in event
Monitor ACOK – when ACOK
goes High, automatically
transition to NVDC
[1]
(Cont.)
Register Name
Control 4
Control 0
comparator,
Control 3
Control 1 <6>
ACOKREF
Control 4
ChargeCurrentLimit
MinSysVoltage
Control 0
comparator
Control 3
Control 1 <6>
ACOKREF
Value
(Decimal)
0
0
300
0
3.6V or desired
level
0
0
0
0
300
0
3.6V or desired
level
-
-
Register
Address
0x4E
0x39
0x4C
0x3C
0x40
0x4E
0x14
0x3E
0x39
0x4C
0x3C
0x40
-
Page 13
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