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