Cfg_Rfbin2; Cfg_Rfbin1; Configure Initial Charger Enable; Cfg_Init_Chrg_En - Analog Devices LINEAR LT8491 Manual

2
I C REGISTER DESCRIPTIONS

CFG_RFBIN2

2
I C REG ADDRESS BIT(S)
0x36 [15:0]
The LT8491 uses this register value to calculate telemetry for the TELE_VIN register. It is also used to calculate telemetry
for TELE_PIN and TELE_EFF when powered by a DC power supply. CFG_RFBIN2 is not used for any other purpose
and does not affect charging in any way. Write this register to indicate value of R
network. The value written to this register should be R
See the examples above. The default value is 0x0000 indicating that this value has not been configured.
Related Data Sheet Section: See HW Config: Input Voltage Sensing and Modulation for information about R

CFG_RFBIN1

2
I C REG ADDRESS BIT(S)
0x38 [15:0]
The LT8491 uses this register value to calculate telemetry for the TELE_VIN register. It is also used to calculate telem-
etry for TELE_PIN and TELE_EFF when powered by a DC power supply. This register value is not used for any other
purpose and does not affect charging in any way. Write this register to indicate value of R
divider network. The value written to this register should be R
See the examples above. The default value is 0x0000 indicating that this value has not been configured.
Related Data Sheet Section: See HW Config: Input Voltage Sensing and Modulation for information about R

CONFIGURE INITIAL CHARGER ENABLE

Table 13. Summary of Register to Configure Initial Charger Enable
REGISTER NAME SIZE

CFG_INIT_CHRG_EN

BYTE
CFG_INIT_CHRG_EN
2
I C REGISTER
ADDRESS BIT NAME
0x3A Reserved
INIT_CHRG_EN
This register value is used to automatically start the charger only if CRC error checking passes during the startup
sequence. A user value of 0x01 automatically starts the charger, or a user value of 0x00 means the charger does not
start automatically.
Related Data Sheet Sections: Startup Sequence
UNITS FORMAT
kΩ • 100 Unsigned Integer
UNITS FORMAT
kΩ • 10 Unsigned Integer
2 2
I C REGISTER I C BOOT READ
ADDRESS ADDRESS
0x3A 0x9A
BIT(S) DESCRIPTION
[7:1] Reserved
[0] Value of this bit is copied to CTRL_CHRG_EN during the startup sequence if CRC error checking passes.
For more information
EXAMPLES DESCRIPTION
10kΩ = 0x03E8 Value of R
FBIN2
20kΩ = 0x07D0 Also required for TELE_PIN and TELE_EFF telemetry when
powered by a DC power supply.
, in kΩ multiplied by 100 in an unsigned integer format.
FBIN2
EXAMPLES DESCRIPTION
442kΩ = 0x1144 Value of R
FBIN1
274kΩ = 0x0AB4 TELE_PIN, TELE_EFF.
, in k multiplied by 10 in an unsigned integer format.
FBIN1
DESCRIPTION
Configures automatic start of charger.
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LT8491
. Required to calculate telemetry for TELE_VIN.
in the input feedback divider
FBIN2
. Required to calculate telemetry for TELE_VIN,
in the input feedback
FBIN1
FBIN2
FBIN1
REF
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