Tele_Iout; Tele_Iin; Tele_Vbat - Analog Devices LINEAR LT8491 Manual

LT8491
2
I C REGISTER DESCRIPTIONS

TELE_IOUT

2
I C REG ADDRESS BIT(S)
0x08 [15:0]
This register contains the most recently measured current flowing out of the charger through the R
value is in milliamps in an unsigned integer format. TELE_IOUT can be converted to Amps by casting it to a floating-
point value and dividing the result by 1000. To determine TELE_IOUT, the LT8491 measures the voltage at the IOR pin
which is proportional to the output current as discussed in the HW Config: Output Current Sense and Limit section.
Calculation of TELE_IOUT requires that non-zero values are in the CFG_RIMON_OUT and CFG_RSENSE2 registers.
The contents of these registers must match the hardware values on the PCB to achieve the correct TELE_IOUT values.
Reading 0xFFFF from TELE_IOUT indicates that one or more of the required configuration registers was set to 0x0000.
Related Data Sheet Sections: Telemetry Operation, HW Config: Output Current Sense and Limit

TELE_IIN

2
I C REG ADDRESS BIT(S)
0x0A [15:0]
This register contains the most recently measured current flowing into the charger through the R
value is in milliamps in an unsigned integer format. TELE_IIN can be converted to Amps by casting it to a floating-point
value and dividing the result by 1000. To determine TELE_IIN, the LT8491 measures the voltage at the IIR pin which
is proportional to the input current as discussed in the HW Config: Input Current Sense and Limit section.
Calculation of TELE_IIN requires that a non-zero value is in the CFG_RSENSE1 register. The contents of this register
must match the hardware value on the PCB to achieve the correct TELE_IIN value. Reading 0xFFFF from TELE_IIN
indicates that CFG_RSENSE1 was set to 0x0000.
Related Data Sheet Sections: Telemetry Operation, HW Config: Input Current Sense and Limit

TELE_VBAT

2
I C REG ADDRESS BIT(S)
0x0C [15:0]
This register contains the most recently measured V
multiplied by 100 in an unsigned integer format. TELE_VBAT can be converted to volts by casting it to a floating-point
value and dividing the result by 100.
Proper reporting of TELE_VBAT requires that non-zero values are in the following telemetry configuration registers:
CFG_RDACO, CFG_RFBOUT1, CFG_RFBOUT2. The contents of these registers must match the hardware values on
the PCB to achieve the correct TELE_VBAT values. The reset default value of TELE_VBAT is 0x0000 indicating that the
voltage has not yet been measured. Reading 0xFFFF from TELE_VBAT indicates one or more of the required configura-
tion registers was set to 0x0000.
Related Data Sheet Sections: Telemetry Operation, HW Config: V
32
UNITS FORMAT
Milliamps Unsigned Integer
UNITS FORMAT
Milliamps Unsigned Integer
UNITS FORMAT
Volts • 100 Unsigned Integer 27.42V = 0x0AB6 Charger V
For more information
EXAMPLES DESCRIPTION
5.274A = 0x149A Output current to V
0.039A = 0x0027
EXAMPLES DESCRIPTION
5.274A = 0x149A Input current from V
0.039A = 0x0027
EXAMPLES DESCRIPTION
BAT
voltage as measured at the FBOR pin. The value is in Volts
BAT
in Stage 2 (V
BAT
www.analog.com
.
BAT
SENSE2
.
IN
SENSE1
output voltage.
)
S2
resistor. The
resistor. The
Rev. 0