LTC4162EUFD-FSTM#PBF datasheet(41/52 Pages) AD

41 / 52 page

LTC4162-F

Rev A

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Symbol Name

Command

Code

Access

Bit

Range

Default Description

jeita_t3

0x21

R/W

[15:0]

7970

Signed number that sets the JEITA temperature region transition temperature T3 between

JEITA regions R3 and R4. The temperature is based on the thermistor reading from the

telemetrysystem;RNTC=RNTCBIAS×(21829-thermistor_voltage)/thermistor_voltage.

Recall that the thermistor has a negative temperature coefficient so jeita_t1, representing

colder temperatures, will have the highest value and jeita_t6, representing warmer

temperatures, will have the lowest value. The default value of 7970 maps to about 40°C

for the expected thermistor β value of 3490K.

jeita_t4

0x22

R/W

[15:0]

7112

Signed number that sets the JEITA temperature region transition temperature T4 between

JEITA regions R3 and R4. The temperature is based on the thermistor reading from the

telemetrysystem;RNTC=RNTCBIAS×(21829-thermistor_voltage)/thermistor_voltage.

Recall that the thermistor has a negative temperature coefficient so jeita_t1, representing

colder temperatures, will have the highest value and jeita_t6, representing warmer

temperatures, will have the lowest value. The default value of 7112 maps to about 45°C

for the expected thermistor β value of 3490K.

jeita_t5

0x23

R/W

[15:0]

6325

Signed number that sets the JEITA temperature region transition temperature T5 between

JEITA regions R5 and R6. The temperature is based on the thermistor reading from the

telemetrysystem;RNTC=RNTCBIAS×(21829-thermistor_voltage)/thermistor_voltage.

Recall that the thermistor has a negative temperature coefficient so jeita_t1, representing

colder temperatures, will have the highest value and jeita_t6, representing warmer

temperatures, will have the lowest value. The default value of 6325 maps to about 50°C

for the expected thermistor β value of 3490K.

jeita_t6

0x24

R/W

[15:0]

4970

Signed number that sets the JEITA temperature region transition temperature T6 between

JEITA regions R6 and R7. The temperature is based on the thermistor reading from the

telemetrysystem;RNTC=RNTCBIAS×(21829-thermistor_voltage)/thermistor_voltage.

Recall that the thermistor has a negative temperature coefficient so jeita_t1, representing

colder temperatures, will have the highest value and jeita_t6, representing warmer

temperatures, will have the lowest value. The default value of 4970 maps to about 60°C

for the expected thermistor β value of 3490K.

VCHARGE_

JEITA_6_5_REG

0x25

R/W

[9:0]

103

vcharge_setting values for JEITA temperature regions jeita_t6 and jeita_t5

vcharge_jeita_6

[9:5]

SetsthechargevoltagetobeusedinJEITAregion6asillustratedintheJEITATemperature

QualifiedChargingsection.Thevaluecorrespondstovcharge_settingandcanbecalculated

using vcharge_jeita_6 × 12.5mV + 3.4125V. The default value of 3 corresponds to 3.45V.

vcharge_jeita_5

[4:0]

SetsthechargevoltagetobeusedinJEITAregion5asillustratedintheJEITATemperature

QualifiedChargingsection.Thevaluecorrespondstovcharge_settingandcanbecalculated

using vcharge_jeita_5 × 12.5mV + 3.4125V. The default value of 7 corresponds to 3.5V.

VCHARGE_

JEITA_4_3_2_REG

0x26

R/W

[14:0]

7663

vcharge_setting values for JEITA temperature regions jeita_t4, jeita_t3, and jeita_t2

vcharge_jeita_4

[14:10] 7

SetsthechargevoltagetobeusedinJEITAregion4asillustratedintheJEITATemperature

QualifiedChargingsection.Thevaluecorrespondstovcharge_settingandcanbecalculated

using vcharge_jeita_4 × 12.5mV + 3.4125V. The default value of 7 corresponds to 3.5V.

vcharge_jeita_3

[9:5]

SetsthechargevoltagetobeusedinJEITAregion3asillustratedintheJEITATemperature

QualifiedChargingsection.Thevaluecorrespondstovcharge_settingandcanbecalculated

using vcharge_jeita_3 × 12.5mV + 3.4125V. The default value of 15 corresponds to 3.6V.

vcharge_jeita_2

[4:0]

SetsthechargevoltagetobeusedinJEITAregion2asillustratedintheJEITATemperature

QualifiedChargingsection.Thevaluecorrespondstovcharge_settingandcanbecalculated

using vcharge_jeita_2 × 12.5mV + 3.4125V. The default value of 15 corresponds to 3.6V.

ICHARGE_

JEITA_6_5_REG

0x27

R/W

[9:0]

495

charge_current_setting values for JEITA temperature regions jeita_t6 and jeita_t5

icharge_jeita_6

[9:5]

SetsthechargecurrenttobeusedinJEITAregion6asillustratedintheJEITATemperature

Qualified Charging section. The value corresponds to charge_current_setting where the

charge current can be calculated using (icharge_jeita_6 + 1) × 1mV / RSNSB. The default

valueof15correspondstoaVCSP-VCSNservovoltageof16mVwhichishalfscaleorC/2.

LTC4162EUFD-FSTM#PBF Datasheet(PDF) 41 Page - Analog Devices

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