LTC4162EUFD-FST#PBF datasheet(45/52 Pages) AD

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LTC4162-F

Rev A

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Symbol Name

Command

Code

Access

Bit

Range

Default Description

bat_short_fault_

alert

[0]

Alert that indicates that a bat_short_fault has been detected. This alert bit is cleared by

writing it back to 0 with the remaining bits in this register set to 1s. It can also be cleared

by clearing en_bat_short_fault_alert.

CHARGE_STATUS_

ALERTS_REG

0x38

[5:0]

Alerts that charge_status indicators have occurred. Individual bits are enabled by

EN_CHARGE_STATUS_ALERTS_REG. Writing 0 to any bit clears that alert. Once set,

alert bits remain high until cleared or disabled.

ilim_reg_active_

alert

[5]

Alert that indicates that charge_status is ilim_reg_active. This alert bit is cleared by

writing it back to 0 with the remaining bits in this register set to 1s. It can also be cleared

by clearing en_ilim_reg_active_alert.

thermal_reg_

active_alert

[4]

Alert that indicates that charge_status is thermal_reg_active. This alert bit is cleared

by writing it back to 0 with the remaining bits in this register set to 1s. It can also be

cleared by clearing en_thermal_reg_active_alert.

vin_uvcl_active_

alert

[3]

Alert that indicates that charge_status is vin_uvcl_active. This alert bit is cleared by

writing it back to 0 with the remaining bits in this register set to 1s. It can also be cleared

by clearing en_vin_uvcl_active_alert.

iin_limit_active_

alert

[2]

Alertthatindicatesthatcharge_statusisiin_limit_active.Thisalertbitisclearedbywriting

it back to 0 with the remaining bits in this register set to 1s. It can also be cleared by

clearing en_iin_limit_active_alert.

constant_current_

alert

[1]

Alert that indicates that charge_status is constant_current. This alert bit is cleared by

writing it back to 0 with the remaining bits in this register set to 1s. It can also be cleared

by clearing en_constant_current_alert.

constant_voltage_

alert

[0]

Alert that indicates that charge_status is constant_voltage. This alert bit is cleared by

writing it back to 0 with the remaining bits in this register set to 1s. It can also be cleared

by clearing en_constant_voltage_alert.

SYSTEM_STATUS_

REG

0x39

[8:0]

N/A

Real time system status indicator bits

en_chg

[8]

N/A

Indicates that the battery charger is active.

cell_count_err

[7]

N/A

cell_count_err always indicates true when telemetry is not enabled such as when the

charger is not enabled.

no_rt

[5]

N/A

IndicatesthatnofrequencysettingresistorisdetectedontheRTpin. TheRTpinimpedance

detection circuit will typically indicate a missing RT resistor for values above 1.4MΩ.

no_rt always indicates true when the battery charger is not enabled such as when there

is no input power available.

thermal_shutdown

[4]

N/A

Indicates that the LTC4162 is in thermal shutdown protection due to an excessively high

die temperature (typically 150°C).

vin_ovlo

[3]

N/A

Indicates that input voltage shutdown protection is active due to an input voltage above

its protection shut-down threshold of approximately 38.6V.

vin_gt_vbat

[2]

N/A

Indicates that the VIN pin voltage is sufficiently above the battery voltage to begin a

charge cycle (typically +150mV).

vin_gt_4p2v

[1]

N/A

Indicates that the VIN pin voltage is at least greater than the switching regulator under-

voltage lockout level (4.2V typical).

intvcc_gt_2p8v

[0]

N/A

Indicates that the INTVCC pin voltage is greater than the telemetry system lockout level

(2.8V typical).

vbat

0x3A

[15:0]

Signed number that indicates the A/D measurement for the per-cell battery voltage. The

value is based on the A/D scaling factor for the battery voltage measurement which is

cell_count × 192.4µV/LSB at the BATSENS+ pin.

vin

0x3B

[15:0]

Signed number that indicates the A/D measurement for the input voltage. The value is

basedontheA/Dscalingfactorfortheinputvoltagemeasurementwhichis1.649mV/LSB.

vout

0x3C

[15:0]

SignednumberthatindicatestheA/Dmeasurementforthevoutvoltage.Thevalueisbased

on the A/D scaling factor for the output voltage measurement which is 1.653mV/LSB.

LTC4162EUFD-FST#PBF Datasheet(PDF) 45 Page - Analog Devices

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