Datasheet

ManualsBrandsLinear Technology ManualsBattery Charger ICsSuper Capacitor Backup Controller and System Monitor IC QFN

LTC3350

3350fc

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mon_status (0x1C)

Monitor Status: This register provides real time status information about the state of the monitoring system. Each bit is active high.

BIT(S) BIT NAME DESCRIPTION

0 mon_capesr_active Capacitance/ESR measurement is in progress

1 mon_capesr_scheduled Waiting programmed time to begin a capacitance/ESR measurement

2 mon_capesr_pending Waiting for satisfactory conditions to begin a capacitance/ESR measurement

3 mon_cap_done Capacitance measurement has completed

4 mon_esr_done ESR Measurement has completed

5 mon_cap_failed The last attempted capacitance measurement was unable to complete

6 mon_esr_failed The last attempted ESR measurement was unable to complete

7 – Reserved

8 mon_power_failed This bit is set when V

falls below the PFI threshold or the charger is unable to

charge. It is cleared only when power returns and the charger is able to charge.

9 mon_power_returned This bit is set when the input is above the PFI threshold and the charger is able to

charge. It is cleared only when mon_power_failed is set.

15:10 – Reserved

alarm_reg (0x1D)

Alarms Register: A one in any bit in the register indicates its respective alarm has triggered. All bits are active high.

BIT(S) BIT NAME DESCRIPTION

0 alarm_cap_

uv Capacitor under

voltage alarm

1 alarm_cap_ov Capacitor overvoltage alarm

2 alarm_gpi_uv GPI undervoltage alarm

3 alarm_gpi_ov GPI overvoltage alarm

4 alarm_vin_uv V

undervoltage alarm

5 alarm_vin_ov V

overvoltage alarm

6 alarm_vcap_uv V

CAP

undervoltage alarm

7 alarm_vcap_ov V

CAP

overvoltage alarm

8 alarm_vout_uv V

OUT

undervoltage alarm

9 alarm_vout_ov V

OUT

overvoltage alarm

10 alarm_iin_oc Input overcurrent alarm

11 alarm_ichg_uc Charge undercurrent alarm

12 alarm_dtemp_cold Die temperature cold alarm

13 alarm_dtemp_hot Die temperature hot alarm

14 alarm_esr_hi ESR high alarm

15 alarm_cap_lo Capacitance low alarm

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