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LTC3350_15 Datasheet, PDF (37/46 Pages) Linear Technology – High Current Supercapacitor Backup Controller and System Monitor
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LTC3350
Register Descriptions
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 VIN 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 undervoltage 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
5
alarm_vin_ov
6
alarm_vcap_uv
7
alarm_vcap_ov
8
alarm_vout_uv
9
alarm_vout_ov
10
alarm_iin_oc
VIN undervoltage alarm
VIN overvoltage alarm
VCAP undervoltage alarm
VCAP overvoltage alarm
VOUT undervoltage alarm
VOUT overvoltage alarm
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
For more information www.linear.com/LTC3350
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