Datasheet

LTC4155
38
4155fc
Table 23. Input Undervoltage Current Limit (Brownout) Status
INPUT UNDERVOLTAGE CURRENT LIMIT
(BROWNOUT) STATUS REG4
SUB ADDRESS 0x04 INPUT_UVCL_ACTIVE
DIRECTION Read
INPUT UNDERVOLTAGE
CURRENT LIMIT STATUS D7 D6 D5 D4 D3 D2 D1 D0
Input UVCL Inactive 0
Input UVCL Active 1
Table 24. Overvoltage Protection Fault
OVERVOLTAGE PROTECTION FAULT REG4
SUB ADDRESS 0x04 OVP_ACTIVE
DIRECTION Read
INPUT OVERVOLTAGE D7 D6 D5 D4 D3 D2 D1 D0
No Fault 0
Input (USB or WALL)
Overvoltage
1
Table 25. USB On-The-Go Step-Up Regulator Fault Shutdown
USB On-The-Go STEP-UP REGULATOR FAULT SHUTDOWN REG4
SUB ADDRESS 0x04 OTG_FAULT
DIRECTION Read
STEP-UP
REGULATOR STATUS D7 D6 D5 D4 D3 D2 D1 D0
No Fault 0
Regulator Over
Current Shutdown
1
Table 26. Battery Unresponsive to Charging
BATTERY UNRESPONSIVE TO CHARGING REG4
SUB ADDRESS 0x04 BAD_CELL
DIRECTION Read
BATTERY STATUS D7 D6 D5 D4 D3 D2 D1 D0
No Fault 0
Low Cell Voltage
Timeout
1
Table 27. NTC Analog-to-Digital Converter Result
NTC ANALOG-TO-DIGITAL CONVERTER RESULT REG5
SUB ADDRESS 0x05 NTCVAL[6:0]
DIRECTION Read
NTC CONVERSION
RESULT D7 D6 D5 D4 D3 D2 D1 D0
NTCVAL[6:0]* ddddddd
See NTC Thermistor Monitor in Operation section to convert ADC result
to temperature.
Table 28. NTC Temperature Out of Range for Battery Charging
NTC TEMPERATURE OUT OF RANGE FOR
BATTERY CHARGING REG5
SUB ADDRESS 0x05 NTC_WARNING
DIRECTION Read
NTC TEMP RANGE D7 D6 D5 D4 D3 D2 D1 D0
Temperature Normal 0
Too Warm or Too
Cold to Charge
1
Table 29. Battery Charger Interrupt Mask
BATTERY CHARGER INTERRUPT MASK REG6
SUB ADDRESS 0x06 ENABLE_CHARGER_INT
DIRECTION Write and Readback
INTERRUPT
ENABLE STATUS D7 D6 D5 D4 D3 D2 D1 D0
Charger Interrupts
Disabled*
0
Charger Interrupts
Enabled
1
*Default.
Interrupt triggered by any change in CHARGER_STATUS[2:0].Any data
written to sub address 0x06 has side effect of clearing any pending
interrupt request.
OPERATION