Datasheet

 2011-2013 Microchip Technology Inc. DS20005049C-page 15
MCP73830/L
5.9 Thermal Shutdown
The MCP73830/L suspends charging if the die tem-
perature exceeds +150°C. Charging will resume when
the die temperature has cooled by approximately
10°C. The thermal shutdown is a secondary safety
feature in the event that there is a failure within the
thermal regulation circuitry.
5.10 Status Indicator
The charge status output of the MCP73830/L is open-
drain, and, as such, has two different states: Low (L),
and High-Impedance (High-Z). The charge status out-
puts can be used to illuminate the LEDs. Optionally,
the charge status output can be used as an interface
to a host microcontroller. The faulty indication of a pre-
conditioning timer also indicates defective batteries,
when it fails to pass preconditioning threshold during
the given time.
Table 5-1 summarizes the state of the status outputs
during a charge cycle.
TABLE 5-1: STATUS OUTPUTS
Charge Cycle State STAT
Shutdown High-Z
No Battery Present High-Z
Preconditioning L
Constant Current Fast Charge L
Constant Voltage L
Charge Complete – Standby High-Z
Timer Fault High-Z
Preconditioning Timer Fault Flashing (2 Hz)