Datasheet

Application information: monitoring and protection L6924U
28/37 Doc ID 14716 Rev 2
8.4 Shutdown
The L6924U has a shutdown pin; when the pin is connected to GND, the device is operating.
When the pin is left floating, the device enters the shutdown mode, the consumption from
the input is dramatically reduced to 60 µA (typ.). In this condition, V
REF
is turned OFF.
Figure 21. ST1 and ST2 connection with LEDs or microcontroller
Table 6. Status LEDs Indications
Charge condition Description ST1 ST2
Charge in progress
When the device is in pre-charge or fast-
charge status
ON OFF
Charge done
When the charging current goes below the
I
ENDTH
OFF ON
Stand by mode
When the input voltage goes under
V
BAT
+ 50 mV
OFF OFF
Bad battery temperature
When the voltage on the TH pin is out of
the programmable window, in accordance
with the NTC or PTC thermistor
ON ON
Battery absent When the battery pack is removed ON ON
Over time When T
MAXCH
or T
MAXPRECH
expires ON ON