Datasheet

Application information: monitoring and protection L6924D
28/38 Doc ID 11908 Rev 9
8.4 Shutdown
The L6924D has a shutdown pin (SD) that allows enabling or disabling the device.
If the SD pin voltage is below 0.4 V (e.g. pin connected to GND), the device is enabled,
whereas if the SD pin voltage exceeds 2 V (e.g. the shutdown pin is left floating) the device
is disabled.
When the device enters the shutdown mode, the current consumption is reduced to 60 μA
typ. In this condition, V
REF
is turned off.
The Figure 24 clarifies the SD pin behavior.
Figure 23. 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 lower than 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
is expired ON ON