Datasheet

L6924D Applications information: charging process
Doc ID 11908 Rev 9 21/38
Figure 16. T
PRG
pin connection
Where,
V
REF
= 1.8V,
K
T
= 279 x 10
5
,
V
BG
= 1.23V, and
T
MAXCH
is the charging time given in seconds.
If the battery does not reach the end-of-charge condition before the timer expires, a fault is
issued.
Also during the pre-charge phase there is a safety timer, given by:
Equation 12
If this timer expires and the battery voltage is still lower than V
PRETH
, a fault signal is
generated, and the charge process is terminated.
T
PRG
L6924D
C
TPRG
MAXCHMAXPRECH
TT ×=
8
1