Datasheet

Pins description and connection diagrams L6924D
6/38 Doc ID 11908 Rev 9
12 O V
REF
External reference voltage pin.(reference voltage is 1.8 V±2%)
13 I/O I
END
Charge termination pin.
A resistor connected from this pin to GND fixes the charge termination current threshold
I
ENDTH
: if I < I
ENDTH
, the charger behaves according to the V
PRE
status (see Chapter 7.5:
End-of-charge current on page 19). The voltage across the resistor is proportional to the
current delivered to the battery (Gas Gauge function).
14 I V
PRE
Multifunction pin.
A resistor connected to GND allows the user to adjust the pre-charge voltage threshold
V
PRETH
.
If the pin is floating, V
PRETH
= 2.8 V. If the voltage on V
PRE
pin is lower than 0.8 V, V
PRETH
=
2.8 V and the charge is not automatically terminated when I < I
ENDTH
.
If the voltage on V
PRE
goes lower than 0.5 V (edge sensitive), the maximum charging time is
reset.
15 I I
PRG
Charge current program pin.
A resistor connected from this pin to GND, fixes the fast charge current value (I
CHG
), with an
accuracy of 7%.
16 I I
PRE
Pre-charge current program pin.
If the pin is floating I
PRETH
is equal to 10% of I
CHG
. If I
PRETH
has to be programmed at a
different value, the pin has to be connected to GND or V
REF
,
through a resistor see
Chapter 7.2: Pre-charge current on page 17.
Table 2. Pin functions