Datasheet

Pin description L6924U
6/37 Doc ID 14716 Rev 2
Pin I/O Name Pin description
9 I ISEL
Switches between high power USB (I
USB
up to 500 mA) and low
power USB (I
USB/5
) in USB mode. A low level sets the L6924U in
low power mode and a high level sets the L6924U in high power
mode. When the AC mode is selected, the ISEL pin must be
connected to ground or left floating.
10 I V
OSNS
Output voltage sense pin.
It senses the battery voltage to control the voltage regulation loop.
11 O V
OUT
Output pin. (connected to the battery)
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 sets the charge
termination current threshold I
ENDTH
: if I
CHG
< I
ENDTH
, the charge
process ends. The voltage across the resistor is proportional to the
current delivered to the battery (gas gauge function).
14 I MODE
Selects pin AC adapter or USB port input modes. A high level sets
the L6924U in USB mode while a low level sets the L6924U in the
AC adapter mode. When the AC adapter input is selected, the ISEL
pin status does not affect the current set.
15 I I
USB
Charge current program pin in USB mode: a resistor connected
from this pin to ground sets the fast charge current value (I
USB
up to
500 mA) with an accuracy of 7 %. The USB high power/low power
mode is selected with the ISEL pin.
16 I I
AC
Charge current program pin in AC mode: a resistor connected from
this pin to GND sets the fast charge current value (I
AC
up to 1 A)
with an accuracy of 7 %.
Table 2. Pin functions (continued)