L6924U STMicroelectronics, L6924U Datasheet - Page 6

• Manufacturer Part Number: L6924U
• Description: Battery Management USB Battery Charger System w/integra
• Manufacturer: STMicroelectronics

Specifications of L6924U

• Product: Charge Management
• Battery Type: Li-Ion
• Output Voltage: 4.2 V
• Output Current: 30 mA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Package / Case: VFQFPN
• Mounting Style: SMD/SMT
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pin description
6/37
Table 2.
Pin
10
11
12
13
14
15
16
9
Pin functions (continued)
I/O
I/O
O
O
I
I
I
I
I
V
MODE
Name
V
V
ISEL
I
I
OSNS
END
USB
I
OUT
REF
AC
Doc ID 14716 Rev 2
Switches between high power USB (I
power USB (I
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.
Output voltage sense pin.
It senses the battery voltage to control the voltage regulation loop.
Output pin. (connected to the battery)
External reference voltage pin. (reference voltage is 1.8 V ± 2 %)
Charge termination pin.
A resistor connected from this pin to GND sets the charge
termination current threshold I
process ends. The voltage across the resistor is proportional to the
current delivered to the battery (gas gauge function).
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.
Charge current program pin in USB mode: a resistor connected
from this pin to ground sets the fast charge current value (I
500 mA) with an accuracy of 7 %. The USB high power/low power
mode is selected with the ISEL pin.
Charge current program pin in AC mode: a resistor connected from
this pin to GND sets the fast charge current value (I
with an accuracy of 7 %.
USB/5
) in USB mode. A low level sets the L6924U in
Pin description
ENDTH
: if I
USB
CHG
up to 500 mA) and low
< I
ENDTH
AC
, the charge
up to 1 A)
USB
L6924U
up to