L6924U STMicroelectronics, L6924U Datasheet - Page 21
![no-image](/images/manufacturer_photos/0/6/637/stmicroelectronics_sml.jpg)
L6924U
Manufacturer Part Number
L6924U
Description
Battery Management USB Battery Charger System w/integra
Manufacturer
STMicroelectronics
Datasheet
1.L6924U.pdf
(37 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
L6924U013TR
Manufacturer:
MICROCHIP
Quantity:
12 500
Company:
Part Number:
L6924UTR
Manufacturer:
ST
Quantity:
2 001
L6924U
7.5
7.6
7.7
Note:
Recharge flow chart
Figure 14. Recharge flow chart
Recharge threshold
When, from an end-of-charge condition, the battery voltage goes below the recharging
threshold (V
threshold is 4.05 V.
Maximum charging time
To avoid the charging of a dead battery for a long time, the L6924U has the possibility to set
a maximum charging time starting from the beginning of the fast-charge phase. This timer
can be set through a capacitor, connected between the T
external capacitor (in nF) and is given by the following equation:
Equation 10
The maximum recommended C
RCH
), the device goes back in charging state. The value of the recharge
Doc ID 14716 Rev 2
C
TPRG
TPRG
=
value must be less than 50 nF.
⎛
⎜
⎜
⎜
⎜
⎝
T
MAXCH
K
T
Applications information: charging process
V
REF
×
R
V
PRG
BG
⎞
⎟
⎟
⎟
⎟
⎠
×
PRG
10
9
pin and GND. C
E
TPRG
is the
21/37