L6924U STMicroelectronics, L6924U Datasheet - Page 31
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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
Figure 25. Demonstration board schematic
Table 7.
Name
RT1
R1
R2
R3
R4
R5
R6
C1
C2
C3
C4
D1
D2
J1
J2
J3
J4
J5
GREEN ST1 LED.
3.3 kΩ
4.7 µF Output capacitor.
24 kΩ
24 kΩ
470 Ω
Value
10 nF
1 kΩ
1 kΩ
1 kΩ
RED
1 µF
1 nF
Demonstration board components description
AC mode fast-charge current resistor. Used to set the charging current in AC mode.
USB mode fast-charge current resistor. Used to set the charging current in USB
mode.
End of Charge current resistor. Used to set the termination current and, as a “gas
gauge” when measuring the voltage across on it.
Pull up resistor. Connected between VREF and TH pin.
Pull up resistor. To be used when the ST1 is connected to a LED
Pull up resistor. To be used when the ST2 is connected to a LED.
If a NTC is not used, a half value of R4 must be mounted to keep the TH voltage in
the correct window.
Input capacitor.
T
V
ST2 LED.
ST2 jumper. Using to select the LED or the external microcontroller.
ST1 jumper. Using to select the LED or the external microcontroller.
SD jumper. If open, the device is in shutdown mode; when closed, the device starts
to work.
Low power/ high power USB mode selection jumper.
AC/USB mode selection jumper.
MAX
REF
capacitor. Used to set the maximum charging time.
filter capacitor.
Doc ID 14716 Rev 2
Description
Additional applications information
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