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參數(shù)資料
| 型號： | L6924U013TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PQCC16 |
| 封裝： | 3 X 3 MM, ROHS COMPLIANT, VFQFPN-16 |
| 文件頁數(shù)： | 25/37頁 |
| 文件大?。?/td> | 789K |
| 代理商： | L6924U013TR |
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L6924U
Additional applications information
Doc ID 14716 Rev 2
31/37
Figure 25.
Demonstration board schematic
Table 7.
Demonstration board components description
Name
Value
Description
R1
24 k
Ω AC mode fast-charge current resistor. Used to set the charging current in AC mode.
R2
24 k
Ω
USB mode fast-charge current resistor. Used to set the charging current in USB
mode.
R3
3.3 k
Ω
End of Charge current resistor. Used to set the termination current and, as a “gas
gauge” when measuring the voltage across on it.
R4
1 k
Ω
Pull up resistor. Connected between VREF and TH pin.
R5
1 k
Ω
Pull up resistor. To be used when the ST1 is connected to a LED
R6
1 k
Ω
Pull up resistor. To be used when the ST2 is connected to a LED.
RT1
470
Ω
If a NTC is not used, a half value of R4 must be mounted to keep the TH voltage in
the correct window.
C1
1 F
Input capacitor.
C2
4.7 F
Output capacitor.
C3
10 nF
TMAX capacitor. Used to set the maximum charging time.
C4
1 nF
VREF filter capacitor.
D1
GREEN ST1 LED.
D2
RED
ST2 LED.
J1
ST2 jumper. Using to select the LED or the external microcontroller.
J2
ST1 jumper. Using to select the LED or the external microcontroller.
J3
SD jumper. If open, the device is in shutdown mode; when closed, the device starts
to work.
J4
Low power/ high power USB mode selection jumper.
J5
AC/USB mode selection jumper.
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