參數(shù)資料
型號: L6924D013TR
廠商: STMICROELECTRONICS
元件分類: 電源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC16
封裝: 3 X 3 MM, VFQFPN-16
文件頁數(shù): 27/38頁
文件大?。?/td> 1454K
代理商: L6924D013TR
L6924D
Additional applications information
Doc ID 11908 Rev 9
33/38
Table 7.
Demonstration board components description
Name
Value
Description
R1
1k
Pull up resistor. To be used when the ST1 is connected to a LED.
R2
1k
Pull up resistor. To be used when the ST1 is connected to a LED.
R3
1k
Pull up resistor. Connected between VREF and TH pin.
R4
3k3
End of charge current resistor. Used to set the termination current and, as a “Gas
Gauge” when measuring the voltage across on it.
R5
24k
Fast-charge current resistor. Used to set the charging current.
R6
N.M.
VPRETH resistor. Used to set programmable pre-charge voltage threshold. If not
mounted, the VPRETHDefault, equal to 2.8V, is set.
R7
N.M.
IPRETH resistor. Used to set the programmable pre-charge current threshold below
the default one. If not mounted, the IPRETHDefault is set.
R8
68k
IPRETH resistor. Used to set the programmable pre-charge current threshold above
the default one. If not mounted, the IPRETHDefault is set.
R9
470R
If a NTC is not used, a half value of R3 must be mounted to keep the TH voltage in
the correct window.
R10
N.M.
It has the same function of R6. Moreover, if it is replaced with a short-circuit, when
J5 is closed, the timer is reset (falling edge).
C1
1F
Input capacitor.
C2
10nF
TMAX capacitor. Used to set the maximum charging time.
C3
4.7F
Output capacitor.
C4
1nF
VREF filter capacitor.
LD1
GREEN ST1 LED.
LD2
RED
ST2 LED.
J1
ST1 jumper. Using to select the LED or the external C.
J2
ST2 jumper. Using to select the LED or the external C.
J3
SD jumper. If open, the device is in shutdown mode; when closed, the device starts
to work.
J4
VOPRG jumper. If closed, the 4.2V output voltage is set; if open, the 4.1V is set.
J5
VPRE jumper. If closed with R10 in short-circuit with GND, resets the timer.
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