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参数资料
| 型号： | L6924D013TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, QCC16 |
| 封装： | 3 X 3 MM, VFQFPN-16 |
| 文件页数： | 10/38页 |
| 文件大小： | 1454K |
| 代理商： | L6924D013TR |
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Applications information: charging process
L6924D
18/38
Doc ID 11908 Rev 9
Equation 8
Figure 12.
VPRE pin connection
Where RVPRE is the resistor between VPRE and GND, and RPRG is the resistor used to set
threshold.
A safety timer is also present. If the battery voltage doesn't rise over VPRETH, before this
time is expired, a fault is given (see Section 7.8: Maximum charging time). If at the beginning
of the charge process, the battery voltage is higher than the VPRETH, the Pre-Charge phase
is skipped.
7.4
Fast charge current
When the battery voltage reaches the Pre-charge voltage threshold (VPRETH), the L6924D
starts the Fast-charge Phase. In this phase, the device charges the battery with a constant
current, ICHG, programmable by an external resistor that sets the charge current with an
Equation 9
Figure 13.
IPRG pin connection
Where KPRG is a constant, equal to 9500.
During this phase, the battery voltage increases until it reaches the programmed output
voltage. A safety timer is also present. If this time expires, a fault is given (Section 7.8:
×
=
lt
PRETHDefau
PRETH
PRG
VPRE
V
R
VPRE
L6924D
R
PRE
VPRE
L6924D
R
PRE
×
=
CHG
PRG
BG
PRG
I
K
V
R
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| L6924U | 功能描述:电池管理 USB Battery Charger System w/integra RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| L6924U013TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:USB compatible battery charger system with integrated power switch for Li-Ion/Li-Polymer |
| L6924UTR | 功能描述:电池管理 Battery Charger USB Compatible RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| L6925 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR |
| L6925013TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR |
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