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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： | 5/38页 |
| 文件大小： | 1454K |
| 代理商： | L6924D013TR |
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L6924D
Operation description
Doc ID 11908 Rev 9
13/38
charging process is usually terminated when the charging current reaches a set value or
when a charging timer expires (Chapter 7.9 on page 22).
Figure 6 shows the different phases.
Figure 6.
Typical charge curves in linear mode
The worst case in power dissipation occurs when the device starts the fast-charge phase. In
fact, the battery voltage is at its minimum value. In this case, this is the maximum difference
between the adapter voltage and battery voltage, and the charge current is at its maximum
value.
The power dissipated is given by the following equation:
Equation 1
The higher the adapter voltage is, the higher the power dissipated. The maximum power
dissipated depends on the thermal impedance of the device mounted on board.
End
Charge
Voltage-Regulation
Phase
Power dissipation
Pre-Charge
Phase
Fast-Charge
Phase
I
PRETH
I
CHG
V
OPRGTH
Battery Voltage
Charge Current
Adapter Voltage
V
ADP
V
PRETH
CHG
BAT
ADP
DIS
I
V
P
×
=
)
(
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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 |
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