参数资料
型号: L6924U
厂商: STMICROELECTRONICS
元件分类: 电源管理
英文描述: POWER SUPPLY SUPPORT CKT, QCC16
封装: 3 X 3 MM, ROHS COMPLIANT, VFQFP-16
文件页数: 7/38页
文件大小: 598K
代理商: L6924U
L6924U
Operation description
15/38
Where
V
MOS is given by:
Equation 3
Where,
ILIM = current limit of the wall adapter, and RDS(on) = resistance of the power MOSFET.
The difference between the programmed charge current and the adapter limit should be
high enough to minimize the RDS(on) value (and the power dissipation). This makes the
control loop completely unbalanced and the power element is fully turned on.
Figure 8 shows the RDS(on) values for different output voltage and charging currents for an
adapter current limit of 500 mA.
Figure 8.
RDS(on) curves vs charging current and output voltage
I
R
V
LIM
ON
DS
MOS
×
=
)
(
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