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參數(shù)資料
| 型號(hào)： | MB3893A |
| 廠商： | Fujitsu Limited |
| 英文描述： | Power Management IC for Mobile Phone |
| 中文描述： | 電源管理IC的移動(dòng)電話 |
| 文件頁數(shù)： | 39/44頁 |
| 文件大小： | 496K |
| 代理商： | MB3893A |
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MB3893A
39
LEDG Operation Table
LED
LEDG
=
L : ON, H : OFF
LED, LEDG: Power supply is OUT1, therefore undefined when OUT1 = OFF.
I
ABOUT CAPACITOR CONNECTED TO VCC PIN
When the VCC voltage exceeds 2.75 V (Typ.), the VCONT terminal (pin 16) goes to “H” level, and the OUT1
(pin 29), OUT2 (pin 30), and OUT4 (pin 22) terminals rise. When each of these respective OUT terminals rises,
a rush current flows to the capacitor connected to that OUT terminal. At this time the internal impedance of the
battery causes VCC to drop, and if VCC voltage goes below 2.5 V (Typ.), the OUT terminal voltage regurns to
“L” level (regulator OFF mode).t is necessary to set the capacitor connected between VCC and GND taking into
consideration the internal impedance of the battery, so that the VCC drop does not go below 2.5 V.
LEDG
L
H
H
L
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