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參數(shù)資料
| 型號： | R3112D271A |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 電源管理 |
| 英文描述： | LOW VOLTAGE DETECTOR WITH OUTPUT DELAY |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| 封裝： | 1.60 X 1.20 MM, SON-6 |
| 文件頁數(shù)： | 11/30頁 |
| 文件大?。?/td> | 913K |
| 代理商： | R3112D271A |
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R3112x
Operation of Output Delay
11
GND
GND
Released Voltage (+V
DET
)
C
D
Pin Threshold Voltage (V
TCD
)
Output Delay Time(t
D
)
Output Voltage
Capacitor Voltage
Supply Voltage
When the supply voltage which is higher than released voltage is forced to V
DD
pin, charge to an external
capacitor starts, then capacitor voltage increases. Until the capacitor voltage reaches to C
D
Pin threshold voltage,
output voltage maintains “L”. When the capacitor voltage becomes higher than C
D
pin threshold voltage, output
voltage is reversed from "L” to "H". Where, the time interval between the rising edge of supply voltage and output
voltage reverse point means output delay time.
Output Delay Time
Output Delay Time (t
D
) can be calculated with the next formula.
t
D
=
0.69
×
R
D
×
C
D
(s)
R
D
is internal resistor and set at 6.5M
(Typ.) typically. C
D
(F) describes the capacitance value of an external
capacitor. Therefore,
t
D
=
0.69
×
6.5
×
10
6
×
C
D
(s)
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