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參數(shù)資料
| 型號： | RN5VS25CC |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | LOW VOLTAGE DETECTOR |
| 中文描述： | 低電壓檢測 |
| 文件頁數(shù)： | 10/30頁 |
| 文件大?。?/td> | 202K |
| 代理商： | RN5VS25CC |
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RN5VS
OPERATION
FIG. 1 Block Diagram
Operation Diagram
Step 1. Output Voltage is equal to Power Source Voltage (VDD).
Step 2. When Input Voltage to Comparator reaches the state of Vref
≥VDD(Rb+Rc)/(Ra+Rb+Rc)at Point A (Detected Voltage –VDET), the output of Com-
parator is reserved, so that Output Voltage becomes GND.
Step 3. In the case of CMOS Output, Output Voltage becomes unstable when Supply Voltage (VDD) is smaller than Minimum Operating Voltage. In the
case of Nch Open Drain Output, a pulled-up voltage is output.
Step 4. Output Voltage becomes equal to GND.
Step 5. When Input Voltage to Comparator reaches the state of Vref
≤VDD (Rb)/(Ra+ Rb) at Point B (Released Voltage +VDET), the output of Comparator is
reversed, so that Output Voltage becomes equal to Supply Voltage (VDD).
FIG. 2 Operation Diagram
Step
Step 1
Step 2
Step 3
Step 4
Step 5
Comparator(+) Pin
Input Voltage
III
II
I
Comparator Output
HL
Indefinite
LH
Tr. 1
OFF
ON
Indefinite
ON
OFF
Output Tr.
Pch
ON
OFF
Indefinite
OFF
ON
Nch
OFF
ON
Indefinite
ON
OFF
I
.
Rb + Rc
Ra + Rb + Rc
VDD
II.
Rb
Ra + Rb
VDD
GND
OUT
VDD
Ra
Rb
Rc
Tr.1
Vref
Pch
Nch
–
+
A
B
Detector Threshold Hysteresis
tPLH
1
2
3
45
In RN5VS
××A, Nch Tr. drain is
connected to OUT pin.
In RN5VS
××C, Nch Tr. drain
and Pch Tr. drain are connected
to OUT pin.
Released Volage +VDET
Supply Volage
Detected Volage –VDET
(VDD)
Minimum Operating Volage
GND
Output Volage
(OUT)
GND
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