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参数资料
| 型号： | RN5VD28C |
| 英文描述： | Voltage Detector |
| 中文描述： | 电压检测器 |
| 文件页数： | 9/28页 |
| 文件大小： | 198K |
| 代理商： | RN5VD28C |
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RN5VD
16
A
B
1
2
3
4
5
Detector Threshold Hysteresis
Released Voltage +VDET
Detected Voltage –VDET
Minimum Operaing Voltage
Delay Time
GND
Supply Voltage
(VDD)
Output Voltage
(OUT)
OPERATION
FIG. 2 Operation Diagram
FIG. 1 Block Diagram
Step 1. Output Voltage is equal to Pull-up Voltage.
Step 2. When Input Voltage (VDD) reaches the state of Vref
≥VDD (Rb+Rc) /(Ra+Rb+Rc) at Point A (Detected Voltage –VDET) , the output of Comparator is
reversed, so that Output Voltage becomes GND. Discharging is performed from CD pin connected to External Capacitor. No delay time is generated.
Step 3.
Output Voltage becomes indefinite when Power Source Voltage(VDD) is smaller than Minimum Operating Voltage. When the output is pulled up, VDD is
output.
Step 4. Output Voltage becomes equal to GND.
Step 5. When Input Voltage (VDD) reaches the state of Vref
≤VDD Rb/(Ra+Rb) at Point B (Released Voltage +VDET) , the output of Comparator is reversed,
and the External Capacitor is charged through CD pin, so that Output Voltage becomes equal to Pulled-up Voltage after a delay time
tD (=0.69
×106×CD) .
Step
Step 1
Step 2
Step 3
Step 4
Step 5
Comparator (–) Pin
Input Voltage
I
II
I
Comparator Output
LH
Indefinite
HL
Tr. 1, 2
OFF
ON
Indefinite
ON
OFF
Output Tr.
Nch
OFF
ON
Indefinite
ON
OFF
Pch
ON
OFF
Indefinite
OFF
ON
I.
Rb + Rc
Ra + Rb + Rc
VDD
II.
Rb
Ra + Rb
VDD
GND
OUT
CD
VDD
Ra
Current Source
Output Capacitor
RD
Rb
Rc
Tr.1
Tr.2
Vref
–
+
Comparator
Schmitt Trigger
Nch
Pch
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| RN5VD29A | Voltage Detector |
| RN5VD29C | Voltage Detector |
| RN5VD58C | Voltage Detector |
| RN5VD59A | Voltage Detector |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RN5VD28CA | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:VOLTAGE DETECTOR WITH OUTPUT DELAY |
| RN5VD28CA-TL | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:VOLTAGE DETECTOR WITH OUTPUT DELAY |
| RN5VD28CA-TR | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:VOLTAGE DETECTOR WITH OUTPUT DELAY |
| RN5VD28CC | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:VOLTAGE DETECTOR WITH OUTPUT DELAY |
| RN5VD28CC-TL | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:VOLTAGE DETECTOR WITH OUTPUT DELAY |
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