參數(shù)資料
型號： R3112Q271A
廠商： RICOH COMPANY LTD
元件分類： 電源管理
英文描述： Multiconductor Cable; Number of Conductors:40; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:No; Conductor Material:Copper; Jacket Color:Chrome RoHS Compliant: Yes
中文描述： 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO4
封裝： SC-82AB, 4-PIN
文件頁數(shù)： 2/16頁
文件大小： 267K
代理商： R3112Q271A
Rev. 1.10 - 2 -
I
OPERATION
OUT
Vref
V
DD
GND
C
D
+
-
Pch
Nch
Schmitt Trigger
Comparator
Ra
Rb
Rc
Tr.1
Tr.2
R
D
Output Capacitor
Current Source
Fig. 1 Block Diagram with an external capacitor
Output Voltage
(OUT)
Supply Voltage
Minimum Operating
Voltage
HYSTERESIS RANGE
A
B
Released Voltage
+
VDET
Detector Threshold
-V
DET
VDDL
GND
GND
Delay Time
1
2
3
4
5
Operation Status
1
2
3
4
5
Comparator(-) Pin
Input Voltage
Ι
ΙΙ
ΙΙ
ΙΙ
Ι
Comparator Output
L
H
Indefinite
H
L
Tr.1, 2
OFF
ON
Indefinite
ON
OFF
Nch
OFF
ON
Indefinite
ON
OFF
Output Tr.
Pch
ON
OFF
Indefinite
OFF
ON
Ι
Rb+Rc
×
V
DD
Ra+Rb+Rc
ΙΙ
×
V
DD
Ra+Rb
Fig. 2 Operation Diagram
1. Output Voltage is equal to Supply Voltage. (As for Nch Open Drain Type, equal to pull-up voltage.)
2. When the Supply Voltage is down to the detector threshold voltage level(Point A),
Vref
≥
V
DD
×
(
Rb+Rc)/(Ra+Rb+Rc) is true, then output of the comparator is reversed from “L” to “H”, therefore
Output Voltage becomes GND level.
3. When the Supply Voltage is lower than Minimum Operating Voltage, the operation of Output Transistor is
indefinite. In the case of Nch Open Drain Type, Output Voltage is equal to pull-up Voltage.
4. Output Voltage becomes GND level.
5. When the Supply Voltage is higher than released voltage (Point B), Vref
≤
V
DD
×
Rb/(Ra+Rb) is true, then
Output of the comparator reaches the threshold level, and Output of Shmitt Trigger is reversed from “H” to
“L”, then Output Voltage is equal to Supply Voltage. (As for Nch Open Drain Type, equal to pull-up voltage.)
*) The difference between Released Voltage and Detector Threshold Voltage means Hysteresis Range
Voltage.
Rb
相關(guān)PDF資料
PDF描述
R3112Q271A-TR Multiconductor Cable; Number of Conductors:40; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Voltage Nom.:300V RoHS Compliant: Yes
R3112Q271C Multiconductor Cable; Number of Conductors:50; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Conductor Material:Copper; Conductor Plating:Tin RoHS Compliant: Yes
R3112Q271C-TR Multiconductor Cable; Number of Conductors:50; Conductor Size AWG:22; No. Strands x Strand Size:7 x 30; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Conductor Material:Copper; Voltage Nom.:300V RoHS Compliant: Yes
R3112Q451A Multiconductor Cable; Number of Conductors:7; Conductor Size AWG:20; No. Strands x Strand Size:7 x 28; Jacket Material:Polyvinylchloride (PVC); Leaded Process Compatible:Yes; Conductor Material:Copper; Voltage Nom.:300V RoHS Compliant: Yes
R3112Q451A-TR LOW VOLTAGE DETECTOR WITH OUTPUT DELAY
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