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参数资料
| 型号： | R3114K491C-TR-F |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, DSO4 |
| 封装： | 1 X 1 MM, LEAD FREE, DFN-4 |
| 文件页数： | 4/26页 |
| 文件大小： | 681K |
| 代理商： | R3114K491C-TR-F |
R3114x
12
OPERATION
Operation of (R3114xxx1A/C)
Block Diagram 1
1
2
3
4
5
I
x VDD
Operation Diagram
II
x VDD
Explanation of operation
Step 1. The output voltage is equal to the supply voltage (Nch Open Drain type is equal to the pull-up voltage).
Step 2. At Point “A”, Vref≤VDDx(R2+R3)/(R1+R2+R3) is true, as a result, the output of comparator is reversed
from "H" to "L", therefore the output voltage becomes the GND level. The voltage level of Point A means
a detector threshold voltage (-VDET).
Step 3. When the supply voltage is lower than the minimum operating voltage, the operation of the output
transistor becomes indefinite. The output voltage is equal to the pull-up voltage for Nch Open Drain type.
Step 4. The output Voltage is equal to the GND level.
Step 5. At Point “B”, Vref≤VDDxR2/(R1+R2) is true, as a result, the output of comparator is reversed from "L" to
"H", then the output voltage is equal to the pull-up voltage. The voltage level of Point B means a released
voltage (+VDET).
*) The difference between a released voltage and a detector threshold voltage is a detector threshold hysteresis.
Step
1
2
3
4
5
Comparator(-)
Pin
Input Voltage
I
II
I
Comparator
Output
L
H
Indefinite
H
L
HYS Tr.
OFF ON Indefinite ON OFF
Nch
OFF ON Indefinite ON OFF
Output
Tr.
Pch
ON OFF Indefinite OFF ON
In the case of CMOS output
type, the drain of Nch Tr.
and Pch Tr. are connected
to the OUT pin.
In the case of Nch Open
Drain output type, the drain
of Nch Tr. is connected to
the OUT pin. (OUT pin
should be pulled up to VDD
or an external voltage level.)
R2+R3
R1+R2+R3
R2
R1+R2
Supply Voltage VDD
GND
Detector Threshold
Hysteresis
A
B
Released Voltage +VDET
Detector Voltage -VDET
Min. Operating Voltage VDDL
GND
Output Delay
Time tPLH
Detector Delay
Time tPHL
Output Voltage VOUT
Vref
VDD
GND
OUT
-
+
Comparator
R1
R2
R3
HYS Tr.
Nch
Pch
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相关代理商/技术参数 |
参数描述 |
|---|---|
| R-311L-D | 制造商:SCHURTER 制造商全称:Schurter Inc. 功能描述:Power Cord with IEC Connector C13, Angled |
| R3-12 | 制造商:Thomas & Betts 功能描述:KUBE MULTITAP BODY SIZE0 4 POSITION |
| R313 | 制造商:EMERSON 功能描述:MOTOR 230/460 VOLT, 60 HERTZ, 3-PHASE, 138/69 AMP, 1190 RPM, FRAME:404T RIGID OPEN, REVERSE, 2-7/8 X 7-1/4KEY, SINGLE BALL BEARINGS FRAME : ALL OTHER HERTZ : 60 HERTZ HP OR WATTAGE : 60 HP PHASE : 3 PHASE ROTATION (ALL SE) : CCW RPM : 1101-1200 RPM VOLTAGE : MULTI VOLT |
| R3130 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| R3130A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
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