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UC1903 датащи(PDF) 5 Page - Texas Instruments

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номер детали UC1903
подробное описание детали  Quad Supply and Line Monitor
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
Logo TI1 - Texas Instruments

UC1903 датащи(HTML) 5 Page - Texas Instruments

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UC1903
+VIN
REFERENCE
CIRCUIT
1.25V
Q2
Q1
Q3
R1
R2
R3
15 W
2.5kW
2.5kW
2.5V
OUTPUT
RA
RS
VADJ
BIAS
CANCELLATION
ANDMIRROR
CIRCUITS
I
=
O
V
ADJ
R4
R4
8kW
R5
R6
R7
R8
1.84kW
0.16kW
0.16kW
1.84kW
IOC
IOD
Q5
Q4
IOB
IOA
TO
OVHYSTERESIS
CONTROL
OVTHRESHOLD
FAULTWINDOW
THREAHOLDandHYSTERESIS
CIRCUITS
UVTHRESHOLD
TO
UVHYSTERESIS
CONTROL
Typical Characteristics
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-55
-35 -15
5
25
45
65
85
105
125
T -JunctionTemperature-°C
J
Typical2.5VReference
vs
TemperatureCharacteristic
40
-55
-35 -15
5
25
45
65
85
105
125
T -JunctionTemperature-°C
J
TypicalFaultDelay
vs
TemperatureCharacteristic(C
270pF)
DELAY
35
30
25
20
UC1903
UC2903
UC3903
www.ti.com ........................................................................................................................................ SLUS233A – OCTOBER 1999 – REVISED SEPTEMBER 2008
Block Diagram
A.
The UC1903 fault window circuitry generates OV and UV thresholds centered around the 2.5-V reference. Window
magnitude and threshold hysteresis are proportional to the window adjust input voltage at Pin 4.
Figure 1. Operation and Application Information
Copyright © 1999–2008, Texas Instruments Incorporated
Submit Documentation Feedback
5
Product Folder Link(s): UC1903 UC2903 UC3903


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