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IP1543 Datasheet(PDF) 5 Page - Seme LAB

Part # IP1543
Description  POWER SUPPLY SUPERVISORY CIRCUIT
PDF  7 Pages
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Manufacturer  SEME-LAB [Seme LAB]
Direct Link  http://www.semelab.co.uk
Logo SEME-LAB - Seme LAB

IP1543 Datasheet(HTML) 5 Page - Seme LAB

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LAB
SEME
IP1543 SERIES
Semelab plc. Telephone (01455) 556565. Telex: 341927. Fax (01455) 552612.
Prelim. 1/96
SCR
TRIGGER
GROUND
2.5V
REF.
14
MAIN POSITIVE
SUPPLY
16
15
U.V.
O.V.
7
6
9
4
2
3
1
339 QUAD COMP.
ADDITIONAL
POSITIVE
SUPPLY
NEGATIVE
SUPPLY
VOLTAGE
TO SHUTDOWN
CIRCUIT
R1
R2
R4
R5
R
6
MASTER POWER SUPPLY
CONDITION INDICATOR
IP1543
BIAS SUPPLY
TO 339 COMPARATORS
R
3
R7
APPLICATIONS INFORMATION
16
POWER SUPPLY
2.5V
REF.
14
15
R
SC
C.L.
10
11
12
13
TO VOLTAGE
CONTROL LOOP
7
6
5
8
9
4
OUT OF TOLERANCE
INDICATORS
R
1
C
S
R
3
R6
R
2
R
4
R5
U.V.
O.V.
C
D1
C
D2
SCR
TRIGGER
2
LATCH
3
RESET
1
RG
TO SYSTEM
CONTROL
SCR
“CROWBAR”
Typical Application
Sensing Multiple Supply Voltages
Current Limit VTH ≈
1000
R1
CS is determined by the current loop dynamics.
Peak Current to load IP ≅
+
VTH
RSC
2.5 (R4 + R5 + R6)
R5 + R6
VO
RSC
R2
R2 + R3
Low Output Voltage Limit VO(low) =
High Output Voltage Limit VO(high) =
Voltage Sensing Delay TD = 10000 CD
SCR trigger power limiting resistor RG >
2.5 (R4 + R5 + R6)
R6
VIN -5
0.2



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