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Part Name
Description
CA3274E View Datasheet(PDF) - Intersil
Part Name
Description
Manufacturer
CA3274E
Current Limiting Power Switch with Current Limiter Sense Flag
Intersil
CA3274E Datasheet PDF : 5 Pages
1
2
3
4
5
t
RISE
t
ON
DELAY
CA3274
t
FALL
t
OFF
DELAY
CURRENT
LIMITING
SYSTEM
NOISE
3.35mV
SENSE
LEVEL
ON TIME
t
SENSE
(NOISE HOLD-OFF
DELAY)
t
D
(SEE NOTE)
NOTE: For V
CC
= 7V to 10V; t
D
(MAX) = 600
µ
S, if Control In = High,
Sense In = High; Pin 1, Flag Out can go low only if t
SENSE
≥
t
D
t
FLAG
DELAY
FIGURE 2. CA3274 TIMING DIAGRAM
CONTROL IN - PIN 7
DRIVE OUT- PIN 5
OUTPUT
LOAD CURRENT
SENSE IN - PIN 2
FLAG OUT- PIN 1
7
IN V
CONTROL
+V
CC2
(ADJ. FOR 3mA
IN FLAG-OUT
10K
V
SAT
TEST
FLAG
1
OUT
Q1
4
SIGNAL
GROUND
POWER SUPPLY
+V
CC
I
CC
8
CONTROL
LOGIC
Q2
OUTPUT LOAD
POWER SUPPLY
+V
CC1
IN
6
IN
51
Ω
(ADJ. FOR 200mA
IN V
SAT
TEST)
DRIVER
5
OUT
S1
3
1
(PSSROUT)
2.1V
LATCH
-
2
1
SENSE
S1
2.1V
120
+
IN
3
120
Ω
335mV
3
POWER
GROUND
FIGURE 3. CA3274 TEST CIRCUIT
V
SENSE
10-43
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