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CA1524E Scheda tecnica(PDF) 10 Page - Intersil Corporation

Il numero della parte CA1524E
Spiegazioni elettronici  Regulating Pulse Width Modulator
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Produttore elettronici  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

CA1524E Scheda tecnica(HTML) 10 Page - Intersil Corporation

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CA1524, CA2524, CA3524
FIGURE 14. FOLDBACK CURRENT-LIMITING CIRCUIT USED
TO
REDUCE
POWER
DISSIPATION
UNDER
SHORTED OUTPUT CONDITIONS
FIGURE 15. CAPACITOR-DIODE COUPLED VOLTAGE
MULTIPLIER OUTPUT STAGES
FIGURE 16. SINGLE-ENDED INDUCTOR CIRCUITS WHERE THE
TWO OUTPUTS OF THE 1524 ARE CONNECTED IN
PARALLEL
FIGURE 17. TRANSFORMER-COUPLED OUTPUTS
5
4
SA//SB
R1
R2
RS
SENSE
VO = 5V
IMAX =
I
RS
VTH +
VOR2
R1 + R2
()
ISC =
VTH
RS
WHERE
VTH = 200mV
+
-
V+
V+
V+
SA
SA
SA
SB
SB
SB
D1
D1
D1
V+ > VO
V+ < VO
| V+ | > | VO |
+VO
+VO
-VO
NOTE: Diode D1 Is Necessary To Prevent Reverse
Emitter-Base Breakdown of Transistor Switch SA.
V+
V+
V+
SA/SB
SA/SB
SA/SB
+VO
+VO
-VO
| V+ | < | VO |
V+ < VO
V+ > VO
TABLE 1. INPUT vs. OUTPUT VOLTAGE, AND FEEDBACK
RESISTOR VALUES FOR IL = 40mA (FOR CAPACI-
TOR-DIODE OUTPUT CIRCUIT IN FIGURE 18)
VO (V)
R2 (KΩ)
V+ (Min.) (V)
-0.5
6
8
-2.5
10
9
-3
11
10
-4
13
11
-5
15
12
-6
17
13
-7
19
14
-8
21
15
-9
23
16
-10
25
17
-11
27
18
-12
29
19
-13
31
20
-14
33
21
-15
35
22
-16
37
23
-17
39
24
-18
41
25
-19
43
26
-20
45
27
SA-B
V+
VO
V+
SA
SB
PUSH-PULL
FLYBACK
VO
VO
FULL BRIDGE
V+
+
-
VO
+
-
V+
SA
SB
Q1
Q2
CAN BE SA OR
SA CAN DRIVEQ1
CAN BE SB OR
SB CAN DRIVEQ2


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