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UC1524 Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte UC1524
Spiegazioni elettronici  Advanced Regulating Pulse Width Modulators
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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UC1524 Scheda tecnica(HTML) 1 Page - Texas Instruments

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UC1524
UC2524
UC3524
15
7
6
16
V
IN
REFERENCE
REGULATOR
V
REF
+5V TO ALL
INTERNAL
CIRCUITRY
R
T
C
T
OSC
(RAMP)
3
OSC OUT
Q
Q
R
+5V
12
11
C
A
E
A
13
14
C
B
E
B
9
+5V
5
4
–SENSE
+SENSE
CL
COMPENSATION
10k
1k
10
8
GROUND
(SUBSTRATE)
+5V
EA
1
2
INV INPUT
NI INPUT
COMPARATOR
SHUTDOWN
BLOCK DIAGRAM
DESCRIPTION
The UC1524, UC2524 and UC3524 incorporate on a single monolithic chip
all the functions required for the construction of regulating power supplies, in-
verters or switching regulators. They can also be used as the control element
for high-power-output applications. The UC1524 family was designed for
switching regulators of either polarity, transformer-coupled dc-to-dc convert-
ers, transformerless voltage doublers and polarity converter applications em-
ploying fixed-frequency, pulse-width modulation techniques. The dual
alternating outputs allow either single-ended or push-pull applications. Each
device includes an on-chip reference, error amplifier, programmable oscilla-
tor, pulse-steering flip-flop, two uncommitted output transistors, a high-gain
comparator, and current-limiting and shut-down circuitry. The UC1524 is
characterized for operation over the full military temperature range of -55°C
to +125°C. The UC2524 and UC3524 are designed for operation from -25°C
to +85°C and 0° to +70°C, respectively.
Advanced Regulating Pulse Width Modulators
FEATURES
• Complete PWM Power Control
Circuitry
• Uncommitted Outputs for
Single-ended or Push-pull
Applications
• Low Standby Current…8mA Typical
• Interchangeable with SG1524,
SG2524 and SG3524, Respectively
SLUS180D - NOVEMBER 1999 - REVISED AUGUST 2002


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