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Intersil Corporation - Regulating Pulse Width Modulator

Numéro de référence CA3524F
Description Regulating Pulse Width Modulator
Fabricant Intersil Corporation 
Logo Intersil Corporation 





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CA3524F fiche technique
October 2000
CA2524 IPSRAONDOUCBTSOLETE
CA1524, CA2524
CA3524
Regulating Pulse Width Modulator
Features
Description
• Complete PWM Power Control Circuitry
• Separate Outputs for Single-Ended or Push-Pull
Operation
• Line and Load Regulation . . . . . . . . . . . . . . . 0.2% (Typ)
• Internal Reference Supply with 1% (Max) Oscillator
and Reference Voltage Variation Over Full
Temperature Range
• Standby Current of Less Than 10mA
• Frequency of Operation Beyond 100kHz
• Variable-Output Dead Time of 0.5µs to 5µs
• Low VCE(sat) Over the Temperature Range
Applications
• Positive and Negative Regulated Supplies
• Dual-Output Regulators
• Flyback Converters
• DC-DC Transformer-Coupled Regulating Converters
• Single-Ended DC-DC Converters
• Variable Power Supplies
The CA1524 and CA3524 are silicon monolithic integrated
circuits designed to provide all the control circuitry for use in
a broad range of switching regulator circuits.
The CA1524 and CA3524 have all the features of the indus-
try types SG1524, SG2524, and SG3524, respectively. A
block diagram of the CA1524 series is shown in Figure 1.
The circuit includes a zener voltage reference, transconduc-
tance error amplifier, precision R-C oscillator, pulse-width
modulator, pulse-steering flip-flop, dual alternating output
switches, and current-limiting and shutdown circuitry. This
device can be used for switching regulators of either polarity,
transformer-coupled dc-dc converter, transformerless volt-
age doublers, dc-ac power inverters, highly efficient variable
power supplies, and polarity converter, as well as other
power-control applications.
Ordering Information
PART
NUMBER
CA1524E
CA1524F
CA2524E
CA2524F
CA3524E
CA3524F
TEMPERATURE
RANGE
PACKAGE
-55oC to +125oC 16 Lead Plastic DIP
-55oC to +125oC 16 Lead CerDIP
0oC to +70oC 16 Lead Plastic DIP
0oC to +70oC 16 Lead CerDIP
0oC to +70oC 16 Lead Plastic DIP
0oC to +70oC 16 Lead CerDIP
Pinout
CA1524, CA3524
(PDIP, CERDIP)
TOP VIEW
INV. INPUT
NON-
INV. INPUT
OSC OUT
(+) C.L.
SENSE
(-) C.L.
SENSE
RT
1
2
3
4
5
6
CT 7
GND 8
16 VREF
15 V+
14 EMITTER B
13 COLLECTOR B
12 COLLECTOR A
11 EMITTER A
10 SHUTDOWN
9 COMPENSATION
AND COMPARATOR
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 2000
1
File Number 1239.4

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