CA1523E Intersil Corporation, CA1523E Datasheet

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CA1523E

Manufacturer Part Number
CA1523E
Description
Voltage Regulator Control Circuit for Variable Switching Regulator
Manufacturer
Intersil Corporation
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
CA1523E
Manufacturer:
SONY
Quantity:
6 230
April 1994
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
407-727-9207
Features
• Operates up to 200kHz
• Pins ESD Protected
• Remote ON/OFF
• Slow Start with Reset
• Overcurrent Sensing
• Lower Peak Currents than PWM Regulator
Ordering Information
Pinout
CA1523E
- Less Prone to Magnetic Saturation
NUMBER
PART
|
Copyright
©
TEMPERATURE
0
Intersil Corporation 1999
o
C to +70
RANGE
o
C
CURRENT SENSE
14 Lead Plastic DIP
OUTPUT GND
RISE TIME
PACKAGE
OUTPUT
ERROR
GND
V
CC
1
2
3
4
5
6
7
CA1523 (PDIP)
TOP VIEW
7-11
Description
The CA1523 monolithic silicon integrated circuit is a variable
interval pulse regulator designed to provide the control cir-
cuitry for use in switching regulator circuits. It operates from
11V to 15V.
The regulator provides a single output drive capable of
300mA source/200mA sink. The maximum operating fre-
quency is better than 200kHz. An attractive feature of the
CA1523 is that the timing capacitor charge and discharge
current is set up externally via a single resistor. The ratio of
charge to discharge current is internally set at a maximum of
2 to 1 allowing simultaneous change in output pulse width
with increased frequency at higher load. The pulse width
variation at higher frequencies effectively compensates for
the losses in magnetics and thereby increases the power
supply efficiency at higher load end by as much as 20
percent.
14
13
12
10
11
9
8
Voltage Regulator Control Circuit
for Variable Switching Regulator
TIMING
ZENER
ON/OFF
OVER CURRENT
SLOW START
LOGIC OUTPUT
NC
CA1523
File Number
1785.2

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CA1523E Summary of contents

Page 1

... Overcurrent Sensing • Lower Peak Currents than PWM Regulator - Less Prone to Magnetic Saturation Ordering Information PART TEMPERATURE NUMBER RANGE o o CA1523E +70 C Pinout CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. © | 407-727-9207 Copyright Intersil Corporation 1999 ...

Page 2

Absolute Maximum Ratings DC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

Other Desirable Features Other desirable features along with various circuit block function explanations are listed below. • The Oscillator is a sawtooth generator whose charge (rise) cycle determines the output pulse width and dis- charge which is continuously variable from ...

Page 4

F 56K V CC ERROR 15K VOLTAGE 1 20K TRIM R RES. T 6.8V REF S2 TIMING S2 OPEN WHEN V10 > 6. 240pF 3V REF. + (CONTROL 3K 1.2V CIRCUIT REF. GND ON/OFF ...

Page 5

RECTIFIED AC LINE INPUT 30k 11k + 220 1.5k ON/OFF BIAS 12 4 VOLT- AGE 68 pF OPTO-COUPLER FIGURE 2. TYPICAL APPLICATION CIRCUIT FOR THE CA1523 8. ERROR 1 +7.5V 6.8V 30K ...

Page 6

... All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use ...

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