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PDF CA1523 Data sheet ( Hoja de datos )
| Número de pieza | CA1523 | |
| Descripción | Voltage Regulator Control Circuit | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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November 2000
Features
®
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Voltage Regulator Control Circuit
for Variable Switching Regulator
Description
• Operates up to 200kHz
• Pins ESD Protected
• Remote ON/OFF
• Slow Start with Reset
• Overcurrent Sensing
• Lower Peak Currents than PWM Regulator
- Less Prone to Magnetic Saturation
Part Number Information
PART
NUMBER
CA1523E
TEMPERATURE
RANGE
0oC to +70oC
PACKAGE
14 Lead Plastic DIP
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.
Pinout
CA1523 (PDIP)
TOP VIEW
ERROR 1
CURRENT SENSE 2
GND 3
RISE TIME 4
OUTPUT GND 5
OUTPUT 6
VCC 7
14 TIMING
13 ZENER
12 ON/OFF
11 OVER CURRENT
10 SLOW START
9 LOGIC OUTPUT
8 NC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
1
File Number 1785.3
1 page  
CA1523
+150V
RECTIFIED AC LINE
INPUT
30k
+
68µF
11k
5.6k
10W
11V
TYP. INPUT
--+--1---5--0---
0.85 A
20k (TRIM RESISTOR)
13V
16k + SENSE
4.7µF
TRANSFORMER
SEC. “D”
TYPICAL
RECT.
OUTPUT
V01 +130V
V04 -24V
ON/OFF
BIAS
VOLT-
AGE
1.5k
NC NC NC
10 8
220
9 13 1
CA1523
12 4
14 3
2
68
pF
OPTO-COUPLER
240
pF
68k
7
6
11 5
0.0033
µF
47Ω
10k
22pF
RFP 7N40
0.15
3W
SEC. “C”
SEC. “D”
V02 +16V
V03 +24V
FIGURE 2. TYPICAL APPLICATION CIRCUIT FOR THE CA1523
8.3K
+
ERROR
1
+7.5V
SLOW
START
10
30K
1.5K
+VCC
3K 12K
6K
8K 15K
10K
+
2 10K
6.8V
BAND 1.21V
GAP
REF
VOLTAGE
1.8K
VCC
7
4K
+VCC
+7.5V
2K
5.0V - VH
2K +
R
Q
2.5V
- VL
+
S
Q
2K
1.5K
14
9
LOGIC OUT
FIGURE 3. TIMING CIRCUIT FOR THE CA1523
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet CA1523.PDF ] | |
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