CA1524 PDF даташит
Спецификация CA1524 изготовлена «Intersil Corporation» и имеет функцию, называемую «Regulating Pulse Width Modulator». |
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Детали детали
Номер произв | CA1524 |
Описание | Regulating Pulse Width Modulator |
Производители | Intersil Corporation |
логотип |
16 Pages
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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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Functional Block Diagram
CA1524, CA2524, CA3524
15
V+
REFERENCE
REGULATOR
5V
16
VREF
+5V TO ALL
INTERNAL CIRCUITS
+5V
FLIP
FLOP
CA
12
SA
3
OSC OUT
+5V
6
RT
OSCILLATOR
7
CT
1
INV. INPUT
2
NON-INV.
INPUT
10 SHUTDOWN
COMPARATOR
+5V
-
ERROR
AMP
+
1kΩ
+5V
+5V
+
C.L.
-
11
EA
CB
13
SB
14
EB
+ SENSE
- SENSE
4
5
9
COMPENSATION AND COMPARATOR
10kΩ
8 GND
Test Circuit
8 - 40V
ls
V+
15
3
16
CA1524
2kΩ 2kΩ
1W 1W
12 OUT A
13 OUT B
11
14
8
6
72
1
9 10 4
5
0.1µF
RT CT
2kΩ 2kΩ
10kΩ
2kΩ
10
kΩ
1kΩ
2
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Specifications CA1524, CA2524, CA3524
Absolute Maximum Ratings
Thermal Information
Input Voltage (Between VIN and GND Terminals). . . . . . . . . . . . 40V
Operating Voltage Range (VIN to GND) . . . . . . . . . . . . . . . . 8 to 40V
Output Current Each Output:
(Terminal 11, 12 or 13, 14) . . . . . . . . . . . . . . . . . . . . . . . . . 100mA
Output Current (Reference Regulator) . . . . . . . . . . . . . . . . . . . 50mA
Oscillator Charging Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Thermal Resistance
θJA
Plastic DIP Package . . . . . . . . . . . . . . . . . . . . . . . . 100oC/W
Device Dissipation
Up to TA = +25oC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.25W
Above TA = +25oC . . . . . . . . . . . . . . .Derate Linearly at 10mW/oC
Operating Temperature Range . . . . . . . . . . . . . . . . -55oC to +125oC
Storage Temperature Range . . . . . . . . . . . . . . . . . . -65oC to +150oC
Lead Temperature (During Soldering)
At distance 1/16 ± in. (1.59mm ±0.79mm)
from case for 10s Max . . . . . . . . . . . . . . . . . . . . . . . . . . . . +265oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Electrical Specifications TA = -550C to +125oC for CA1524, 0oC to +70oC for the CA2524 and CA3524; V+ = 20V and
f = 20kHz, Unless Otherwise Stated.
PARAMETER
REFERENCE SECTION
Output Voltage
Line Regulation
Load Regulation
Ripple Rejection
Short Circuit Current Limit
Temperature Stability
Long Term Stability
OSCILLATOR SECTION
Maximum Frequency
Initial Accuracy
Voltage Stability
Temperature Stability
Output Amplitude
Output Pulse Width (Pin 3)
Ramp Voltage Low (Note 1)
Ramp Voltage High (Note 1)
Capacitor Charging Current Range
Timing Resistance Range
Charging Capacitor Range
Dead Time Expansion Capacitor on
Pin 3 (when a small osc. cap is used)
ERROR AMPLIFIER SECTION
Input Offset Voltage
Input Bias Current
Open Loop Voltage Gain
Common Mode Voltage
Common Mode Rejection Ratio
Small Signal Bandwidth
TEST CONDITIONS
V+ = 8 to 40V
IL = 0 to 20mA
f = 120Hz, TA = 25oC
VREF = 0, TA = 25oC
Over Operating Temperature
Range
TA = 25oC
CT = 0.001µF, RT = 2KΩ
RT and CT Constant
V+ = 8 to 40V, TA = 25oC
Over Operating Temperature
Range
Terminal 3, TA = 25oC
CT = 0.01µF, TA = 25oC
Pin 7
Pin 7
Pin 7 (5-2 VBE)/RT
Pin 6
Pin 7
Pin 3
VCM = 2.5V
VCM = 2.5V
TA = 25oC
TA = 25oC
AV = 0dB, TA = 25oC
CA1524, CA2524
MIN TYP MAX
CA3524
MIN TYP MAX
4.8 5 5.2 4.6 5 5.4
- 10 20 - 10 30
- 20 50 - 20 50
- 66 -
- 66 -
- 100 -
- 100 -
- 0.3 1
- 0.3 1
- 20 -
- 20 -
- 300 -
-5-
- -1
- -2
- 300 -
-5-
- -1
- -2
- 3.5 -
- 3.5 -
- 0.5 -
- 0.5 -
- 0.6 -
- 0.6 -
- 3.5 -
- 3.5 -
0.03 -
2 0.03 -
2
1.8 - 120 1.8 - 120
0.001 -
0.1 0.001 -
0.1
100 - 1000 100 - 1000
- 0.5 5 - 2 10
- 1 10 - 1 10
72 80 - 60 80 -
1.8 - 3.4 1.8 - 3.4
- 70 -
- 70 -
-3- -3-
UNITS
V
mV
mV
db
mA
%
mV/khr
kHz
%
%
%
V
µs
V
V
mA
kΩ
µF
pF
mV
µA
dB
V
dB
MHz
3
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