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CA1524E

Description
0.1A SWITCHING CONTROLLER, 300kHz SWITCHING FREQ-MAX, PDIP16, PLASTIC, DIP-16
CategoryPower/power management    The power supply circuit   
File Size34KB,3 Pages
ManufacturerRenesas Electronics Corporation
Websitehttps://www.renesas.com/
Download Datasheet Parametric View All

CA1524E Overview

0.1A SWITCHING CONTROLLER, 300kHz SWITCHING FREQ-MAX, PDIP16, PLASTIC, DIP-16

CA1524E Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerRenesas Electronics Corporation
Parts packaging codeDIP
package instructionDIP, DIP16,.3
Contacts16
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING CONTROLLER
control modeVOLTAGE-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage40 V
Minimum input voltage8 V
Nominal input voltage20 V
JESD-30 codeR-PDIP-T16
JESD-609 codee0
length19.35 mm
Number of functions1
Number of terminals16
Maximum operating temperature125 °C
Minimum operating temperature-55 °C
Maximum output current0.1 A
Package body materialPLASTIC/EPOXY
encapsulated codeDIP
Encapsulate equivalent codeDIP16,.3
Package shapeRECTANGULAR
Package formIN-LINE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height4.1 mm
surface mountNO
Switch configurationPUSH-PULL
Maximum switching frequency300 kHz
technologyBIPOLAR
Temperature levelMILITARY
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formTHROUGH-HOLE
Terminal pitch2.54 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width7.62 mm

CA1524E Preview

The CA1524 Pulse-Width Modulator-Driver For
An Electronic Scale
Application Note
March 1994
AN7174.1
The CA1524 pulse-width modulator integrated circuit
presently in use in voltage-regulator applications can also be
employed as the driving source for an electronic scale. As
shown in the block and schematic diagrams of Figures 1 and
2, half of the output of the CA1524, Q2, is used in a low-
voltage (2.2 volts) switching regulator that drives the LEDs
displaying the weight measured. The remaining output
stage, Q1, is used as a driver for the sampling plates PL1
and PL2. Since the CA1524 contains a 5V internal regulator
and is able to operate over a wide voltage range, 8V to 40V,
a single 9V battery is sufficient to power the total system.
The two sampling plates, PL1 and PL2, are driven by
oppositely phased signals (the frequency is held constant
but the duty cycle may change) from the pulse-width
modulator integrated circuit CA1524. The sensor, S, located
between the two plates forms with them an effective divider
network of the capacitance bridge type.
As the plate S is moved, the amount of movement
depending on the weight of the object on the scale, a change
in capacitance occurs. This change is reflected as a voltage
to the AC amplifier, the integrated circuit CA3160. At the null
position, the signals for PL1 and PL2, as detected at S, are
equal in amplitude, but opposite in phase. As S is driven by
the scale mechanism down toward PL2, the signal at S
becomes greater. The CA3160 AC amplifier provides a
buffer fro the small signal change noted at S. The output of
the CA3160 is converted to a DC voltage by peak-to-peak
detector. A detector of this type is needed because the duty
cycle of the sampled waveform is subject to change. The
detector signal is filtered further and displayed, by means of
the CA3161E and the CA3162E digital readout system, as
the weight of the object on the scale.
COUPLED TO MECHANICAL
SCALE MECHANISM
NO WEIGHT
FULL SCALE
PL1
OSCILLATOR
20kHz
(PART OF
CA1524)
S
AC
AMP
PL2
CA3130
PEAK TO
PEAK
DETECTOR
LOW PASS
FILTER
DC
VOLTAGE
DISPLAY
DRIVE
(PART OF
CA1524)
DIGITAL
METER AND
DISPLAY
FIGURE 1. BLOCK DIAGRAM - DIGITAL READOUT SCALE CIRCUIT
4-1
www.intersil.com or 407-727-9207
|
Copyright
©
Intersil Corporation 1999
Application Note 7174
9V
200pF
PL1
TO SCALE
MECHANISM
S
100MΩ
3
22MΩ
2
1
8
+
7
6
68K
10K
10µF
125µH
470µF
4.7K
5V
200Ω
2.5V
300K
A
B
C
6.2K
2µF
0.47
µF
2µF
0.1µF
910K
910K
10K
100µF
9V
39K
CA3160
CA3160
PL2
30K
2N4037
-
4
430Ω
9V
22MΩ
16 15 14 13 12 11 10 9
4.7K
CA1524
1
2
3
4
5
6 7
4700pF
8
0.01µF
6.2K
4.7K
4.7K
24K
FIGURE 2A.
2.5V
0.27µF
50K
+5V
COMMON
ANODE LED
DISPLAYS (NOTE 1)
ZERO
ADJ.
0.1
µF
16
8
A
B
C
9 12 14
MSD
NSD
LSD
POWER
2N2907
OR
EQUIV.
5
3
CA3162E
4
CA3161E
13
DIGIT DRIVERS
11
HIGH
INPUTS:
LOW
16
15
1
2
13
GAIN
ADJ.
7
BCD OUTPUTS
10KΩ
6
2
1
7
8
3
12
11
10
9
15
14
10
NOTE:
1.
FAIRCHILD FND507 OR EQUIVALENT
FIGURE 2B. CHEMATIC DIAGRAM OF DIGITAL READOUT SCALE
4-2
Application Note 7174
All Intersil semiconductor products are manufactured, assembled and tested under
ISO9000
quality systems certification.
Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with-
out 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; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site
www.intersil.com
Sales Office Headquarters
NORTH AMERICA
Intersil Corporation
P. O. Box 883, Mail Stop 53-204
Melbourne, FL 32902
TEL: (407) 724-7000
FAX: (407) 724-7240
EUROPE
Intersil SA
Mercure Center
100, Rue de la Fusee
1130 Brussels, Belgium
TEL: (32) 2.724.2111
FAX: (32) 2.724.22.05
ASIA
Intersil (Taiwan) Ltd.
7F-6, No. 101 Fu Hsing North Road
Taipei, Taiwan
Republic of China
TEL: (886) 2 2716 9310
FAX: (886) 2 2715 3029
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