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CA1523 の電気的特性と機能

CA1523のメーカーはIntersil Corporationです、この部品の機能は「Voltage Regulator Control Circuit」です。


製品の詳細 ( Datasheet PDF )

部品番号 CA1523
部品説明 Voltage Regulator Control Circuit
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 




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CA1523 Datasheet, CA1523 PDF,ピン配置, 機能
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 pdf, ピン配列
CA1523
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 very low to
maximum of ICHARGE.
• Charge ICHARGE = IO -IDISCHARGE giving 2 to 1 pulse-width
control
• Discharge IDISCHARGE = approximately 0 to 1/2 IO to
frequency control.
Pulse Shaping: Applied to the oscillator output via RS
Flip-Flop with parallel inhibit controlled by slow-start over-
current sense, supply voltage monitor and ON/OFF func-
tions.
Pulse Rise Time: Modified to meet RFI requirements by
external slow-down capacitor.
Slow Start with Reset: Externally programmed against
internal 3V reference. Reset is initiated upon Inhibit ensur-
ing soft start at power up and restart.
Over Current Sense: Internal stable thresholds of 1.2V.
Supply Voltage Monitors: Locks out the drive until
VSUPPLY has reached 8V-9V.
ON/OFF: Activates regulator independent of raw DC.
Error Amplifier: Compares output against a stable 6.8V
internal reference and controls the discharge current sink
on the timing capacitor.
Band-Gap: Reference voltage (internal) provides temper-
ature compensated 1.2V and 6.8V references.
Separate GND: The power GND is separated from circuit
ground for improved noise.
ESD Protection: Pins are protected against ESD.
Block Diagram
CURRENT
SENSE
2
VCC
7
ZENER
13
CURRENT
SETUP
REF. VOLTAGE
SOURCES
IC/2
1
ERROR
VOLTAGE
6.8V
REF.
14
TIMING
CAP
S2 OPEN
WHEN VIO > 6.8V
3V
REF.
-
+
S1
+6.8V
REF.
IC VCC
Q HIGH CLOSES S1
VL +
2.5V
-
ID
+
ID ~ IC/2
FOR
VH
5V
-
VI << 6.8V
3
GND
(CONTROL
CIRCUIT
GND)
3K
S3
VCC > 8.4V
1.2V
REF.
-
+
Q LOW
CLOSES S3
SQ
F/F
R
SQ
F/F
R
5V
REF.
4
RISE
TIME
6
PULSE
OUTPUT
5
OUTPUT
GND
11
OVER
CURRENT
10
SLOW
START
12
ON/OFF
9
LOGIC
OUT
3


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CA1523 電子部品, 半導体
CA1523
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6 Page



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共有リンク

Link :


部品番号部品説明メーカ
CA1523

Voltage Regulator Control Circuit

Intersil Corporation
Intersil Corporation
CA1524

Regulating Pulse Width Modulator

Intersil Corporation
Intersil Corporation


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