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CA3272

更新时间： 2024-11-10 22:38:47
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Quad-Gated Inverting Power Drivers with Fault Mode Diagnostic Flag Output

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CA3272A, CA3292A  
Quad-Gated Inverting Power Drivers with Fault  
Mode Diagnostic Flag Output  
July 1997  
Features  
Description  
• Load Current Switching 600mA  
The CA3272A and CA3292A are Quad-Gated Inverting Power  
Drivers for interfacing low-level logic to inductive and resistive  
loads such as: relays, solenoids, AC and DC motors and resis-  
tive loads such as incandescent lamps and other power drivers.  
Each output is an open collector protected power transistor  
driver. The CA3292A is similar to the CA3272A, except for an  
added collector-to-base Zener diode that provides over-voltage  
clamping protection on each power switching output. The  
CA3292A block diagram is shown for one switching channel  
with fault detection logic plus the output fault driver circuit for all  
four switching channels. The FAULT output pin provides a flag  
output when a fault condition occurs. All four Output Power  
Driver stages are shown in the Block Diagrams.  
• Suitable for Resistive or Inductive Loads  
• Fault Mode Diagnostic Flag Output  
• CA3292A Over-Voltage Zener Clamp  
• Independent Over-Current Limiting  
• Independent Over-Temperature Shutdown  
• Temperature Shutdown Hysteresis  
• 5V CMOS or TTL Input Logic  
• High Dissipation Power-Frame Package  
o
o
• Operating Temperature Range -40 C to 125 C  
Applications  
• Solenoids  
• Relays  
• Lamps  
• Steppers  
• Injectors  
• Motors  
System Applications  
• Automotive  
• Appliance  
• Industrial Control  
• Robotics  
The ENABLE input is common to each of the four power  
switches and when low, disables the FAULT output. From the  
Input to Output, each switch is inverting. When IN is high, OUT  
is low and the transistor switch is “ON” (conducting). The block  
diagram shows the functional logic associated with fault detec-  
tion. The Fault Sense circuit detects the IN and OUT states and  
switches Q “ON” if a fault is detected. When a fault is detected,  
F
transistor Q activates a current sink pull-down at the FAULT  
F
pin. A resistive load from the FAULT pin to the power supply is  
used to detect a fault as a low state. Both shorted and open  
load conditions are detected.  
Ordering Information  
TEMP.  
PKG.  
NO.  
o
PART NUMBER RANGE ( C)  
PACKAGE  
Note: The CA3272A replaces the CA3272 for new designs.  
Refer to the Fault Sink Current specifications when making  
design changes. The CA3272A and CA3292A have increased  
pull-down current drive from the FAULT output pin.  
CA3272AQ  
CA3292AQ  
CA3272AM  
CA3292AM  
-40 to 125 28 Ld PLCC  
-40 to 125 28 Ld PLCC  
-40 to 125 28 Ld SOIC  
-40 to 125 28 Ld SOIC  
N28.45  
N28.45  
M28.3  
M28.3  
Pinouts  
CA3272A, CA3292A (PLCC)  
CA3272A, CA3292A (SOIC)  
TOP VIEW  
TOP VIEW  
OUT B  
NC  
1
2
3
4
5
6
7
8
9
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
OUT A  
FAULT  
IN A  
NC  
4
3
2
1
28 27 26  
INDEX  
IN B  
NC  
GND  
NC  
ENABLE  
GND  
25  
24  
23  
22  
21  
20  
19  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
5
6
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
7
GND  
8
GND  
9
NC 10  
NC 11  
NC  
10  
11  
V
CC  
NC 12  
IN C  
12 13 14 15 16 17 18  
NC 13  
IN D  
OUT C 14  
OUT D  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
File Number 2223.7  
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999  
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