CA3272A, CA3292A
July 1997
Quad-Gated Inverting Power Drivers with Fault
Mode Diagnostic Flag Output
Description
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.
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
F
“ON” if a fault is detected. When a fault is detected,
transistor Q
F
activates a current sink pull-down at the FAULT
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.
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.
Features
• Load Current Switching 600mA
• 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
• Operating Temperature Range -40
o
C to 125
o
C
Applications
•
•
•
•
•
•
Solenoids
Relays
Lamps
Steppers
Injectors
Motors
System Applications
•
•
•
•
Automotive
Appliance
Industrial Control
Robotics
Ordering Information
PART NUMBER
CA3272AQ
CA3292AQ
CA3272AM
CA3292AM
TEMP.
RANGE (
o
C)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
PACKAGE
28 Ld PLCC
28 Ld PLCC
28 Ld SOIC
28 Ld SOIC
PKG.
NO.
N28.45
N28.45
M28.3
M28.3
Pinouts
CA3272A, CA3292A (PLCC)
TOP VIEW
ENABLE
OUT B
OUT A
FAULT
OUT B
NC
NC
NC
25 GND
24 GND
23 GND
22 GND
21 GND
20 GND
19 GND
12 13 14 15 16 17 18
NC
IN D
OUT C
OUT D
IN C
V
CC
NC
NC
GND
GND
GND
GND
NC
NC
NC
NC
OUT C
CA3272A, CA3292A (SOIC)
TOP VIEW
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
OUT A
FAULT
IN A
IN B
ENABLE
GND
GND
GND
GND
NC
V
CC
IN C
IN D
OUT D
IN A
4
INDEX
GND 5
GND 6
GND 7
GND 8
GND 9
GND 10
GND 11
3
2
1
28 27 26
IN B
NC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
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Copyright
©
Intersil Corporation 1999
File Number
2223.7
1
INTERSIL [ INTERSIL CORPORATION ]
