3-3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
407-727-9207
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Copyright
Intersil Corporation 1999
CA3273
High-Side Driver
Description
The CA3273 is a power IC equivalent of a P-N-P pass tran-
sistor operated as a high-side-driver current switch in either
the saturated (ON) or cutoff (OFF) modes. The CA3273
incorporates circuitry to protect the pass currents, excessive
input voltage, and thermal overstress. The high-side driver is
intended for general purpose, automotive and potentially
high-stress applications. If high-stress conditions exist, the
use of an external zener diode of 35V or less between sup-
ply and load terminals may be required to prevent damage
due to severe conditions (such as load dump, reverse bat-
tery and positive or negative transients). The CA3273 is
designed to withstand a nominal reverse-battery
(VBAT = 13V) condition without permanent damage to the
IC. The CA3273 is supplied in a modified 3-lead TO-202
plastic power package.
Ordering Information
PART
NUMBER
TEMPERATURE
RANGE
PACKAGE
CA3273
-40
o
C to +85
o
C
TO-202 Modified SIP
Features
Equivalent High Pass P-N-P Transistor
Current Limiting . . . . . . . . . . . . . . . . . . . . . .0.6A to 1.2A
Over-Voltage Shutdown . . . . . . . . . . . . . . +25V to +40V
Junction Temperature Thermal Limit. . . . . . . . . +150
o
C
Equivalent Beta of 25. . . . . . . . . . . . . . . . . . 400mA/0.5V
Internal Bandgap Voltage and Current Reference
Applications
Fuel Pump Driver
Relay Driver
Solenoid Driver
Stepper Motor Driver
Remote Power Switch
Logic Control Switch
April 1994
File Number
2113.4
Pinout
CA3273 (SIP)
TOP VIEW
Block Diagram
(3) V
O
(LOAD)
(2) V
SW
(CONTROL)
(1) V
CC
(SUPPLY)
DRIVE AND LIMITING
CONTROL
R
S
V
O
LOAD
V
CC
PIN 1
R
L
CA3273
PIN 2
PIN 3
OUTPUT PASS
TRANSISTOR
I
O
CONTROL
I
CC
INPUT
V
SW
3-4
Specifications CA3273
Absolute Maximum Ratings
Thermal Information
Fault Max, Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . 40V
Maximum Operating V
CC
:
At I
O
= 400mA (-40
o
C to +85
o
C Ambient) . . . . . . . . . . . . . . 16V
At I
O
= 600mA (-40
o
C to +25
o
C Ambient) . . . . . . . . . . . . . . 24V
Max. Positive Output Peak Pulse, V
SW
Open . . . . . . . . . .V
CC
+12V
Max. Operating Output Load Current . . . . . . . . . . . . . . . . . . 600mA
Short Circuit Load Current, I
SC
. . . . . . . . . . . . . . . . Internal Limiting
Reverse Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -13V
Thermal Resistance
JA
Plastic SIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . +70
o
C/W
Maximum Power Dissipation, P
D
At +25
o
C Ambient, T
A
(Note 1). . . . . . . . . . . . . . . . . . . . . . . 1.8W
Derate above +25
o
C (No Heat Sink) . . . . . . . . . . . . . 14.3mW/
o
C
Maximum Junction Temperature, T
J
(Note 2) . . . . . . . . . . . . 150
o
C
Ambient Operating Temperature Range . . . . . . . . . -40
o
C to +85
o
C
Storage Temperature Range. . . . . . . . . . . . . . . . . . -40
o
C to +150
o
C
Lead Temperature (Soldering 10s max) . . . . . . . . . . . . . . . . +265
o
C
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
T
A
= -40
o
C to +85
o
C, Unless Otherwise Noted, See Block Diagram for Test Pin Reference
PARAMETERS
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Operating Voltage Range
V
CC
V
CC
Reference to V
SW
4
-
24
V
Saturation Voltage(V
CC
- V
O
)
V
SAT
I
O
= -400mA, V
SW
= 0V, V
CC
= 16V
-
-
0.5
V
Operating Load
R
L
V
SW
= 0V (Switch ON)
T
A
= +85
o
C, V
CC
= 16V
40
-
-
T
A
= +25
o
C,V
CC
= 24V
40
Over-Voltage Shutdown Threshold
V
CC(THD)
V
SW
= 0V, R
L
= 1k
, Increase V
CC,
(V
O
goes low)
25
33
40
V
Over-Current Limiting
I
O(LIM)
V
CC
=16V, V
SW
= 1V (Switch ON)
-
-
1.2
A
Over-Temperature Limiting
T
LIM
-
150
-
o
C
Control Current, Switch ON
I
SW
V
CC
=16V, V
SW
= 0V
I
O
= 0mA
-
-15
-
mA
I
O
= -400mA
-
-22
-
mA
Control Current, Max. Load,
Switch ON
V
CC
= 24V, V
SW
= 0V,
I
O
= -600mA
-
-33
-
mA
Max. Control Current,High and
Low V
CC
I
SW(MAX)
R
L
= 40
, V
SW
= 1V
V
CC
= 24V
-50
-
-
mA
V
CC
= 7V
-50
-
-
mA
Min. Control Current, No Load,
Switch OFF
I
SW(NL)
V
O
= Open, (Switch OFF)
V
CC
= 24V,V
SW
= 23V
-200
-
+50
A
V
CC
= 7V, V
SW
= 6V
-200
-
+50
A
Output Current Leakage
I
O(LEAK)
V
O
= 0V, V
CC
= 16V, (Switch OFF)
V
SW
=16V
-100
-
+100
A
V
SW
=15V
-100
-
+100
A
NOTES:
1. The calculation for dissipation and junction temperature rise due to dissipation is: P
D
= (V
CC
- V
O
)x I
O
+ V
CC
x I
SW
and
T
J
= T
A
+ P
D
x
JA
where T
J
is device junction temperature, T
A
is ambient temperature and
JA
is the junction-to-ambient
thermal resistance.
2. Thermal limiting occurs at +150
o
C on the chip.
3-5
CA3273
FIGURE 1. FUNCTIONAL BLOCK DIAGRAM OF CA3273
FIGURE 2. TYPICAL APPLICATION WITH ZENER DIODE FOR
OVER-VOLTAGE PROTECTION WITH INDUCTIVE
LOAD SWITCHING. V
Z
SHOULD BE LESS THAN
35V. WHEN CURRENT IS SWITCHED OFF IN THE
OUTPUT LOAD (L), THE INDUCTIVE KICK PULSE
GOES NEGATIVE. THE CLAMPED CLAMP LEVEL
OF THE NEGATIVE GOING PULSE IS V
CC
- V
Z
.
FIGURE 3. OPTIONAL RANGE SHIFTING OF THE V
CC
INPUT
VOLTAGE USING A ZENER DIODE TO OFFSET
THE V
SW
CONTROL PIN. (I.E.,THE OVER-VOLT-
AGE SHUTDOWN THRESHOLD WILL BE IN-
CREASED TO V
CC(THD)
+ V
Z
AND THE MINIMUM
V
CC
OPERATING VOLTAGE IS V
Z
+ 4V).
FIGURE 4. DISSIPATION DERATING CURVES
FIGURE 5. TYPICAL LOADS
THERMAL
LIMIT
CURRENT
LIMIT
OVER-VOLTAGE
OUTPUT DEVICE
2
1
R
S
V
CC
3
V
O
INPUT
OUTPUT
BASE DRIVE
CONTROL CIRCUIT
SHUTDOWN
V
SW
CONTROL INPUT
BANDGAP
VOLTAGE/CURRENT
REFERENCE
OUTPUT PASS
TRANSISTOR
CA3273
V
SW
V
O
V
CC
+4 TO +24V
1K
2N5320
CONTROL
(SUPPLY INPUT)
OR EQUIVALENT
ON
OFF
INPUT
V
Z
L
40
CA3273
V
SW
V
CC
1K
2N5320
CONTROL
OR EQUIVALENT
ON
OFF
INPUT
V
O
V
Z
R
L
1
2
0
-50
-25
0
25
50
75
100
125
150
TEMPERATURE (
o
C)
DISSIP
A
TION W
A
TTS (W)
(WITHOUT HEAT SINK)
DERATING 70
o
C/W
RESISTIVE
LAMP
SOLENOID
RELAY
3-6
All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without
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 http://www.intersil.com
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NORTH AMERICA
Intersil Corporation
P. O. Box 883, Mail Stop 53-204
Melbourne, FL 32902
TEL: (407) 727-9207
FAX: (407) 724-7240
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Mercure Center
100, Rue de la Fusee
1130 Brussels, Belgium
TEL: (32) 2.724.2111
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Taiwan Limited
7F-6, No. 101 Fu Hsing North Road
Taipei, Taiwan
Republic of China
TEL: (886) 2 2716 9310
FAX: (886) 2 2715 3029
CA3273
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