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CA3273
April 1994
High-Side Driver
Description
The CA3273 is a power IC equivalent of a P-N-P pass transistor 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 supply and load terminals may be required to prevent damage due to severe conditions (such as load dump, reverse battery 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.
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. . . . . . . . . +150oC * 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
Ordering Information
PART NUMBER CA3273 TEMPERATURE RANGE -40oC to +85oC PACKAGE TO-202 Modified SIP
Pinout
CA3273 (SIP) TOP VIEW
Block Diagram
OUTPUT PASS TRANSISTOR
VCC (3) VO (LOAD) (2) VSW (CONTROL) (1) VCC (SUPPLY) PIN 1
ICC
RS
IO
VO PIN 3
DRIVE AND LIMITING CONTROL
RL LOAD
CA3273 PIN 2 VSW CONTROL INPUT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 407-727-9207 | Copyright (c) Intersil Corporation 1999
File Number
2113.4
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Specifications CA3273
Absolute Maximum Ratings
Fault Max, Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . 40V Maximum Operating VCC: At IO = 400mA (-40oC to +85oC Ambient) . . . . . . . . . . . . . . 16V At IO = 600mA (-40oC to +25oC Ambient) . . . . . . . . . . . . . . 24V Max. Positive Output Peak Pulse, VSW Open . . . . . . . . . .VCC +12V Max. Operating Output Load Current . . . . . . . . . . . . . . . . . . 600mA Short Circuit Load Current, ISC . . . . . . . . . . . . . . . . Internal Limiting Reverse Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -13V
Thermal Information
Thermal Resistance JA Plastic SIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . +70oC/W Maximum Power Dissipation, PD At +25oC Ambient, TA (Note 1). . . . . . . . . . . . . . . . . . . . . . . 1.8W Derate above +25oC (No Heat Sink) . . . . . . . . . . . . . 14.3mW/oC Maximum Junction Temperature, TJ (Note 2) . . . . . . . . . . . . 150oC Ambient Operating Temperature Range . . . . . . . . . -40oC to +85oC Storage Temperature Range. . . . . . . . . . . . . . . . . . -40oC to +150oC Lead Temperature (Soldering 10s max) . . . . . . . . . . . . . . . . +265oC
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
PARAMETERS Operating Voltage Range Saturation Voltage(VCC - VO) Operating Load
TA = -40oC to +85oC, Unless Otherwise Noted, See Block Diagram for Test Pin Reference SYMBOL VCC VSAT RL TEST CONDITIONS VCC Reference to VSW IO = -400mA, VSW = 0V, VCC = 16V VSW = 0V (Switch ON) TA = +85oC, VCC = 16V TA = +25oC,VCC = 24V 40 40 25 VCC =16V, VSW = 0V IO = 0mA IO = -400mA -15 -22 -33 mA mA mA 33 150 40 1.2 V A
oC
MIN 4 -
TYP -
MAX 24 0.5
UNITS V V
Over-Voltage Shutdown Threshold Over-Current Limiting Over-Temperature Limiting Control Current, Switch ON
VCC(THD) IO(LIM) TLIM ISW
VSW = 0V, RL = 1k, Increase VCC, (VO goes low) VCC =16V, VSW = 1V (Switch ON)
Control Current, Max. Load, Switch ON Max. Control Current,High and Low VCC ISW(MAX)
VCC = 24V, VSW = 0V, IO = -600mA RL = 40, VSW = 1V VCC = 24V VCC = 7V
-50 -50
-
-
mA mA
Min. Control Current, No Load, Switch OFF
ISW(NL)
VO = Open, (Switch OFF) VCC = 24V,VSW = 23V VCC = 7V, VSW = 6V -200 -200 +50 +50 A A
Output Current Leakage
IO(LEAK)
VO = 0V, VCC = 16V, (Switch OFF) VSW =16V VSW =15V -100 -100 +100 +100 A A
NOTES: 1. The calculation for dissipation and junction temperature rise due to dissipation is: PD = (VCC - VO)x I O + VCC x ISW and TJ = TA + PD x JA where TJ is device junction temperature, TA is ambient temperature and JA is the junction-to-ambient thermal resistance. 2. Thermal limiting occurs at +150oC on the chip.
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CA3273
VCC INPUT 1
RS
OUTPUT PASS TRANSISTOR 3
VO OUTPUT
BANDGAP VOLTAGE/CURRENT REFERENCE
OVER-VOLTAGE SHUTDOWN
THERMAL LIMIT
CURRENT LIMIT OUTPUT DEVICE BASE DRIVE CONTROL CIRCUIT
2
VSW CONTROL INPUT
FIGURE 1. FUNCTIONAL BLOCK DIAGRAM OF CA3273
VZ +4 TO +24V (SUPPLY INPUT) VSW ON CONTROL INPUT 1K OFF 2N5320 OR EQUIVALENT L ON CONTROL INPUT 1K OFF VZ VCC CA3273 VCC VO VSW CA3273
VO RL 40
2N5320 OR EQUIVALENT
FIGURE 2. TYPICAL APPLICATION WITH ZENER DIODE FOR OVER-VOLTAGE PROTECTION WITH INDUCTIVE LOAD SWITCHING. VZ 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 VCC - VZ.
FIGURE 3. OPTIONAL RANGE SHIFTING OF THE VCC INPUT VOLTAGE USING A ZENER DIODE TO OFFSET THE VSW CONTROL PIN. (I.E.,THE OVER-VOLTAGE SHUTDOWN THRESHOLD WILL BE INCREASED TO VCC(THD) + VZ AND THE MINIMUM VCC OPERATING VOLTAGE IS VZ + 4V).
2 DISSIPATION WATTS (W) DERATING 70oC/W (WITHOUT HEAT SINK)
RESISTIVE
LAMP 1 SOLENOID
0 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (oC)
RELAY
FIGURE 4. DISSIPATION DERATING CURVES
FIGURE 5. TYPICAL LOADS
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CA3273
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
Sales Office Headquarters
NORTH AMERICA Intersil Corporation P. O. Box 883, Mail Stop 53-204 Melbourne, FL 32902 TEL: (407) 727-9207 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. 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
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