ca3228 Harris Corporation, ca3228 Datasheet
ca3228
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ca3228 Summary of contents
Page 1
... Copyright Harris Corporation 1999 Speed Control System with Memory Description The CA3228 is a monolithic integrated circuit designed as an automotive speed-control system. The system monitors vehicle speed and compares stored reference speed. Any deviation in vehicle speed causes a servo mechanism to open or close the engine throttle as required to eliminate the speed error ...
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... Command Idle Voltage RESUME Command Voltage ACCEL Command Voltage COAST Command Voltage OFF Voltage ON Voltage Brake Input Voltage OUTPUT VOTLAGE Gate VAC VENT Specifications CA3228 Thermal Information Thermal Resistance Plastic DIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Power Dissipation Per Package For +150 ...
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... SENSOR INPUT F/V 9 F/V OUT CONVERTER 10 F/V FILTER MEMORY CURRENT CURRENT 7 SENSE SENSE Specifications CA3228 8.20V, Unless Otherwise Specified (Refer to Figures 2 and 3) CC SYMBOLS TEST PIN TEST CONDITIONS 21, 22 Sweep Pin 19, DB Voltage at 1V/sec A 16 ...
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... NO NO YES YES IGNITION > 25MPH? OFF? NO YES Redundant BRAKE YES YES OFF BRAKE > 40ms YES CLUTCH DISABLE? CA3228 ERASE MEMORY YES YES NO NO OFF IGNITION > 40 ms? OFF? NO ACCEL? YES > 25MPH? YES INPUT > 40ms? YES RELAX ACCEL AT SERVO CONTROLLED RATE ...
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... V VAC CC VENT CA3228E (SEE FIGURE 2) 620 4.7K 0.5W GATE ACCEL CRUISE VAC (Pin 22 VENT (Pin 21 GATE (pin 23 FIGURE 3. SOLENOID DRIVERS AND SERVO VACUUM CONTROL MECHANISM TYPICAL APPLICATION CA3228 T.P.A. 0 560 10K 3 0. 10K 5 0.001 8.2K 43K 8 0.047 F ...
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... FREQUENCY FIGURE 4. TYPICAL D/A MEMORY VOLTAGE, V CA3228 FREQUENCY Memory Voltage, V Upon release of the ACCEL or COAST switches the voltage, representing vehicle speed V from the frequency-to-voltage converter, is stored as a binary number bit counter. A memory update compar- ator allows clocking of the counter until memory voltage V equals V ...
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... The Resume Comparator is used when the following sequence of events occurs: A speed is set in memory, the brake applied, causing the vehicle lower speed, and the RESUME switch is activated. CA3228 Activation of the RESUME switch causes a fixed accelera- , tion rate from the lower speed until the capacitor voltage at ...
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... ACCEL V CC COAST Q31 - 8 Q30 + I23 0.376 ENABLE Q26 - Q27 + I21 0.121 OFF V CC FIGURE 6. FUNCTIONAL BLOCK DIAGRAM FOR SPEED CONTROL (Continued On Next Page) CA3228 ON/OFF ON ACTIVE HIGH --------- - + - 79 BE Q284 2 11 COMMAND DELAY TIME GEN CMD ...
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... CA3228 FIGURE 6. FUNCTIONAL BLOCK DIAGRAM FOR SPEED CONTROL 10-39 Q174 (Continued) ...